What class is this amplifier? A previous answer says class a/b but the description says class D...

It is a Class A B amplifier, definitely not Class D. It likely has a digital switching circuit in there somehow but the outputs sections are old-fashioned boat anchor type. If it was a Class D digital amplifier you'd have all that power and about a quarter of the weight.

im Trying to power 6 speakers in 3 zones in a restaurant. Can this unit play to all zones at the same time or is it only 1 zone at a time powered?

Yes, this unit can play to all zones at the same time.

What class is this amplifier? class a/b, class d?

Hello! This amplifier is class a/b.

I have six different rooms with speakers wired. Can I use this to power and turn on/off rooms? I.e. kitchen and living room on and dining room off?

The six zones, or 12 channels, share a common power supply and turn-on method either manually switched (on the front), auto sensing, or from a 12-volt trigger (hard wired). You can select a common source (1 or 2) or connect an independent source per channel or zone but you are restricted to the turn-on option you select for all. Your best bet would be to use in-wall volume controls.

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OSD Audio 4 Zone 8-Channel Digital Amplifier, 80W/Channel, Distributed Audio & Home Theater - MX880, 80W x 8

Product ID: 407644091

Details

Brand
OSD Audio
Item dimensions L x W x H
42.7 x 41.7 x
Manufacturer
OSD Audio
Mounting type
Freestands
Number of channels
8

📱App control for iOS & Android

🔊80W per channel power

🔗Expand up to 18 zones

Description

🎶 Amplify your lifestyle with multi-zone mastery!

MULTI SOURCE MAGIC - Play different audio in each zone or unify the vibe with up to 6 simultaneous sources.
POWER YOUR ENTIRE SPACE - 6 independent zones with 80W stereo amplification deliver crystal-clear sound everywhere.
SEAMLESS SMART HOME SYNC - RS232 integration ensures flawless compatibility with your existing home automation setup.
FUTURE PROOF EXPANDABILITY - Scale your system up to 18 zones with additional amps—perfect for growing homes or offices.
TOTAL CONTROL IN YOUR HANDS - Manage volume, sources, and zone grouping effortlessly via the sleek OSD Control App.

The OSD Audio Nero Max12 is a powerful 12-channel, 6-zone amplifier delivering 80W per channel at 4 ohms, designed for whole-home or light commercial audio distribution. It features multi-source playback, app-based control for iOS and Android, RS232 smart home integration, and expandable architecture supporting up to 18 zones, making it a versatile solution for seamless, customizable audio experiences.

Specifications

ASIN	B083KP5QDH
Best Sellers Rank	#177,033 in Electronics ( See Top 100 in Electronics ) #552 in Home Audio Amplifiers
Brand Name	OSD Audio
Customer Reviews	4.1 4.1 out of 5 stars (79)
Included Components	Quick Start Guide
Item Dimensions	42.7 x 41.7 x 8.8 centimeters
Item Weight	8.62 kg
Manufacturer	OSD Audio
Material Type	Metal
Maximum Output Power	640 watts
Model	MX880 GEN2
Mounting Type	Freestands
Number of Channels	8
Number of Items	1
Output Power	80 Watts
Package Type Name	Box
Part Number	MX880
Specification Met	FCC
UPC	810281011264
Unit Count	8 Count

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