Extron ATB 220 (part number 70-1375-01) — a one-piece galvanized steel bracket built to mount small, plenum-rated power amplifiers onto Extron ceiling tile speaker systems.

Integrators fitting a compact amplifier above a suspended-ceiling speaker often run into mismatched hole patterns and no clean way to anchor the amplifier near the enclosure it feeds. The ATB 220 addresses that with a bracket machined for both quarter-rack and half-rack amplifier footprints, so units such as the Extron MPA 601 or NetPA 204 POE attach directly to the back of compatible ceiling tile speakers. The obround openings line up with the speaker's terminal cover plate screws, letting the bracket slide into place without blocking wiring access, and a secondary attachment point adds seismic security to the finished install.

Key Capabilities

• One-piece galvanized steel bracket mounts amplifiers to Extron ceiling tile speakers
• Fits quarter-rack and half-rack amplifiers like the MPA 601 and NetPA 204 POE
• Includes six cable tie-down points for clean wire management
• All mounting hardware included, including #4-40 x 3/16 inch screws
• Compatible with FF 220T, FF 120T, SF 228T Plus and CS Series ceiling speakers
• Secondary attachment point adds seismic security for suspended ceiling installs

Where It Is Used

The ATB 220 shows up on ceiling audio projects in conference rooms, classrooms, retail spaces and corridors where a distributed 70/100V speaker system needs its amplifier tucked directly above the tile rather than in a rack room. It keeps plenum-rated amplifiers close to the speakers they drive while staying out of the ceiling grid's sightline.

Specifications at a Glance

• Construction: galvanized steel, one-piece bracket
• Mounting: quarter-rack and half-rack amplifier hole patterns
• Hardware: all fasteners included
• Compatible speakers: FF 220T, FF 120T, SF 228T Plus, CS 123T, CS 1226T Plus, CS 120P

Also referenced as Extron ATB220, ATB-220, part number 70137501.