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Help getting info of sub
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<blockquote data-quote="hispls" data-source="post: 8772944" data-attributes="member: 614752"><p>That does appear to be the old flat piston PPI. Those are around 30 years old now and I would not have high expectations that it will function like new. If the cone won't move something is wrong, either someone burned up the coil in there or dropped it and the pole piece shifted and is pinching the coil.</p><p></p><p>Running amps at high impedance just gives you less power but will be much easier on the amp, shouldn't be that difficult to get 500W into 8 ohms.</p><p></p><p>It is very unlikely you could ever find parts to recone one of those so if it's blown it's just going to be good for a doorstop.</p></blockquote><p></p>
[QUOTE="hispls, post: 8772944, member: 614752"] That does appear to be the old flat piston PPI. Those are around 30 years old now and I would not have high expectations that it will function like new. If the cone won't move something is wrong, either someone burned up the coil in there or dropped it and the pole piece shifted and is pinching the coil. Running amps at high impedance just gives you less power but will be much easier on the amp, shouldn't be that difficult to get 500W into 8 ohms. It is very unlikely you could ever find parts to recone one of those so if it's blown it's just going to be good for a doorstop. [/QUOTE]
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