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8 ohms v. 4 ohm speaker load #66300
05/29/06 05:02 PM
05/29/06 05:02 PM
R
Redsy  Offline OP
Member
Joined: Mar 2001
Posts: 2,056
Bucks County PA
Generally speaking...

Can I connect 2 sets of 8 ohm speakers (4 ohm load) to a single stereo output?

I have an A / B switch for my interior & exterior speakers, but I'd like to connect another set to my exterior speakers.

Thanks!

Work Gear for Electricians and the Trades
Re: 8 ohms v. 4 ohm speaker load #66301
05/29/06 06:27 PM
05/29/06 06:27 PM
B
briselec  Offline
Member
Joined: Dec 2005
Posts: 141
Brisbane, Australia
I've seen it done. Doesn't mean you should though

Re: 8 ohms v. 4 ohm speaker load #66302
05/29/06 07:40 PM
05/29/06 07:40 PM
N
NJwirenut  Offline
Member
Joined: Sep 2001
Posts: 806
Bergen County, NJ
Completely depends on the amplifier. Some are rated to drive 4 ohm loads, some aren't.

Re: 8 ohms v. 4 ohm speaker load #66303
05/29/06 07:54 PM
05/29/06 07:54 PM
T
TwinCitySparky  Offline
Member
Joined: Mar 2006
Posts: 52
Minnesota
If the amp is not rated to handle 4 Ohm loads, you can always safely connect the speakers in series creating a 16 Ohm load. As long the speakers are similar in design. The power will be shared resulting in lower volume levels though.

Re: 8 ohms v. 4 ohm speaker load #66304
05/29/06 08:04 PM
05/29/06 08:04 PM
S
SolarPowered  Offline
Member
Joined: Jul 2004
Posts: 625
Palo Alto, CA, USA
I don't think I'd want to connect speakers in series. Their impedance is complex function of frequency, and you will almost certainly get artifacts from the interaction of the speakers.

The amplifiers that were made to drive Apogees did very well into low-Z loads--the Scintillas dropped below 1 ohm, and had a reputation as amplifier killers. Pretty soon there were amps made to drive those loads--Krell, Aragon, I think maybe some of the Mark Levisons, and some of Nelson Pass' designs.

Re: 8 ohms v. 4 ohm speaker load #66305
05/29/06 08:54 PM
05/29/06 08:54 PM
T
TwinCitySparky  Offline
Member
Joined: Mar 2006
Posts: 52
Minnesota
The question was general. I dont think we are talking high-end equipment here. But, maybe I'm wrong (It has happened before)

Re: 8 ohms v. 4 ohm speaker load #66306
05/30/06 01:36 AM
05/30/06 01:36 AM
E
e57  Offline
Member
Joined: May 2003
Posts: 2,876
S.F.,CA USA
Yes that was some serious name dropping there....

Personally, I'm on some B&W's (C-4 towers)through a Rotel, very nice beginner set up.

To answere the question, YES, but I would suggest you check your amp for matching that load. If not, Russound has some impedance macthing speaker selectors and volume controls that will do the job nicely. (Low grade, no oxygen free copper contacts and whipes...)


Mark Heller
"Well - I oughta....." -Jackie Gleason
Re: 8 ohms v. 4 ohm speaker load #66307
05/30/06 03:06 AM
05/30/06 03:06 AM
T
techie  Offline
Member
Joined: May 2005
Posts: 247
palo alto, ca usa
Personally, I like Meyer, powered by Crest, driven by Gamble.. or the Meyer self-powered systems..

Re: 8 ohms v. 4 ohm speaker load #66308
05/30/06 03:07 AM
05/30/06 03:07 AM
T
techie  Offline
Member
Joined: May 2005
Posts: 247
palo alto, ca usa
IIRC, some of the old McIntosh amps would drive loads down to 1 ohm (maybe even 1/2 ohm..)

Re: 8 ohms v. 4 ohm speaker load #66309
05/30/06 03:21 AM
05/30/06 03:21 AM
T
techie  Offline
Member
Joined: May 2005
Posts: 247
palo alto, ca usa
You could also use a constant voltage (25 or 70v) system, depending on the number of speakers, power level, and length of the cabling.

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