Rocktron 250 User Manual

GUITAR POWER AMPLIFIER
U S E R ' S M A N U A L
U.S. Patents #4538297, 4647876, 4696044, 4745309, 4881047, 4893099, 5124657, 5263091, 5268527, 5319713, 5333201, 5402498 and 5493617.
May be covered by one or more of the following:
Other patents pending. Foreign patents pending.
! WARNING !
The Velocity® 250 is capable of producing extremely high sound pressure levels. The use
of ear protection is essential in situations when prolonged exposure to such high sound pres-
sure levels occurs. Failure to use caution and/or ear protection when using this amplifier may
result in permanent hearing impairment or hearing loss. United States Government guidelines
concerning safe noise exposure levels should be referred to before operating the amplifier at
high levels. The manufacturer is not responsible for any damage resulting from the use of this
product.
UNPACKING
Upon unpacking the Velocity® 250, save the carton and all the packing materials in case it
becomes necessary to ship the unit.
Be sure to thoroughly inspect your unit and its carton for any signs of damage that may
have occurred during shipment. If there are any signs of damage, contact your dealer immedi-
ately.
INSTALLATION
When installing the Velocity® 250 in your rack, it is best for ventilation and heat dissipation
that the unit occupy the bottom space of your rack. It is also recommended that a vacant
space is left above the power amp, if possible, to further improve ventilation.
OPERATING TEMPERATURE
Do not expose this unit to excessively warm or cold temperatures. This unit is designed to
operate between 32°F and 104°F (0°C and 40°C). This unit may not function properly under
extreme conditions.
The lightning flash with arrowhead symbol, appearing on the rear panel of the unit, is intended to alert the user of this product of the presence of uninsulated, dangerous voltage which may be of sufficient magnitude to constitute a risk of electric shock.
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,
DO NOT REMOVE COVER (OR BACK)
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
The exclamation point symbol, which appears on the rear panel of the unit, is intended to alert the user of this product to the presence of important operating and maintenance instructions in the accompanying literature.
NO USER-SERVICABLE PARTS INSIDE
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL
Copyright ©1996 Rocktron Corporation.
All rights reserved.
Contents
Contents
Introduction ...............................................................................................1
V elocity 250 Design ..................................................................................2
Front Panel ................................................................................................3
Rear Panel..................................................................................................4
Connections...............................................................................................5
Stereo Applications .....................................................................................5
Mono Bridged Applications ..........................................................................6
Operating Precautions ..............................................................................7
Power Output/Speaker Load ....................................................................... 7
Fuse Replacement......................................................................................8
Other Features ..........................................................................................9
Automatic Short Detection .......................................................................... 9
Definition Control.........................................................................................9
Specifications ..........................................................................................10
Your Velocity 250 has been tested and complies with the following Standards and Directives as set forth by the European Union:
Council Directive(s): 89/336/EEC Electromagnetic Compatibility Standard(s): EN55013, EN50082-1
This means that this product has been designed to meet stringent guidelines on how much RF energy it can emit, and that it should be immune from other sources of interference when properly used. Improper use of this equipment could result in increased RF emissions, which may or may not interfere with other electronic products.
To insure against this possibility, always use good shielded cables for all audio input connections. This will help insure compliance with the Directive(s).

Introduction

Introduction
Congratulations on your purchase of the Velocity® 250 guitar power amplifier! The Velocity 250 was designed to provide the greatest flexibility with the highest reliability, even under extreme operating conditions. This 2-rackspace amp will provide 125 watts/channel when used in stereo applications or 250 watts mono bridged into a 8 ohm load—without a cooling fan!
The Velocity 250 has a unique "Reactance" circuit that actually replicates the output impedance of tube amplifiers—so you can get the same great sound that a tube amplifier delivers in a reliable solid state design. And, because it is a variable control, you can customize your Velocity 250 to sound like any of your favorite tube amps. Best of all, this feature is available in the mono bridged mode too!
In addition, the Velocity 250 has "Definition" controls to give you that little bit of edge you need to bring your playing out in the mix. It also has automatic short circuit protection, which detects problems and shuts down the amplifier before any internal damage can be done. It also has massive heatsinks for cool, reliable performance.
Other Features:
• 115/230 VAC voltage selector switch.
• An AC power detect circuit, which ensures that the amplifier outputs shut down first when AC is removed. This will guard against any thumps or pops that could otherwise occur, potentially damaging speakers when power is cut to the amplifier.
• Differential input buffers to eliminate ground loop hum coming from the power amp.
• Over-temperature protection
• Rock-solid design to provide reliable, trouble-free use.
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