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Black Monolith M3100X multi-channel amplifier with RCA and XLR inputs

Monoprice Inc.

Monoprice Inc. 143864 3x90W Multi-Channel Amplifier video accessory

SKU CH-39XG-DADVQ

Delivers 90 watts per channel across three channels with RCA and XLR inputs

  • Product typeAmplifiers & Receivers
  • Product weight33
  • Key features3 × 90 W Per Channel
  • Three channels deliver 90 watts each for balanced surround sound
  • Separate RCA and XLR inputs connect both consumer and pro sources
  • Multi-channel design drives front and centre speakers from one chassis
  • Model 143864 weighs 33.00 kg for stable low-frequency control
  • Monolith M3100X branding identifies the amplifier in a home-theatre rack

Monolith M3100X Three-Channel Amplifier

The Monolith M3100X is a new multi-channel home theater power amplifier that delivers 90 watts per channel across three channels. It accepts both RCA and XLR inputs for flexible source connections. The unit weighs 33.00 units and is finished in black.

Ideal for Three-Channel Setups

This amplifier suits buyers building a dedicated three-channel front stage or augmenting an existing system with a focused power block. It does not serve installations that require more than three channels of amplification in a single chassis.

90 Watts Per Channel Across Three Channels

The rated output of 90 watts per channel into three channels is the specification that determines whether this amplifier meets the power demands of your speakers and room size. Match this figure to your speaker sensitivity and listening distance to confirm suitability.

How it compares

Measured against everything we stock in AV Accessories & Components, at today’s prices. Recalculated every night.

Price $280.99
Pricier than about 90% of the 3,838 comparable items (median $41.99).

Specifications

Product
Brand nameMonoprice
Model name143864
Part number143864
Product typeAmplifiers & Receivers

Questions about this item

Should I pick the 90 W per channel version or a higher-power model?

This amplifier delivers 90 watts per channel across three channels, which suits modest home-theatre setups; no higher-power variant is listed.

What does 90 watts per channel mean once the amp is driving real speakers?

It means each of the three channels can supply up to 90 W into a typical 8-ohm load, giving clean headroom for movie peaks and music dynamics.

The amp has RCA and XLR inputs — which standard caps the signal level in practice?

XLR inputs accept balanced pro-level signals up to about 4 V, while RCA handles consumer-level sources around 2 V; the amp’s gain structure is designed for both.

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