Audio Input And Output Help - ETC ColorSource 20 User Manual

Audio Input and Output Help

Input Type
3.5mm (1/8") TRS, Stereo, unbalanced
Max Peak Input: -10dBV (316mV RMS)
Input Impedance: 29k ohms
Output Type
3.5mm (1/8") TRS, Stereo, unbalanced
Max Output : -10dBV (316mV RMS) at 10k ohms "Line Level"
Load Impedance : 10k – 200k ohms
Warning:
nection. Doing so may result in damage.
Warning:
power enabled. Doing so may result in damage.
Note:
poor sound quality will result.
Audio Input Tips
Line or headphone output of consumer or professional audio equipment is recommended.
If the input source level is too low turning up the input fader may produce noise. If the input level is
too high it may distort.
Audio Output Tips
Line level output is not suitable for connection to headphones. Although some sound can be heard in
headphones, and it may be useful from time to time, the volume and quality will not usually be sat-
isfactory.
Connection to a load with a lower impedance (fewer ohms) will result in distortion and loss of bass.
There is no upper limit for the load impedance, but very high impedance loads might result in some
noise being heard.
When possible connect directly to mixer or power amplifier "line level" inputs.
If the input impedance is less than 10k ohms it is advisable to insert a suitable pre-amplifier between
the console and the mixer/amplifier.
Preventing hum
When the ColorSource AV console is connected to external audio equipment, and some other peri-
pherals, audible hum may be produced. This is usually due to a phenomena known as a ground-loop
or hum-loop where several pieces of equipment are grounded independently and then also to each
other.
Ground loops can sometimes be cured by simple means including re-arranging the grounding of the
mixer/amplifier and source of sound. You should ask a competent electrician to perform any
changes of grounding as it could affect equipment safety.
AV Functions
NEVER connect the input if levels are directly from an amplifier or loudspeaker con-
NEVER connect the output to a balanced input that has 48V microphone phantom
The output is stereo unbalanced and should not be connected to a balanced input as very
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