Thanks folks for your quick replies. I've dug out the manual and even though the specifications say it can do 4 ohms in bridged mode, there is another statement that says it doesn't recommend it.
Here is what it says about bridged mode: "The A channel handles the positive voltage and the B channel becomes the negative, thus doubling the output voltage swing." Needless to say, Poul's comment regarding running them as two separate channels because if one fails I'll have another as a spare is the clincher for me. Being from an IT background - backup is all important. Thanks folks! 2008/10/11 Javier Herrero <[EMAIL PROTECTED]> > If 500W are specified for a 4 ohm load, you will only obtain 250W for > each channel over a 8 ohm speaker. In bridged mode, it is not true that > basically one channel drives the upper part of the sine and the other > the lower: they operate in push-pull, supplying each side of the speaker > with opposite phases so you will obtain the double peak-to-peak voltage > value over the load than in the single ended configuration. Double > voltage would mean four-times power, so the amplifier surely is not > rated for the same load in bridged mode than in single-ended two-channel > mode. If minimum load for each channel is 4 ohm in single-ended mode, > usually it is 8 ohm for two channels in bridged mode. > > So if you have 8 ohm speakers... use it in single ended mode (better > reliability also, as Poul-Henning pointed), and you will get 250W per > channel. In brigde mode, you could only put the two speakers in parallel > if the amplifier is rated for 4 ohm loads in bridged mode. > > Regards, > > Javier > > Jim Palfreyman escribió: > > OK I have an interesting but simple problem that has nothing to do with > > time. But I'm sure someone on this list will know. And besides I can't be > > stuffed finding another list with such a good S/N ratio. > > > > In my spare time I play in a band. > > > > I have a 1000W amplifier that can be either two 500W stereo channels or a > > single 1000W mono running in "bridged" mode. (Basically one channel > > amplifies the upper part of the sine curve and the other the lower.) > > > > The amp can drive speakers down to 4 ohms. > > > > I have two 8 ohm speakers. > > > > The source is mono. > > > > Do I run each 8 ohm speaker on its own 500W channel? > > > > or > > > > Do I run in bridged mode and put the two speakers in parallel onto the > 1000W > > amplifier? > > > > Any takers? > > > > Regards, > > > > Jim > > _______________________________________________ > > time-nuts mailing list -- [email protected] > > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > > > > > -- > ------------------------------------------------------------------------ > Javier Herrero EMAIL: [EMAIL PROTECTED] > HV Sistemas S.L. PHONE: +34 949 336 806 > Los Charcones, 17A FAX: +34 949 336 792 > 19170 El Casar - Guadalajara - Spain WEB: http://www.hvsistemas.com > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
