Product highlights

8-channel amplifier 

four independent audio zones 

50 watts per channel into 8 ohms 

80 watts per channel into 4 oms 

each zone is bridgeable to 160 watts mono into 8 ohms (8-ohm speakers only) 

uses efficient Class D amplification 

frequency response: 20-20,000 Hz (+1.7 / -1 dB) 

signal-to-noise ratio: 90 dB 

independent left and right volume/gain controls for all eight channels 

signal-sensing automatic turn-on 

stereo RCA line inputs for each zone 

BUS1 and BUS2 RCA line inputs for playing the same sources in multiple zones 

BUS1 and BUS 2 RCA line outputs for daisy-chaining to other amplifiers 

detachable speaker wire terminals accept up to 14-gauge wire 

independent input switch for each zone lets you select line, BUS1, or BUS2 sources 

BUS 12-volt input and output for simplified control over zones using RCA BUS input as a source 

12-volt trigger input/output for connecting and controlling other 12-volt devices 

detachable AC power cord 

rack-mountable (hardware included) 

16-13/16"W x 4-1/16"H x 17-11/16"D (2U rack spaces) 

weight: 19 lbs. 

warranty: 2 years 

What's in the box

• 8-Channel amplifier 
• 6' AC power cord 
• 2 Rack-brackets (pre-installed) 
• Owner's Manual 

About this item

Written by Crutchfield's Archer A.

Multi-room audio made easy

OSD's MX880 is worth considering when you're trying to pick out an amp for a multi-room speaker system. It provides clean, reliable amplification for stereo speakers for up to four independent audio zones. It offers plenty of inputs, so there's no shortage of ways to get the right tunes in the right rooms. And it's rack-mountable with the included hardware for a tidy custom installation.

Versatile setup options

The versatility of the MX880 makes it an appealing piece of gear. You can use it alongside a surround sound preamp and have it power your home theater system. But this amp also has an array of features meant for custom-installed multi-room audio setups.

Each of the amp's four zones has its own independent volume control, input switching, and auto turn-on options. Two sets of BUS inputs allow easy sharing of sources across all zones, or you can select independent line inputs for each zone.

Clean amplification

OSD uses clean, efficient Class D amplification in the MX880, and for good reason: this kind of amp circuit runs cool even if you're pushing it as hard as it can go. Speaking of which, the amp has built-in safeguard circuitry that protects it from overload and short circuits. 

Each amplifier zone can be internally bridged by using its stereo/bridge switch. That'll combine the power of two channels into a single more powerful mono channel — great for feeding power-hungry speakers.