Model 1707 Integrated Amplifier User Manual
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Using Headphones with Model 1707
When active (i.e. not in standby mode), depress the volume control dial. This
will mute the loudspeakers, but sound will continue to available via the
headphone socket. The headphone output of the Model 1707 is suited to
headphones with an impedance of between 20 and 100
Ωs.
To re-engage the loudspeakers, depress the volume dial and then release it.
About the Advanced Protection Features on the Model 1707
A sophisticated 32-bit microprocessor-based system continuously monitors the model
1707 for DC offset errors and/or loudspeaker short circuits. If an error is detected, the
loudspeakers are instantly disconnected from the amplifier.
During power up an power down cycles, to ensure there are no extraneous sounds, the
system mutes the loudspeakers and the headphone output.
In the event of a fault condition arising and the speakers being disconnected, the
GREEN LED’s that surround the volume level control will flash once per second, and the
RED MUTE LED will illuminate.
If this happens, check that you do not have a wiring short between the Model 1707 and
your loudspeakers. You could check this for example by powering down and then
disconnecting your speakers and powering the unit up again. If the unit behaves
normally, you have a speaker or speaker cable fault. Clear the fault, reconnect the
speakers and then power up the unit again.
In the unlikely event after disconnecting the loudspeakers the MUTE LED remains
illuminated and/or the GREEN LED’s around the volume control continue to flash, you
have an internal fault. Kindly contact Ovation High Fidelity via the Contact page on our
website for service.
