Hafler XL 280 Service Manual

Page 1

THE

h@fi @[F XL-280

EXCELINEAR
POWER AMPLFIER

INSTRUCTIONS
for OPERATION
and KIT ASSEMBLY

IF THE SPEAKER FUSES BLOW. NO SOUND
WILL BE HEARD, ALWAYS CHECK FOR
BLOWN FUSES FIRST.

NOTE:

LM 165 Please reler lo lhis
serial number in all communications
$3.00 regarding lhis equipment.

THE DAVID HAFLER COMPANY
5910 Crescent Boulevard, Pennsauken, New Jersey 08109 B

A Division 01 the Rockford Corporation, Tempe, AZ 85281

Page 2

SPECIFICATIONS

Power Rating:
Less than 0.05% total harmonic distortion at any power level up to 145 watts continuous average
power per channel into 8 ohms at any frequency between 20 Hz and 20 kHz with both channels driven.
Continuous Power Output:
Into 4 ohms, below 0.1% THD, 20-20 kHz, per channel: 200 watts
Into 8 ohms, below 0.1% THD, 20-20 kHz, mono mode: 400 watts
Continuous Power at Clipping:*

Into 8 ohms, per channel: 180 watts Into 4 ohms, per channel: 280 watts
Into 8 ohms, mono mode: 560 watts Into 2 ohms, per channel: 360 watts
Into 1 ohm, per channel: 325 watts

IM Distortion (SMPTE):
Less than 004% from 1 watt to 145 watts, each channel, into 8 ohms

Typical TI-ID at 145 watts into 8 ohms:

1 kHz-0.007% 10 kHz-0,02% 20kHz-0.04%
Frequency Response @ 1 watt into 8 ohms:

10.1 db, IO Hz to 500 kHz 1 3 db, 0.1 Hz to 500 kHz
Power Bandwidth:

Greater than 100 kHz
Phase Shift from 20 Hz to 20 kHz:

Less than 15 minutes (M: of one degree)
Typical Channel Separation:

20 Hz: 70 dB 1 kHz: 80 dB 20 kHz: 70 dB
Signal to Noise Ratio, unweighted:

More than 100 dB @ I45 watts into 8 ohms
Input Impedance:

47,000 ohms.
Input Sensitivity:

1.6 volts ms for 145 watts into 8 ohms
Damping Factor:

300 to 1 kHz into 8 ohms 250 to 10 kHz into 8 ohms 180 to 20 kHz into 8 ohms
Slew Rate:

10 kHz, 60 volts peak to peak square wave: 75 V/).IS
Rise Time:

10 kHz, 60 volts peak to peak square wave, 10% to 90%: 0.7}15
Semiconductor Complement:

30 transistors, 12 power MOSFETs, 9 diodes, 4 zener diodes, 2 diode bridges

Power Consumption:
Quiescent: 150 VA Maximum: 1200 VA
@ 145 watts/channel into 8 ohms: 540 VA @ 200 watts/channel into 4 ohms: 840 VA
Size:
5-1/8 high, 17 wide, 10-1/2 deep.
Net Weight:
27 lbs.
Shipping Weight:
31 lbs.

*Continuous duty cycle across the audio band. Depending on impedance, time may be thermally limited
to several minutes.