Tube Works 1160 User Manual

1160
MosValve Power Amplifier
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.

Tube Works 1160 Specifications

Power

output power per channel	80 watts RMS at 4 Ohms
power requirements	115/230 VAC, 200 Watts

Sound Characteristics

signal to noise ratio	Better than 95 dB at 8 ohms
hum & noise	Better than -65 dBm @ 8 ohms
presence control	+8 dB @ 10KHz

Physical Dimensions

size	3 1/2"H x 19"W x 7"D
front panel clearance	1 1/2" from handles to front panel
weight	13 lbs.

Summary

Technical Specifications

Output Power

Specifies the power output per channel at 4 Ohms, with both channels driven.

S/N Ratio

Details the signal-to-noise ratio, measured at 8 ohms.

Hum & Noise

Defines the hum and noise level, specified at 8 ohms with controls at maximum.

Sensitivity

Indicates the input sensitivity required for rated output, measured in dBv.

Input Impedance

States the input impedance of the amplifier, noted as unbalanced.

Presence Control

Describes the range of the presence control, specified in dB at 10KHz.

Power Requirements

Specifies the voltage and power consumption requirements.

Cooling System

Details the type of cooling system employed by the amplifier.

Protection

Outlines the protection features implemented in the amplifier.

Size

Provides the physical dimensions of the amplifier in rackmount standard.

Front Panel Clearance

Specifies the required clearance from the front panel handles.

Weight

States the overall weight of the amplifier unit.

Warranty Information

Warranty Period and Coverage

Details the 3-year warranty against defects in materials or manufacturing.

Warranty Exclusions

Specifies that damage due to modification or abuse is excluded from warranty.

Return Merchandise Authorization

Explains the requirement to obtain an RMA number before returning for service.

Important Warnings and Liability

User Agreement and Liability Release

Operation implies agreement to release liability and hold harmless the manufacturer.

Qualified Personnel Requirement

Only personnel familiar with high-powered audio equipment should operate the device.

Manufacturer's Sole Responsibility

Manufacturer's responsibility is limited to warranty on specified performance under normal conditions.