Specifications

Model 9762 – Dual Combo Owners Manual
6 The Controls
1. +24V Status Indicator
This LED indicates +24V power status for each channel. If both channel power LED’s fail to
light when the unit is powered on, check to make sure the AC outlet and line cord are working
properly, otherwise, check the AC line fuse on the rear panel of the unit. If a channel fails to
indicate power status, it is possible the internal thermal fuse has tripped and the unit may
require servicing.
2. Direct Input (DI) – Unbalanced
The Direct Input is designed for use with instrument sources and is buffered by a Hi-Z FET
stage to avoid instrument pickup loading. The input connector accepts standard ¼“ Phone
Plugs in either TS (Mono – TIP, SLEEVE) or TRS (Stereo – TIP, RING, SLEEVE). Note that
when TRS connectors are used, the RING and SLEEVE are both referenced to ground
internally. The DI input may also be used as an unbalanced direct input, however, line level
+4 dBu signal levels will most likely result in distortion. In this case, the signal level should be
reduced from the source.
3. DI Source Enable
The DI switch selects the preamp input signal from either the unbalanced DI input jack or the
balanced Microphone Input connector on the rear panel. The DI input jack is selected in the
depressed position; otherwise the balanced XLR microphone input connector is selected.
Note that the DI switch may also serve as a “MUTE” switch when only one input source is
being used.
4. Signal Present (SP) Indicator
The SP LED indicates signal activity on a channel. The detector is sourced from the gain
blocks prior to the line amplifier and output LEVEL control. The LED lights around 200mV
peak-to-peak (approximately –20 dB referenced to 775 mV).
RTZ Professional Audio