Harbeth NLE-1 Active DSP Loudspeakers | Audio T
Your search results will appear here
Harbeth NLE-1 Active DSP Loudspeakers - Pair

Harbeth NLE-1 Active DSP Loudspeakers - Pair

Audio T Verdict

The Harbeth NLE-1 is not simply an active version of one of the company's traditional passive speakers. It represents a fundamentally different approach, combining Harbeth's proprietary RADIAL cone technology with DSP, active crossover filtering and dedicated amplification for each drive unit.

Each compact cabinet contains a 110mm Harbeth-made RADIAL bass/mid driver and a 19mm ferrofluid-cooled tweeter. Rather than splitting the signal with a conventional passive crossover after the amplifier, the NLE-1 performs the crossover electronically through its internal DSP before sending each driver to its own dedicated 50W Class-D amplifier channel.

This gives Harbeth far greater control over the complete loudspeaker system. The designers know the exact drive units, amplification and crossover behaviour being used, so the speaker can be optimised as one complete electro-acoustic package rather than relying on an unknown external power amplifier.

The NLE-1 still needs a source, though. Balanced XLR and unbalanced analogue inputs are provided, making it easy to partner with a streamer, DAC or preamplifier offering variable-level analogue outputs. Each speaker needs its own signal feed and mains connection.

Vinyl is possible too, but there is an important distinction: the NLE-1 does not contain a conventional moving-magnet or moving-coil phono stage. A turntable therefore requires a built-in phono preamp and volume control, or an external phono stage followed by suitable volume control.

Harbeth's three-position Personality Switch is particularly useful domestically. Default mode provides the company's intended neutral starting point, Extended Bass gives the little cabinet more apparent low-frequency weight at the expense of maximum playback level, while Near-wall/Desktop reduces bass and lower-midrange energy to compensate when the speakers are positioned close to a boundary.

That makes the NLE-1 unusually adaptable. It can work as a compact Hi-Fi loudspeaker on stands, a nearfield monitor on a desk, in a professional control room or as part of a larger active multichannel system.

The result is unmistakably modern Harbeth: compact, colourful and technically very different from the traditional veneered passive range, but still built around the company's long-running work into low-colouration drive-unit behaviour and accurate reproduction.

Harbeth NLE-1 Active DSP Loudspeakers

NLE stands for The New Listening Experience.

The NLE-1 combines Harbeth's proprietary drive-unit technology with internal DSP and dedicated Class-D amplification to create a compact self-powered loudspeaker for domestic and professional use.

Key features include:

  • Fully active two-way loudspeaker
  • 110mm Harbeth-made RADIAL bass/mid driver
  • 19mm ferrofluid-cooled tweeter
  • Internal DSP crossover
  • Dedicated 50W Class-D amplification for each driver
  • High damping-factor amplifier design
  • 75Hz to 20kHz ±3dB free-space response
  • Balanced XLR analogue input
  • Unbalanced analogue input
  • Three-position Personality Switch
  • Default listening mode
  • Extended Bass mode
  • Near-wall/Desktop mode
  • Independent rear level control per speaker
  • Nelson bass-extender integration
  • Compact 275mm-high cabinet
  • Seven contemporary finish options
  • Designed and handmade in the UK

What Does NLE Mean?

NLE stands for:

The New Listening Experience.

The name reflects Harbeth's move away from the conventional passive loudspeaker architecture used throughout most of its established range.

Instead of requiring an external power amplifier and passive crossover, the NLE-1 integrates:

  • Digital Signal Processing
  • Active crossover filtering
  • Dedicated bass/mid amplification
  • Dedicated treble amplification
  • Room-position compensation

What Does Active Mean?

A conventional passive loudspeaker receives a high-power speaker signal from an external amplifier.

The NLE-1 is different.

Each cabinet contains the power amplification required to drive its own bass/mid and tweeter.

You therefore do not need a conventional integrated or power amplifier between your source and the loudspeakers.

You Still Need Volume Control

Active does not necessarily mean completely self-contained.

Harbeth recommends feeding the NLE-1 from a line-level analogue source with proper volume control, such as:

  • Streaming preamplifier
  • DAC with variable output
  • Analogue preamplifier
  • CD player with variable output
  • Suitable mixer or studio interface
  • Turntable system with phono amplification and volume control

Do Not Assume the Rear Speaker Controls Are the Main Volume Control

Harbeth recommends starting with the rear level controls of both NLE-1 speakers at maximum and adjusting normal listening volume from the connected source or preamplifier.

The individual speaker controls are particularly useful for fine left/right balance adjustment.

Harbeth advises against feeding an unnecessarily high fixed-level source into the NLE-1 and then using the speaker controls simply to reduce room volume, because the internal analogue-to-digital converter can be overloaded by an excessively high input signal.

110mm Harbeth RADIAL Driver

The NLE-1 uses a 110mm Harbeth-made RADIAL bass/mid driver.

RADIAL technology grew from Harbeth's long-running research into loudspeaker cone materials and the relationship between diaphragm resonance and audible colouration.

The relatively small driver is responsible for the majority of the musical range before handing over to the tweeter.

RADIAL, Not RADIAL4

Harbeth's current NLE-1 specification simply describes this as a Harbeth-made RADIAL driver.

Unlike the passive XD2 models, Harbeth does not currently apply the RADIAL4 designation to the NLE-1 specification, so Audio T would not describe it as a RADIAL4 driver without further manufacturer confirmation.

19mm Ferrofluid-Cooled Tweeter

A compact 19mm ferrofluid-cooled tweeter handles the highest frequencies.

This is smaller than the 25mm tweeters used across much of Harbeth's passive XD2 range and forms part of the NLE-1's purpose-designed active system.

Active DSP Crossover

The NLE-1 does not rely on a conventional passive crossover positioned between one power amplifier and the drive units.

Instead, the incoming analogue signal is converted internally for Digital Signal Processing.

The DSP can then control:

  • Crossover behaviour
  • Driver integration
  • Frequency response
  • Phase behaviour
  • Position-dependent tonal modes

The processed signals are subsequently sent to the appropriate dedicated amplifier channels.

Two 50W Amplifier Channels Per Speaker

Each NLE-1 contains a pair of dedicated 50W Class-D amplifier channels.

One drives the 110mm bass/mid unit while the other powers the 19mm tweeter.

Harbeth describes the amplifier design as ultra-low distortion and high damping factor.

Why Active Amplification Can Be Useful

Because Harbeth supplies the amplification as part of the loudspeaker, its engineers know exactly what electrical system each driver will be connected to.

That eliminates several variables associated with a passive system, including:

  • External amplifier output characteristics
  • Passive crossover interaction
  • Speaker cable between amplifier and crossover
  • Variation in available damping factor

You can still hear differences between source components because everything upstream of the active loudspeaker remains part of the reproduction chain.

75Hz to 20kHz Frequency Response

Harbeth specifies the NLE-1 at:

75Hz – 20kHz ±3dB in free space.

That specification applies to the loudspeaker's published reference performance rather than claiming deep sub-bass from a 275mm-high cabinet.

The Personality Switch can alter low-frequency balance, while the Nelson bass extender can be added where substantially deeper bass is required.

Personality Switch

A three-position switch on the NLE-1 allows its DSP response to be adapted to the installation.

The available positions are:

  • Default
  • Extended Bass
  • Near-wall/Desktop

Default Mode

Default is Harbeth's reference starting position.

The company describes its tonal balance as similar to other small closed-box speakers such as the P3ESR.

It is intended primarily for normal listening with the loudspeakers positioned away from the walls.

Extended Bass Mode

The middle switch position produces deeper bass and gives the NLE-1 a greater subjective sense of scale.

There is, however, a trade-off.

Harbeth states that the speaker's maximum available loudness is reduced in Extended Bass mode.

Extended Bass Does Not Have a Published ±3dB Figure

Harbeth's marketing describes the mode as providing an extra octave of bass, but its technical specification does not publish a separate lower-frequency ±3dB figure for this setting.

We therefore recommend treating it as a useful DSP voicing option rather than assuming a specific guaranteed low-frequency extension.

Near-Wall/Desktop Mode

Placing a loudspeaker close to a wall reinforces parts of its bass and lower midrange.

Near-wall/Desktop mode reduces output through these regions to compensate for some of that boundary reinforcement.

This makes the NLE-1 particularly flexible for:

  • Desktop listening
  • Studio meter bridges
  • Shelves with suitable ventilation
  • Rooms where the speakers cannot sit far from the rear wall

Which Personality Mode Should I Use?

Harbeth explicitly encourages experimentation.

A useful starting point is:

  • Default: speakers on stands with useful space around them
  • Extended Bass: free-space positioning and moderate listening levels where extra weight is desirable
  • Near-wall/Desktop: speakers close to walls or used on a desk

The best setting ultimately depends on your room and listening preference.

Balanced XLR Input

Each speaker provides a balanced analogue XLR input.

This is particularly useful with:

  • Balanced streaming preamplifiers
  • Balanced DACs
  • Professional studio equipment
  • Mixing consoles
  • Audio interfaces
  • Balanced preamplifiers

In a stereo system, the left and right source outputs feed the corresponding NLE-1 speaker.

Unbalanced Analogue Input

An unbalanced analogue connection is also provided for compatible domestic sources.

Harbeth notes that this input is more sensitive than the XLR connection, meaning it can provide greater output with lower-level source signals.

The Analogue Input Is Not a Phono Stage

This is particularly important for turntable users.

Although Harbeth occasionally refers to the connector as an RCA/phono input, phono in this context refers to the connector format rather than an internal cartridge phono preamplifier.

An ordinary turntable with a conventional moving-magnet or moving-coil cartridge cannot simply be connected directly.

Turntables Need Phono Amplification

To play vinyl directly into the NLE-1 you need either:

  • A turntable with built-in phono preamplifier and volume control
  • An external phono stage feeding a preamplifier or other volume-controlled source

A conventional cartridge output is far too low in level and requires the correct RIAA equalisation before reaching the NLE-1.

Do Not Use Both Inputs Simultaneously

Harbeth instructs users to choose either the balanced or unbalanced input for normal operation rather than connecting different programme sources to both simultaneously.

Connecting a Streamer

A streamer with variable analogue outputs makes a particularly neat NLE-1 system.

For example:

  • Streamer left output to left NLE-1
  • Streamer right output to right NLE-1
  • Set both NLE-1 rear controls initially to maximum
  • Control normal listening volume from the streamer

A separate power amplifier is not required.

Connecting a DAC

A DAC can connect directly provided it offers appropriate variable analogue output.

If the DAC has fixed-level outputs only, place a suitable preamplifier or analogue volume controller between it and the NLE-1.

Connecting a CD Player

A CD player can be used where suitable analogue level control is available.

If your CD player has fixed analogue output only, use a preamplifier rather than relying on the individual rear speaker trims as the everyday system-volume control.

Connecting a Pre-Amplifier

A conventional analogue preamplifier is a natural partner for the NLE-1.

This is particularly useful when several sources need to share one pair of active speakers, for example:

  • Turntable and phono stage
  • CD player
  • Streamer
  • DAC
  • Tuner

Each Speaker Needs Power

Because both NLE-1 loudspeakers contain active electronics and amplification, each cabinet requires its own mains connection.

Harbeth supplies two country-specific power cables approximately two metres long.

Plan Power Before Choosing the Final Position

A passive speaker only needs speaker cable.

The NLE-1 needs both an analogue signal connection and mains power at each loudspeaker position, so factor socket locations and cable routing into the system layout.

Rear Level Controls

Each NLE-1 has its own rear level control.

Harbeth recommends beginning with both controls at maximum.

For normal listening, system volume should then be controlled by the connected source or preamplifier.

Fine Stereo Balance Adjustment

The individual controls can be useful where the room causes the stereo image to pull slightly towards one side.

For example, if a centrally recorded vocal appears slightly left of centre, the left speaker can be reduced very slightly until the image is correctly centred.

Nelson Bass Extender Compatibility

The NLE-1 can also be partnered with the Harbeth Nelson Bass Extender for greater low-frequency extension.

Harbeth's NLE-1 manual states that when the balanced XLR connection is being used as the audio input, the unbalanced connector can be used as an output to a compatible Nelson arrangement.

Because Nelson connection variants and cabling have changed during its production life, confirm the exact connection required for the current products before ordering.

Why Add Nelson?

The NLE-1 itself is specified from 75Hz.

Nelson is designed specifically to supplement compact Harbeth and LS3/5A-style loudspeakers through the lower frequencies.

This allows a very small active monitor system to gain significantly greater bass extension without replacing the NLE-1 with a much larger speaker.

Speaker Placement

Harbeth emphasises careful placement because the interaction between a small monitor and the room has a large influence on tonal balance and stereo imaging.

Place each NLE-1 on a:

  • Flat surface
  • Stable surface
  • Suitable speaker stand or desktop support
  • Position free from objects directly obstructing the drivers

Aim the Speakers Towards Ear Height

Harbeth recommends orienting the NLE-1 vertically towards the listener's ears.

If the speaker sits above ear level, angle it slightly downwards.

If it sits below ear level, angle it upwards.

This is particularly relevant in desktop and studio installations.

Room Reflections

Hard walls, glass, bare floors and sparsely furnished rooms can increase reflected midrange and treble energy.

Harbeth recommends treating excessive reflections gradually rather than attempting to make the room completely dead.

Useful domestic absorption can include:

  • Rugs
  • Curtains
  • Soft furnishings
  • Dedicated acoustic panels

Nearfield Listening

The NLE-1 was designed with professional control-room use in mind and is particularly well suited to short listening distances.

Its compact dimensions also make it attractive for:

  • Desktop Hi-Fi
  • Home studios
  • Editing suites
  • Small listening rooms
  • Secondary music systems

Immersive and Multichannel Systems

Harbeth also positions the NLE-1 for larger immersive systems.

Because every speaker contains its own amplification and DSP, several NLE-1s can be deployed around a room where the upstream controller or studio system provides the required individual analogue channels and volume management.

No Built-In Streaming Platform

The NLE-1 should not be confused with an all-in-one wireless smart speaker.

Its published programme inputs are analogue XLR and unbalanced analogue.

Streaming functionality therefore comes from the connected streamer, DAC or preamplifier rather than from apps built directly into the speaker.

Active Does Not Mean Wireless

The left and right NLE-1 speakers are not wirelessly linked to one another.

Each speaker requires:

  • Its corresponding analogue audio channel
  • Its own mains power connection

Front Plates

Each NLE-1 is supplied with a removable front plate.

Harbeth recommends placing the speaker on a stable surface before fitting it and advises against repeatedly removing and reinstalling the plate because this can eventually create wear marks in the painted cabinet finish.

Cabinet Care

The painted NLE-1 cabinet can be cleaned occasionally with a lightly damp microfibre cloth using a dilute detergent appropriate for painted surfaces.

Avoid:

  • Direct prolonged sunlight
  • Radiators
  • Strong draughts
  • Smoke
  • Ozone
  • Harsh chemicals

Do Not Touch the Tweeter

Harbeth advises against physically cleaning the tweeter diaphragm.

If the bass/mid driver requires dust removal, use a photographer's air brush rather than wiping the cone with a cloth.

Seven Finish Options

The NLE-1 breaks visually from Harbeth's traditional real-wood-veneer speakers and is offered in a selection of painted contemporary finishes:

  • Satin Black
  • Satin White
  • Titanium Grey
  • Ivory Sand
  • Midnight Blue
  • Racing Green
  • Crimson Red

Not every finish is necessarily available in every country at all times.

Ivory Sand, Not Ivory Grey

Harbeth's official current finish name is Ivory Sand.

If the Audio T product selector still shows Ivory Grey, this should be updated to match Harbeth's official nomenclature.

Compact Dimensions

Each NLE-1 measures approximately:

  • Height: 275mm
  • Width: 166mm
  • Depth: 230mm

The compact cabinet makes the NLE-1 considerably easier to accommodate than Harbeth's conventional large standmount designs.

7.6kg Per Speaker

Despite its small dimensions, each NLE-1 weighs approximately 7.6kg without packaging.

This reflects the additional internal electronics, amplification and power hardware not present in a similarly sized passive loudspeaker.

Use stands or desktop supports capable of carrying the speakers securely.

NLE-1 Versus a Passive Harbeth

Traditional Passive Harbeth

  • Requires external power amplification
  • Passive crossover
  • Speaker cable connection
  • Amplifier choice affects the complete system
  • Traditional Harbeth veneer finishes
  • Wide choice of external electronics

Harbeth NLE-1

  • Amplification built into each speaker
  • DSP active crossover
  • Dedicated amplifier per driver
  • Balanced and unbalanced analogue inputs
  • Three DSP Personality modes
  • Seven painted finishes
  • Requires source-level volume control

Do I Need an Integrated Amplifier?

No.

Using a conventional integrated amplifier's powered speaker outputs would be inappropriate because the NLE-1 already contains its own amplification.

Instead, use an appropriate line-level preamplifier or variable-output source.

Never Connect Speaker-Level Amplifier Outputs to the NLE-1 Audio Inputs

The NLE-1 expects line-level analogue audio.

Do not connect the powered loudspeaker terminals of a conventional integrated or power amplifier to its XLR or unbalanced input.

What Makes a Good NLE-1 System?

Because amplification is already built into the speakers, system budget can be concentrated on:

  • Source quality
  • DAC quality
  • Pre-amplification
  • Streaming platform
  • Phono stage where required
  • Speaker positioning
  • Suitable stands

Who Is the NLE-1 For?

Well Suited To

  • Compact active Hi-Fi systems
  • Small listening rooms
  • Desktop systems
  • Nearfield listening
  • Home studios
  • Professional control rooms
  • Immersive audio systems
  • Streamer and active-speaker systems
  • Balanced preamplifiers
  • Listeners wanting fewer separate boxes
  • Systems where near-wall placement is unavoidable

Check Before Buying

  • No conventional power amplifier is required
  • Do not connect speaker-level amplifier outputs
  • Source should ideally provide master volume control
  • RCA connection is not a built-in cartridge phono stage
  • Each speaker requires mains power
  • Each speaker requires its own analogue signal feed
  • 75Hz published lower-frequency limit
  • Extended Bass mode reduces maximum available loudness
  • No published alternate ±3dB bass figure for Extended Bass mode
  • Nelson may be useful where substantially deeper bass is required

Key Features

  • Harbeth NLE-1
  • The New Listening Experience
  • Fully active loudspeaker
  • Two-way design
  • 110mm Harbeth-made RADIAL driver
  • 19mm ferrofluid-cooled tweeter
  • Internal DSP
  • Active DSP crossover
  • Dedicated amplification per driver
  • 2 x 50W Class-D amplification per speaker
  • Ultra-low-distortion amplifier design
  • High damping factor
  • 75Hz–20kHz ±3dB free-space
  • Balanced XLR analogue input
  • Unbalanced analogue input
  • More sensitive unbalanced input
  • Rear level control per speaker
  • Default Personality mode
  • Extended Bass Personality mode
  • Near-wall/Desktop Personality mode
  • Nelson bass-extender integration
  • 60mW published idle consumption
  • 50W published maximum power consumption
  • 275mm height
  • 166mm width
  • 230mm depth
  • 7.6kg per speaker
  • Removable front plate
  • Two 2m mains cables supplied
  • Satin Black
  • Satin White
  • Titanium Grey
  • Ivory Sand
  • Midnight Blue
  • Racing Green
  • Crimson Red
  • Designed and handmade in the UK

Frequently Asked Questions

What does NLE stand for?

The New Listening Experience.

Is the Harbeth NLE-1 active?

Yes. Each speaker contains its own DSP crossover and dedicated Class-D amplification.

Do I need a power amplifier?

No. Power amplification is built into each NLE-1.

Can I connect the speaker outputs of my integrated amplifier?

No. The NLE-1 accepts line-level analogue signals rather than amplified speaker-level outputs.

How many amplifiers are inside each speaker?

Harbeth specifies a pair of dedicated 50W Class-D amplifier channels, with the bass/mid and tweeter individually powered.

Does that mean each pair has four amplifier channels?

Yes. Each loudspeaker actively drives its two drive units independently.

What bass/mid driver does it use?

A 110mm Harbeth-made RADIAL driver.

Is that RADIAL4?

Harbeth's current NLE-1 specification calls it RADIAL rather than RADIAL4, so Audio T does not apply the RADIAL4 designation to this model.

What tweeter does it use?

A 19mm ferrofluid-cooled tweeter.

What is the frequency response?

Harbeth specifies 75Hz to 20kHz ±3dB in free space.

Does it have DSP?

Yes. DSP controls the active crossover and the speaker's three Personality modes.

What is the Personality Switch?

A three-position DSP control providing Default, Extended Bass and Near-wall/Desktop response options.

What is Default mode?

Harbeth's reference starting point for normal listening with the speakers positioned away from the walls.

What does Extended Bass do?

It provides deeper low-frequency output and makes the speaker sound subjectively larger, although maximum available playback level is reduced.

How low does Extended Bass mode go?

Harbeth does not publish a separate ±3dB lower-frequency specification for the Extended Bass setting.

What does Near-wall/Desktop mode do?

It reduces lower-midrange and bass output to compensate for the acoustic reinforcement that occurs when the NLE-1 is positioned close to walls or on a desktop.

Can I use the NLE-1 on a desk?

Yes. Harbeth specifically provides a Near-wall/Desktop mode for this type of installation.

Can I use the NLE-1 on speaker stands?

Yes. Use stable stands that allow the speaker to be aimed appropriately towards seated ear height.

Does it have XLR?

Yes. Each speaker has a balanced analogue XLR input.

Does it have RCA?

Yes. An unbalanced analogue input is also provided.

Is the RCA input a built-in phono stage?

No. A turntable requires appropriate phono amplification before its signal reaches the NLE-1.

Can I plug my turntable directly into it?

Only if the turntable provides the required built-in phono preamplification and suitable volume control. A normal cartridge output cannot be connected directly.

Can I connect a streamer directly?

Yes, if the streamer provides suitable variable analogue outputs.

Can I connect a DAC directly?

Yes, provided the DAC offers appropriate analogue output and preferably volume control.

Can I use a fixed-output DAC?

A separate preamplifier or suitable volume controller is preferable because Harbeth recommends controlling normal system volume upstream of the speakers.

Can I connect a preamplifier?

Yes. A preamplifier with suitable analogue outputs is an ideal partner.

Can I connect XLR and RCA sources at the same time?

Harbeth says not to use both as programme inputs simultaneously.

What are the rear volume controls for?

Harbeth recommends starting them at maximum and using them primarily for fine balance trimming between left and right speakers.

Why shouldn't I use the rear controls as my everyday volume control?

Harbeth advises controlling the source level instead because feeding an unnecessarily high signal into the NLE-1 can overload its internal analogue-to-digital converter even if the speaker's output level has subsequently been turned down.

Does each speaker need mains power?

Yes.

Are power cables supplied?

Yes. Harbeth specifies two approximately 2m country-specific mains cables with the pair.

Are the left and right speakers wirelessly connected?

No. Each speaker receives its own analogue audio channel.

Does it have Bluetooth?

Harbeth's published NLE-1 audio inputs are balanced XLR and unbalanced analogue. Bluetooth is not listed as a programme input.

Does it have Wi-Fi or built-in streaming?

No built-in consumer streaming platform is specified. Use an external streamer or preamplifier.

Can it work with the Harbeth Nelson?

Yes. Harbeth's NLE-1 manual specifically describes Nelson integration when the balanced input is being used.

Why add a Nelson?

The NLE-1 is specified from 75Hz. Nelson can provide substantially deeper low-frequency extension where required.

Can I add another brand of subwoofer?

Potentially, depending on the available outputs and bass-management arrangement in your preamplifier or source. Correct crossover and level integration will be important.

Is it suitable for a studio?

Yes. Harbeth specifically developed the NLE-1 for critical monitoring as well as domestic listening.

Is it suitable for nearfield listening?

Yes. Its compact dimensions and position-compensation options make it particularly well suited to shorter listening distances.

Can it be used in an immersive system?

Yes. Harbeth positions the NLE-1 for larger immersive installations where multiple compact active monitors are required.

How large is each speaker?

Approximately 275 x 166 x 230mm H x W x D.

How much does each NLE-1 weigh?

Approximately 7.6kg without packaging.

How much power does it consume?

Harbeth publishes approximately 60mW idle consumption and 50W maximum power consumption per loudspeaker.

Are the front plates removable?

Yes, although Harbeth recommends against repeatedly removing them because this can eventually mark the painted finish.

What finishes are available?

Satin Black, Satin White, Titanium Grey, Ivory Sand, Midnight Blue, Racing Green and Crimson Red.

Is Ivory Grey an official Harbeth finish?

No. Harbeth's official current name is Ivory Sand.

Where are the NLE-1 speakers made?

Harbeth describes them as designed and handmade in the UK.

What warranty does the NLE-1 have?

Harbeth provides a one-year manufacturer warranty as standard. Extended registration is available to eligible first owners, but Harbeth's current general warranty page and the NLE product-specific safety documentation publish different extended periods for powered speakers, so confirm the applicable NLE-1 extension with Audio T or Harbeth when purchasing.

Related Harbeth Products and Audio T Guides

Why Buy From Audio T?

  • Harbeth NLE-1 demonstrations
  • Active and passive Harbeth comparisons
  • Streamer and preamplifier matching
  • Balanced XLR system advice
  • Turntable and phono-stage matching
  • Source-level volume setup
  • Personality Mode setup
  • Desktop and near-wall positioning
  • Speaker stand advice
  • Nelson bass-extender integration
  • Subwoofer integration
  • Studio and nearfield setup
  • Home demonstrations where available
  • Part-exchange options
  • Ongoing setup and after-sales support

The NLE-1 is currently available for demonstration through Audio T Bristol and Southampton.

Contact Audio T to arrange a Harbeth NLE-1 demonstration or discuss sources, preamplification, positioning, stands and bass extension.

Core Specification

  • Product type: Active DSP loudspeaker
  • Model: Harbeth NLE-1
  • NLE: The New Listening Experience
  • Configuration: Two-way active
  • Internal crossover: DSP active crossover
  • Supplied as: Pair
  • Designed and handmade: UK

Drive Units

  • Bass / midrange: 1 x 110mm Harbeth-made RADIAL drive unit per speaker
  • Tweeter: 1 x 19mm ferrofluid-cooled tweeter per speaker
  • RADIAL generation: Harbeth currently specifies RADIAL without an XD2 / RADIAL4 designation

Amplification

  • Amplifier topology: Class D
  • Amplifier channels: 2 per speaker
  • Bass / mid amplifier: 50W
  • Tweeter amplifier: 50W
  • Amplification: Dedicated amplifier channel for each driver
  • Manufacturer description: Ultra-low distortion, high damping factor
  • External power amplifier required: No

DSP

  • Digital Signal Processing: Yes
  • Crossover: DSP controlled
  • Driver integration: DSP controlled
  • Personality modes: 3

Personality Modes

  • Default: Reference tonal balance for conventional positioning away from walls
  • Extended Bass: Increased low-frequency extension / weight
  • Extended Bass trade-off: Reduced maximum available loudness
  • Near-wall / Desktop: Reduced lower-midrange and bass output to compensate for boundary reinforcement
  • Alternate Extended Bass frequency specification: Not published by Harbeth

Frequency Response

  • Frequency range: 75Hz – 20kHz ±3dB
  • Measurement condition: Free space

Analogue Inputs

  • Balanced input: XLR
  • Unbalanced input: RCA / phono-format analogue input
  • Input type: Line level
  • Unbalanced input sensitivity: Higher than XLR according to Harbeth
  • Use both programme inputs simultaneously: No

Turntable Compatibility

  • Built-in moving-magnet phono stage: No
  • Built-in moving-coil phono stage: No
  • Turntable requirement: Built-in phono preamp and volume control, or suitable external phono / preamplifier system
  • Direct cartridge connection: Not suitable

Source Requirements

  • Recommended signal: Variable line-level analogue
  • Streamer: Compatible with suitable variable analogue output
  • DAC: Compatible with suitable variable analogue output
  • Pre-amplifier: Compatible
  • CD player: Compatible when appropriate level control is available
  • Studio equipment: Compatible through suitable analogue outputs

Level Controls

  • Control: Independent rear level control per speaker
  • Harbeth recommended starting point: Maximum on both speakers
  • Normal master volume: Adjust from source / preamplifier
  • Rear speaker controls: Useful for fine left / right balance correction
  • High fixed-level input: Avoid because internal ADC overload is possible

Harbeth Nelson Integration

  • Nelson bass extender: Supported according to NLE-1 manual
  • Connection arrangement: When XLR is used as programme input, Harbeth states that the unbalanced connector can serve as a Nelson output
  • Recommendation: Confirm current Nelson version and required cable with Audio T before purchase

Power

  • Mains connection: Required for each loudspeaker
  • Power cables supplied: 2
  • Supplied cable length: Approximately 2m each
  • Power consumption - idle: Approximately 60mW
  • Power consumption - maximum: Approximately 50W

Placement

  • Support: Flat, stable surface
  • Speaker stands: Suitable
  • Desktop use: Suitable
  • Near-wall use: Dedicated DSP mode provided
  • Vertical listening angle: Aim speaker towards listener's ear level
  • Speaker above listener: Angle downwards
  • Speaker below listener: Angle upwards

Front Plate

  • Front plates supplied: 2
  • Removable: Yes
  • Harbeth guidance: Avoid frequent removal to reduce risk of wear marks on painted finish

Dimensions

  • Height: 275mm
  • Width: 166mm
  • Depth: 230mm
  • Dimensions: 275 x 166 x 230mm H x W x D

Weight

  • Net weight: Approximately 7.6kg each
  • Packed weight: Approximately 11.2kg each according to Harbeth's product specification

Finish Options

  • Satin Black: Available
  • Satin White: Available
  • Titanium Grey: Available
  • Ivory Sand: Available
  • Midnight Blue: Available
  • Racing Green: Available
  • Crimson Red: Available
  • Availability: Not all finishes may be available in every country

Current Audio T Finish Correction

  • Audio T currently lists: Ivory Grey
  • Official Harbeth finish name: Ivory Sand
  • Recommended action: Rename option to Ivory Sand

Supplied Accessories

  • NLE-1 loudspeakers: 2
  • Front plates: 2
  • Power cables: 2, approximately 2m each
  • User Manual: Included
  • Safety Information: Included
  • Ownership Certificate: Included

Care and Safety

  • Cabinet cleaning: Lightly damp microfibre cloth with suitable dilute detergent
  • Direct sunlight: Avoid prolonged exposure
  • Radiators / heat sources: Avoid
  • Smoke and ozone: Avoid
  • Bass / mid driver: Use photographer's air brush if cleaning is required
  • Tweeter: Do not physically clean
  • Internal servicing: No user-serviceable parts
  • Modification: Not permitted without Harbeth approval

Warranty

  • Standard manufacturer warranty: 1 year
  • Extended registration: Available to eligible original owners when registered within 14 days
  • Current published-duration discrepancy: Harbeth's generic warranty page states 60 months, while its NLE-specific safety documentation states 2 years for powered loudspeakers
  • Recommendation: Confirm the current NLE-1 extended warranty term with Audio T / Harbeth at purchase
  • Transferability: Extended cover is for the eligible original owner
  • Proof of purchase: Required

Audio T Demonstration

  • Current demonstration stores: Bristol and Southampton
  • Recommendation: Contact the store before travelling to confirm current finish and demonstration availability