01 / OUTPUTS
Flexible assignment
Assign one or more amplifier outputs to a zone. Outputs are configurable for mono or stereo as supported by the Sonos zone configuration.
Sonos Amp Multi - 8-Channel Professional Streaming Amplifier | AMLTIUS1BLK
Sonos Amp Multi - 8-Channel Professional Streaming Amplifier | AMLTIUS1BLK
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SKU:AMLTIUS1BLK
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Sonos Amp Multi · Professional distributed audio · AMLTIUS1BLK
Up to four zones. Eight amplified outputs. One purpose-built chassis.
Designed for integrators specifying whole-home and distributed audio, Sonos Amp Multi combines flexible output assignment, precise per-output tuning and fanless rack-friendly installation in one connected amplifier.
8 × 125 WPer output at 8 Ω, all driven
Up to 4Independent configured zones
2UWith dedicated rack mount, sold separately
ProTuneEQ, gain and delay per output
Dealer availability and ordering
Simply Controlled supports Canadian dealer projects through its Calgary distribution team. Use the product purchase panel above for current availability and your account pricing; pickup, shipping and payment options depend on the order and dealer account. For a required installation date or multi-unit purchase, confirm the available quantity and fulfilment plan with our team before committing to your customer.
Complete the installation
Amp Multi 2U Rack Mount
Accessory SKU RKMTAWW1BLKThe dedicated mount positions Amp Multi in a standard 2U rack space and creates airflow clearance above and below the chassis. It is not included with the amplifier.
Add the mount to the same dealer order from its product page. Confirm rack airflow for densely packed installations.
Start with the signal path
What four zones looks like
Amp Multi has eight assignable amplifier outputs, not eight independent music zones. Configure up to four zones; each zone has its own playback and volume control. Outputs can be reassigned as the speaker plan evolves.
Example: four stereo zones from one Amp Multi
Zone 1KitchenOutputs 1 + 2
Zone 2DiningOutputs 3 + 4
Zone 3Living areaOutputs 5 + 6
Zone 4PatioOutputs 7 + 8
Illustrative allocation, not a wiring diagram. A pair of outputs in one zone defaults to stereo during setup; larger zones can use more outputs, configured as supported by Sonos. Check total speaker load, placement, wiring and environmental suitability for each zone.
02 / SUBWOOFERS
Plan the bass
Use up to one compatible subwoofer per eligible zone. The single RCA sub output serves one zone. A compatible subwoofer can be added only when that zone uses outputs from one Amp Multi; multi-unit zones cannot take a sub.
03 / SCALING
Design beyond one unit
Sonos supports a maximum of 32 products or configured zones per system. Larger zones can combine outputs from multiple Amp Multis, subject to topology and network limits.
Early-stage project planning
How many Amp Multis might you need?
Begin with independent zone count. One unit can serve up to four zones, but the actual amplifier quantity depends on speaker loads, how many outputs each zone needs, and system topology.
1–4 zones1 unit minimum
2U with its rack mount
2U with its rack mount
5–8 zones2 units minimum
4U before rack cooling
4U before rack cooling
9–12 zones3 units minimum
6U before rack cooling
6U before rack cooling
13–16 zones4 units minimum
8U before rack cooling
8U before rack cooling
17–32 zones5–8 units minimum
10–16U before rack cooling
10–16U before rack cooling
Zone-count estimates only, not a final bill of materials or guaranteed speaker capacity. Rack figures assume the separately sold 2U mount for each amplifier and exclude ventilation allowances. A Sonos system supports up to 32 products or configured zones in total; other Sonos products also count toward that system limit. Confirm the design against current Sonos guidance before quoting.
Choosing the right amplifier
One Amp Multi or four Sonos Amps?
For a four-zone passive-speaker installation, Amp Multi can simplify the rack and cabling. Four individual Sonos Amps remain a different design choice, particularly where TV audio is required.
1 × Sonos Amp Multi
- Up to four zones from eight configurable amplified outputs.
- One chassis, one power connection and one optional wired network connection.
- Per-output ProTune and supported Sonos Architectural speaker optimization.
- Dedicated 2U Rack Mount available separately; no HDMI ARC.
4 × Sonos Amp
- Four separate stereo amplifiers can serve four distinct rooms or zones.
- Four chassis and power connections; each Amp can use its own optional wired network connection.
- HDMI ARC per Amp for suitable television-audio installations.
- Different controls and tuning; not a one-for-one replacement for Amp Multi's ProTune architecture.
Compare live dealer prices, speaker load, required inputs, rack space and installation labour when quoting. A four-Amp setup is a design comparison—not a promise of identical features or guaranteed cost savings.
Why professionals specify it
Purpose-built for installed audio
Compact rack architecture
Eight amplifier outputs in one fanless enclosure reduce device count and help simplify power distribution, networking and speaker-cable organization.
Detailed acoustic control
ProTune offers manual 10-band parametric EQ, gain trim, delay and high-pass filtering on individual outputs for challenging rooms and speaker placements.
Designed for Sonos systems
Configure zones, assign outputs and sources, and monitor status through the Sonos app. Streaming services and compatible partner-control integrations are available according to Sonos platform support.
Mechanical integration
Rack space and thermal planning
Amp Multi uses a fanless convection-cooled chassis. Installation clearance and heat loads belong in the rack design—not just the equipment list.
Rack installation
Use the purpose-built 2U Rack Mount to create passive airflow space above and below the chassis. Sonos recommends reviewing ventilation carefully and adding 1U of active cooling for every three Amp Multi units in a rack.
Non-rack placement
Place the amplifier horizontally on a stable surface. Leave at least 4 in (101 mm) on all sides, including above, and do not put equipment or objects on top.
Waste-heat examples from the Sonos specification sheet
131 BTU/hr115 VAC · 1/8 power · pink noise · 8 Ω · all 8 channels driven
107 BTU/hr240 VAC · 1/8 power · pink noise · 8 Ω · all 8 channels driven
345 BTU/hr115 VAC · full power · pink noise · 2.67 Ω · all 8 channels driven
Rounded manufacturer values, not electrical input power. Use the complete spec-sheet table for your actual loads, supply voltage and active-cooling calculation; the full-power example is a high-load design case, not typical listening heat.
Technical reference
Installer specifications
Core electrical and audio data is kept here for quotation and specification checks. Use the current Sonos documentation for final system engineering.
Amplification and audio performance
- Amplified outputs
- 8; individually assignable to zones, with mono or stereo configuration supported.
- Power rating
- 125 W per channel at 8 Ω, all channels driven.
- Minimum speaker load
- 2.67 Ω only with supported Sonos Architectural speaker configurations; verify the actual speaker model and load before specifying.
- Amplifier architecture
- Class D with gallium nitride (GaN) and post-filter feedback (PFFB).
- Damping factor
- >400 (8 Ω reference, 20 Hz–1 kHz).
- THD
- 0.005% at 2.83–15 Vrms.
- Frequency response
- 15 Hz–20 kHz, ±0.5 dB.
- Signal-to-noise ratio
- 114 dB, referenced to 125 W into 8 Ω.
- Channel separation
- −100 dB at 1 kHz; −80 dB at 10 kHz (2.83 Vrms).
- Bridging / power sharing
- Not supported.
Network, inputs, outputs and compatibility
- Wired network
- 1 × 100Base-TX Ethernet RJ45 port; no Ethernet daisy-chain.
- Wireless network
- Wi-Fi 6 on compatible 2.4 GHz / 5 GHz networks.
- Streaming
- Sonos streaming services, Apple AirPlay 2 and Spotify Direct Control; service availability and compatibility vary.
- Analog line input
- 2 × RCA analog inputs for one stereo source; assign through Sonos configuration.
- USB-C input
- Additional analog line-in via separately sold Sonos Line-In Adapter; 44.1 kHz / 16-bit. Not a USB storage or digital USB audio playback port.
- Powered subwoofer
- 1 × RCA subwoofer output, assignable to one configured zone.
- Sonos subwoofer support
- Up to one compatible Sonos Sub per eligible zone; a sub can only be attached where the zone contains outputs from a single Amp Multi.
- Speaker terminals
- 8 included custom Sonos banana plugs; standard plugs or compatible direct-wire connections also supported.
- HDMI / Bluetooth audio
- No HDMI ARC input, no Bluetooth audio streaming and no Trueplay room tuning.
Zone topology, tuning and commissioning
- Configured zones
- Up to 4 independent zones per Amp Multi.
- System ceiling
- Maximum 32 Sonos products or configured zones per system; actual combinations depend on topology and supported device counts.
- Multi-unit zones
- Large zones can combine outputs from up to 16 Amp Multis, subject to wired-network and Sonos system requirements.
- Output modes
- Two outputs in a zone default to stereo; zones using more than two outputs play mono according to Sonos guidance.
- ProTune
- 10-band parametric EQ per output (±15 dB), gain trim −15 to +5 dB, delay 0–50 ms, high-pass 15–100 Hz, with shelf and bell filters.
- Optimize Sonos Speakers
- Sonos Architectural-specific DSP and optimization when a supported speaker model is selected in the Sonos app.
- Controls
- Current-generation Sonos app for setup and zone assignment; ProTune is a separate professional web interface at protune.sonos.com for trained installers. No onboard playback/volume controls.
- Room tuning
- Does not support Trueplay; use ProTune and supported Architectural optimization.
- Indicators
- Front and rear device status indicators and eight rear output status indicators.
Mechanical, power and operating conditions
- Standalone W × H × D
- 17.2 × 2.52 × 10.44 in (436.8 × 64.5 × 265.2 mm).
- With optional 2U mount
- 19.01 × 3.47 × 10.44 in (483 × 82.3 × 265.2 mm).
- Net amplifier weight
- Approximately 11.16 lb (5.06 kg).
- Rack height
- 1.5U chassis; 2U using the separately sold rack mount.
- AC input
- Auto-switching 100–240 VAC, 50/60 Hz, 10 A universal input.
- Power consumption
- 5.4 W idle with Wi-Fi disabled; 180 W with all eight channels driven at 1/8 power into 8 Ω.
- Operating conditions
- 0–35 °C (32–95 °F); 10–85% relative humidity, non-condensing.
- Included
- Amp Multi, eight Sonos banana plugs, Ethernet ferrite clamp, 6 ft (2 m) AC power cord and supplied setup/legal documentation. Rack Mount and Line-In Adapter sold separately.
- Warranty
- 3-year limited warranty, subject to the applicable Sonos warranty terms.
- Product identification
- Sonos Amp Multi, Black · SKU AMLTIUS1BLK · UPC 840136816706.
Dealer reference library
Documentation and installation resources
Use these documents to confirm exact loads, wiring, ventilation and supported zone configurations before releasing a project BOM.
Sonos Amp Multi specification sheetManufacturer specifications · PDF
Sonos Amp Multi solution guideSystem planning and application · PDF
Amp Multi 2D CAD drawingsTechnical drawings · ZIP
Official Amp Multi installation guideSetup, topology and cooling · Sonos
Watch the Sonos Amp Multi overview
Common specification questions
Installer FAQ
Are eight outputs the same as eight independent zones?
No. The eight amplified outputs can be assigned among up to four configured zones, each with independent playback and volume.
Can I connect third-party speakers or use a 2.67 Ω load?
Amp Multi can power compatible passive speakers, but verify each speaker's rated power and the total load. Sonos specifies 2.67 Ω support for supported Sonos Architectural speaker configurations; do not assume that minimum applies to arbitrary third-party combinations.
Can a zone use multiple Amp Multis and a subwoofer?
Large zones can combine outputs from multiple Amp Multis, but Sonos states that subwoofer attachment is supported only when the zone contains outputs from one Amp Multi. Validate large-zone and subwoofer layouts in the official guide.
Can Amp Multi replace a Sonos Amp for television audio?
Not when HDMI ARC is required. Amp Multi is designed for distributed music and line-level inputs; use an HDMI-equipped Sonos Amp or compatible soundbar for television-audio requirements.
How do ordering, pickup and dealer account terms work?
Current stock status, pricing, pickup/shipping options and eligible payment methods are determined by the live store and your approved dealer account. For a multi-unit order or fixed install date, confirm availability with Simply Controlled before committing to the client.
Project Desk · Simply Controlled
Need a second look at the system design?
Share the zone schedule, speaker models and quantities, subwoofer requirements, rack plan and project deadline. We can check the equipment scope, review accessory requirements and help prepare the dealer quote.
For dealer pricing and order placement, use the product purchasing controls above. Specifications are subject to manufacturer updates; verify the latest Sonos documentation at the time of design.
Spec / Sell Sheets
Spec / Sell Sheets
