Quicksilver SET Mono Amplifier User manual

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
If 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.

SET Mono Amp:
DIAGRAM ON THE BOTTOM OF THE AMPLIFIER:
Quicksilver Audio SET Mono Amplifier
Bottom View
4 C 8
OUTPUT TUBE
EL34, KT88
or 6L6
INPUT
CONNECTOR
300K
OUTPUT
TRANSFORMER
INPUT TUBE
6H30
POWER
TRANSFORMER
POWER SUPPLY CAPACITORS
POWER
CORD
2
AMP
FUSE
POWER
SWITCH
Push up
to turn on.
SPEAKER
TERMINALS
C84
5AR4
Rectifier
OUTPUT TUBE
EL34, KT88
or 6L6
INPUT
CONNECTOR
300K
OUTPUT
TRANSFORMER
INPUT TUBE
6H30
POWER
TRANSFORMER
POWER SUPPLY CAPACITORs
POWER
CORD
2
AMP
FUSE
POWER
SWITCH
Push up
to turn on.
SPEAKER
TERMINALS
C48
RECTIFIER
TUBE
5AR4

WARRANTY
Quicksilver Audio warranties your new SET Mono Amplifiers for a period of 3 years from the date of
purchase (90 days on tubes.) Parts and labor are provided free of charge as long as the failure was not
caused by misuse, accident or negligence. Shipping to the factory is not included. Retain your packing
carton in case the unit needs to be returned for service.
Quicksilver Audio
11880 Upham Street # E
Broomfield, CO 80020
[phone]
www.quicksilveraudio.com
Specifications
Power Output 9 watts into 4 or 8 ohms
Power Bandwidth 20 Hz to 80 KHz
Damping factor 8
Hum and Noise 90 db below 10 watts
1 Watt IM Distortion simple order = 0.3%
all other products = 0.05%
Global Feedback none
Gain 14 db into 8 ohms
11 db into 4 ohms
Input Sensitivity 1.7 volts
Input Impedance 300 Kohms
Tube Complement 1 KT88, power tube
1 6H30 driver and input tube
1 5AR4 rectifier tube
Power Consumption 140 watts
Chassis Black with Chrome covers
Dimensions 8”x 14 3/4” x 9 1/4”
Weight 36 lbs. each
U.S. Warranty 3 years parts and labor