Hafler DH-500 User Manual

Power Rating: Less than 0.025% total harmonic distortion at any power level up to 255

watts continuous average power per channel into 8 ohms at any frequency between
20 Hz and 20 kHz with both channels driven.

IM Distortion (SMPTE): Less than 0.007% from 1 watt to 255 watts into 8 ohms

Typical THD at 255 watts into 8 ohms:

kHz-0.002%; 10 kHz-0.007%

Frequency Response into 8 ohms: -3 dB, 0.5 Hz to 120 kHz at 1 watt

dB, 5 Hz to 40 kHz at 255 watts

Typical Channel Separation at 1 kHz: 60 dB

Signal to Noise Ratio: Exceeds 100 dB referred to 255 watts into 8 ohms, unweighted

Exceeds 90 dB referred to 1 watt into 8 ohms, A weighting

Input Impedance: 47,000 ohms

Input Sensitivity: 2.35 volts for 255 watts into 8 ohms; 0.145 volts for 1 watt

Damping Factor: 200 to

kHz into 8 ohms; 60 to 10 kHz into 8 ohms

Rise Time:

10 kHz, 80

volts p/p square wave, 10% to

90%: 2.5 us.

Slew Rate:

1 kHz, 120

volts p/p square wave: 45

V/us.

Semiconductor Complement: 27 transistors, 12 power Mosfets, 33 diodes, 8 zener diodes,

one integrated circuit, one diode bridge.

Power Consumption: 240 VA quiescent; 1200 VA @ rated power into 8 ohms, 2 channels

Size: 7-l/4” high, 19” wide, 13” deep including handles

Net Weight: 45 lbs.

Shipping Weight: 49 lbs.

CAUTION:

For continued protection, replace the power fuse only with the same type and rating

as indicated.

WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS EQUIPMENT

TO RAIN OR MOISTURE.