Troubleshooting; Technical Specification - Joemeek TwinQ User Manual

14

Troubleshooting

1) No Power (no lights work)
• Is the power supply plugged in (both ends)?
• Is the mains power on?
• Is the mains voltage set correctly for your region?
• Has the mains fuse blown?
2) The microphone doesn't work
• Is it connected to the correct (XLR) input on the rear panel?
• If it is a condenser microphone, is the phantom power switched on?
• Is the 'Line' switch out (LED off)?
• Is the 'Input Gain' control turned up?
• Is the 'Output Gain' control turned up?
3) The line input doesn't work
• Is the source connected to the correct (jack) input on the back of the unit?
• Is the 'Line' switch in (LED on)?
• Is the 'Input Gain' control turned up?
• Is the 'Output Gain' control turned up?
4) The compressor doesn't work
• Is the 'Comp' switch in (LED on)?
• Is the 'Compress' control turned up enough?
• Is there enough signal, as set by the 'Input Gain' control, to drive the
compressor?

Technical Specification

Input impedances
Pre-amp overall gain
Common mode rejection
Equivalent input noise
Distortion
Frequency response
Maximum input before clipping
Headroom before clipping
High Pass Filter
Compressor threshold
Compressor ratio
Compressor attack time
Compressor release time
15
Mic: 1.2kohm; Line: 20kohm
0dB to 60dB
70dB
-128.5dBu (unweighted)
0.001%
(below Compressor threshold)
15Hz to 70kHz (-3dB)
Mic: +21dBu; Line: +45dBu
+21dBu
12dB per octave cut below 80Hz
-6dBu to +22dBu (variable)
1:1 to 10:1 (variable)
1 msec to 100 msec (adaptive)
0.1 sec to 3 sec (adaptive)
5) Too little or too much compression
• Turn the 'Input Gain' control up or down respectively, to adjust the
signal level to the compressor
6) The Meequalizer doesn't 't work.
• Is the 'EQ' switch in (LED on)?
• Is 'Input Gain' control turned up?
• Is 'Output Gain' control turned up?
7) Too much noise
• Is the 'Input Gain' control too high? Try moving the mic closer to the
source
• Is the 'Output Gain' control too high (eg: when lots of compression is
being used)?
• Is there too much EQ boost?
• Is the noise already present in the input signal? (Try removing the input)
8) Sounds distorted
• Is the 'Input Gain' control too high?
• Is the 'Output Gain' control too high?
• Is there too much EQ boost?
• When using the compressor, is the Release control set too low?
EQ Boost and Cut +/-15dB (zero phase-shift bell response)
LF Frequency 40Hz to 650Hz variable
MID Frequency 300Hz to 5kHz variable
HF Frequency 6kHz or 12kHz selectable
Nominal output levels +4dBu/-10dBv
Output impedance 75ohm
Output Level switch 12dB attenuation
Noise Floor -85dBu (typical, with ~40dB mic gain)
VU Meter Analogue movement
Power supply 115V / 230V ac mains, 50/60Hz
Power consumption 30W
Mechanical 482W x 88H x 220D (overall)
Weight 3 kilos