Hafler XL-600 Owner's Manual - 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 making any change in
connections, and before removing the cover.
2. Connect a speaker to the right channel speaker ter-
minals to first obtain a normal listening level by adjusting
the preamp’s volume control. A convenient signal is the
interstation noise from an FM tuner with its muting deac-
tivated. This is similar to white, or uniform broad band
noise.
3. Now reconnect this “Monitor” speaker (here you may
instead use headphones or a meter) between the left and
right red binding posts.
SCHEMATIC DIAGRAM FOR AMPLIFIER STRAIGHT WIRE DIFFERENTIAL TEST
MONITOR
H E A D P H O N E S
S P E A K E R
LOAD
SPEAKER
* wirewound potentiometer not suitable
(all resistor values in Ohms)
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