From organtec@charter.net Sat Sep 10 14:32:42 2011
Subject:Re: Leslie woofers 16-ohm

Chris,

Not nitpicking. Solid state amps favorite impedance is 4 ohms. It seems to happen that way with solid state outputs, EXCEPTION, transformer coupled.





From: CloneWheel@yahoogroups.com [mailto:CloneWheel@yahoogroups.com] On Behalf Of Chris Richmond
Sent: Saturday, September 10, 2011 11:42 AM
To: CloneWheel@yahoogroups.com
Subject: RE: [CWSG] Re: Leslie woofers 16-ohm





Keith,

You are mostly correct, but I have to take minor exception with your comments on solid state amps.
You are correct, assuming nothing in the design was limiting the output power at low impedance, however
if the amp’s power supply was current limited or the amp had overall thermal limits with a 2 ohm load, but
not so with a 4 ohm load, then you may actually get a power rating that looks different than what you predict.
Example: 400w@2ohms, 275@4ohm, etc. Sorry if that seems like picking nits.

Chris

From: CloneWheel@yahoogroups.com [mailto:CloneWheel@yahoogroups.com ] On Behalf Of Keith H Clark
Sent: Saturday, September 10, 2011 6:54 AM
To: CloneWheel@yahoogroups.com
Subject: RE: [CWSG] Re: Leslie woofers 16-ohm
There are some amps which are rated at a 2 ohm load. Deceptive advertising which gives greater power output figures and makes it look more powerful. Yes, the amp will probably work at that load impedance as it was built to do so. But as far real power rating, the STANDARD impedance for ratings is for 8 ohms. So an amp rated @ 400 watts into 2 ohms is just that. Into 4 ohms it will deliver half or 200 watts. Into 8 ohms, 100 watts. Not so impressive now, is it?

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