Quicksilver Audio SET Mono Amplifier
Operating Instructions
Thank you for purchasing the Quicksilver Audio SET Monos. Simplicity and affordability are what these
amplifiers are all about. Enjoy!
The Single Ended Triode Mono Amp achieves a transparency and clarity that is not possible in
push pull designs. This will be most evident on high efficiency speakers (greater than 100db 1
watt 1 meter).
INITIAL TURN-ON
Insert the tubes in their proper sockets. It may be difficult to insert the KT88 the first time. Gently move
it back and forth a few times in the socket until you feel the pins move into the socket; then push the tube
down firmly into the socket. If the tube pins are not properly lined up in the socket before you push the
tube in, you may bend the tube socket pins. Connect the amp into the system and turn it on. The amplifier
is self-biasing so no adjustments are necessary.
FUSE BLOWING
If the 1.5 amp (slo-blo) fuse blows, replace it with no larger than a 2 amp fuse. If the fuse continues to blow
an output tube could be damaged; or there may be other problems, such as poor system grounding, an
unstable preamp, a shorted speaker, etc. Interchanging the cables between channels can help determine
if the problem is in the system or in the amp.
TROUBLE SHOOTING
I
f the sound from one amplifier is distorted and you suspect the amp, switch output tubes between
amplifiers to determine if an output tube is bad.
TUBE REPLACEMENT
The SET Mono␣ is sold with a KT88 output tube; but EL34s, KT77s, KT66s, 6L6s and 6550s can also be used;
however both output tubes must be the same type. Output tubes must be replaced as a matched pair and
should be purchased through Quicksilver Audio or a Quicksilver dealer. Quicksilver output tubes are
“burned-in” for 10 hours prior to matching, and their performance is guaranteed.
The small tube in the SET Mono is a 6H30 and should only be replaced with that number. Other types
should not be used.
The 5AR4 rectifier tube has a slow warm up feature and should not be replaced with substitutes.
SPECIAL FEATURES
The Quicksilver SET Mono uses no circuit boards or transistors. It is hand-wired, uses gold-plated input
and output connectors, and has a very high performance output transformer.
