Decware TORIIMONO Owner's Manual page 11

O W N E R S M A N U A L
Source switch - continued.
When looking at the amplifier from the front, as in the picture on the previous page,
moving the source switch towards you will select the XLR jack on the right, which is the
one directly next to the RCA jack. Moving the source switch to the rear position selects
the other XLR jack.
After you have your source connected to the amplifier and music playing, slowly raise
the volume control on the front to the desired listening level.
Preamps
If you plan to use a preamp, you will end up with basically a volume control on the
preamp and a gain control on the amplifier. This is a huge advantage over having an
amplifier without a gain control. You'll want to experiment with where best to set the
gain control on the amplifier. Start with it set all the way up - same thing as not having
a gain control. Then experiment with turning the gain control down and the volume
control on the preamp up to compensate. You'll find this adjustment can have a big
effect on the sound. Just go with what works and sounds best to you.
Remember, the audio chain can be no more transparent than the weakest link in the
chain... sometimes this can be a preamp. The way to tell is to listen to the amps with
and without a preamp and see if there is a detectible veil over the music when the
preamp is used.
OUTPUT TUBE MATCHING TIPS
The meters on this amplifier can be used to see tubes age and monitor their
performance. If you find that you have to adjust the bias balance control almost all the
way to one side to achieve balance that means the tubes no longer match in so much
as one has become weaker in output than the other. This would be a good time to
replace the tubes.
Don't be fooled! The input tube (small 9 pin tube closest to the front of the amplifier) is
of critical importance to the matching of the output tubes. It too must be reasonably
well matched from side to side (the small tubes actually have two sections inside them
whereas the large output tubes have only one section inside).
If you find yourself have unexplained trouble getting output tubes to match, or the
meters dance wildly when music is played it is an indication that the front input tube
should be replaced. Once replaced, the output tubes may balance up fine.
Decware High Fidelity Engineering Co., East Peoria IL, USA www.decware.com