Wright Audio
Stereo Preamplifier Instructions
L- 5
Please take a few moments to read this manual. Doing so will enable you to thoroughly enjoy your
new audio system's quality and fully utilize its versatility. But first some cautions. Most are
common sense, but are here as reminders. These cautions apply to most tube and solid-state
amplifiers, and are not specific only to this product.
PLEASE NOTE: This preamplifier has been designed NOT to produce signal
transients during start-up or shut down. However, a faulty part or other conditions
may cause a transient to be passed to a power amplifier or crossover. To avoid
costly damage, get in the habit of turning the preamplifier on first and letting it warm
up for a couple minutes before you turn on your external crossover or power
amplifier.
When shutting down, it is best to turn off the solid-state devices first and the
preamplifier last.
1. Never touch the exposed pins on the Control Unit's back panel when the
power supply interconnecting cable is unplugged from the Control Unit.
2. Connect the unit to an electrical outlet providing 50 to 60 cycles AC and the
voltage marked on the power supply. The unit will operate satisfactorily when
operated within 5% of that shown on the unit. Any other voltage will void the
warranty.
3. These units have been supplied with a 3-prong grounding plug. This
arrangement is utilized as an added measure of safety. Do not defeat its
purpose in any way.
4. The power cord should be unplugged from the AC outlet when the unit will not
be used for an extended period of time.
5. The unit must not be exposed to excessive moisture. Never use any more
than a cloth
lightly
moistened with water to clean it.
6. The tubes become
warm to hot
in normal operation.
7. Never switch or disconnect input or output cables while the system is turned
on. Doing so may damage your speakers.
8. Opening the unit voids the warranty.
9. Tubes
must
be replaced at the end of their useful
listening
life, which is about
4000 hours, or approximately 4 years of 'average' use. Operation past this
point will not provide quality sound. Wright Audio always supplies the proper
replacement tube types at reasonable prices.
10. Do not open the covers of the control unit or the power supply. Lethal voltages
exist within,
even when the power cord is disconnected from the outlet.
Only a qualified service technician familiar with vacuum tube technology must
service your preamplifier. Preferably, it should be returned to Wright Audio if
there is a malfunction.
