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AUDIO FORUMS >> General Discussion and Support >> Measuring acoustics - Ok to run 1 speaker?
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Message started by Kirk on 06/11/21 at 14:16:04

Title: Measuring acoustics - Ok to run 1 speaker?
Post by Kirk on 06/11/21 at 14:16:04

Really enjoying my UFO2 with my Klipsch Forte IIIs. I rebuilt the Forte networks and want to measure acoustics. Admittedly I have more enthusiasm than knowledge about measuring acoustics. I am using a measurement microphone and REW software and youtube is my friend.

I want to measure individual speakers. I thought I saw somewhere it is a bad idea to power the amp with no load. If that is true, ok to run the amp with 1 speaker?

Title: Re: Measuring acoustics - Ok to run 1 speaker?
Post by ScottGA on 06/11/21 at 16:17:48

I'm sure others will have better and more accurate information for you but you could make a dummy load for the unused channel. Use a matching impedance resistor of the largest wattage you can find that is at least 5 watts since the max you should get from a single channel is 2.3 watts; so 8 or 6 or 4 ohms (matching your Fortes) at 5 watts wired across the unused channel might/should work. Not sure it would hurt to have the channel unterminated if you have no signal on it but I'll leave that to others to expound on.

Title: Re: Measuring acoustics - Ok to run 1 speaker?
Post by GroovySauce on 06/11/21 at 16:54:02

You can have REW do left and right channels independently. REW will measure in room response, not isolated speaker response. AFAIK REW doesn't do gated time windows, which in theory removes the room from the measurement.

Title: Re: Measuring acoustics - Ok to run 1 speaker?
Post by EdwardT on 06/11/21 at 22:21:13

You should double check this reply but I think Steve recommends running the output shorted as opposed to no speaker load. I read that somewhere in one of the many owner's manuals but I don’t recall exactly where.