Roland M-400 USB & Phone Board Replacement Part Kit **Never Used or Owned**

Roland M-400 USB & Phone Board Replacement Part Kit **Never Used or Owned**
Outside the lower 48 states? Message us! In many cases, we can ship worldwide :)

NEVER OWNED

Ready to drop in as a replacement part for your Roland M-400 Mixer

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# Scott #

09/28/2026

Below are the M-400 specs for your reference:

SPECS

Processing

• Channels: 48 Inputs / 18 Buses
• Signal Processing: 56-bit
• AD/DA Conversion: 24-bit
• Sample Rate: 44.1 kHz or 48 kHz (system latency spec at 48.0 kHz)
• Network Latency: 2.8 ms (typical)
• • Total system latency from S-1608 inputs to outputs via M-400 REAC ports (A or B)
• Effects: No insert effects

ConnectorsInputs

• XLR Inputs (1–8): XLR-3-31 type (balanced, phantom power)
• Talkback Mic Input: XLR-3-31 type (balanced, phantom power)
• RCA Inputs (L/R): RCA pin type

Outputs

• XLR Outputs (1–8): XLR-3-32 type (balanced)
• Phones Output: Stereo 1/4" phone type
• Digital Outputs: Optical ×1, Coaxial ×1

Network / Data

• REAC Ports: RJ-45 EtherCon ×3
• USB Ports: Type-A ×1, Type-B ×1
• Remote Connectors:
• • RS-232C (D-Sub 9-pin) ×1*
  • MIDI (5-pin DIN) ×2 (Out/Thru & In)
  • Serial remote control not available on Version 1 firmware

Other

• LAMP: XLR-4-31 type ×1
• Grounding Terminal
• AC Input

Audio PerformanceFrequency Response

• XLR Outputs (1–8): -2 dB / +0 dB (20 kΩ load, +4 dBu)
• Phones Jack: -3 dB / +0 dB (40 Ω load, 150 mW)

Total Harmonic Distortion + Noise

• XLR Outputs (1–8): 0.05% (typical)
• Phones Jack: 0.05% (typical)

Dynamic Range

• XLR Outputs (1–8): 110 dB (typical)

Crosstalk @ 1 kHz

• XLR Inputs (1–8): -80 dB (Pad ON, Input Gain +10 dBu, typical)
• XLR Outputs (1–8): -100 dB (typical)

Input SpecificationsNominal Input Level (Variable)

• XLR Inputs (1–8):
• • -65 to -10 dBu (Pad OFF)
  • -45 to +10 dBu (Pad ON)
• RCA Inputs (L/R): -18 to 0 dBu
• Talkback Input: -50 to -10 dBu

Input Impedance

• XLR Inputs (1–8): 14 kΩ
• RCA Inputs (L/R): 10 kΩ
• Talkback Input: 41 kΩ

Maximum Input Level (Non-Clip)

• XLR Inputs (1–8):
• • +8 dBu (Pad OFF)
  • +28 dBu (Pad ON)
• RCA Inputs (L/R): +18 dBu
• Talkback Input: +8 dBu

Output SpecificationsNominal Output Level

• XLR Outputs (1–8): +4 dBu (10 kΩ load)

Output Impedance

• XLR Outputs (1–8): 600 Ω
• Phones Jack: 100 Ω

Recommended Load Impedance

• XLR Outputs (1–8): 10 kΩ or greater
• Phones Jack: 8 Ω or greater

Maximum Output Level (Non-Clip)

• XLR Outputs (1–8): +22 dBu (1 kHz, 10 kΩ load)
• Phones Jack: 150 mW + 150 mW (1 kHz, 40 Ω load)

Noise

• Residual Noise (IHF-A, typical): -88 dBu (All faders minimum)
• Equivalent Input Noise (E.I.N.): -126 dBu

Display & Power

• Display: 800 × 480 Wide VGA backlit TFT full color
• Power Supply:
• • AC 115 V / 117 V / 220 V / 230 V / 240 V (50/60 Hz)
• Power Consumption: 95 W

? Why Buy From Blues Angel Music? ?

Blues Angel Music is one of the Gulf Coast’s most trusted music stores, with decades of experience serving musicians around the world. Every instrument we sell is carefully inspected, accurately described, and photographed so you know exactly what you’re getting. Our team of knowledgeable musicians is always happy to answer questions, and every guitar is professionally set up & inspected when needed to ensure it arrives ready to play. We take pride in secure packing, fast shipping, and providing a smooth, reliable buying experience from start to finish.

Shipping

We offer worldwide shipping, and rates may vary by destination. If you’re located outside the USA, please contact us for an accurate shipping quote before purchasing.

All orders are shipped within 1 business day in the continental U.S. of received payment. (Expedited and HI and AK shipping available for additional cost)

All items are shipped insured

We ship most of our items in custom-made/double-walled boxes, as many original manufacturer's shipping boxes are not strong enough to withstand multiple shipments, and have already been used at least once to ship to us. Your item may not come in the original manufacturer's box. We do our very best to ensure that your instrument arrives safely and securely. See our feedback for positive comments on how well we ship!

Large Packaged Items such as Guitars, Basses, Amps, Drums, and Keyboards being shipped to Post Office Boxes will incur additional charges.

Orders over $50.00 require a signature*

*If you do not wish to have a signature for your item you must submit to us that you do not wish to have a signature on your item. You assume any and all responsibility in the event your purchased item is lost during shipment or stolen from your home.

Returns

Please note that original shipping costs are non-refundable for returns on non-defective items, and a 10% restocking fee will apply to all non-defective returns.