Hall Research, AMP-7040, 40 Watt Audio Amp for 70V or 100V Systems with RS-232 Control
The AMP-7040 is a compact, economical and energy efficient (Class D) stereo to mono audio amplifier at 70 V or 100 V with 3 inputs (2 line in and 1 balanced microphone). The Versatile design is compatible with dynamic, condenser or wireless microphones with fully adjustable control options including RS-232, IR, and front panel buttons. Functions include EQ control and microphone mixer.
Features:
- Two stereo analog audio inputs and one digital audio input, selectable by buttons, IR remote, or RS-232
- MIC port supports balanced or unbalanced signals
- MIC input supports 48V phantom power, dynamic MIC and wireless MIC
- Amplified output is switchable between 70V and 100V
- Mono audio output at 40 watts
- Supports "Ducking" function
- Addressable RS-232 ports so up to 16 amps can be controlled from one RS-232 port
- Volume / Bass / Treble controllable by buttons IR remote and RS-232
- 3.5mm jack line audio output with controllable volume
- Mono mix switch for summing left and right channels for driving mono outputs
- Microphone input can be mixed with line input and each can be controlled separately
- Auto noise squelch. Detects audio on inputs and mutes the output when there is no input
For more information, please see 
Data Sheet
