Owner`s manual

Front panel features

Mono Input channel features are identical for both the XR-20 and the XR-24. The XR-20

has 12 Mono inputs and the XR-24 has 8 Mono inputs.

Line Input (mic pad)

The input preamp circuit is set up to accept a mic-level signal. This signal is

brought in via the XLR mic-input connector located on the rear panel. The 1/4"

TRS input jack is disabled.

The input preamp circuit is set up to accept a line-level signal from either

the XLR mic-input connector or the 1/4" TRS input jack, both located on the rear

panel. Since the sensitivity of the input preamp is reduced, this control can also act

as a PAD for bringing a very hot microphone feed down to a controllable level,

avoiding overload. When a plug is inserted into the 1/4" TRS input jack, the XLR

mic-input connector is disabled.

Gain

The Input gain control is used to establish proper gain structure in the chan-

nel. For best results, use the Solo system to monitor the channel while you set

the gain. The goal is maximum gain without distortion. Both the main LED meters

(during Solo) and the channel’s Level/Peak indicator can be used for adjusting gain.

70 Hz high-pass filter

The high-pass filter reduces or eliminates unwanted low frequencies without sub-

stantially affecting the program material. Quite often such unwanted low frequen-

cies are included with mic- or line-input signals. For example, stage rumble or

wind can be picked up through vocal mics. The cut-off frequency of the high-pass

filter is 70 Hz and the slope is -18dB per octave.

HPF

High-pass filter is on.

Mono Input channel

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