driver moving too much


I have recently bought a turntable for my audio system. It is a music hall 2.1 and I have noticed that when playing some recordings the driver in my speakers moves a lot especially at high volume levels. Even when there is silence in the recording the driver moves without producing sound. I was wondering if anyone can tell me what causes this and if it is bad for my system in any way. ANy inputs will be appreciated.

tiggerpooh

Showing 1 response by eldartford

Find out if the problem is feedback or record warp/turntable defect by putting the pickup down on a record while the table is stopped. Tap the record and see what happens.
It certainly is a good idea to have the table on a solid base so that vibration does not get applied to it, although some tables have excellent vibration damping and are surprisingly immune to this. I have found that the worst accoustic feedback comes from the record itself acting as a diaphram excited by airborne sound. A record clamp helps this as does a good cover on the table.
The arm/pickup combo greatly affects the situation. Since I began using a Sony PSX800 table with linear "Biotracer" arm I have had absolutely no problem with accoustic feedback. The biotracer arm is servo-controlled, and has a completely massless "limp noodle" feel to it.