No. You should use an AC volt meter at the output of each amp with a sinewave stimulus.
SPL Meter to Match Gains in a Passive Bi Amped Crossover Network
Am passively biamping tube for the mids/tweets and SS for the woofers. I am asking if anyone who has passively Bi amped has a tried and true method for matching gain using a simple SPL meter? Don’t really want to get into a discussion about passive vs active and why you might think I’m wasting my time. I know I’m not the only passive bi amper that’s happy “enough” with passive results. Thanks for your input and taking the time to read this.
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Assuming you have a test signal generator, like pink noise, sure. Most accurate is to use a calibrated mid and phone instead of cheap SPL meters. $20 https://amzn.to/2L38Ga7 You’ll need to use it with an app like Audio Tools which will accept the calibration file. Measure before passive biamping to get the right original signal. Best, E |
The problem with making an acoustic measurement is that it is so sensitively variable with the position and orientation of the microphone. OTOH, if the speaker is still endowed with its original crossover to insure that the upper and lower bands are balanced, an electrical measurement of the input signal is simply more precise. |
I actively bi-amp with two Wilson Benesch Torus Infrasonic Generators which have their own outboard, free-standing amplifier/crossovers. I use a Stereophile test CD with the appropriate low frequency tracks to match the level of the main loudspeakers. I do this using the following instrument: https://www.pce-instruments.com/us/measuring-instruments/test-meters/decibel-meter-pce-instruments-d... You can also use this method to determine the proper subwoofer placement within the room. This is not rocket science. There is no need to make this any more complicated than it is. I hope this helps! |
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