Bare Knuckle Pickups Forum

Forum Ringside => Tech => Topic started by: TomW on October 16, 2007, 06:06:03 PM

Title: Replacing Speakers
Post by: TomW on October 16, 2007, 06:06:03 PM

I have managed to get my hands on a cheap Celestion g12h and Im just wondering if it is ok to have 3 g12t-75's and one g12h in my cab untill i manage to save up for some more speakers, or will this damage my amp?
Thanks

Title: Replacing Speakers
Post by: HTH AMPS on October 16, 2007, 06:20:45 PM

It won't damage your amp, but you always rate your cab by the speaker with the lowest power handling.  So with the G12H being a 30w speaker you've essentially got a 120w cab and wouldn't want to run a 100w amp much louder than half way to be safe.

 :twisted:

Title: Replacing Speakers
Post by: TomW on October 16, 2007, 06:39:36 PM

Thanks for the info

Title: Replacing Speakers
Post by: Will on October 16, 2007, 07:04:42 PM

What is a safe formula to work by?

I heard that a 50w head puts out 80w at max somewhere

Title: Replacing Speakers
Post by: gwEm on October 17, 2007, 09:02:12 AM

its stating the obvious i know, but its a good idea to make sure all the speakers have the same impedance.

regarding power ratings, a 50w amp will push out more than 50w, but a 30w speaker will also handle more than 30w too (at least if we go by celestions ratings).

Title: Replacing Speakers
Post by: TomW on October 17, 2007, 03:34:26 PM

Well I managed to replace the speaker last night and it sounds good so far. Its abit fizzier than I expected but I'm guessing thats because its new and hasn't broken in yet, and I have only played through it at very low volumes.
I'm guessing that by using a hotplate I should be able to crank the amp more than half way without damaging the speaker. Is this correct?

Title: Replacing Speakers
Post by: kevincurtis on October 18, 2007, 10:25:29 AM

I would second checking the impedance matching, celestions website has some useful tips and links:

http://professional.celestion.com/guitar/features/drdecibel/index.asp

Title: Replacing Speakers
Post by: Twinfan on October 18, 2007, 11:08:21 AM

Quote from: TomW

Well I managed to replace the speaker last night and it sounds good so far. Its abit fizzier than I expected but I'm guessing thats because its new and hasn't broken in yet, and I have only played through it at very low volumes.

Yep, it's not broken in.  Get it somewhere where you can crank it for a good hour or so.  That'll get rid of the majority of the fizziness.

Quote from: TomW

I'm guessing that by using a hotplate I should be able to crank the amp more than half way without damaging the speaker. Is this correct?

Correct!