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both in sound quality and power handling. The M-500 is rated conservatively with ratings
of distortion that are lower than the loudspeakers themselves. Many other amplifiers may
have power ratings that are similar but in fact may well have higher distortion ratings. If
the M-500 were to be rated this way, it will yield far greater power levels than specified.
If the M-500 is to be used on speakers other than PJB, take great caution since these
speakers may not live up to the true power levels the M-500 can provide. So if you hear
your speakers distorting at high sound levels, you should immediately back off on the
volume. Playing at a lower level will save your speakers from blowing; playing louder
will most certainly cause them damage.
A Note On Amplifier Power Ratings
For each watt a transistor amplifier delivers to a speaker it will approximately develop
one watt in heat dissipation. So at high power levels an amp can generate a lot of heat.
Not all amplifiers rated at the same power have the same actual power. If a manufacturer
rates an amp with a maximum power of 500 watts, what exactly does that mean? It could
run for 3 minutes before it goes up in smoke, or it could run all day long effortlessly. It
depends on the quality, size and design of the amplifier and its components. The size of
the amplifiers internal power supply, the type & quantity of transistors that are used in the
output stage, along with solid construction will have a major effect on manufacturing cost.
A cheap amplifier may be designed to last a few years before it dies. It may cost more
than its worth to give it an overhaul. In essence you get what you pay for. Your M-500 is
built to last for a very long time running day after day at continuous high power levels.
From AC input to speaker output the M-500 has more than adequate components to
deliver pure power to your speakers with sonic purity.
Taking care of your M-500
The M-500 will give years and probably decades of reliable service if it is cared for.
Use
a
cover or road case when transporting or storing the amplifier.
The M-500 was built to be as rugged as possible. However you should handle it with care.
Keep it away from moisture, heat and dust. Clean with a soft damp cloth such as a moist
towel. Do not use chemicals or solvents to clean it.
From time to time the unit may need to be cleaned internally since airflow is constantly
running through the amplifier. Dust can build up inside over long periods of time. Your
service agent should check the amplifier every 2-5 years for dust build up and cleaned
carefully with compressed air. (We recommend this procedure performed by qualified
professional service personnel only.)
Many perishable PJB parts are available as replacements, such as handles, feet casters,
grills, etc. These are available from your authorized PJB dealer or direct from PJB.