Author Topic: Replacing Speakers (Read 3416 times)

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

HTH AMPS · « **Reply #1 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:

TomW · « **Reply #2 on:** October 16, 2007, 06:39:36 PM »

Thanks for the info

Will · « **Reply #3 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

gwEm · « **Reply #4 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).

TomW · « **Reply #5 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?

kevincurtis · « **Reply #6 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

Twinfan · « **Reply #7 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!