1501 in a twin??

Jordan Shapiro · Post by **Jordan Shapiro** » 10 Oct 2005 6:58 pm

I just tried putting a 4ohm black widow in my twin reverb and it just don't sound as loud as I thought it might.

Have I pulled a boo-boo? I figured any ol 4 ohm speaker would do fine.

The sound is nice and smooth, but............

Might it be that the black widow needs more power running through it to really drive it correctly? I must admit I've never personally played a twin with a 15" in it, so I don't exactly know what to expect, but it don't sound as 'driven' as Ricky or lloyd.

Or I could be just a little paranoid and all is well. I just don't want to blow my amp up. I don't really have much but a somewhat "keen sense of the obvious" to work with here.

Any input would be greatly appreciated,
JOrdan
323-819-0959

Jack Stoner · Post by **Jack Stoner** » 11 Oct 2005 2:21 am

The Twin is designed for a 4 ohm load so the 4 ohm BW should be OK.

It's more efficient than many speakers so that wouldn't be a problem.

Perhaps it's just a bad speaker or it's not what you expected.

I had a Twin and replaced it with a 4 ohm JBL K130 (there weren't any BW speakers back then).<font size="1" color="#8e236b"><p align="center">[This message was edited by Jack Stoner on 11 October 2005 at 05:17 AM.]</p></FONT>

James Morehead · Post by **James Morehead** » 11 Oct 2005 2:58 am

The Vibrosonic is designed for an 8 ohm load. Any Twin Reverb I've seen stock takes a 4 ohm load. You can do two speakers of 8 ohms to get a 4 ohm load.

Larry Robinson · Post by **Larry Robinson** » 11 Oct 2005 3:01 am

My Twin Reverb had two 12" 8 ohm speakers wired parallel and the OT was 4 Ohm. I replaced the 12's with one JBL 15" 4 ohm speaker and had not problems. It could be that someone has modified the amp for an 8 ohm load. Most TR amps I have seen were 4 ohm output impedance. I'd try another speaker. Also, it could be the OT.

Larry Robinson

Donny Hinson · Post by **Donny Hinson** » 11 Oct 2005 3:14 am

So, were you expecting an increase in volume? Even though the 1501 is (was) one of Peavey's best (read: most efficient) speakers, it probably wouldn't sound any louder than the two twelves you're replacing.

jim milewski · Post by **jim milewski** » 11 Oct 2005 3:43 am

take it out on a job etc, give it some time, it should sound great with the Twin/BW1501 combo, my twin was a four ohm output, as stated above it probably won't be much louder than with the stock speakers but at the higher volume levels I think the BW will sound more up to the task. How was it to put in? It took me a while to place the speaker right as to not hit the transformer, but a nice mod to a great amp!

Jordan Shapiro · Post by **Jordan Shapiro** » 14 Oct 2005 2:23 pm

What I was saying was that it actually seemed as if I had lost volume when the BW went in. The 2-12s were louder. and punchier.
I had lucked out and found a cabinet already done up with a 15" baffle, placed correctly, so it was an easy in/out.
I actually found a twin with the jbl already in it, so when it gets here, I can listen to the 2 amps side by side.
The one I have here now (w/2-12's) is a 1970 no master vol. that has been blackfaced. the one with the jbl in it that will be on it's way shortly is a 69'( no mast. vol.) that has not been blackfaced, although it has been "Sarno'd". I'm interested to see if I can really hear any difference in the two.
J