Audio T Verdict
The Innuos LPS1 provides a clear and logical upgrade path for the STREAM1, replacing its supplied switch-mode power adapter with a substantial purpose-built linear supply.
At its heart is a 150VA toroidal transformer supported by medical-grade mains filtering and premium Mundorf and Nichicon capacitors. The aim is to provide the connected streamer with a cleaner, more stable and lower-noise electrical supply.
The STREAM1 already uses Innuos’s CX Regulator to provide an independent low-noise supply for its optional audio-output module. Feeding the wider system from the LPS1 allows that internal regulation to operate from a more substantial linear power source rather than the standard external switch-mode adapter.
During our own listening session with the STREAM1 and PerformanceDAC module, adding the LPS1 made the presentation sound more controlled and authoritative. Instruments gained greater texture and separation, while the music felt more energetic and involving rather than simply brighter or more detailed.
The second regulated output adds considerable practical value. It can be switched between 5V and 12V and can supply a compatible accessory drawing no more than 1.5A. Depending on its electrical requirements, this might include a DAC, network switch, router or another low-voltage component.
This does not make the LPS1 a universal power supply. The dedicated 19V connection is strictly for supported Innuos products, while the accessory output must match the destination product’s voltage, current requirement, polarity and connector.
Current confirmed Innuos compatibility includes the STREAM1 and NET1. The LPS1 is also backwards compatible with the ZENmini Mk3 and PULSEmini, providing owners of those discontinued products with a current linear power-supply upgrade.
A 4mm chassis-grounding connection allows the LPS1 to be used with a suitable grounding system where required. This is an optional signal-noise management feature and must never be confused with, or substituted for, the protective earth supplied through the mains cable.
The compact 240mm-wide chassis matches the STREAM1, with a substantial 10mm CNC-machined aluminium fascia. The two products can be positioned side by side or arranged together on a suitable equipment support.
The LPS1 is most relevant once the basic STREAM1 configuration, DAC, amplifier, loudspeakers, network and room setup are already working well. In a carefully matched system, it provides a worthwhile way to take the streamer’s performance further without changing its software, storage or audio-output architecture.
Innuos LPS1 Dual-Output Linear Power Supply
The Innuos LPS1 is a dedicated external linear power supply designed primarily for the STREAM1 music streamer and server.
It replaces the STREAM1’s standard external switch-mode power supply and provides a second regulated output for a compatible 5V or 12V accessory.
Its internal design combines a substantial toroidal transformer, mains filtering, high-quality capacitors and low-noise regulation within a compact enclosure that visually matches the STREAM1.
Compatibility Must Be Confirmed Before Connection
The LPS1 provides two different DC outputs with different intended uses.
- The 19V output is strictly for supported Innuos products
- The accessory output can be set to either 5V or 12V
- The accessory output has a maximum capacity of 1.5A
- The accessory voltage must be selected before connection
- The destination product’s polarity must match
- The DC connector must be correct
- Never connect a product merely because the plug appears to fit
Using the wrong voltage, polarity or connection may damage the LPS1 and connected equipment.
What Is a Linear Power Supply?
A power supply converts the alternating current provided by the mains into the direct-current voltage required by the connected component.
Compact switch-mode supplies perform this conversion using high-frequency switching circuitry. They are efficient, light and practical, but their switching operation can also generate high-frequency electrical noise.
A traditional linear supply uses a mains transformer, rectification, energy-storage capacitors and regulation to produce the required DC output.
The LPS1 is designed to provide a substantial low-noise power source for sensitive digital audio equipment rather than prioritising minimum size and weight.
Why Upgrade the STREAM1 Power Supply?
The STREAM1 is supplied with a medical-grade filtered switch-mode power supply that allows the base product to remain compact and comparatively accessible.
The LPS1 provides the next stage in the STREAM1 upgrade path by moving the transformer, rectification and main power-supply circuitry into a dedicated linear unit.
Possible system benefits can include:
- A lower electrical noise floor
- More stable power delivery
- Improved low-level detail
- Clearer separation between instruments
- More controlled bass
- Greater dynamic authority
- A more natural and involving presentation
The size and character of any improvement will depend on the STREAM1 configuration, output module, DAC, amplifier, loudspeakers, network and room.
150VA Toroidal Transformer
The LPS1 is built around a 150VA toroidal transformer.
A toroidal transformer uses a ring-shaped magnetic core with the windings arranged around it. This allows a substantial transformer to fit within the LPS1’s compact half-width enclosure.
The transformer provides the electrical foundation for the LPS1’s two regulated DC outputs and gives the power supply considerable capacity relative to the requirements of a compact network streamer.
150VA Is Not an Audio Power Rating
The 150VA figure describes the transformer’s apparent-power capacity.
It is not an amplifier output rating, the normal electricity consumption of the STREAM1 or the available power from the accessory connection.
Medical-Grade Mains Filtering
Medical-grade AC filtering is applied at the LPS1 mains input.
This is intended to reduce unwanted high-frequency noise entering the power supply through the mains connection and limit noise travelling back towards other equipment.
The LPS1 must still be connected to a correctly wired and earthed mains socket using the supplied cable or a suitable approved replacement.
Premium Mundorf Capacitors
Premium Mundorf capacitors are used within the main linear power-supply architecture.
The capacitor bank stores energy following rectification and helps smooth the DC supply before it reaches the final regulation stages.
Capacitance alone does not determine power-supply performance. Transformer design, mains filtering, rectification, regulation, grounding, internal layout and output cabling all contribute to the completed supply.
Nichicon-Regulated Accessory Output
The second output uses dedicated Nichicon regulation and can be switched between 5V and 12V.
This allows the LPS1 to power one compatible accessory alongside the supported Innuos product connected to the 19V output.
The accessory must draw no more than 1.5A and must be fully compatible with the selected voltage, connector and polarity.
Dual-Output Design
The LPS1 can power two compatible products simultaneously:
- One supported Innuos product through the dedicated 19V output
- One compatible accessory through the switchable 5V or 12V output
This can remove two separate external switch-mode adapters from the system while requiring only one mains connection for the LPS1.
The two outputs must not be combined, split or adapted to power additional products unless Innuos has specifically approved the arrangement.
Dedicated 19V Innuos Output
The fixed 19V output is reserved for supported Innuos products.
Confirmed current applications include:
- Innuos STREAM1
- Innuos NET1
- Innuos ZENmini Mk3
- Innuos PULSEmini
Compatibility should always be confirmed by product model and generation. A similar-looking DC connection does not mean that another Innuos or third-party product is suitable.
The 19V Output Is Not a Universal Accessory Supply
Do not use the 19V connection for a third-party DAC, switch, router, amplifier or computer.
It is specifically reserved for supported Innuos equipment.
STREAM1 Compatibility
The LPS1 was developed as the matching linear power-supply upgrade for the Innuos STREAM1.
The STREAM1 and LPS1 share the same 240mm width, 200mm depth and 80mm height, giving the two products a consistent appearance when positioned together.
The STREAM1’s internal CX Regulator continues to provide a dedicated low-noise supply for its optional output module. The LPS1 replaces the external switch-mode supply feeding the overall STREAM1 system.
NET1 Compatibility
The LPS1 can also provide the dedicated power-supply upgrade for the Innuos NET1 network switch.
This allows one LPS1 to power either a STREAM1 or NET1 through its 19V connection.
Where both products are used together, a separate compatible supply is required for the second 19V product because the LPS1 provides only one dedicated 19V output.
ZENmini Mk3 Compatibility
The LPS1 is backwards compatible with the Innuos ZENmini Mk3.
This gives owners of the discontinued server an upgrade path using the current LPS1 rather than requiring the original ZENmini LPSU.
Compatibility applies specifically to the Mk3 model. Earlier ZENmini generations should be checked directly with Audio T or Innuos before connection.
PULSEmini Compatibility
The LPS1 is also backwards compatible with the discontinued Innuos PULSEmini network player.
This allows the PULSEmini’s original external supply to be replaced with the current LPS1 while retaining the existing streamer, DAC and software platform.
Not Designed for STREAM3
The STREAM3 contains its own substantial ARC6-CX linear power supply and connects directly to the mains.
It does not require or accept the LPS1 as its principal power supply.
Customers choosing between the two platforms should compare the Innuos STREAM3 with a suitably configured STREAM1 and LPS1 combination.
Switchable 5V or 12V Accessory Output
The second DC output can be selected for either 5V or 12V operation.
It may be suitable for products such as:
- Selected external DACs
- Compatible network switches
- Compatible routers
- Selected USB accessories
- Other low-voltage audio or network products
The destination product must require the selected voltage and no more than 1.5A.
A product requiring less than 1.5A may be suitable, provided the voltage, polarity and connector also match. A product requiring more than 1.5A is not suitable.
Select the Voltage Before Connection
Switch off and disconnect the LPS1 from the mains before changing the 5V or 12V selector.
Confirm the required accessory voltage from the product label, manual or manufacturer before connecting the DC cable.
Never change the voltage while an accessory is connected and powered.
Understanding the 1.5A Limit
The auxiliary output can supply a maximum current of 1.5A.
The connected accessory determines how much current it draws. A compatible product rated at 5V and 1A can draw the current it requires from the 5V setting.
A product marked 12V and 2A may require more current than the LPS1 can provide and should not be connected.
Do not assume that an accessory is compatible because its normal average consumption appears low. Use the manufacturer’s stated maximum requirement.
Voltage Must Match Exactly
The selected LPS1 voltage must match the accessory’s specified input voltage.
Potentially Suitable
- 5V accessory drawing no more than 1.5A
- 12V accessory drawing no more than 1.5A
- Correct centre polarity
- Correct DC plug dimensions
- Manufacturer approval for an external linear supply
Not Suitable
- 9V equipment
- 15V equipment
- 18V equipment
- 19V third-party accessories
- 24V equipment
- Products requiring more than 1.5A
- Products with incompatible polarity or connectors
Check Polarity and Connector Size
Matching voltage and current are not enough on their own.
The accessory’s DC connector must have the correct outer and inner dimensions, and the electrical polarity must match the LPS1 cable arrangement.
Using an incorrect adaptor can reverse the polarity or create an unreliable connection even when the voltage is correct.
Use the supplied interconnecting cables where appropriate or an adaptor specifically approved for the intended equipment.
Do Not Force a DC Plug
A plug that is too small, too large or the wrong internal diameter can damage the socket or make intermittent contact.
Stop immediately if the connector does not insert smoothly and securely.
One Accessory per Auxiliary Output
The switchable output is intended to power one compatible accessory.
Do not use an unapproved splitter or daisy-chain cable to power several devices from the same socket.
The combined load could exceed the 1.5A limit, and different products may require incompatible connectors or grounding arrangements.
4mm Chassis-Grounding Port
A 4mm grounding connection is provided on the rear panel.
This may be connected to a suitable grounding system to help manage unwanted electrical noise within a compatible installation.
The effect will depend on the existing grounding arrangements, connected equipment and grounding product.
A grounding connection should be evaluated rather than assumed to improve every system.
Chassis Ground Is Not a Safety-Earth Replacement
The 4mm connection does not replace the protective earth supplied through the mains cable.
Never disconnect, lift or modify the mains safety earth in an attempt to remove hum or noise.
Matching STREAM Series Design
The LPS1 uses the same compact proportions as the STREAM1.
A 10mm CNC-machined aluminium front panel creates a continuous visual design when the products are positioned together.
The LPS1 measures 240mm wide, 200mm deep and 80mm high, allowing the pair to fit on shelves where two conventional full-width components would be impractical.
Side-by-Side Placement
Placing the STREAM1 and LPS1 side by side makes both rear panels easy to access and avoids placing the transformer directly beneath the streamer.
The arrangement requires approximately 480mm of shelf width before allowing for ventilation and cable clearance.
Keep mains and DC cables tidy and avoid tightly coiling excess cable immediately behind the components.
Stacked Placement
Innuos designed the matching cases so that the STREAM1 and LPS1 can form a visually consistent stack.
Use a rigid, level support and ensure that ventilation openings are not blocked.
Where a system is particularly sensitive to transformer vibration or electromagnetic interaction, compare stacked and side-by-side placement.
Do not place an unrelated heavy or heat-producing component on top of the LPS1.
Compact but Substantial Construction
Although the LPS1 has a compact half-width footprint, it weighs approximately 3.9kg.
The weight reflects its 150VA transformer, capacitor bank, metal enclosure and dual-output power circuitry.
The supporting shelf should be rigid and stable, particularly when the LPS1 and STREAM1 are arranged together.
Black Finish
The LPS1 is supplied in Black to match the current STREAM1.
Its understated front panel allows the power supply to integrate visually with the streamer without adding unnecessary displays or controls to the front of the system.
LPS1 or the Standard STREAM1 Power Supply?
Use the Standard Supply When
- You are initially configuring the STREAM1
- The available budget should first fund storage or an output module
- The DAC, amplifier or speakers remain the main limitation
- You want to establish a performance reference first
- Shelf space is particularly restricted
- No second accessory supply is required
Add the LPS1 When
- The STREAM1 system is already well matched
- You want a purpose-built linear supply
- The system is revealing enough to show the difference
- A compatible 5V or 12V accessory can also be powered
- You want to remove one or two external switch-mode adapters
- A demonstration confirms a worthwhile improvement
LPS1 or STREAM3?
Choose STREAM1 with LPS1 When
- You want a compact modular streaming system
- STREAM1 output modules cover the required connections
- You prefer to build the system in stages
- A second 5V or 12V accessory output is useful
- 2TB or 4TB factory storage is sufficient
- PhoenixDAC and PhoenixI2S are not required
Choose STREAM3 When
- You want the integrated ARC6-CX power architecture
- PhoenixDAC or PhoenixI2S is required
- Balanced analogue output is important
- Up to 8TB factory storage is needed
- A full-width reference chassis is preferred
- The larger overall investment suits the system
LPS1 or a Mains Conditioner?
The LPS1 and a mains conditioner perform different jobs.
The LPS1 converts incoming AC mains power into the specific low-voltage DC supplies required by the connected products.
A mains conditioner or distribution block works further upstream and may provide filtering, surge protection, DC blocking or improved distribution for several mains-powered components.
The LPS1 should not be described as a replacement for every mains product, nor should an external conditioner automatically be assumed to improve the LPS1.
Browse mains and signal conditioners at Audio T.
Connection Sequence
- Shut down the STREAM1 or other supported Innuos product correctly.
- Switch off the connected accessory.
- Disconnect the LPS1 from the mains.
- Confirm that the intended Innuos model supports the 19V output.
- Confirm the accessory voltage, current, polarity and connector.
- Select 5V or 12V before connecting the accessory.
- Connect the supplied 19V DC cable to the supported Innuos product.
- Connect the second approved DC cable to the accessory where required.
- Check that both DC plugs are fully and securely inserted.
- Connect the supplied mains cable to the LPS1.
- Connect the mains cable to a correctly wired wall socket or distribution product.
- Power the LPS1 and connected products according to their instructions.
- Confirm that both products start and operate normally.
Disconnecting the LPS1
Stop music playback before disconnecting the power supply.
Reduce the amplifier volume or mute the system to prevent unwanted noises reaching the loudspeakers.
Shut down the STREAM1 correctly through its control interface before removing power.
Disconnect the LPS1 from the mains before removing either DC cable or changing the accessory-voltage setting.
Do Not Hot-Plug the DC Connections
Do not insert or remove a DC power connector while the LPS1 is connected to the mains and operating.
Hot-plugging can create a brief electrical transient or partial connection that may affect the connected equipment.
Complete all DC connections while the products are switched off.
Mains Voltage
The LPS1 is produced for 230V and 115V markets.
The UK model must be the correct 230V regional version.
Do not assume that a unit can be converted between regional mains voltages by the user.
Check the rating label before connecting a used, imported or ex-demonstration product.
Use the Correct Fuse
Where a fuse requires replacement, use only the type and rating specified by Innuos for the regional LPS1 version.
Do not fit a larger fuse in an attempt to prevent repeated failure.
A fuse that fails again may indicate a fault requiring inspection by Audio T or Innuos.
Placement and Ventilation
Place the LPS1 on a dry, stable and level equipment shelf.
Keep it away from radiators, direct sunlight, moisture and enclosed spaces with poor airflow.
Avoid positioning sensitive moving-coil phono stages, cartridges or very low-level analogue cables immediately beside the LPS1 transformer.
Where hum or interference is suspected, increase the physical separation and compare cable routing.
Cable Routing
Route the AC mains cable and low-voltage DC cables without sharp bends or strain.
Where practical, avoid running mains cables closely alongside low-level analogue interconnects and phono cables for long distances.
Do not coil excess DC cable tightly around the LPS1 or connected streamer.
Both supplied DC cables measure approximately 1m, allowing the connected products to be positioned without excessive cable length.
What the LPS1 Does Not Do
- It does not stream music
- It does not store music
- It does not contain a DAC
- It does not provide analogue audio outputs
- It does not regenerate USB audio
- It does not reclock Ethernet data
- It does not replace the STREAM1 output module
- It does not add Wi-Fi or Bluetooth
- It does not provide surge protection for the complete Hi-Fi system
- It is not a universal adjustable laboratory power supply
System Matching
Well Suited To
- Innuos STREAM1 systems
- Innuos NET1 network switches
- Innuos ZENmini Mk3 servers
- Innuos PULSEmini network players
- STREAM1 systems with optional DAC modules
- STREAM1 systems feeding an external USB DAC
- Compatible 5V network accessories
- Compatible 12V DACs and network products
- Compact half-width equipment installations
- Systems ready for a dedicated source upgrade
Check Before Buying
- The Innuos product is officially supported
- The accessory requires exactly 5V or 12V
- The accessory draws no more than 1.5A
- The polarity is correct
- The supplied cable or adaptor fits correctly
- The UK 230V version is being supplied
- The shelf can support 3.9kg
- There is adequate space for both DC cables
- The chassis-ground connection is understood
- A demonstration confirms that the upgrade suits the system
Innuos Products and Audio T Digital Guides
Key Features
- Dedicated external linear power supply
- Designed to match the Innuos STREAM1
- Compatible with the Innuos NET1
- Backwards compatible with ZENmini Mk3
- Backwards compatible with PULSEmini
- 150VA toroidal transformer
- Medical-grade AC mains filtering
- Premium Mundorf capacitors
- High-quality Nichicon capacitors
- Dedicated 19V Innuos output
- Switchable 5V or 12V accessory output
- 1.5A maximum accessory output
- Dual-device power capability
- Can replace two external power adapters
- Compatible with selected external DACs
- Compatible with selected network switches
- Compatible with selected routers
- 4mm chassis-grounding connection
- 10mm CNC-machined aluminium fascia
- Compact 240mm-wide chassis
- Matching STREAM1 dimensions
- Side-by-side installation capability
- Stacked installation capability
- Black finish
- Two 1m DC interconnecting cables supplied
- 2m mains cable supplied
- Three-year manufacturer warranty
Frequently Asked Questions
What is the Innuos LPS1?
It is a dedicated external linear power supply for the STREAM1 and other supported Innuos products, with a second regulated output for a compatible accessory.
Which product was it primarily designed for?
It was designed as the matching linear power-supply upgrade for the Innuos STREAM1.
Does it replace the STREAM1 power adapter?
Yes. The LPS1 replaces the standard external switch-mode supply connected to the STREAM1’s 19V input.
Which Innuos products are compatible?
Current confirmed compatibility includes STREAM1 and NET1, with backwards compatibility for ZENmini Mk3 and PULSEmini.
Can it power the STREAM3?
No. STREAM3 contains its own internal ARC6-CX linear power supply.
Can it power two STREAM1 units?
No. Only one dedicated 19V Innuos output is provided.
Can it power a STREAM1 and NET1 together?
Not through the two different LPS1 outputs. Both require the dedicated supported Innuos connection rather than treating one as a general 5V or 12V accessory.
What transformer does it use?
It uses a 150VA toroidal transformer.
What capacitors are used?
Innuos specifies premium Mundorf and Nichicon capacitors.
Does it include mains filtering?
Yes. Medical-grade AC filtering is included.
How many outputs does it have?
It provides one dedicated 19V output and one accessory output switchable between 5V and 12V.
What is the maximum accessory current?
1.5A.
Can it power a 5V DAC?
Potentially, provided the DAC requires no more than 1.5A and its polarity, connector and external power-supply requirements are compatible.
Can it power a 12V network switch?
Potentially, subject to the same 1.5A, polarity and connector requirements.
Can it power a 9V product?
No. The accessory output provides only 5V or 12V.
Can it power a 15V product?
No.
Can it power a product requiring 12V and 2A?
No. That exceeds the 1.5A maximum.
Can it power a product requiring 12V and 1A?
It may be suitable if the polarity, connector and manufacturer requirements also match.
Can the 5V or 12V setting be changed while powered?
No. Disconnect the LPS1 from the mains and the accessory before changing the voltage.
Can I use a splitter cable?
This is not recommended. The accessory output is designed for one compatible product.
Can the 19V output power third-party equipment?
No. Innuos specifies that this output is strictly for supported Innuos products.
Are DC cables included?
Yes. Two 1m DC interconnecting cables are supplied.
Is a mains cable included?
Yes. A 2m mains cable is supplied.
What is the chassis-grounding connection?
It is a 4mm connection for a suitable optional grounding system.
Does the grounding socket replace the mains earth?
No. The protective mains earth must remain connected.
Can it be stacked with the STREAM1?
Yes. The cases are designed to form a matching compact system, provided the shelf is stable and ventilation is not obstructed.
Can it be positioned beside the STREAM1?
Yes. Both products have matching 240mm-wide, 200mm-deep and 80mm-high enclosures.
Does it contain streaming software?
No. It is a power supply and has no network, music or control functions.
Does it require the Sense app?
No. Sense continues to control the connected STREAM1, but the LPS1 itself requires no app.
Will it improve every system?
The result depends on the connected products and wider system. A demonstration is recommended where possible.
Should I buy the LPS1 before a STREAM1 output module?
That depends on the system. An output module may be essential to provide the required connection, while the LPS1 is a performance upgrade once the system is operating correctly.
What mains voltage does the UK model use?
The UK version is intended for a 230V AC supply.
What are its dimensions?
It measures 240mm wide, 200mm deep and 80mm high.
How much does it weigh?
Approximately 3.9kg.
Which finish is available?
Black.
What is included in the box?
The LPS1, a 2m mains cable, two 1m DC interconnecting cables and a Quick Start Guide are supplied.
What is the warranty?
Innuos provides a three-year manufacturer warranty, with claims handled through the original supplying dealer and proof of purchase required.
Why Buy From Audio T?
- Demonstrations with a suitably configured STREAM1
- Direct comparisons with the standard STREAM1 power supply
- STREAM1 and LPS1 bundle guidance
- Innuos product-generation compatibility checks
- ZENmini Mk3 and PULSEmini upgrade advice
- NET1 power-supply guidance
- 5V and 12V accessory compatibility checks
- Maximum-current calculations
- DC connector and polarity guidance
- Grounding-system advice
- Stacked and side-by-side placement guidance
- Mains cable and distribution advice
- STREAM1 output-module demonstrations
- Music-server and DAC system matching
- Part exchange may be available on suitable existing equipment
- Three-year manufacturer warranty support
- Ongoing setup and troubleshooting assistance
Contact your local Audio T store to arrange a demonstration or confirm whether your Innuos product and chosen accessory are compatible with the LPS1.