Midas XL-3

Mixer Details

This is just one of over 75 professional audio mixers covered in The Mixer Output Guide, which describes direct outs, inserts, hidden mods and more. To see the rest, and for definitions, visit The Guide.

Direct Out: 
See Notes
TT patchbay?

The XL-3 has 16 mix sends on each mono channel (8 stereo sends on each stereo channel), which could be used for recording. Each mix send knob has a "pre" button to tap signal before the VCA fader. Each of these busses can be sent to a corresponding XLR output via the group output section (only if the "ST" button is not engaged on the group master?).

(From a service manual dated 1995) Direct output buffer: When fitted, this buffer can be assigned pre or post fade by inserting the appropriate link in ST6. It is built around IC20 as a unity-gain, phase-contrasting amplifier whose common mode rejection ratio is set by VR5 [typically 85dB at 100Hz]. Diodes D53, D54, D55 and D56 are provided to protect the direct output circuitry from damage by excess voltage. The output is routed via connector A17 to the channel direct out socket on the mixer rear panel.

Record Output [Diagram XL320_2.DGM]:
The record outputs share one level control and one level check switch [which overrides whichever input has been selected by the meter changeover switch S8 on diagram XL320_3.DGM]. The controls are linked by the ribbon connector between ST2a on the lower (left) PBC and ST2b on the upper (right) PCB, but in all other respects each output is entirely separate. Signal is derived from the wiper of the master mute switch S4 [diagram XL320_3.DGM] and fed to the top of the level control RV3a (left) or b (right), from the wiper of which it passes through a non-inverting buffer IC14b. From here the signal is fed both to the check level switch S9a or b via C66, and to the output stage IC11a, which is protected from excess voltage by the diode bridge D25-28, and set for maximum common mode rejection at 100Hz by VR7 [typically 85dB].

From the Owner's Manual: "Insert Signal is always available through the insert send patchpoint on the TT patchbay, however to be able to receive [the input module's INS] button must be engaged. The insert send and return is electronically balanced."

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