Stereo Power Amplifier
Power output: 50 watts per channel into 8Ω (stereo), 110W into 8Ω (mono)
Frequency response: 20Hz to 20kHz
Total harmonic distortion: 0.2%
Damping factor: 400
Gain: 29 dB
Input sensitivity: 0.714V
Signal to noise ratio: 100dB
Dimensions: 483 x 213 x 44.5mm
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Reviewed Nov 22nd, 2013 by John Buckham
The Hafler P-1000 power amplifier is a high quality professional power amplifier that can find utility in professional applications as well as domestic uses. Unfortunately no longer in production can provide dependable service where a low power (50 w/pc) amplifier is needed.
In a nutshell -
Sonic accuracy: 8
Ease of service: 9
User Friendliness: 8
The Hafler P-1000 is designed to be mounted in a 19 inch equipment rack, these amps are convection cooled and contain no cooling fan. The power devices (MOSFETS) are mounted to heatsinks located on the sides of the amplifier. The front of the heatsinks are extended out to provide mounting in a standard 19 equipment rack. These amplifiers produce quite a bit of heat due to the biasing scheme of the output devices. A minimum of one rack unit should be located above and below the amp to allow for proper air circulation. Inputs are professional balanced XLR/1/4 TRS or unbalanced RCA with a flip of a back panel mounted switch. The front panel consists of a an illuminated rocker style power switch, a signal present LED, clip LED, overtemp shutdown LED and gain controls for each channel. The knobs can be removed and replaced with provided plugs to thwart tampering/gain changes in commercial installations. Unlike it's larger brethren the P-1000 gain controls allow for full attenuation of the input signal.
In use these amps sound quite good providing a fairly deep/wide sound-stage with a fair amount of detail that will please most audiophiles. Although the power supply is fairly high current the filter capacitors are of limited value at only 3300 uF each for both rails, thus bass transients suffer at high volume levels where the amp is being asked to produce close to maximum output.
If you are planning to get a Hafler P-1000, and this is a great choice, like any amp you should use your own ear and gear to decide if this amp is for you before purchase. Keep in mind some reconditioning my be required to bring this amp back to it's former glory, specifically the filter capacitors should be replaced if the amp is more than 7 years old, or perhaps newer. Many of them will have been used commercially mounted in a rack and on for most of the time, these amps get hot and heat kills capacitors.
The P-1000 really shares none of the audio woo of the legendary DH-200/220 amps which were designed by David Hafler, rather designed by Rockford Corporation integrating new contemporary topology into these products-while still paying homage to the Hafler ideals of decades past. All in all Rockford did a most excellent job keeping the sonic spirit of the Hafler Legacy alive.