The AV62 mixer provides a cost effective solution for installed or mobile sound systems that integrate microphones and visual presentation equipment. The unique stereo/mono bus structure maintains stereo separation for presentations and allows the microphones and program signals to be mixed and/or routed to either the stereo or mono outputs as needed. The microphone inputs participate with other microphones in the automatic mixing algorithm of the AM8 mixer, if one is used in conjunction with the AV62.

The design uses a straightforward analog signal path to provide excellent audio performance. Enhanced signal routing and mixing capability make the AV62 far more versatile than a simple routing switcher. For example, line level sources may be mixed together for multi-media presentations.

The microphone preamp is a low-noise discrete design, which is extensively RF protected. The preamp has three gain settings. The 0dB setting allows an input to accept line level signals, while the +30dB and +50dB gain settings accommodate both low and high sensitivity microphones. 15V Phantom power is provided for each channel, and is always active. The two mic inputs have individual level controls. The post level control signals are summed, and passed on to the tone control circuitry. From there, the signals are distributed to the various outputs according to the user's setup.

Six Line In Select pushbuttons allow line level audio sources to be selected when the AV62 is in the Local mode. The AV62 may be programmed to allow only one audio source at a time or any number of audio sources. Six Remote Line/Memory Select terminals are available on the rear panel 9 pin D-Sub connector that replicate the function of the front panel pushbuttons for remote control applications. In addition, both the Program and Mono output levels may be remotely controlled individually using a 10K linear pot.

Specifications and Features:

Program Input

• Type: Unbalanced RCA
• Impedance: 10K ohms
• Input Gain Range: +15dB to Off
• Maximum Input Level: +4dBu at maximum gain
  

• Type: Electronically balanced and RF filtered
• Impedance: Greater than 2K, any gain setting
• Input Gain Settings: 0dB, +30dB, +50dB
• EIN, 20-20KHz: -126dBu (+50dB gain)
• Maximum Input Level: +15dBu at 0dB gain, -15dBu at +30dB gain, -35dBu at +50dB gain

• Impedance: 200 Ohms balanced; 100 Ohms unbalanced
• Max output level: +26dBu, > 10k load balanced, +20dBu unbalanced
• Remote Level Control Range: 0dB to off for a resistance of 10K ohms to 0 ohms
• Serial Communication (RS-232): 9600 baud, 8 data bits, no parity, 1 stop bit

• Threshold: -15dBu to +25dBu(off)

• Mic Input to Mono Out: 72dB
• Program In to Program Out: 22dB