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The cones in the subwoofer if my P38 Vogue have shredded. I'd post a picture but I can never get it to work.

It is an XQA100070.

They measure 3 ohms, so must be 4 with impedance...

But I'm clueless on power for speaker systems.

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I think they are rated at about 50W. All you really need are some that will fit the hole.

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Is it possible to rebuild the cones?

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Yes, if you have access there are music shop specialists that can re-cone and put new membranes to your old speakers.
Have done this to a friend old Audi and another with a G-Klasse, both with unique speakers.
Although I have put new speakers on mine directly, just a matter of matching size and impedance.

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hi Chasman,

How did the refurb go? Any speakers that you would recommend (& links)?

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romanrob wrote:

hi Chasman,

How did the refurb go? Any speakers that you would recommend (& links)?

Pretty simple, actually. I moved the amplifier into the bottom of the enclosure using some plastic standoff washers to stop it bending over the diagonal rib.

Hawkeng 6mm (M6) Nylon Spacers Standoff Washers (12 Pack) 4 x 15mm, 4 x 10mm, 4 x 5mm - Black https://amzn.eu/d/2ZHxfzj

Use Nyloc nuts so they don't vibrate undone.

I just went into my local Halfords and asked for 6.5 inch mid/bass speakers. They sound great, adding depth without overwhelming everything else. I didn't even keep the box, sorry!

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I refurbished the subwoofer a couple of years ago - the cones had disintegrated, a common problem I put down to the speakers not being man enough to cope with the movement required of a subwoofer. I thought I'd try some more 'meatier' 6.5" speakers and went for Lanzar MaxP64 Max Pro - pretty cheap and looked robust. Probably not best matched to the amp but are performing pretty well and can take the bass being wound up a lot more than the OEMs.

The Lanzar speakers do not quite fit into the subwoofer box cut outs at the top as the substantial top rings are a bit too wide (a mm or so). Two options - remove the substantial rings or ease out the cut outs. I went for the latter as the former would leave the cones not that well fixed/supported so would probably disintegrate as per the OEMs. The trusty dremel made opening up the cut outs quite easy. The Lanzars also need longer screws as the OEM fasterners were a bit too short with the thicker top rings.

I also moved the amp to the bottom of the subwoofer box but did not employ such an elegant solution as Chasman. The amp was bolted directly to the bottom of the OEM speakers so I figured vibration couldn't be that much of a problem. I fashioned an off cut of wood to fit around the rib and screwed this to the bottom of the box and then screwed the amp directly to its new wooden support. The wires twixt amp and speaker had to be extended to reach between the two.

All pretty simple/easy modifications. Piccy:

enter image description here

I also bought a couple of new cones for the OEM speakers and refurbished them - they are now sat in my growing stash of 'ready use' spares!

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thanks both

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seems i had it easy... my sub is XQA100020... no need to relocate any amp (is mounted outside) and the 6.5 inch bass speakers i bought off ebay slotted straight in : o)