Crest audio PFA600 SPECIFICATIONS

DC-POWERED AMPLIFIER

Information Sheet

Crest’s PFA600 is a compact, extremely powerful DC-powered amplifier designed for portable and mobile applications where AC is either unavailable or impractical. The PFA600 matches the same uncompromisingly high-quality circuitry used in the Crest Professional Series amplifiers with two high-efficiency DC-to- DC switching power supplies, incorporating Class H modulated supply rails for further efficiency.

Three rack spaces high, the PFA600 runs on 24 volts DC. A forced-air configuration is used to cool channel heat sinks mounted in a back-to-back tunnel arrangement. Input/Output barrier strips, Octal Sockets and circuit breaker/power switches are provided for each channel.

The rugged steel chassis is designed for long-term structural soundness. Either channel can be independently switched off if not required, conserving battery power.

The PFA600, like Crest’s Professional and CC/CV Series amplifier, features comprehensive protection circuitry, including IGM, which allows the amplifier to operate safely even into very stressful loads, and Auto-Ramp, which gradually increases gain when the amplifier is initially powered up or comes out of a protect mode.

Power Specifications		20Hz - 20kHz *		EIA
		<0.1% THD		@ 1 kHz, <0.05% THD
4	Ohm Stereo	600	Watts	650	Watts
2	Ohms (Channel A Only)	600	Watts	650	Watts
8	Ohms Bridged	1200	Watts	1290	Watts

* Continuous sine wave power is limited by current rating of front panel circuit breaker and IGM circuit.

									AMPLIFIER SPECIFICATIONS
									PFA SERIES - PFA600
Max RMS Voltage Swing									67V, each channel
Max Peak Voltage Swing									97.5V, each channel
		Frequency Response							20 Hz - 20 kHz; +.1, -.5dB, 600W into 4 Ohms
						THD			<0.015% @ 600W into 4 Ohms, 1kHZ
				SMPTE IMD					<0.04% @ 450W into 4 Ohms, 60Hz& 7kHz
					Slew Rate				35V / s, input filter bypassed
				Damping Factor					400:1, @ 1kHz, 8 Ohms
				Input CMRR					>97.9 dB
				Voltage Gain					40x standard, others upon request
				Input Sensitivity					500mV RMS for full power at 4 ohms
				Input Impedance					>20k Ohms, actively balanced
Hum and Noise (“A” Weighted)									>101dB
Connectors (per channel)									Input barrier strip, Octal Socket, barrier strip with 3 parallel outputs
				Power Supply					Two 1 kVA power transformers, DC-to-DC switching supplies
		Max Current Draw							5A @ 24 VDC (45A @ 24VDC - 600 Watts into 4 Ohms)
						Cooling			Rear to front tunnel heatsink, 100 CFM DC fan
						Controls			2 front panel attenuators, 2 circuit breaker/power switches, signal ground lift jumper, remote on/off
LED Indicators (per channel)									Clip/Limit, Signal, Protect, Active, On, Undervoltage, Overvoltage
					Protection				High temp., DC voltage, turn-on/turn-off transient, subsonic, ultrasonic, short circuit, IGM™, AutoRamp™
				Construction					Modular, 14 ga. steel chassis
	Dimensions (H x W x L)								5.25"x19"x15" (16" to rear ears); 13.34cm x 48.26cm x 38.10cm (40.64cm to rear ears)
				Gross Weight					55.0 lbs (24.52 kg.)
				Net Weight					41.0 lbs (23.10 kg.)
					Warranty				5 years, parts and labor

Architect’s

The power amplifier shall have two channels. Each will deliver a mini-

have a magnetic circuit breaker/power switch. Maximum current draw shall be no greater

Specifications

mum of 600 watts into 4 ohms, both channels driven, 20Hz-20kHz.

than 45 amperes per channel at rated power into a 4 ohm resistance. Indicators shall include

PFA600

Channel A shall have the further capability of delivering 600 watts into

Clip/Limit, Signal, Protect, and Active LED’s for each channel, as well as an Undervoltage

2 ohms. In bridged mode, the amplifier shall deliver a minimum of 1200

LED, an On LED, and an Overvoltage LED. The amplifier shall have an attenuator control

watts into 8 ohms, both channels driven, 20Hz-20kHz. The amplifier shall be fan-cooled. It

for each channel, a signal ground lift jumper, remote on/off connections, and DC power

shall have circuitry to protect itself and the speaker load from output short circuits, DC volt-

input terminals. The inputs shall be actively balanced and have female XLR-type 3-pin con-

age on outputs, and thermal overload. It shall have impedance sensing circuitry, an RMS clip

nectors (pin 3+) and barrier strip connectors. Output connectors shall be barrier strips, with

limiter and Auto-Ramp™ signal control. Output relays shall protect the speaker load from

three parallel outputs per channel. The amplifier shall have Octal Sockets for optional acces-

any type of amplifier failure. The amplifier shall have a voltage gain of 40x with an input

sory modules. All connections (input, output, power, control, and accessory), sockets, con-

sensitivity of 500mV for rated power at 4 ohms. The hum and noise level shall be at least

trols, switches, jumpers, and indicators shall be located on the front panel. The packaging of

101 dB below rated output, “A” weighted. SMPTE IMD shall be less than 0.04% at rated

the amplifier shall allow for standard rack mounting without requiring space between similar

power. The frequency response shall be greater than 20Hz-20kHz, +.1, -.5dB at rated power.

units. Dimensions shall be 5.25" (13.34cm) high, 19" (48.26cm) wide, and 15" (38.10cm)

The amplifier will operate on 24 volts DC. Each channel shall be powered independently by

deep. The amplifier shall have a net weight 41 lbs. (23.10kg). The amplifier shall be desig-

a 1 kVA DC-to-DC switching power supply, with Class H operation for high efficiency, and

nated the Crest Audio Model PFA600.

Crest Audio reserves the right to make improvements in manufacturing or design which may affect specification.

Crest Audio specification literature is available in downloadable PDF format; visit our website at: http://www.crestaudio.com. ©1997 Crest Audio Inc.

Crest Audio Inc.

100 Eisenhower Dr., Paramus NJ 07652 USA

TEL: [phone] FAX: [phone]

http://www.crestaudio.com

v. 1.1 7/9/97

B8000001

Printed in USA