OK, here's the scenario. I found the books on the speakers (had to go deeeeeep into storage for that), and they are 4 ohm speakers. The receiver has a manual switch for 0-4 ohms or 8-16 ohms. When using A speakers only, it says to select the range that matches the speakers. I inherited this setup about 5-6 years ago, and don't recall ever changing the switch. It was set to 8 ohms. The receiver has intermittently gone into its protection mode over the past 2-3 years. It now stays in protection mode all the time, i.e. is unusable. The repair guy thought that running 4 ohm speakers with the receiver set to 8 would cause overheating and eventual damage, as alluded to by David below. Any other thoughts are welcome, thanks to all who responded. tx, bmc :) Ben McCafferty ben@volkscafe.com Volks Cafe 1823 Soquel Avenue Santa Cruz, CA 95062 831-426-1244 http://www.volkscafe.com
> From: David Beierl <dbeierl@ATTGLOBAL.NET> > Reply-To: David Beierl <dbeierl@ATTGLOBAL.NET> > Date: Wed, 29 Jan 2003 09:43:59 -0500 > To: vanagon@GERRY.VANAGON.COM > Subject: Re: NVC: measuring impedance of a speaker? > > These are power circuits, and we're talking about a 2:1 ratio of impedance, > so it's not entirely trivial. If you're not running at high outputs it no > doubt doesn't matter -- but if the source and load impedances are not equal > some of the power will get reflected back into the source, which > undoubtedly will cause a certain (small) amount of distortion depending > somewhat on the length of your speaker wires. Also, if the load impedance > is lower than the amplifier is rated to handle (and the ratings vary and so > do the safety margins) the output stage of the amplifier can overheat. In |
Please note - During the past 17 years of operation, several gigabytes of
Vanagon mail messages have been archived. Searching the entire collection
will take up to five minutes to complete. Please be patient!
Return to the archives @ gerry.vanagon.com
The vanagon mailing list archives are copyright (c) 1994-2011, and may not be reproduced without the express written permission of the list administrators. Posting messages to this mailing list grants a license to the mailing list administrators to reproduce the message in a compilation, either printed or electronic. All compilations will be not-for-profit, with any excess proceeds going to the Vanagon mailing list.
Any profits from list compilations go exclusively towards the management and operation of the Vanagon mailing list and vanagon mailing list web site.