Owner's Manual

Parasound
®
ZoneMaster
™
2350 Owner’s Manual Page 17
Frequently Asked Questions
The unit will not turn on
- Check the setting of the Turn On Options switch (The front panel Power button is disabled if the switch is
set to Audio or 12V).
- Check that the AC power is live and that the rear panel master power switch is turned on. When the AC
power is live and the unit is turned off, the Power button will illuminate red.
When using the audio trigger the amp is turning off during quiet listening
- Turn down both channels’ Level controls (12 o’clock is a good place to start).
- See page 10 for more details.
The amp never turns off when using the audio trigger
- The audio trigger circuit might wait for up to 15 minutes before shutting the amp off. Try waiting at least
15 minutes after stopping the audio source.
- Ensure that the Turn On Options switch is set to the “Audio” position.
- If the amp still will not turn off then you may have too much residual noise (hiss or hum) in the audio
signal path. You must eliminate the source or cause of this noise. If you are unable to do this you might
have to resort to using the 12V trigger or the manual Turn On mode.
There is no sound coming from the speakers
- Ensure that the A and B buttons are turned on (pushed to their inward position)
- Ensure that the Output Mode switch is not set to Sub (unless driving subwoofers)
- Ensure that the High Pass switch is not set to 30 Hz or 80 Hz while the Output Mode switch is set to Sub.
- Turn up the Level Controls
The 1 and 2 indicators are not illuminating or the Protect light is illuminating red
- Check speakers and speaker wires for short circuits.
- Ensure that you have not combined the negative (-) terminals of any of the speaker outputs.
- You may have attached a combined speaker load that is below the 2350’s 2 ohm minimum. The
combined speaker load for that channel is the combined parallel impedance of one channel A and B
outputs. If one 4 ohm speaker is attached to the A speaker terminal and another 4 ohm speaker is
connected to the B speaker terminal then that amp channel will “see “only 2 ohms. The combined A and
B impedance for either channel should never be below 2 ohms.
- The amp may have overheated and will not resume operation until it cools down. Ensure that you have
provided adequate ventilation especially when driving low impedance loads.
- See page 7 for more details.
Why is there no sound when using the Speaker Level Input?
- Ensure that you have connected the correct polarity at both ends of the speaker wire.
- Try reversing the speaker wire polarity at only one end.
Why does the sub have such weak output or I can hear only very low frequencies?
- If you are using the Sub Out RCA jack with a powered sub, make sure its built-in crossover is turned off
(or use the Mono Full Range RCA output jack). With “double-filtering” you’ll hear very little bass.