Tube Works 1160 Owner's Manual

OWNER'S MANUAL
Congratulations on purchasing the most innovative audio amplifier on the market today. The
Model 1160 incorporates a patented MosValve circuit designed by B. K. Butler. The MosValve
power amplifier is a Class A design that emphasizes even order harmonics, which are very
pleasing to the human ear. This design makes the Model 1160 an excellent choice for instrument
amplification, including guitar, bass, keyboard and P.A.
This amplifier was designed primarily for musical instrument and sound reinforcement ampli-
fication. It is an addition to your audio rig which will add warmth and definition to your sound.
Use the MosValve 1500 with any preamp capable of producing 450 mV into a 50K load
(Virtually any preamp).
Use with speakers or cabinets capable of at least 80 watts RMS continuous power. Remem-
ber that the 1500 can produce in excess of 100 watts/channel under typical stage conditions.
At least 100 watt speakers or cabinets are therefore HIGHLY recommended if you intend to
use the amp at high power output.
MANUFACTURER IS NOT RESPONSIBLE FOR ANY SPEAKER FAILURE WHILE USING
THIS EQUIPMENT.
This is a stereo power amp. Mono operation is switchable (both input channels bridged) with
the use of Channel A inputs only. Stereo operation is automatic when an additional input is
plugged into Channel B.
It is often advisable to use only one channel for mono (for example, if you are using only one
speaker cabinet), as the 1160 will produce over 100 watts into a 4 ohm load with only one
channel driven. Use Channel A, and set Channel B controls to "0". NOTE: It will not damage
Channel B to have no speaker plugged into it while using only Channel A.
The Presence control is "Flat" when set at "5". Turning the control clockwise increases high
frequency response, to a maximum of +8dB @ 10kHz. Turning the control counter-clockwise
decreases high frequency response, to a maximum of -8dB @ 10kHz.
NEVER attempt to power bridge the two speaker output channels together. NEVER parallel
or series them into one speaker or cabinet. If power from both channels is to be used, AL-
WAYS use at least two separate speaker systems (one per channel). ALL WARRANTIES
WILL IMMEDIATELY BECOME VOID IF ANY ATTEMPT AT POWER BRIDGING OR SE-
RIES/PARALELL OUTPUT CONNECTION IS MADE!
A certain amount of heat during operation is normal. The 1160 is biased in a manner in which
some heat will be present even while idling. It is best to keep the amp towards the bottom of
the rack (coolest air) and avoid blocking the vents on the case. NEVER DISABLE THE FAN!
Do not connect loads lower than 4 ohms per channel
1160
MosValve Power Amplifier
.