Has my EV blown ?

[Boogie Woogie Man]

My Mk lll EVL loaded combo is worrying me. Graphic on classic V, bass on 4, master 3, middle-3 and R1 on 7 for a good clean sound. With my 53 Tele in the mid position the bass is breaking up to the point of distortion. I am waiting for new tubes to arrive but I think maybe the EV is suspect.

 

[HamerFan]

I had an EV give me trouble at on point. Turned ot there was a tiny little tear in the speaker. Inspect it thoroughly.

 

[Boogie Woogie Man]

I have just checked the speaker very very closely and it looks okay to me, no sign of tearing or anything similar.

 

[MrMarkIII]

Class A or Simul? Didja try turning the bass down? Is the Bass Shift or Deep pulled?

 

[Boogie Woogie Man]

It's a simulclass and there is no way I can pull deep or shift bass, that drives the distortion on the bass notes crazy.

 

[MrMarkIII]

Play the open "E" string. As the note dies out, and is almost gone, is there a "Fiizzzzzzzzh" audible, particularly from the center of the cone? That's a good sign of voice coil rub.
Is there another speaker to A/B it with?

 

[phyrexia]

Have you tried other speakers with the amp? Other amp with the speaker?

 

[Boogie Woogie Man]

Play the open "E" string. As the note dies out, and is almost gone, is there a "Fiizzzzzzzzh" audible, particularly from the center of the cone? That's a good sign of voice coil rub.
Is there another speaker to A/B it with?

Yes, there is an audible Fuzzzzz as it dies out, I had hoped that it was a tube problem but obviously not. What does coil rub mean and can it be repaired ?
I don't have another speaker to try but I can borrow one this weekend to try.

 

[phyrexia]

Your speaker probably needs to be reconed. It was $85 when I paid to have one reconed ($50 parts $35 labor IIRC)

 

[MrMarkIII]

Play the open "E" string. As the note dies out, and is almost gone, is there a "Fiizzzzzzzzh" audible, particularly from the center of the cone? That's a good sign of voice coil rub.
Is there another speaker to A/B it with?

Yes, there is an audible Fuzzzzz as it dies out, I had hoped that it was a tube problem but obviously not. What does coil rub mean and can it be repaired ?
I don't have another speaker to try but I can borrow one this weekend to try.

The voice coil in the middle of the speaker is, well, think of a Slinky toy wrapped around a 3" diameter empty toilet paper roll. This all has to fit into a very narrow circular gap in the magnet structure. If it gets out of round, due to too much heat (playing very loud, or maybe it's just old), the "Slinky" coil will rub against the sides of the gap. Furry sounds result. Not fatal in itself, but it won't get better by itself, either. Time for a re-cone. It should be worth it if it's an original made-for-Boogie EVM 12L, 'specially if it has the Mesa sticker on the back. Good luck!

 

[Boogie Woogie Man]

I will have to try and find someone in the UK who can do it. My speaker does not have the sticker on the back but it is definitely EV.
Thanks for all your help everyone.

 

[phyrexia]

A fresh EV is a mighty speaker.