Question of ohms.....again

docrock55 · May 5th, 2004, 09:21 PM

If I add a speaker out to an amp that has a Internal speaker rated at 8 ohms, can I run another 8 ohm speaker without causing problems? Series or parallel ?
I want both speakers to be on, without the new jack cutting off the Internal speaker. Any help would be greatly appreciated.

Red Planet · May 5th, 2004, 11:30 PM

What amp? What ohm load is the amp rated at? What taps are available on the tranny? Tube or Solid state.

docrock55 · May 5th, 2004, 11:36 PM

Fender Princeton 112 plus, solid state. Ohm load is 8, not sure what taps are. :?

Red Planet · May 5th, 2004, 11:44 PM

No you cant do that. If that amp is rated at 8 ohms minimum load and you run two 8 ohms speakers parallel you drop the ohm load to 4 ohms and toast the output transformer. I have done this.

You can run the two speakers in series wiring which will be a bit odd to wire it (you'll need a daisy speaker cord made) but you will notice a drop in power (by half) and that kind of defeats the reason for adding another speaker.

The best way to do this is to use two 16 ohm speakers wired in Parallel which will give you 8 ohms. That will give you the best results.

Good luck to ya :D

Ringo · May 5th, 2004, 11:57 PM

It may not be 8 ohm minimum, try to contact someone at Fender and ask them if you can run an ext cab with another 8 ohm speaker.
You can easily rig up a speaker out from the extra terminals on the speaker.

I know some of the older Peavey ss combo amps didn't have a speaker out and have been converted to run an ext cab with no problems.
But I'd ask a tech or someone at Fender first.

May 5th, 2004, 09:21 PM	#1 (permalink)
docrock55 TDPRI Member Join Date: Apr 2003 Location: Portland, Oregon Posts: 84	Question of ohms.....again If I add a speaker out to an amp that has a Internal speaker rated at 8 ohms, can I run another 8 ohm speaker without causing problems? Series or parallel ? I want both speakers to be on, without the new jack cutting off the Internal speaker. Any help would be greatly appreciated.

May 5th, 2004, 11:30 PM	#2 (permalink)
Red Planet Tele-Meister Join Date: Feb 2004 Location: North Georgia Posts: 421	What amp? What ohm load is the amp rated at? What taps are available on the tranny? Tube or Solid state. __________________ RC Cola and a moon Pie!

May 5th, 2004, 11:44 PM	#4 (permalink)
Red Planet Tele-Meister Join Date: Feb 2004 Location: North Georgia Posts: 421	No you cant do that. If that amp is rated at 8 ohms minimum load and you run two 8 ohms speakers parallel you drop the ohm load to 4 ohms and toast the output transformer. I have done this. You can run the two speakers in series wiring which will be a bit odd to wire it (you'll need a daisy speaker cord made) but you will notice a drop in power (by half) and that kind of defeats the reason for adding another speaker. The best way to do this is to use two 16 ohm speakers wired in Parallel which will give you 8 ohms. That will give you the best results. Good luck to ya :D __________________ RC Cola and a moon Pie!

May 5th, 2004, 11:57 PM	#5 (permalink)
Ringo Tele-Afflicted Join Date: Mar 2003 Location: Memphis TN Posts: 1,927	Ask Fender if it is 8 ohm min It may not be 8 ohm minimum, try to contact someone at Fender and ask them if you can run an ext cab with another 8 ohm speaker. You can easily rig up a speaker out from the extra terminals on the speaker. I know some of the older Peavey ss combo amps didn't have a speaker out and have been converted to run an ext cab with no problems. But I'd ask a tech or someone at Fender first.

May 5th, 2004, 11:36 PM	#3 (permalink)
docrock55 TDPRI Member Join Date: Apr 2003 Location: Portland, Oregon Posts: 84	Fender Princeton 112 plus, solid state. Ohm load is 8, not sure what taps are. :?