What is the pinout for the PS-3 power supply?
There are two separate AC supplies coming out of the PS-3: 8.5 VAC @ 1A and 34.5 VAC CT @ 250mA. Pinout is as follows: 8.5 VAC on pins 6 and 1, 17 VAC on pins 7 and 3, center…
: 372 SPL Computer
Can my Symetrix-manufactured unit normally powered by the PS-3 be battery powered for remote use?
No, the only option would be to use a 12VDC to 117VAC inverter with the supplied PS-3 inline power supply.
Why is the audio output of my 372 SPL Computer being interrupted?
Because the 372 SPL Computer uses the speakers of a sound system as sensing microphones, the sound?system is briefly disabled (~250 milliseconds) every time a reading is taken.
When do I need to use an external relay on my 372 SPL Computer?
When controlling amplifiers larger than 200 watts (8-ohms), you must use an external DPDT relay. The 372 SPL Computer's internal relay cannot handle more than 8-amps of load current. The recommended maximum amplifier wattages are as follows: 300 watts at…
How do I reset the 372 SPL Computer to the factory default settings?
After a lightning strike, flood, nuclear blast, or other catastrophic disturbance, the 372 may become inoperative if the data stored in its EPROM memory has been corrupted. The 372 can be returned to its factory default state by performing a…
Why are my Master and Slave 372 SPL Computer units not sensing at the same time?
When the 372 SPL Computer does a sense event it fades the audio down from its current gain setting to -80dB at X amount of time per dB, then opens a relay and takes a series of samples via the…
Why slave 372 SPL Computer’s together?
The main reason to synchronize the sense events between units is to eliminate acoustic bleed-over between adjacent zones, and/or to eliminate problematic speaker line crosstalk while the sample is being taken.
How does the averaging time work on the 372 SPL Computer?
The 372 SPL Computer can be set to 1, 2, 4, or 8 and average together the number of samples to make a gain changes. After a calibration the sample buffer is cleared and set to the same relative level…
372 SPL Computer displays gain as 0 dB, but it still seems hot.
See if the AGC is active, this is applied independently of the SPL functions and will not show as a gain change.
Where can I find a Flow Chart for the 372 SPL Computer?
372 Flow Chart
