operate an input with RCA (single-ended) connections. The XLR pins are
numbered, but you’ll have to look close, maybe with a hand lens.
There are two sets of balanced and single ended outputs on each channel,
designated “master” and “slave”. You may connect and use as many of these
outputs as you wish without degradation of signal. Each output is derived from it’s
own circuit element and is totally independent of any other outlet. On the XLR, pin 1
is ground, pin 2 is positive and pin 3 is negative.
The XP-30 also incorporates a “tape-loop” for those users who either record or wish
to insert a processor loop as a side chain. Tape out communicates directly back to
the input bus, bypassing the volume control. Tape out is always active, with one
exception, where Tape Out is isolated from Tape Input to avoid a feedback loop.
The tape loop is only available from the remote control and is selected or deselected
by a single keystroke of the “Tape” button on the hand remote. When tape is
selected from the hand remote, the display on the power supply shows a lower case
“t” on the right hand side of the display. When the letter “t” is showing, the tape input
is “selected” and all other inputs are “deselected”, regardless of any previous
settings you may have chosen. Pressing the “Tape” button a second time, cancels
the command.
Handy Features
The home theater “Pass-thru” command is simply a software setting that selects
input 6 and sets the gain to 0 dB with a minimum of keystrokes. The keystroke
shortcut selects input 6 and slowly advances the volume control to step 89, starting
from 0. The slow advance of level is intentional; 0dB (step 89) is appropriate for a
home theater processor, it is however dangerously high for most source
components. As the level advances the display will indicate each volume step with
the step number and the suffix L & R (Left and Right). Once the 0dB point is
reached the L & R suffix are superceded with a letter P (Pass-Thru).
At any time the volume advance for the Home Theater Bypass may be interrupted
by pressing any button on the hand remote other than the Pass-Thru button. Once
halted the volume may be manually set from either the front panel volume control or
from the volume up ^ and volume down v arrows on the remote.
Pass- Thru functionality may be over ridden allowing this input to be treated as
simply as an additional user addressable input. The slow advance of level allows
the user to safely cancel the incremented volume increase command and assert
manual control over the preamplifier output level.
When selected as an additional input the control chassis display will show this
selection as input 6 with the letters L (left) and R (right) as suffix’s to the level
setting.
The XP-30 has a single pair of binding posts on the power-supply / control chassis
which are labeled “Ext. Amp Turn-on”. A 12-volt DC signal is available at these
