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Power-Tech Series  Power Amplifiers

Page 5

Reference Manual

1.1 Unpacking

Please unpack and inspect your new amplifier

for any damage that may have occurred during
transit. If damage is found, notify the transportation
company immediately. Only you may initiate a claim
with the carrier for shipping damage. Even if the unit
arrived in perfect condition, as most do, save all
packing materials so you will have them if you ever
need to transport the unit. 

NEVER SHIP THE UNIT

WITHOUT THE FACTORY PACK.

1.2 Features

Rugged, professional power amplifier built for the road.
Mounts in EIA standard 19-inch (48.3-cm) rack.

Quick-access front panel power switch and level
controls. Turn-on delay for loudspeaker protection.

The patented 

ODEP

®

 circuitry and 

Grounded Bridge

design combine to provide performance and reliability
that surpass all traditional designs.

Easy to read signal presence (SPI) and distortion
(

IOC

®

) indicator for each channel.

High damping factor provides superior control over
low-frequency drivers for a clean, accurate low end.

Safe with any load. Bridge-Mono and Parallel-Mono
modes make it easy to optimize the amplifier’s perfor-
mance for a wide range of loads.

Complete protection against shorted outputs, mis-
matched loads, overheating, input/output DC and high-
frequency overload; full internal fault protection.

Balanced phone jack inputs with internal three position
sensitivity switch and front-panel level controls. XLR
and barrier block input connectors are optional.

Efficient heat sinks and self-contained forced-air
cooling system dissipate heat quickly and evenly for
extra amplifier protection and greater output power.

Three year “No-Fault” full warranty protects your
investment and guarantees its specifications.

1 Welcome

Congratulations on purchasing a Crown 

Power-

Tech

 amplifier. 

Power-Tech amplifiers are compact,

professional stereo power amplifiers engineered to
meet the most demanding sound reinforcement
needs. They compare very favorably to more expen-
sive amplifiers, providing uncolored sound and signal-
to-noise ratios commonly associated with recording
studios.

This manual will help you successfully install and

use your amplifier—we strongly recommend you read
all instructions, warnings and cautions. If you plan to
operate in one of the two mono modes, be sure to
read the Mono section. Also for your protection,
please save your bill of sale since it is your

 official

proof of purchase.

Fig. 1.1  Power-Tech Front and Back Panels

Summary of Contents for POWER-TECH 1

Page 1: ...1000 U S A Telephone 219 294 8000 Power Tech amplifiers are produced by the Professional Audio Unit of Crown International Inc Trademark Notice Power Tech is a trademark and Amcron Crown IOC and ODEP...

Page 2: ...3 years from the date of purchase by the original purchaser the warranty period that the new Crown product is free of defects in materials and workmanship We further warrant the new Crown product rega...

Page 3: ...RE REMOVING BACK PANEL COVER TO ACCESS GAIN SWITCH IMPORTANT THE POWER TECH 1 AND 2 REQUIRE CLASS 2 OUTPUT WIRING THE POWERTECH 3 REQUIRES CLASS 1 WIRING IF USED IN THE BRIDGE MONO OR PARALLEL MONO MO...

Page 4: ...with the manufacturer s instruc tions 8 Do not install near any heat sources such as ra diators heat registers stoves or other appara tus that produce heat 9 Do not defeat the safety purpose of the po...

Page 5: ...perfor mance for a wide range of loads Complete protection against shorted outputs mis matched loads overheating input output DC and high frequency overload full internal fault protection Balanced ph...

Page 6: ...de the outputs are paralleled for twice the current capacity Bridge Mono mode is provided for loads with an impedance greater than 4 ohms Parallel Mono mode should be used with loads of 4 ohms or less...

Page 7: ...Power Tech Series Power Amplifiers Page 7 Reference Manual Fig 2 3 Three System Connection Methods...

Page 8: ...lly most sensitive to the heat from average RMS output power To protect your tweeters we recommend that you use a high speed instrument fuse like the Littlefuse 361000 series To protect your woofers w...

Page 9: ...protection and fuses or circuit breakers to protect the power supplies 3 3 1 ODEP Crown invented ODEP to keep the amplifier working under demanding conditions and to increase output efficiency To do t...

Page 10: ...draw that exceeds the breaker rating Again this should only be possible when operating outside rated conditions like when the amplifier is used to drive a 1 ohm load or when driving a severely clippe...

Page 11: ...um level setting Power Tech 1 54 1 12 or 35 dB 0 5 dB at 0 775 volt sensitivity 30 1 12 or 30 dB 1 dB at 1 4 volt sensitivity Power Tech 2 66 1 12 or 36 dB 0 5 dB at 0 775 volt sensitivity 36 1 12 or...

Page 12: ...el 1 controls are active Channel 2 controls should be turned down and not used Parallel Mono Unbalanced single channel Channel 1 controls are active Channel 2 controls should be turned down and not us...

Page 13: ...y are typical subject to manufacturing tolerances single channel driven or that they are specified with fuses bypassed Each of these statements effectively removes any performance guarantee In fact so...

Page 14: ...Power Tech Series Power Amplifiers Page 14 Reference Manual Fig 4 2 Power Tech 2 Minimum Power Matrix Fig 4 3 Power Tech 3 Minimum Power Matrix...

Page 15: ...ximum power matrices Maximum Power Notes All maximum power specifications are based on 0 5 regulated AC mains with THD of less than 1 0 and an ambient room temperature of 70 F 21 C International units...

Page 16: ...Power Tech Series Power Amplifiers Page 16 Reference Manual Fig 4 5 Power Tech 2 Maximum Power Matrix Fig 4 6 Power Tech 3 Maximum Power Matrix...

Page 17: ...em that uses standard XLR connectors It can also be used in systems that need to daisy chain an input signal from one amplifier to another Because the MT XLR connectors are in parallel with the amplif...

Page 18: ...handle the necessary paperwork and repair Remember to transport the unit in the original factory pack A list of authorized service centers in your area can be obtained from our Technical Support Group...

Page 19: ...___________________________________________________________________ ______________________________________________________________________________ _____________________________________________________...

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