Cheap 15" Bass Speaker [Archive] - Telecaster Guitar Forum

ojaverde

November 5th, 2009, 01:51 PM

Have you thought about repairing the speaker? I had a similar problem with the original oxford in my 64 deluxe. I followed directions posted at the weber speaker website and it worked like a charm. See below. I just glued the original dust cap back on my speaker.

I recently purchased a '62 Brown Princeton which has a noticeable speaker buzz. I determined the problem is probably a warped voice coil or something in the gap, because I can push in on the cone and hear a rubbing noise as the cone moves. The speaker is an Oxford, dated '62. Should I buy a replacement speaker, have the original reconed, or ?

David, congratulations on the purchase. Nice amp. The noise is definitely a rub, either from, as you suggested, a warped (from overheating) voice coil, or flakes of paper or other material stuck in the gap between the voice coil and pole or front plate hole. There is a way to correct that if it isn't too severe. I'll detail it here, then you can make the decision whether to try it or not. The result is that you correct the problem without reconing the speaker, thus preserving the value of the original speaker. First, since you will be performing this operation without demagnetizing the magnet, make sure your work area is very clean and you have plenty of light. Lay the speaker on its back with the cone facing up and with a scalpel, carefully cut out the dustcap, leaving about 1/16" of dustcap where it is glued to the cone. This is important because the voice coil wires pass through this point and you want to make sure you don't cut them. Next, use a vacuum cleaner or clean, dry pressurized air to suck or blow the dust and other debris out of the gap. If you hold the speaker upside down with the cone facing downward it will probably help getting the dust and debris out. Next, take a 3x5 index card and cut it into a strip that is the correct length so that you can form it into a circle and stick it down into the gap between the inside of the voice coil and the outside of the pole. This will help form the voice coil back into a circle. Next, lay the speaker back down on its back. Take a Q-tip or small paint brush and dip it into a bottle of acetone (finger nail polish remover). Spread a small amount of this acetone on a couple of the rings of the spider, which is the brownish/yellow corrugated disk attached to the backside of the cone at the base of the basket. Next, place a jar lid or other disk on the cone where the dustcap was and let the speaker set overnight. The lid or disk will prevent dust from getting into the gap overnight, and the acetone causes the spider to relax and reposition slightly, thus repositioning the voice coil. The next day, remove the lid and the index card strip and see if you still have a rub. If you do, try the acetone again, same procedure. If, after a couple of tries, it seems hopeless, then professional reconing is the only resolve. I think it's worth trying though, to preserve the value of the original speaker. If it works, contact me with the size of the dustcap and I'll send you one to replace the one you cut out and instructions on how to replace it. As far as using the speaker, if you plan to use it regularly, at high volumes, I would suggest packing the original away and install a replacement speaker. Many speakers would work well in that amp, such as a Mojo MP10R, a Naylor 10, a Kendrick 10, or a WeberVST P10Q. If you want some british tone, you might check out Celestion's new Silver series or WeberVST's Blue Pup and Silver Ten.


	Telecaster Guitar Forum > Other Discussion Forums > Amp Central Station > Cheap 15" Bass Speaker PDA Cheap 15" Bass Speaker Maggot November 5th, 2009, 01:27 PM The speaker on my Peavey TNT 100 has developed a voice coil rub. I'm looking for a cheap replacement speaker, and I can't seem to find any. The amp set me back $150 and is never going to sound like an SVT, but is loud enough to play with a drummer. I'm looking for the kind of cheap and efficient speaker that would come in a cheap but effective 100w combo. There has to be a way to get something for about $50. Anyone know anything? Jakedog November 5th, 2009, 01:48 PM This is more than you want to spend, but I looked around and couldn't find anything that would fit your needs and your price range... http://www.carvinguitars.com/products/single.php?product=NE15-8&cid=52 Super lightweight, dirt cheap, plenty of power handling, and these things sound really, really, good. For $100 you won't find anything else even close. ojaverde November 5th, 2009, 01:51 PM Have you thought about repairing the speaker? I had a similar problem with the original oxford in my 64 deluxe. I followed directions posted at the weber speaker website and it worked like a charm. See below. I just glued the original dust cap back on my speaker. I recently purchased a '62 Brown Princeton which has a noticeable speaker buzz. I determined the problem is probably a warped voice coil or something in the gap, because I can push in on the cone and hear a rubbing noise as the cone moves. The speaker is an Oxford, dated '62. Should I buy a replacement speaker, have the original reconed, or ? David, congratulations on the purchase. Nice amp. The noise is definitely a rub, either from, as you suggested, a warped (from overheating) voice coil, or flakes of paper or other material stuck in the gap between the voice coil and pole or front plate hole. There is a way to correct that if it isn't too severe. I'll detail it here, then you can make the decision whether to try it or not. The result is that you correct the problem without reconing the speaker, thus preserving the value of the original speaker. First, since you will be performing this operation without demagnetizing the magnet, make sure your work area is very clean and you have plenty of light. Lay the speaker on its back with the cone facing up and with a scalpel, carefully cut out the dustcap, leaving about 1/16" of dustcap where it is glued to the cone. This is important because the voice coil wires pass through this point and you want to make sure you don't cut them. Next, use a vacuum cleaner or clean, dry pressurized air to suck or blow the dust and other debris out of the gap. If you hold the speaker upside down with the cone facing downward it will probably help getting the dust and debris out. Next, take a 3x5 index card and cut it into a strip that is the correct length so that you can form it into a circle and stick it down into the gap between the inside of the voice coil and the outside of the pole. This will help form the voice coil back into a circle. Next, lay the speaker back down on its back. Take a Q-tip or small paint brush and dip it into a bottle of acetone (finger nail polish remover). Spread a small amount of this acetone on a couple of the rings of the spider, which is the brownish/yellow corrugated disk attached to the backside of the cone at the base of the basket. Next, place a jar lid or other disk on the cone where the dustcap was and let the speaker set overnight. The lid or disk will prevent dust from getting into the gap overnight, and the acetone causes the spider to relax and reposition slightly, thus repositioning the voice coil. The next day, remove the lid and the index card strip and see if you still have a rub. If you do, try the acetone again, same procedure. If, after a couple of tries, it seems hopeless, then professional reconing is the only resolve. I think it's worth trying though, to preserve the value of the original speaker. If it works, contact me with the size of the dustcap and I'll send you one to replace the one you cut out and instructions on how to replace it. As far as using the speaker, if you plan to use it regularly, at high volumes, I would suggest packing the original away and install a replacement speaker. Many speakers would work well in that amp, such as a Mojo MP10R, a Naylor 10, a Kendrick 10, or a WeberVST P10Q. If you want some british tone, you might check out Celestion's new Silver series or WeberVST's Blue Pup and Silver Ten.