OWNER'S MANUAL
XL-600 POWER AMPLIFIER
A Division of Rockford Corporation
613 South Rockford Drive
Tempe, Arizona 85281
602 - 967 - 3565
SPECIFICATIONS
POWER RATING: Less than 0.08% THD at any power level up to 305 watts per channel into 8 ohms at any frequency from 20 - 20 kHz with both channels driven.
CONTINUOUS POWER OUTPUT: 450 watts per channel into 4 ohms at less than 0.1% THD, 20 - 20 kHz. 900 watts in mono into 8 ohms at less than 0.1% THD, 20 - 20 kHz.
CONTINUOUS POWER AT CLIPPING: *
Into 8 ohms, per channel: 360 watts
Into 4 ohms, per channel: 500 watts
Into 2 ohms, per channel: 750 watts
Into 1 ohms, per channel: 900 watts
Into 8 ohms, per channel: 1000 watts
Into 4 ohms, per channel: 1500 watts
IM DISTORTION (SMPTE): Less than 0.04% from 1 watt to 305 watts into 8 ohms.
FREQUENCY RESPONSE @ 1 WATT INTO 8 OHMS:
+/- 0.1 dB, 10 Hz to 50 kHz +/- 3 dB, 0.1 Hz to 500 kHz
POWER BANDWIDTH: Greater than 100 kHz
PHASE SHIFT FROM 20 - 20 kHz: Less than 1/4 of one degree
SLEW RATE: 10 kHz, 130 volts peak-to-peak square wave: 100 V/us
SIGNAL TO NOISE RATIO, UNWEIGHTED: More than 100 dB @ 305 watts into 8 ohms
INPUT: 47,000 ohms; 1.8 volts for 305 watts into 8 ohms
DAMPING FACTOR INTO 8 OHMS: > 200 to 1 kHz; 150 @ 10 kHz
PHYSICAL: 7” high, 19” wide, and 13” deep, plus 1/2” for feet, plus 2” for handles. Net weight 51 Ibs.; Shipping weight 55 Ibs.
*Continuous duty cycle across the audio band. Depending on impedance, time may be thermally limited to several minutes.
Congratulations on your purchase of this EXCELINEAR POWER AMPLIFIER. We are confident that this amplifier is capable of driving any known loudspeaker load, with sufficient power reserves to suit any home listening situa-
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INSTALLATION
The gloss black insert on the faceplate of your new Hafler Equipment has been packaged with a removable protective coating. Please peel off this coating following installation.
When cleaning the faceplate, we advise a soft cotton cloth with a non-abrasive cleaner that is safe for Lexan and painted surfaces. DO NOT use paper towels or any coarse materials to clean the faceplate as these materials may scratch the insert.
Ventilation
Adequate air flow is important to the continuing reliability of any power amplifier. The XL-600 uses a quiet, continuously variable speed fan to cool the entire chassis Cool air must circulate freely into the side vents and out the rear vent. Allow at least one inch on each side, and at least three inches to the rear for unimpeded flow.
AC Line Connections and Switching
NOTE: BE SURE YOUR AMPLIFIER IS WIRED FOR YOUR LOCAL LINE (MAINS) VOLTAGE BEFORE CONNECTING AC POWER!
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The XL-600 is normally wired for use on 120 Volt 60 Hz power lines. If your line (mains) voltage is different, you will require the optional export multi-voltage transformer, which accommodates voltages from 100 to 240 VAC, at 50-60 Hz.
The XL-6003 power switch may be left ON, and the amplifier switched remotely via a preamplifier or other control center, provided that device has a switched AC outlet capable of supplying 20 amperes for the amplifier, in addition to the requirements of other units being switched. Alternately, you may connectthe amplifier directly to a wall outlet, and use the front panel power switch provided on the amplifier.
As a general rule, power amplifiers should be turned ON LAST, and turned OFF FIRST, before other equipment, to avoid switching transients that may be generated by prior stages Hafler OH-100, OH-110, IRIS and SE-100 preamplifiers employ protective muting circuitry which obviate this concern.
Input Connections
Conventional shielded RCA type cables should be used to connect the amplifier’s gold input jacks to the preamplifier’s output, Gold connectors provide added assurance against signal degradation due to contact corrosion. Regardless of cable or connector material, verify that the contacts are clean, and that the plug’s outer shield is tight on the jack, to avoid hum.
If you wish to install the XL-600 at some distance from the preamp, the preamp’s output impedance and cable capacitance determine the maximum cable length to avoid high frequency losses. If, as with Hafler preamps, the output impedance is 600 ohms or less, and the cable capacitance is 50 picofarads (pF) or less per foot, then up to 50 feet of cable may be used. On long runs, keep the left and right cables close together, and avoid running them parallel to AC power wiring to minimize hum pick up.
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