Rated 4.9 (120 reviews)
The TOA A-3648D is a 480W Class D mixer amplifier with seven inputs, built-in DSP and a 2-zone speaker selector for 100V line or low impedance speakers. It adds a feedback suppressor, speaker EQ, assignable input priorities, a pre-announce chime and a web browser interface for remote set-up and diagnostics. It is used for paging and background music in schools, offices, supermarkets and other commercial buildings.
480W
Class D
7 inputs
4 mic + 3 aux
2 zones
Plus direct
Web
Browser control
Features
480W Class D output, 100V line or 4 to 16 ohm
2-zone selector plus direct output, up to 480W per output
7 inputs: 2 mic/line, 2 mic, 2 mic or line (switchable bus), 1 AUX
24V phantom power on mic inputs, switchable
Two input buses for separating paging and music
Feedback suppressor with dynamic filters
3-point speaker EQ, bass and treble controls
Assignable input priorities and built-in chime (1, 2 or 4-note)
Web browser interface over LAN for remote control and diagnostics
Remote volume input, zone control and emergency I/O
Specifications
| Rated output | 480W |
| Amplifier | Class D |
| Speaker output | 100V (direct, zone 1, zone 2, total 21 Ω) or 4 to 16 Ω, removable terminal block |
| Frequency response | 50 Hz to 20 kHz ±3 dB (1/8 rated output) |
| Distortion | 1% or less (1 kHz, rated output) |
| S/N ratio | 88 dB (master min), 76 dB (master max), A-weighted |
| Tone controls | Bass ±10 dB at 100 Hz, treble ±10 dB at 10 kHz |
| INPUT 1, 2 | -60 dB mic / -20 dB line, 600 Ω, balanced, terminal block, 24V phantom |
| INPUT 3, 4 | -60 dB, 600 Ω, balanced, terminal block, 24V phantom |
| INPUT 5, 6 | Mic (-60 dB, balanced, terminal block) or line (-20 dB, RCA), selectable |
| INPUT 7 | -20 dB, 10 kΩ, unbalanced, 2 x RCA |
| Power amp in | 0 dB, 600 Ω, unbalanced, RCA |
| Outputs | Rec out and 2 line outs, 0 dB, 600 Ω, RCA |
| Control inputs | 4 channels dry contact, remote volume, zone control |
| Control outputs | Power remote, emergency, zone control; open collector, 30V DC, 25 mA |
| Chime | 1-note, 2-note, ascending 4-note or none |
| Power source | 100 to 240V AC, 50/60 Hz |
| Power consumption | 601W at rated output, 113W (EN 62368) |
| Operating temperature | -10 to +40°C |
| Dimensions (W x H x D) | 420 x 96.1 x 313.1 mm |
| Weight | 5.2 kg |
| Options | MB-25B rack kit, PF-013B perforated panel |
