Crest Audio Stereo Amplifier - Manual (Page 4)

Page 2 Crest Audio Pro Series Power Amplifiers
Introduction
Congratulations...on your purchase of a Crest Audio Professional Series power amplifier. Designed for years of reliable, flawless oper-
ation under rigorous use. These power amplifiers offer the sonic superiority and unsurpassed reliability for which Crest Audio is
famous, while remaining surprisingly compact. Advanced technology and extensive protection circuitry allow operation with greater
efficiency into difficult loads and power conditions. All Professional Series amplifiers are fully compatible with Crest Audio’s Octal
Socket Accessories and the NexSys computer-controlled audio system. The IGM (Instantaneous Gain Modulation) circuit ensures trou-
ble-free operation into loads as low as 2
Ω
. The clip limiting circuits protect drivers and ensure that sonic integrity is maintained, even
in extreme overload conditions. Crest Audio’s high-efficiency design uses tunnel-cooled heatsinks and variable speed DC fans. This
cooling topology maintains a lower overall operating temperature, resulting in longer output transistor life.
Model 9001, 10001, and 10004 power amplifiers use Crest Audio’s innovative “Power Density” circuitry.
Although the Crest Audio Professional Series amplifiers are quite simple to operate, and are housed in ultra-strong steel chassis,
improper use can be dangerous. Some of these models are very high-powered amplifiers that can put out high voltages and sizable cur-
rents at frequencies up to 30 kHz. Always use safe operating techniques with these amplifiers. FOR YOUR SAFETY, READ THE
IMPORTANT PRECAUTIONS SECTION , AS WELL AS INPUT, OUTPUT, AND POWER CONNECTION SECTIONS.
Unpacking
Upon unpacking, inspect the amplifier. If you find any damage, notify your supplier immediately. Only the consignee may institute a
claim with the carrier for damage incurred during shipping. Be sure to save the carton and all packing materials. Should you ever need
to ship the unit back to Crest Audio, one of its offices, service centers, or the supplier, use only the original factory packing. If the ship-
ping carton is unavailable, contact Crest to obtain a replacement.
Mounting
Professional Series power amplifiers will mount in standard 19-inch racks having sufficient depth. The 10004 & 10001 amplifiers are
four rack units high; the 9001 and 8001 models are three rack-spaces high, while the remainder are two rack-space units. All two and
three-rack space units (except for the 9001) are provided with four front panel mounting holes. The 9001, 10001, and 10004 have eight
front panel mounting holes. Crest Audio recommends using all mounting holes to secure the power amplifier in the rack; this will
ensure the safety of the equipment. Rear mounting ears are also provided on all amplifiers for additional support, which is essential in
non-permanent installations like mobile or touring sound systems, but recommended for permanent installations as well. Because of
the cables and connectors on the rear panel, a right-angle or offset screwdriver or hex key will make it easier to fasten the rear mount-
ing ears to the rails.
Note: The 10001 and 10004 models, because of their size, require rack mounting screws stronger than standard rack screws. For cus-
tomers in the USA, these are supplied with the unit. Customers in Europe and Asia should mount these models using heavy-duty met-
ric bolts.