• From: western north caroilna
  • Registered: 2008-06-16
  • Posts: 47

Topic: Speaker cabinet

I'm thinking of building a 1x12 closed back ext. cabinet for my combo amp. Its a traynor ycv50 loaded with a celestion vintage 30. I won't more low end and for it to be tighter with a quicker punch. I have plenty of birch and maple plywood laying around and all the tools I need to build it. After listening to all of eminence's speakers online I like the private jack the best. I won't to be able to switch between the ext cab and the combo's speaker and also run them both at the same time. My questions are what kind of footswitch apparatus will I need and how do you compensate for the volume loss when going from two speakers to one? Also like to hear some other speaker suggestions.

  • From: Pittsburgh
  • Registered: 2008-05-22
  • Posts: 261

Re: Speaker cabinet

The EVM12L seems to be the speaker of choice for a lot of players including Joe.  It's got a great tight low end.
If I understand you correctly you want to be able to switch between the combo speaker and an extension cab, right?

I've personally have never seen this done but I'm sure it's possible.  With some good old yankee ingenuity you could probably rig up a speaker selector switch and then figure out how to do it remotely. Maybe even with a simple A/B box. Good luck 

As far as the volume difference I can't think of a way around it...it's simple physics of moving air and sound pressure.  You could shield off the extension cab I guess with some plexiglass.

DannyG's Website

  • From: Germany
  • Registered: 2008-04-23
  • Posts: 553

Re: Speaker cabinet

I'm not a technician but it should be possible. wink
What about a simple on/off switcher between ext. speaker out and cab? Just make sure the inbuilt speaker doesnt get muted if the ext. speaker is connected.
Yes the EVM 12L is indeed a great speaker but needs some volume to shine.

Alex

...it's a musical journey
www.u2-experience.de

Stratovari's Website

  • Rocket
  • Rocket
  • BONAMEGAMETAL
  • Offline
  • From: San Francisco
  • Registered: 2006-04-26
  • Posts: 10,275

Re: Speaker cabinet

If wired in series (positive terminal of 1 to the negative of the second, etc....think of batteries, the + of one is up against the - of the other) the impedance will go down when "switched" (whatever scheme you choose to incorporate) and therefore power output will be higher and certainly sound will compensated for, maybe too much without slight attenuating resistor.  wink

Rock On & keep the Faith,
Rocket

"He still doesn't charge for mistakes! wink"
http://jbonamassa.com/tour-dates/
"Everybody wants ta get inta the act!"
“Now, this isn’t your ordinary party crowd, here.  I mean, there are professionals in here.”
  • Registered: 2007-09-30
  • Posts: 556

Re: Speaker cabinet

Do not use an A/B box - you need one of these to do this safely.  A/B boxes are made for a guitar signal, not a amp to speaker signal.


http://www.pedalgeek.com/cgi-bin/new_sh … ink--rtbcb



Ben

  • From: Pittsburgh
  • Registered: 2008-05-22
  • Posts: 261

Re: Speaker cabinet

Ben.  very cool.  I didn't even know they made such a thing.  Thanks.

DannyG's Website

  • From: western north caroilna
  • Registered: 2008-06-16
  • Posts: 47

Re: Speaker cabinet

Thanks for the info guys.