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Why? Any amplifier circuit is limited in its transient response by the available current. In common with most
desks of this size, the EURODESK has more than a thousand line-level operational amplifiers (op-amps)
inside. When being driven hard, many desks begin to show signs of stress due to power supply limitations. Not
so with the EURODESK MX9000. The sound should stay clean and crisp and TIGHT right up to the operating
limits of the op-amps themselves.
+ Do not connect the PSU to the EURODESK while the PSU is connected to the mains supply.
3. INPUT/OUTPUT CHANNEL
3.1 Channel strip
On the EURODESK MX9000 the 24 INPUT + OUTPUT (I/O or normal) channels cover most of the console.
Most of each strip is occupied by the main or A-CHANNEL, accepting MIC, LINE or TAPE inputs, depending
on the positions of S1 and S3 (see fig. 3.1 and 3.2). Each channel strip also sports a secondary B-CHANNEL
(fig. 3.6) Anything routed to a B-channel is directed to a separate MIX-B bus. (See section 3.7 B-channel and
also section 6.2 MIX-B master).
3.2 Input switching
First, look at the MIC/LINE switch S1. In the UP position it selects MIC, in the DOWN position LINE. The next
switch S3 chooses whether A-channel looks at INPUT or TAPE. If INPUT is routed to A-channel, TAPE is
offered to B-channel. If TAPE is routed to A-channel, INPUT is offered to B-channel. Depressing the PAD
switch (S1a) lowers an incoming mic signal by -20 dB, if necessary.
Fig. 3.1: Input
When laying tracks, it is usual to use the MIX-B inputs for monitoring the signal from TAPE, while the
A-channels take care of microphones, Dls, etc. For MIXING purposes, TAPE tracks are normally flipped
onto the main channels, leaving the B-channels free for other applications, such as offering extra line inputs.
These rules are, however, made to be broken.
S23 applies to the B-channel only and replaces the normal TAPE or INPUT source with a tap from the main
channel, taken post mute and pre fader. Now MIX-B acts as an extra stereo aux send or extra stereo mix. You
should remove MIX-B from the main mix (via S48, master section) in this configuration.