- DL manuals
- Hafler
- Amplifier
- XL-600
- Owner's Manual
Hafler XL-600 Owner's Manual
Summary of XL-600
Page 1
A division of rockford corporation 613 south rockford drive tempe, arizona 85281 602 - 967 - 3565 owner's manual.
Page 2: Specifications
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 les...
Page 3: Installation
*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 re...
Page 4: Input Connections
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 swit...
Page 5: Output Connections
Output connections to preserve the high damping factor of the xl-600, and to minimize power loss, the use of at least 16 gauge speaker wire is recommended, especially for speakers of less than 8 ohms impedance, or for wire runs of 15 feet or more. Your dealer can advise you on the wide variety of pr...
Page 6: Grounding
Grounding the xl-600 employs a common ground between the two channels, which, for the input, is connected directly to chassis, and for the output, is connected to chassis through a 5 ohm thermistor to avoid ground loops. This common ground allows the use of external devices which also have common gr...
Page 7: Initial System Check Out
Initial system check out after initial set-up, leave the xl-600 switched off (rocker switch to the left) and turn on the rest of the system. Wait 30 seconds, and switch on the amplifier. If you hear a loud sharp “thump” from the speakers, or no sound is heard after the relay engages and signal is ap...
Page 8
Amplifier distortion, it will already be exceedingly low on the xl-600 as you receive it because each amplifier chan- nel has been factory adjusted using a typical loudspeaker load. But when the xl-600 is connected to your own speakers, careful readjustment by a technician may yield some slight impr...
Page 9: Performing The Adjustments
A pair of headphones which have a high degree of isolation from outside sounds may simplify your test listening, but are not essential. If a very sensitive meter is available, it can replace the listening requirement, but your ears are better than conventional meters. Using a loudspeaker, what you h...
Page 10
Much more sensitive than speakers, however, the relative loudness of the residual distortion may be misleading. The test procedure is as follows: 1. First use the right channel of the xl-600 as the driving amplifier and the left channel as the test amplifier. Turn off the amplifier each time before ...
Page 11: In Case of Difficulty
4. Connect the attenuator circuit to the right channel output, and connect the left channel input to the attenuator. Be sure the attenuator is also connected to the right channel ground. 5. Connect the “load” speaker to the left output 8. Center the “fine” potentiometer, and adjust the “coarse” pote...
Page 12: Factory Service &
If the pilot lamp does not glow when the amplifier is turned on, and it is not due to an excessive temperature condition, then either the internal 15 ampere line fuse is blown, or the circuit breaker or fuse supplying the ac power has inter- rupted power. If no sound is heard once the relay engages ...