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Recently I built a cab to house the speaker that was in my classic 30. Instead of making a new jack for those speaker wires, I taped them so they don't touch and taped them off to the side. Right now I'm using a regular instrument cable that goes from the extension speaker jack on my amp to the jack on the cab I built. It works fine, but when I did it the speaker started to flab out when I tried turning it up loud. After awhile, it started doing it at low volumes also... so I got a new speaker (Jensen C12N, sounds great). Well, now I'm having some noise problems, and I notice just a TINY bit of buzz. The noise wasn't a problem before. What might be causing this?

My question is, when you use the extension speaker out, does the speaker need to be a different impendence? (the Jensen is 16 ohm, as was the stock speaker) Should I make a jack for the original wires and use that instead?

Also another question. 1 speaker is 16 ohm. If you were to use 2 speakers, would they both need to be 8 ohm? (maybe a stupid question)

Right now I'm using a regular instrument cable that goes from the extension speaker jack on my amp to the jack on the cab I built.

Do you mean you are using a quot;guitarquot; cable? If so that's a NO NO. You must use quot;speakerquot; wire. (Not shielded cable) Speaker wire is just regular wire like you'd find in a household extenstion cord. Go to the hardware store and get an appropriate lenght of 16guage or lower (Lower = thicker = better)I'm not sure what you mean about the extention speaker. Please clarify. Are you running two speakers or just one and what are thier impedences? What load does the amp want to see?

If the amp wants to see a 16 ohm load you need one 16 ohm speaker or two 8 ohm speakers run in series. There's a recent thread here with a pic of common speaker set-ups and their resulting impedences.

Hehe, yea I'm using a guitar cable. That's all I had at the time, and it worked, so I used it... I'm BROKE right now... should I stop playing through it until I get one? What can happen if I continued to use it?

Sorry for the confusion. I'm only using one 16 ohm speaker. This is what the stock speaker was. There is no speaker in the amp, so it's basically just a head. I have a cabinet that houses the Jensen, and that's all I use. I run a guitar cable from the quot;Extension Speakerquot; jack on the back of the amp to this cab.

Also another dumb question. When I turn off my amp, about 2 seconds later there's a semi-loud thump. Is this normal? What causes that? Is it bad? I don't remember this happening when I play with other tube amps, or maybe I've gotten used to it and I just don't notice it...

thanks for your help

If you are running from the extension speaker jack on the C30 you are running off of the 8 ohm tap of the transformer. And yes stop playing using the guitar cable.

wow i feel like a dumbass... thanks guys. i'm off to buy a SPEAKER cable

alright... is THIS ok...

I connected the wires that originally went to the speaker to a 1/4 inch jack, and mounted it. I bought an quot;Audio Cablequot; from radio shack. They had guitar cables, audio cables, and speaker cables. The speaker cables didn't have the right ends on them, so I bought the audio cable. It's shielded, and it sais quot;for connecting audio components.

If I'm wrong again, I can take it back. But is this what I need?

Sorry Cory, but you got it wrong again.

You don't want sheilded cable for speaker wires. Radio Shack should have what you need. They handle quite a bit of pro-audio stuff.

It must be speaker cable. RS's will normally be clear, with copper colored wire inside.





Why not??? What's wrong with shielded cable? Will it hurt the speaker? Can someone please expain to me why you can't just use a regular cable for this kind of stuff? I mean, it works. You plug it in, sound comes out.

******. Well, if I try to use quot;speaker wirequot;, how do you connect a 1/4 inch jack to a 1/4 jack?

Will someone please link me to an example of EXACTLY what I need? I'd really appreciate it...

Thanks

your best bet would just be to visit the music store nearest to you and buy yourself a speaker cable that's made for use specifically with guitar amps. the people there will know what you're talking about and they will give you the right cable.

shielded cable only really applies to connecting your guitar/pedals/processers/what have you, to your amp. someone might be able to explain this better than i can (please correct me if i'm wrong), but shielded instrument cable (like what you use to connect your guitar to your amp) will make sound come out when used to connect the speaker, but it isn't designed to carry the actual power that is sent out your amp, thus causing damage to your amp's output section or the speakers.