P o w e r S p e c i f i c a t i o n s
8
Ω
S t e r e o
4
Ω
S t e r e o
2
Ω
S t e r e o
8
Ω
B r i d g e d
4
Ω
B r i d g e d
1kHz, 0.02% THD+N
1 2 0 0 W
2 2 0 0 W
3 3 0 0 W
4 4 0 0 W
6 6 0 0 W
20Hz-20kHz, 0.1% THD+N
1 1 0 0 W
2 0 5 0 W
3 0 0 0 W
4 1 0 0 W
6 0 0 0 W
Figures are Watts per channel, both channels driven.
Product Description
The Crest Audio 9001 is a high-power amplifier designed to
meet the most stringent needs of professional use in concert tour-
ing, high quality sound reinforcement, and professional fixed
installations.
The 9001 incorporates Crest Audio’s Power Density
™
engineer-
ing design philosophy, providing users with more substantial
power and increased headroom for a given size than comparable
amplifiers.
A three rack-space amplifier, the 9001 uses forced-air to cool
channel heat sinks mounted in a back-to-back tunnel configura-
tion. Stereo, parallel, and bridged mono operating modes can be
chosen with a rear-panel Mode Select switch. Actively balanced
female XLR input connections and single-screw solderless output
connectors are provided for each channel. The 9001 is fully com-
patible with the other Crest Audio Professional Series amplifiers,
Octal Socket Accessories and the NexSys
®
computer-controlled
audio system.
Design and Construction
The 9001 is built exclusively in Crest Audio’s own USA manu-
facturing facility, with internal components selected for premium
quality and proven durability. Each modular subassembly is pre-
tested, and the assembled 9001 receives a rigorous “hot room”
burn-in before thorough final checkout on precision test equip-
ment.
The no-compromise approach in the 9001’s electrical design and
mechanical construction provides the ultimate in reliability and
performance. Only high-grade components are used for the mod-
ular sub-assemblies in this ultra-strong, 12 gauge steel single-
piece chassis.
9001 Features
• Crest Audio’s legendary “overbuilt” power supply
• Toroidal power transformer
• Latest generation of high-speed, wide-bandwidth output
devices
• Tunnel cooling with back-to-front air flow
• Variable speed DC fan
• High thermal mass heat sinks
• Balanced XLR inputs
• Single screw solderless output connectors
• Stereo/Parallel/Bridged Mono mode selector switch
• Rear panel ground lift jumper
• 9001 protection circuitry:
-
Clip Limiting prevents speaker damage with gentle gain
reduction at clip threshold.
-
IGM (Instantaneous Gain Modulation) monitors connected
loads to detect conditions that may overstress output
devices, allowing safe operation into nominal 2
Ω
imped-
ances.
-
AutoRamp gradually increases gain to attenuator setting
level when amplifier is turned on.
-
Other protection circuitry: comprehensive thermal manage-
ment, and short circuit, DC voltage, turn-on/off transient,
current inrush and sub/ultrasonic input protection.
• Recessed, stepped attenuators
• Front panel circuit breaker/power switch
• Modular construction
• Full five-year warranty
(USA, Canada, U.K. & many other countries).
9001
POWER AMPLIFIER
®
Crest Professional
Series Amplifiers
are fully compatible
with the NexSys
Computer-Controlled
Audio system.
