BV2600 still sounding bad after recap

28 replies
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Laurent1602 (archived2)
Bronze
Posted May 30, 2015 at 16:30 GMT
#2250246

Hi,

I just installed new capacitors in one of my BV2600's because it sounded terrible (planning to do the other as well once this one works fine). I used 8.2uF 70V and a 22uF 50V since it was the only thing available in my local shop but this should work fine. I did not replace the resistor and coil.

When testing the speaker out now, the higher tones sound perfectly but the lower tones are just not hearable and a bass is just a strange sort of noise. I believe the cone (I don't know if this is the correct word for the complete black thing which produces the bass tones?) itself has a problem somewhere but it LOOKS fine and I don't really want/dare to open it up.

Any ideas what could be the problem or simple things to try out to find the problem?

Thanks for your replies in advance!

Laurent

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Laurent1602 (archived2)
Bronze
Posted May 31, 2015 at 15:57 GMT
#2250247

Allright, I've measured some things, the woofer still measures 4 Ohm, and all connections and wires are also okay (around 0,5-0,7 Ohm which seems OK given the age of the wires and the not always clean surface I was measuring it on).

You can feel the woofer working just a bit, and when a harder bass tone kicks in or the volume is a bit higher, the strange rattle appears although I can't find anything loose around it. I've captured it on video, maybe someone knows what causes this? (Excuse me for the terrible song, but you can hear it best with some good basses).

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leeshep (archived2)
Bronze
Posted May 31, 2015 at 16:19 GMT
#2250248
Sounds like the voice coil is rubbing. Maybe the magnet has slipped.
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Laurent1602 (archived2)
Bronze
Posted May 31, 2015 at 16:21 GMT
#2250249

Lee wrote:
Sounds like the voice coil is rubbing. Maybe the magnet has slipped.

And how can I check/fix that?

DI
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Die_Bogener
Bronze
Posted May 31, 2015 at 16:27 GMT
#2250250

Have you tried another set of Speakers?

Looks like the amplifier has a Problem, not the Speaker...

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Laurent1602 (archived2)
Bronze
Posted May 31, 2015 at 16:28 GMT
#2250251

Die_Bogener wrote:

Have you tried another set of Speakers?

Looks like the amplifier has a Problem, not the Speaker...

Yes, I switched both speakers before the recap, probem stayed in the same speaker.

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leeshep (archived2)
Bronze
Posted May 31, 2015 at 16:37 GMT
#2250252

The easiest way to check is to gently push the woofer in and out using your fingers. Make sure you push it back in straight and not at an angle, If the voice coil is rubbing you will hear a scraping noise as you do it. 

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leeshep (archived2)
Bronze
Posted May 31, 2015 at 16:37 GMT
#2250253

--- Deleted Duplicate post ---

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leeshep (archived2)
Bronze
Posted May 31, 2015 at 16:37 GMT
#2250254

--- Deleted Duplicate Post ---

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Laurent1602 (archived2)
Bronze
Posted May 31, 2015 at 16:39 GMT
#2250255

Lee wrote:

The easiest way to check is to gently push the woofer in and out using your fingers. Make sure you push it back in straight and not at an angle, If the voice coil is rubbing you will hear a scraping noise as you do it. 

Oh yes, there is a rubbing noise indeed! Thanks already! Now please tell me this is easy to fix 😁

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