Input Ground Bypass Jumper; Output Ground (Pin 1) Bypass Jumper; Single Ended / Balanced Jumpers - Channel D Lino Installation And Use Manual

The Pure Vinyl User Guide includes complete information on setting the proper preamplifier gain for
transferring LPs to digital files (with an external ADC - not included). Briefly, you should aim for "Dry"
signal level peaks in Pure Vinyl between -20 and -4 dBFS, for the music that you usually play.
Provided that peaks usually reach these levels, it's not necessary to have to adjust the gain setting
frequently, or at all. It's prudent to allow at least 4 to 6 dB of headroom below full scale, to accommodate
unexpectedly loud modulation levels. (At the low end of the suggested signal range above, be certain that
a signal peak represents music and not "pops" or "clicks," which also should remain below 0 dBFS at the
high amplitude end of the signal range.)
If your audio interface permits setting nominal input signal levels to consumer or professional
format (true of professional audio interfaces from Lynx, RME, etc.),
setting, in conjunction with the minimum gain setting on the Lino.
•
If signal levels are too high, set the input of the audio interface to professional ("+4 dBu")
format.
•
If the levels are too low, increase the gain on the Lino. (For monitoring / playback, if the output
levels of your interface can be adjusted independently of the input levels, use the +4 dBu setting
for the output.)

Input Ground Bypass Jumper

The internal ground jumper bypasses (in the bridging position) the 100 ohm local ground isolation input
resistor (connected between XLR Pin 1 and circuit common) directly to common. This may provide more,
or less, "hum" immunity, depending on your other equipment. Factory setting is with the jumper
bridged.
Output Ground (XLR Pin 1) Bypass Jumper
The output ground jumper bypasses (in the bridging position) the 100 ohm local ground isolation output
resistor (connected between XLR Pin 1 and circuit common) directly to common. This may provide more,
or less, "hum" immunity, depending on your other equipment. Factory setting is with the jumper
bridged.
Single Ended / Balanced Input Jumpers
Two jumpers marked on the circuit board as S.E. are used to configure the Lino for single ended or
balanced operation. In single ended operation, the negative cartridge terminals are connected to circuit
first try the consumer ("-10 dbV")
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