Need Help!!!Mesa Boogie 1x15 farting on low freq.

Bunyo · #1 04-07-2011, 10:23 AM

Ok, here is the thing.
I got two 1x15 RR Mesa Boogie plugged into Mesa 400+.
Lastly one of my speakers EV 15L is making farting sound on lower tones when the amp is pushed harder. Firstly I didnt noticed it, but when I stand closer to speaker I can hear unpleasant sound.
Strange thing is that it sometimes happen and sometimes not. For example when I push the membrane by finger its not farting for a few seconds. Im pretty sure that problem is with speaker. Do you guys think that it can be fixed, or should I look for a new speaker and replace it???
Please help.

BassmanPaul · #2 04-07-2011, 10:42 AM

I would think the EV re-cone kits should be readily available so I say have it fixed.

Bunyo · #3 04-07-2011, 11:52 AM

Paul so you think that reconing will solve the problem?

Randall · #4 04-07-2011, 12:18 PM

It may need a recone or you may just need to turn down. I can easily make my ev 15 speaker fart with loud volume and/or lots or bass eq. Sound fine otherwise since I bought it in 1983.

rockstarbassist · #5 04-07-2011, 01:07 PM

Yeah if you're running uber-low/detuned bassy freq's through that cab/driver, it can happen. Just turn down your "Bass" some if you're going for max volume on the amp.

Bunyo · #6 04-07-2011, 01:17 PM

But I dont run detuned bass and hopefuly never will

This membrane just acts weird. It looks like its outer part influenced by strong vibration cannot get back to its original position. Looks like it was jammed, and I think thats how fart originates. After I push its ok for a while. And it is not normal farting from very low frequencies, its some mechanical membrane disfunction. Thats what I think after closer observation. Anybody seen something similar?

Bunyo · #7 04-08-2011, 07:12 AM

Anybody???

rekesbass · #8 04-08-2011, 08:24 AM

without actually being there it's hard to pinpoint from here but I'll offer this..When I had a 400 back when,I found I was getting some nasty tones until I removed the head from the top of the cab. the vibration was doing some wonky stuff to the head and it stopped when I took it off. it may be a long shot but,try to isolate the head from the cab and see if it continues..I guess thats why they had shock mount head cases for that head. like I said,a long shot but,worth a try...

sorry,didn't read your last post.....I got nothing....

Randall · #9 04-08-2011, 09:30 AM

Plug one cab in only and test at same setting. You will hear which cab is defective.

Bunyo · #10 04-08-2011, 09:38 AM

I know exactly which cab is defective simply dont know if this is membrane or something else.

Randall · #11 04-08-2011, 09:47 AM

Speaker recone time then. kits are readily available. I believe it also upgrades it to the 400 watt version.

Bunyo · #12 04-08-2011, 09:55 AM

And I already have 400 watt.

Bass_Pounder · #13 04-08-2011, 10:33 AM

Quote:

Originally Posted by Bunyo

But I dont run detuned bass and hopefuly never will

This membrane just acts weird. It looks like its outer part influenced by strong vibration cannot get back to its original position. Looks like it was jammed, and I think thats how fart originates. After I push its ok for a while. And it is not normal farting from very low frequencies, its some mechanical membrane disfunction. Thats what I think after closer observation. Anybody seen something similar?

Sounds like you are describing cone creasing.

Time for a recone.

Alex1984 · #14 04-08-2011, 12:46 PM

Heard good things about Eminence speakers in these cabs too, but EV certainly has a good thing going too.

Queg · #15 04-08-2011, 12:55 PM

Quote:

Originally Posted by Alex1984

Heard good things about Eminence speakers in these cabs too, but EV certainly has a good thing going too.

The Eminence 3015 (non-LF) sounds great in this cab, and can go lower/handle a bit more power than the EV 15L. The 15L still deserves a re-cone though, such a classic tone.

er, full disclosure: I'm about to post a 3015 for sale in the classifieds.

bjabass · #16 04-08-2011, 01:05 PM

Yeah, I vote recone it too. If there is any deformity of the cone that could cause the coil to be off just a little in the magnet cavity and touch the magnet, eventually it will short or open the coil and kill the speaker. If it is a replaceable driver, you can actually see the area that was touching and usually a little burned spot on the coil where it rubbed the magnet.

Calaverasgrande · #17 04-08-2011, 01:35 PM

I would look into getting a recone of the original EV. Those have a certain tone to them that is part of the "Boogie sound". Also if your other cab is an identical cab with an identical driver you should, in theory, be better off running like drivers. Jumping ship for an Eminence driver (or some other good brand) may be easier for you in Poland, but mixing drivers has mixed results. Sometimes it is stellar, liek when I ran a JBL loaded Eden 15 with an EV loaded Mesa 15. Sometimes it's a recipe for mud, liek when I ran a Mesa 4x10 with an Ampeg 4x10.

Bunyo · #18 04-08-2011, 01:42 PM

My second cab is driven by EV but rated 200 watts. But to be honest I didnt realized much difference in volume when I use them both at once. Right now I'm seriusly considering reconing bad one with EV replacement kit. I really would like to stay with EV. Im sure that this damaged one is 15L 400 watts, but I dont know if it is pro line. Do you think that this kit will fit?:
http://www.soundspeakerrepair.com/sp...+Drop-in+Kits/

Calaverasgrande · #19 04-09-2011, 11:54 AM

If it is an EVM 15L you are fine. To be sure I would copy the numbers stamped on the back of the speaker and shoot an email to the parts supplier.
Honestly though, reconing is messy and tricky. I have always paid someone else to do it for me. Better to pay once for a job done right than twice for a job done wrong.

Bridge Cables · #20 04-09-2011, 10:55 PM

Sounds like you need a recone for the EVM-15L. I remember reading from Bill Fitzmaurice, he noted both the 200 watt and 400 watt versions do not have that much xmax especially compared to speakers available today. That may be a problem running a lot of power from the 400+. I gotta say the tone from the EVM 15L is really great (subjective).

BC