Hafler XL-600 Owner's Manual - 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 applied, consult the
section "In Case of Difficulty” at the end of this manual.
Mono /
Stereo Switch
This switch should be left in the STEREO position, unless
bridged operation is desired, as outlined in the section
“Monophonic Operation”.
Speaker Fuses
The fuse holders on the back panel provide a measure of
protection against excessive power output to the speakers.
They are not intended to protect the amplifier. The XL-600
is supplied with 5 ampere fast blow fuses installed. This
value will afford minimal protection for most speakers. A
spare pair of 10 ampere fast blow fuses has been included,
for testing purposes, or high power applications. This fuse
value will offer no speaker protection. IF THE MANUFAC-
TURER OF YOUR LOUDSPEAKER RECOMMENDS A
SPECIFIC FUSE VALUE, OBTAIN TYPE
3AG
OR
AGC
FUSES AND INSTALL THEM IN THE BACK PANEL
FUSE HOLDERS.
THE EXCELINEAR CONCEIT
The purpose of the Excelinear technology is to detect and
then minimize all possible non-linearities, or distortions.
This is done by subtracting the output of the amplifier from
its input, A perfect amplifier would have no residual signal.
The less difference signal that remains, the better the
amplifier. The test described below enables you to hear
only the difference signal- the sum total of all audible
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