Harbeth Monitor 40.5 XD2 Standmount Speakers | Audio T
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Harbeth Monitor 40.5 XD2 Standmount Speakers - Pair

Harbeth Monitor 40.5 XD2 Standmount Speakers - Pair

Audio T Verdict

The Harbeth Monitor 40.5 XD2 sits at the top of Harbeth's passive loudspeaker range and is a very different proposition from simply taking one of the company's smaller two-way monitors and making the cabinet larger.

It is a genuine three-way design. A substantial 300mm Harbeth-made bass driver handles the low frequencies, allowing the separate 200mm RADIAL4 unit to concentrate on the midrange before handing over to a 25mm ferrofluid-cooled tweeter.

That division of labour matters. Voices and the majority of instrumental fundamentals can be reproduced by a dedicated RADIAL4 midrange driver without asking the same cone to produce the lowest bass at the same time. The large 300mm driver can then concentrate on giving the Monitor 40.5 XD2 the scale and 35Hz quoted bass extension that distinguish it from the smaller Harbeth models.

XD2 brings Harbeth's latest RADIAL4 midrange technology together with a refined crossover designed to improve integration between bass, midrange and treble. Harbeth retains the relatively benign electrical characteristics familiar from the rest of the range, quoting 6–8 ohms and 86dB sensitivity.

Despite its size, Harbeth describes the Monitor 40.5 XD2 as easy to drive and suggests amplification from 35 watts per channel. That does not mean amplifier choice becomes irrelevant. A speaker capable of this degree of scale will benefit from clean power and useful headroom in a larger room, but there is no requirement to choose an amplifier purely because it carries an enormous wattage figure.

Harbeth's 650W programme rating can look startling next to the 150W rating of the smaller XD2 models, but it is a programme rather than continuous power specification. It describes the loudspeaker's ability to handle dynamic musical material and should not be read as either a minimum amplifier requirement or permission to run hundreds of continuous watts into the speakers.

Physical installation deserves just as much attention as amplifier choice. At 750mm high and 432mm wide, these are exceptionally large standmount speakers. Harbeth specifically recommends positioning them away from surrounding surfaces and using stable stands that bring the tweeters, positioned 660mm above the cabinet base, towards seated ear height.

The result is a loudspeaker intended for listeners who want the full-scale Harbeth Monitor experience: deep bass, dedicated midrange reproduction and the ability to reproduce everything from intimate vocals to large orchestral or rock recordings without abandoning the natural tonal balance that defines the range.

Harbeth Monitor 40.5 XD2 Standmount Speakers

The Monitor 40.5 XD2 is Harbeth's flagship passive loudspeaker and the largest model in the current XD2 collection.

Its three-way driver system comprises:

  • 300mm Harbeth-made bass driver
  • 200mm Harbeth-made RADIAL4 midrange driver
  • 25mm ferrofluid-cooled tweeter

Key features include:

  • Three-way standmount design
  • Dedicated 300mm bass driver
  • Dedicated 200mm RADIAL4 midrange driver
  • 25mm ferrofluid-cooled tweeter
  • Refined XD2 crossover
  • 35Hz to 20kHz ±3dB free-space response
  • Smooth off-axis response
  • 6–8-ohm impedance
  • 86dB/2.83V/1m sensitivity
  • Amplification suggested from 35W per channel
  • 650W programme power handling
  • Single-wire 4mm binding posts
  • Designed for placement in free space away from walls
  • Tweeter approximately 660mm above cabinet base
  • Stand mounting required
  • Handmade cabinet
  • Designed and handmade in the UK

The Flagship Harbeth Passive Loudspeaker

The Monitor 40 lineage represents the largest conventional passive loudspeaker in Harbeth's range.

Where the P3ESR XD2, C7ES-3 XD2 and M30.3 XD2 use two-way configurations, and the SHL5plus XD2 supplements its main two-way arrangement with a SuperTweeter, the Monitor 40.5 XD2 uses separate bass, midrange and treble drivers.

That makes it a fundamentally different design rather than simply a larger version of the M30.3.

Three-Way Architecture

A three-way loudspeaker divides the audible spectrum across three separate driver sections.

In the Monitor 40.5 XD2:

  • The 300mm driver handles bass
  • The 200mm RADIAL4 driver handles the midrange
  • The 25mm tweeter handles high frequencies

This allows each drive unit to operate over a more specialised portion of the frequency range.

Why Use a Dedicated Bass Driver?

Producing deep bass requires relatively large movements of air.

A large 300mm cone provides substantially more radiating area than the 200mm drivers used throughout much of the rest of the Harbeth range.

That additional area helps the Monitor 40.5 XD2 reproduce:

  • Large orchestral scale
  • Bass guitar
  • Kick drum
  • Double bass
  • Synthesised bass
  • Pipe-organ fundamentals
  • Low-frequency ambience contained within recordings

300mm Harbeth-Made Bass Driver

The bass driver is manufactured by Harbeth and measures approximately 300mm.

The Bass Driver Is Not Listed as RADIAL4

Harbeth specifically identifies the 200mm midrange driver as RADIAL4.

The current manufacturer specification describes the 300mm unit as a Harbeth-made bass driver without applying the RADIAL4 designation to it.

We therefore would not describe both cone drivers as RADIAL4 unless Harbeth changes its published specification.

200mm RADIAL4 Midrange Driver

The dedicated midrange driver uses Harbeth's latest-generation RADIAL4 cone technology.

RADIAL is Harbeth's proprietary diaphragm technology and derives its name from:

Research And Development In Advanced Loudspeakers.

Because the 200mm unit does not have to reproduce the deepest bass in the Monitor 40.5 XD2, it can concentrate on the musically critical midrange.

Why the Midrange Matters

A large proportion of recognisable musical information sits through the midband.

This includes much of the energy produced by:

  • Human voices
  • Piano
  • Guitar
  • Strings
  • Woodwind
  • Brass
  • Percussion

A dedicated midrange driver therefore plays a major role in the Monitor 40.5 XD2's overall presentation.

25mm Ferrofluid-Cooled Tweeter

A 25mm ferrofluid-cooled tweeter handles the highest frequencies.

Ferrofluid assists with thermal management and damping within the tweeter's magnetic gap.

The crossover integrates it with the RADIAL4 midrange unit to maintain Harbeth's specified smooth off-axis response.

No Separate SuperTweeter

The Monitor 40.5 XD2 should not be confused with the SHL5plus XD2's driver arrangement.

The M40.5 uses:

  • 300mm bass driver
  • 200mm midrange driver
  • 25mm tweeter

There is no additional 20mm SuperTweeter.

RADIAL4 and XD2

The move to RADIAL4 is one of the defining developments of Harbeth's current XD2 generation.

Harbeth's continuing research into cone materials focuses on controlling the resonant behaviour of the diaphragm so that the cone contributes as little unwanted character as possible to the reproduced sound.

Refined XD2 Crossover

The three-way crossover is especially important in the Monitor 40.5 XD2 because it must integrate three separate drive units.

Harbeth states that its revised XD2 crossover improves integration between bass, midrange and treble.

The network has to manage:

  • Frequency division
  • Driver level
  • Phase relationships
  • On-axis response
  • Off-axis behaviour
  • Electrical impedance

35Hz to 20kHz Frequency Range

Harbeth specifies:

35Hz – 20kHz ±3dB in free space with the grille fitted.

This gives the Monitor 40.5 XD2 the deepest quoted bass extension of Harbeth's current passive XD2 range.

35Hz Is a Properly Qualified Specification

The ±3dB tolerance and free-space measurement condition matter.

Once the speakers are installed in a room, walls, floor, ceiling and room modes will alter the low-frequency response heard at the listening position.

Do You Need a Subwoofer?

For most music systems, probably not.

A free-space lower limit of 35Hz gives the Monitor 40.5 XD2 substantial low-frequency extension in its own right.

A subwoofer can still be useful where:

  • Home cinema is part of the system
  • True infrasonic extension is required
  • Room-mode control using multiple bass sources is desired
  • Electronic or organ music demands output well below 35Hz

Any subwoofer used at this level should be integrated carefully rather than simply added for more bass.

86dB Sensitivity

Sensitivity is specified at 86dB/2.83V/1m on axis.

That is moderate rather than exceptionally high sensitivity.

It means amplifier headroom remains useful in a larger room even though the electrical impedance itself is relatively friendly.

6–8-Ohm Impedance

Harbeth specifies the Monitor 40.5 XD2 at 6–8 ohms and describes it as easy to drive.

This makes it suitable for a broad range of quality amplification rather than requiring an unusually low-impedance specialist amplifier.

Suggested Amplification From 35W Per Channel

Harbeth suggests amplifiers from approximately 35 watts per channel.

That may sound surprisingly modest for a speaker of this physical size, but loudspeaker dimensions alone do not determine amplifier difficulty.

The amount of power required in practice depends on:

  • Room size
  • Listening distance
  • Playback level
  • Programme dynamics
  • Room absorption
  • Available amplifier headroom

Harbeth's General Amplifier Advice

Harbeth's user guidance suggests that around 45W into 8 ohms per channel can be a sensible choice for normal domestic daytime listening.

For larger rooms and louder musical peaks, approximately 100W into 8 ohms provides useful additional reserve.

These are general guidelines rather than strict requirements for the Monitor 40.5 XD2.

650W Programme Power Handling

The Monitor 40.5 XD2 carries an unusually high published programme rating of 650 watts.

The word programme is crucial.

Music is constantly changing in level. A programme rating therefore describes handling of dynamic musical material and is not equivalent to a continuous sine-wave rating.

650W Is Not a Recommended Amplifier Size

You do not need a 650W amplifier to drive the Monitor 40.5 XD2.

Harbeth itself suggests amplification from 35W/channel.

Likewise, the programme rating should never be used as justification for operating any system at obviously distorted or mechanically stressful levels.

Avoid Amplifier Clipping

A lower-powered amplifier driven beyond its clean output capability can clip the signal.

If the system begins to sound harsh, compressed or distorted, reduce the volume.

Clean amplifier headroom is preferable to simply choosing a large published wattage figure.

Solid-State Amplification

Harbeth designs its passive speakers to present an easy load to solid-state amplification.

Suitable integrated amplifiers, pre/power systems and high-quality streaming amplifiers can therefore all be considered.

Valve Amplification

Valve amplifiers can also be considered, although Harbeth notes that their behaviour can be more dependent on the electrical characteristics of the connected loudspeaker.

Compatibility should therefore be assessed using the particular amplifier rather than assuming every valve design will produce identical results.

Single-Wire Connection

The Monitor 40.5 XD2 uses Harbeth-branded 4mm binding posts.

As with the rest of the current passive range, connection is deliberately straightforward:

  • One positive terminal per speaker
  • One negative terminal per speaker
  • No bi-wire links
  • No passive bi-amping terminals

Correct Polarity Matters

Connect:

  • Amplifier positive to speaker positive
  • Amplifier negative to speaker negative

Both speakers must retain the same electrical polarity for correct bass performance and stereo imaging.

These Really Are Standmount Speakers

Despite measuring 750mm high, Harbeth officially describes the Monitor 40.5 XD2 as a standmount loudspeaker.

That does not mean placing it on a conventional tall speaker stand.

The tweeter is already approximately 660mm above the cabinet base, so the required stand is normally much shorter than one used with the P3ESR or M30.3.

Tweeter 660mm Above the Cabinet Base

Harbeth recommends positioning the loudspeaker so that the tweeter sits approximately level with the listener's ears.

Stand height should therefore be calculated from:

  • Your normal seated ear height
  • The speaker's 660mm tweeter height
  • The thickness of any stand interface

Use Properly Stable Stands

The Monitor 40.5 XD2 is extremely substantial and needs stands with an adequately sized top plate and excellent stability.

Harbeth recommends non-resonant stand construction and specifically warns that the Monitor 40 models are very heavy.

Two-Person Unpacking Recommended

Harbeth specifically recommends that Monitor 40 loudspeakers are unpacked in the room where they will be used, with two people working together.

Remove belts, watches or jewellery that could scratch the veneer and take care around the staples in the shipping carton.

Speaker-to-Stand Interface

Harbeth recommends felt or rubber dots between the bottom of the loudspeaker and the stand.

If Blu-Tack or a similar product is used, Harbeth advises using only the smallest amount because it can bond strongly to natural veneer.

Do Not Bolt or Permanently Bond the Cabinet Down

The objective is a stable and reversible interface.

There is no need to permanently attach the cabinet to the stand or use large quantities of adhesive material.

Ideally Positioned in Free Space

Harbeth describes the Monitor 40.5 XD2 as ideally used in free space away from walls.

With bass extension reaching to 35Hz, room boundaries can have a considerable effect on the tonal balance.

Why Rear-Wall Distance Matters

Moving a speaker towards a room boundary increases acoustic reinforcement through parts of the low-frequency and lower-midrange region.

With the Monitor 40.5 XD2, excessive boundary reinforcement can make the presentation heavier or less clearly defined than intended.

Start with meaningful space around the cabinets and adjust from there.

Keep Them Out of Corners

A corner couples a loudspeaker simultaneously to several room boundaries.

That can produce very strong bass reinforcement and excite room resonances.

The Monitor 40.5 XD2 is not a speaker that requires corner loading to generate weight.

Room Acoustics Matter

At this level, a change in room treatment or speaker position can make a bigger difference than changing a cable or accessory.

Harbeth suggests practical acoustic treatments including:

  • Curtains
  • Rugs
  • Carpets
  • Bookcases
  • Selective absorption

The objective is not to make the room completely dead, but to control excessive reflections and problematic resonances.

Toe-In

Harbeth does not prescribe one mandatory toe-in angle.

Some listeners prefer a few degrees of toe-in, while others favour a more forward-facing arrangement.

Changing toe-in alters the balance between direct high-frequency energy and reflections arriving from the side walls.

Grilles On for Listening

Harbeth specifies the Monitor 40.5 XD2's 35Hz–20kHz response with the protective grille fitted.

The company's general user guide also recommends listening with the grilles in place.

They should therefore be regarded as part of the intended operating configuration rather than merely optional cosmetic covers.

Take Care With the Grilles

The steel-frame grilles fit closely into the cabinet.

When removing them:

  • Do not press against the drive units
  • Do not lever against the veneer
  • Avoid pulling aggressively on the cloth
  • Use Harbeth's magnetic grille puller or suitable strong magnets where necessary

Driver Care

Do not touch or wipe the tweeter diaphragm.

If the bass driver ever requires dust removal, Harbeth recommends a photographer's air brush rather than wiping the cone with a cloth.

Handmade Veneered Cabinets

Harbeth builds the Monitor 40.5 XD2 cabinets by hand and offers a range of natural finishes.

Current manufacturer options include:

  • Black Ash
  • Cherry
  • Walnut
  • Oak
  • Rosewood

Natural Veneer Will Vary

Real wood varies naturally in:

  • Grain structure
  • Colour
  • Shade
  • Pattern

Veneer can also mature in colour over time.

Protect the Cabinet

Harbeth advises keeping natural veneer away from:

  • Prolonged direct sunlight
  • Radiators
  • Strong draughts
  • Smoke
  • Ozone
  • Harsh chemicals

Dimensions

Each Monitor 40.5 XD2 cabinet measures approximately:

  • Height: 750mm
  • Width: 432mm
  • Cabinet depth: 388mm

Harbeth advises allowing approximately another 12mm for the front grille and rear binding posts.

Total installed depth is therefore approximately 400mm before allowing space for speaker cable and room positioning.

A Very Large Standmount

The Monitor 40.5 XD2 occupies considerably more physical space than a typical standmount loudspeaker.

Before ordering, check:

  • Available cabinet width
  • Speaker-to-wall clearance
  • Stand footprint
  • Listening distance
  • Door and access dimensions
  • Safe unpacking space

Plan the Installation Before Delivery

Harbeth's own user guide recommends unpacking Monitor 40 models in their final listening room with two people.

It is worth establishing speaker and stand positions before opening the cartons rather than repeatedly moving the cabinets afterwards.

Monitor 40.5 XD2 or M30.3 XD2?

M30.3 XD2

  • Two-way design
  • 200mm RADIAL4 bass/mid driver
  • 25mm tweeter
  • 50Hz–20kHz ±3dB
  • 85dB sensitivity
  • 6-ohm impedance
  • 25W/channel suggested minimum
  • 460mm cabinet height
  • Much easier to accommodate

Monitor 40.5 XD2

  • Three-way design
  • 300mm dedicated bass driver
  • 200mm RADIAL4 dedicated midrange
  • 25mm tweeter
  • 35Hz–20kHz ±3dB
  • 86dB sensitivity
  • 6–8-ohm impedance
  • 35W/channel suggested minimum
  • 750mm cabinet height
  • Considerably greater bass scale

Compare the Harbeth M30.3 XD2 at Audio T.

Monitor 40.5 XD2 or SHL5plus XD2?

SHL5plus XD2

  • 200mm RADIAL4 bass/mid driver
  • 25mm tweeter
  • 20mm SuperTweeter
  • 40Hz–20kHz ±3dB
  • 86dB sensitivity
  • 6-ohm impedance
  • 150W programme handling
  • 635mm cabinet height

Monitor 40.5 XD2

  • 300mm dedicated bass driver
  • 200mm RADIAL4 midrange
  • 25mm tweeter
  • 35Hz–20kHz ±3dB
  • 86dB sensitivity
  • 6–8-ohm impedance
  • 650W programme handling
  • 750mm cabinet height

The distinction is more than cabinet size. The SHL5plus XD2 uses a 200mm driver across bass and midrange and adds a SuperTweeter, while the Monitor 40.5 XD2 employs separate 300mm bass and 200mm midrange drivers in a true three-way arrangement.

Compare the Harbeth SHL5plus XD2 at Audio T.

Monitor 40.5 XD2 or C7ES-3 XD2?

The C7ES-3 XD2 remains a much more manageable proposition for customers who want the Harbeth character without committing the room space required by the Monitor 40.5.

The Monitor 40.5 is the choice where:

  • Greater bass extension matters
  • Large-scale music is frequently played
  • A dedicated midrange driver is desirable
  • The room can accommodate very large standmount speakers
  • The listening position allows them to breathe away from walls

Who Is the Monitor 40.5 XD2 For?

Well Suited To

  • Serious dedicated stereo systems
  • Medium to larger listening rooms
  • Listeners wanting full-scale Harbeth performance
  • Classical music
  • Large orchestral works
  • Jazz
  • Rock
  • Electronic music
  • Vocals and acoustic recordings
  • Systems where deep bass without a subwoofer is desirable
  • Solid-state amplification
  • Suitable valve amplification
  • Amplifiers from around 35W/channel upwards

Check Before Buying

  • Very large standmount cabinet
  • Requires strong, stable short stands
  • Two-person unpacking recommended
  • Needs meaningful space away from walls
  • 432mm cabinet width
  • Approximately 400mm total cabinet depth
  • 650W figure is programme handling, not required amplifier power
  • Single-wire terminals only
  • Natural veneer varies between pairs
  • Grilles are intended to remain fitted during listening

Key Features

  • Harbeth Monitor 40.5 XD2
  • Flagship passive XD2 model
  • Three-way standmount loudspeaker
  • 300mm Harbeth-made bass driver
  • 200mm Harbeth-made RADIAL4 midrange driver
  • 25mm ferrofluid-cooled tweeter
  • Refined XD2 crossover
  • 35Hz–20kHz ±3dB
  • Free-space response specification
  • Grille-on response specification
  • Smooth off-axis response
  • 6–8-ohm impedance
  • Easy amplifier load
  • 86dB/2.83V/1m sensitivity
  • Amplification suggested from 35W/channel
  • 650W programme handling
  • Single-wire connection
  • Harbeth 4mm binding posts
  • Ideally positioned in free space
  • Tweeter 660mm above cabinet base
  • Stand mounting required
  • 750mm height
  • 432mm width
  • 388mm cabinet depth
  • Approximately 400mm depth with grille and terminals
  • Two-person unpacking recommended
  • Handmade cabinet
  • Designed and handmade in the UK
  • Black Ash finish
  • Cherry finish
  • Walnut finish
  • Oak finish
  • Rosewood finish

Frequently Asked Questions

What is the correct product name?

Harbeth's current designation is Monitor 40.5 XD2, commonly shortened to M40.5 XD2.

Is it M40.5 XD or M40.5 XD2?

The current model is XD2. Some Harbeth and retailer body copy still contains shortened XD wording, but Harbeth's current range identifies the product as Monitor 40.5 XD2.

Is the Monitor 40.5 XD2 a three-way speaker?

Yes.

How many drivers does each speaker have?

Three: a 300mm bass driver, 200mm RADIAL4 midrange driver and 25mm tweeter.

Is the 300mm bass driver RADIAL4?

Harbeth does not describe it as RADIAL4 in the current specification. RADIAL4 is specifically applied to the 200mm midrange driver.

How large is the midrange driver?

200mm.

What is RADIAL4?

RADIAL4 is the current generation of Harbeth's proprietary cone technology used in the Monitor 40.5 XD2 midrange driver.

How large is the tweeter?

25mm.

Does the M40.5 XD2 use a SuperTweeter?

No. Its three drivers are bass, midrange and a single 25mm tweeter.

What is the frequency response?

Harbeth specifies 35Hz to 20kHz ±3dB in free space with the grille fitted.

Does it need a subwoofer?

Not for most music systems. The quoted 35Hz lower limit gives substantial bass extension, although a subwoofer can still be useful for home cinema or true sub-bass reproduction.

What is the impedance?

Harbeth specifies 6–8 ohms and describes it as an easy load.

What is the sensitivity?

86dB/2.83V/1m measured on axis.

What amplifier power does Harbeth recommend?

Harbeth suggests amplification from approximately 35 watts per channel.

Do I need a huge amplifier?

No. The electrical load is deliberately amplifier friendly. More clean power can provide useful headroom in a large room, but amplifier quality and system matching matter more than buying purely by wattage.

Why does it say 650W power handling?

650W is Harbeth's programme rating for dynamic musical material. It is not a recommended amplifier size or a continuous power requirement.

Is the 650W figure a typo?

No. Harbeth's current specification genuinely states 650W programme. The previous Audio T page simply displayed it incorrectly as “6 50W programme”.

Can I use a valve amplifier?

Potentially, yes. Harbeth recommends assessing valve amplifiers individually because their behaviour can depend more strongly on the connected loudspeaker load.

Can I use a Class D amplifier?

Yes, provided it is a competent design with suitable clean output for the room and listening level.

Can the Monitor 40.5 XD2 be bi-wired?

No. Harbeth provides a single pair of speaker terminals.

Does it need speaker stands?

Yes. Harbeth officially describes the Monitor 40.5 XD2 as a standmount loudspeaker.

Does it need tall stands?

No. The tweeter is already approximately 660mm above the bottom of the cabinet, so relatively short stands are normally appropriate.

What stand height should I use?

Choose a stable stand that brings the 660mm-high tweeter reasonably close to your seated ear height.

Does Harbeth recommend a particular stand manufacturer?

No. Concentrate on correct height, adequate top-plate size, stability and suitably non-resonant construction.

What should I put between the speaker and stand?

Harbeth recommends felt or rubber dots. If using Blu-Tack, use only a very small quantity.

Are these speakers heavy?

Yes. Harbeth specifically describes the Monitor 40 models as very heavy and recommends that two people unpack them in the room where they will be used.

Why isn't a weight stated here?

Harbeth's current public online specification does not publish a cabinet weight, so Audio T should avoid presenting an unverified third-party figure as a manufacturer specification.

Can they go against a wall?

Harbeth says the Monitor 40.5 XD2 is ideally used in free space away from walls.

How far from the rear wall?

There is no universal distance because room acoustics vary. Start with meaningful clearance and adjust while listening for bass definition, tonal balance and stereo imaging.

Should I toe them in?

Experiment. Harbeth notes that small amounts of toe-in alter the balance between direct and reflected mid/high-frequency energy.

Should the grilles stay on?

Yes for normal listening. Harbeth specifies the response with its protective grilles fitted and recommends using them that way.

Can the grilles be removed?

Yes, carefully. Harbeth offers a magnetic grille-puller tool and warns against touching the drive units or damaging the cabinet veneer.

Can I clean the tweeter?

No. Harbeth advises against physically cleaning the tweeter diaphragm.

How large is each speaker?

Approximately 750 x 432 x 388mm H x W x D for the cabinet.

How much extra depth should I allow?

Approximately 12mm for the grille and binding posts, plus additional space for speaker cable and room clearance.

What finishes are available?

Harbeth currently lists Black Ash, Cherry, Walnut, Oak and Rosewood.

Are they real wood veneers?

Yes. Natural differences in grain, colour and shade should be expected.

Where are they made?

Harbeth describes the Monitor 40.5 XD2 as designed and handmade in the UK.

How does it compare with the SHL5plus XD2?

The SHL5plus XD2 uses a 200mm RADIAL4 bass/mid driver, 25mm tweeter and 20mm SuperTweeter. The Monitor 40.5 XD2 instead uses separate 300mm bass and 200mm RADIAL4 midrange drivers with a 25mm tweeter, and reaches a quoted 35Hz rather than 40Hz.

How does it compare with the M30.3 XD2?

The M30.3 is a much smaller two-way speaker using one 200mm RADIAL4 bass/mid unit. The Monitor 40.5 adds a dedicated 300mm bass driver, offers considerably deeper bass and is designed for substantially greater scale.

What warranty does Harbeth provide?

New Harbeth loudspeakers carry a one-year manufacturer warranty. Eligible first original owners can extend this to 60 months by registering within 14 days of purchase, subject to Harbeth's current conditions.

Is the extended warranty transferable?

No. Harbeth states that the extended warranty is restricted to the eligible first original owner.

Related Harbeth Products and Audio T Guides

Why Buy From Audio T?

  • Harbeth demonstrations
  • Monitor 40.5 XD2 system matching
  • M30.3, SHL5plus and Monitor 40 comparisons
  • Amplifier matching
  • Valve, Class A/B and Class D amplifier advice
  • Speaker stand advice
  • Correct listening-height setup
  • Room-positioning guidance
  • Room acoustic advice
  • Speaker cable matching
  • Subwoofer integration where required
  • Delivery and installation planning
  • Home demonstrations where available
  • Part-exchange options
  • Setup and ongoing after-sales support

Contact Audio T to arrange a Harbeth Monitor 40.5 XD2 demonstration or discuss amplification, stands, room positioning and comparisons with the other Harbeth XD2 models.

Core Specification

  • Product type: Passive standmount loudspeaker
  • Model: Harbeth Monitor 40.5 XD2
  • Abbreviated model: M40.5 XD2
  • Generation: XD2
  • Configuration: Three-way, three-driver
  • Supplied as: Pair
  • Designed and handmade: UK

Drive Units

  • Bass: 1 x 300mm Harbeth-made bass driver
  • Midrange: 1 x 200mm Harbeth-made RADIAL4 driver
  • Tweeter: 1 x 25mm ferrofluid-cooled tweeter
  • RADIAL4 application: 200mm midrange driver
  • SuperTweeter: None

XD2 Developments

  • Midrange cone generation: RADIAL4
  • Crossover: Newly refined XD2 three-way crossover
  • Previous generation: Monitor 40.3 XD

Frequency Response

  • Frequency range: 35Hz – 20kHz ±3dB
  • Measurement condition: Free space
  • Grille: Fitted during specified measurement
  • Off-axis response: Smooth

Electrical Specification

  • Impedance: 6–8 ohms
  • Electrical load: Described by Harbeth as easy to drive
  • Sensitivity: 86dB/2.83V/1m axial
  • Suggested amplifier power: From 35W per channel
  • Power handling: 650W programme

Power Handling Note

  • 650W rating: Programme power handling
  • Continuous rating: Not specified as 650W continuous
  • Amplifier requirement: 650W amplifier not required
  • Manufacturer amplifier suggestion: From 35W/channel

General Harbeth Amplifier Guidance

  • Typical domestic listening: Approximately 45W into 8 ohms per channel is suggested by Harbeth as a general guide
  • Larger rooms / greater headroom: Approximately 100W into 8 ohms can provide useful reserve
  • Actual requirement: Depends on room size, listening distance and playback level
  • Solid-state amplifiers: Suitable
  • Valve amplifiers: Compatibility should be assessed with the individual amplifier

Connections

  • Terminals: Harbeth-branded 4mm binding posts
  • Connection: Single wire
  • Bi-wire: No
  • Passive bi-amp: No separate HF / MF / LF terminals

Placement

  • Manufacturer guidance: Ideally used in free space away from walls
  • Stand mounting: Required
  • Tweeter position: Approximately 660mm above cabinet base
  • Reference axis: Ideally with listener's ears near tweeter height
  • Toe-in: Adjust according to room and preference
  • Corner placement: Generally best avoided where possible

Stand Guidance

  • Construction: Stable, suitably non-resonant stand
  • Top plate: Must be adequately large for the cabinet
  • Speaker / stand interface: Felt or rubber dots recommended by Harbeth
  • Blu-Tack: Use only a minimal amount if required
  • Stand height: Select according to seated ear height and 660mm tweeter position
  • Specific stand manufacturer: Harbeth does not nominate one brand

Handling

  • Manufacturer warning: Monitor 40 models are very heavy
  • Unpacking: Two people recommended
  • Recommended unpacking location: Final listening room
  • Jewellery / belts: Remove before handling to reduce risk of veneer damage

Grilles

  • Protective grille: Fitted
  • Specified frequency response: Grille on
  • Harbeth listening recommendation: Grille fitted
  • Grille removal: Take care not to mark cabinet or touch drive units
  • Grille removal tool: Magnetic Harbeth grille puller available separately

Dimensions

  • Height: 750mm
  • Width: 432mm
  • Cabinet depth: 388mm
  • Additional depth: Approximately 12mm for grille and binding posts
  • Approximate total depth: 400mm before cable and room clearance

Weight

  • Official current Harbeth online specification: Weight not published
  • Handling guidance: Harbeth explicitly describes Monitor 40 models as very heavy and recommends two-person unpacking

Finish Options

  • Black Ash: Satin
  • Cherry: Available
  • Walnut: Available
  • Oak: Available
  • Rosewood: Available
  • Availability: May vary by market and current production

Cabinet

  • Construction: Handmade
  • Veneers: Natural real wood veneer where applicable
  • Veneer variation: Colour, shade and grain variation is normal
  • Veneer ageing: Natural colour maturation can occur over time

Care

  • Direct sunlight: Avoid prolonged exposure
  • Radiators / excessive heat: Avoid
  • Smoke and ozone: Avoid
  • Cabinet cleaning: Lightly damp cloth suitable for wood veneer
  • Grille cleaning: Soft dry brush
  • Tweeter: Do not physically clean or touch diaphragm
  • Bass driver: Use air brush rather than a cloth if cleaning is required

Warranty

  • Standard Harbeth manufacturer warranty: 1 year
  • Extended warranty: Up to 60 months for eligible first original owner
  • Registration deadline: Within 14 days of purchase
  • Transferable: No
  • Authorised retailer purchase: Required for eligible warranty cover
  • Proof of purchase: Required