3 YEAR LIMITED
WARRANTY
Your TUBE WORKS product is warranted for a
period of three years from the date of purchase
when purchased from an authorized Tube Works
dealer. Tubes are warranted for a period of 90
days. This warranty does not cover normal wear
and tear incurred from normal designed use of the
product or use or performance beyond its intended
design. Warranty cards must be registered with
Tube Works within 10 days of original purchase.
This warranty covers parts and labor only; shipping
charges remain the sole responsibility of the owner.
Before returning any product for service, a Return
Merchandise Authorization Number (RMA#) must
be obtained by calling 480-941-0705 during normal
business hours.
Please refer to the product warranty card for com-
plete warranty restrictions and guidelines.
Tube Works
7200-12
7200-15
M o s V a l v e
Bass Combo
OWNERS
MANUAL
IMPORTANT FEATURES
¨ 130 Watt @ 8 ohm/200 Watt @ 4ohm
MosValve power
¨ F.E.T. or TUBE preamp operation
¨ 4 band E.Q. Section
¨ Unique Contour feature
¨ “Dynamic Response” Limiter
¨ Hand built and manufactured
¨ Powerful, dynamic woofer and tweeter com-
binations
¨ Quality cabinet construction w/ black car-
peting for durability
Look to this new model for
unique features and
powerful,dynamic response
for bass reproduction.
Tube Works
a division of
GENZ BENZ ENCLOSURES
7811 E. Pierce St.
Scottsdale,AZ 85257
480-941-0705
Fax 480-946-2412
WARNING!!
The use and operation of this device
constitutes an agreement of full release of any
and all liability connected with such use. Only
personnel familiar with the safe use and
operation of high-power audio equipment
should attempt to operate this device.
In addition, by the use of this device, user
agrees to hold both Genz Benz/Tube Works, its
designers, sales agents and all other affiliates
and related parties harmless in the event of
any accident, damage or loss resulting from
such use.
Manufacturer’s sole responsibility is to provide
a warranty on the specified performance of the
product under normal conditions.
FRONT PANEL FEATURES
TUBE/F.E.T. SWITCH Selects either the TUBE or F.E.T. preamp.
Generally speaking, TUBE will give a slightly fatter, more colored tone with
slightly more distortion and decreased headroom at high volume settings. F.
E.T. offers the quietest, most accurate and tightest response.
INPUTS Input 1 is +6db for passive basses and Input 2 is set @ 0db for
active basses. NOTE: Inputs are summing, allowing for two instruments of
similar outputs to be successfully summed.
VOLUME Controls gain through the input preamp (either TUBE or F.E.T.)
LIMITER Averages input signal levels to increase headroom and help
prevent excessive speaker bottoming due to large signal transients. The
unique quality of this type of limiter is that it still retains dynamic
response even at high (numerical) settings. Limiting will increase as the
control is moved towards “10”. The associated red LED will indicate limiter
activity on a continuous basis. The Limiter is cancellable via a rear-panel
foot switch jack or by setting the control to “0”.
CONTOUR Forms a gentle over-all bass response slope across the most
active bass frequencies. This is very useful in compensating for stage size
and room acoustics.
LO Controls and shelves frequencies in the extreme low-end of the
spectrum of 150 HZ and less.
LO MID Controls frequencies between 100 HZ and 400 HZ.
MID Extremely wide-range control of frequencies between 400 HZ and
1500 HZ.
HI Shelves and controls frequencies of 1500 HZ and higher. NOTE: These
EQ controls are interactive. There is mild reaction between the controls
including some phase shifting. This results in continuously variable
coloration of your tone including aural enhancement.
MASTER Controls input gain to the power amp section. For best signal-
to-noise ratio set the input volume relatively high and use relatively lower
settings of the Master volume. The Limiter is more active with higher input
settings as well.
EFFECTS MIX This control mixes the signal at the “Effects In” jack on
the rear panel. Rotating the control towards “EFX” mixes more of the effect’s
sound, while “Dry” mixes more of the pre-effect signal to the power amp.
POWER
Supplies mains power to the amp. Be certain that the proper
voltage is supplied to the amp. The rated voltage for your unit is indicated
on the rear panel. The green LED is the power indicator.
REAR PANEL FEATURES
VOLTAGE SWITCH This amp is equipped with a dual voltage
transformer. In the USA, always use the 115V position. For Europe, use the
230V position and the correct fuse value.
POWER INLET SOCKET USA: Connect only to 110-120V, 60Hz
receptacle with the detachable power cord supplied. Always use a grounded
outlet to avoid operating problems and to increase safety margin.
FUSE Use fast-blo 4 amp for 120V US versions or 2 amp for 220-240V
versions. Always replace with the same type and size fuse.
SPEAKERS Use these jacks for speaker output only. Minimum total
impedance is 4 ohms. Lower impedance operation is not recommended ,
and may eventually overheat and damage the amp.
Note: RMS Power: 130 Watts @ 8 ohms/200 Watts @ 4 ohms.
LINE OUT Attenuated signal from the output of the amp. All of the tone of
the amp, including the output is available at this jack. Potential applications:
Slaving to another combo or power amp and recording. This output is
isolated from the chassis ground to help prevent ground loops.
LIMITER CANCEL This jack provides for a simple shorting-type
footswitch operation of the Limiter.
EFFECTS LOOP This system provides ultimate flexibility and control for
your effects, regardless of type. Special note for proper use of the effects
loop: “SEND” with as much level as you can without distorting the effect.
“RECEIVE” with the minimum level possible to reach unity gain with or
without the effect activated.
PRE EQ/POST LOOP SWITCH Selects the output mode of the
“Preamp Output” balanced connector. “Pre EQ” setting will send the amplified
preamp output-Volume control output- directly to this connector. The F.E.T. or
Tube will be included in this setting, but no EQ or effects. “Post EQ” setting
will include all front-panel controls include the Effects Loop setting.
DIRECT OUT True balanced output of the bass signal useful for sending
direct -to- board signals through long snakes. The impedance on both this
and the previous output is less than 200 ohms and completely balanced.
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