@erik_squires Voltage out does not equal SPL out. You may get the amps giving the same output but differences in driver efficiency will make the SPL different.
Bi-Amping: How can I determine relative output?
Long Story Short: I have a 50w/channel pair of tube monos, and a 300w stereo solid state amp playing through a set of JBL 4367s. two way monitors.
The tubes are on the horn tweeter and the solid state is on the 15" woofer, crossover is apparently 700hz.
Doing absolutely nothing, some music sounds completely "normal" and some music sounds artificially bass heavy.
The solid state amp has gain adjustments for each channel.
I have a Fluke 115 multimeter, and access to plenty of test tones, but nothing to read SPL.
Is there a way to measure output at the speaker terminals such that I could dial the woofer amp down to "match" the tube amps?
If so, would this be more or less constant as the preamp driving the amps changes volume, or would it only "match" (to the extent that it actually matches at all) at one volume level?
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@erik_squires Oh shoot I was thinking about the way I do it with an outboard crossover. You are right.
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The issue is that even if you can measure, WHAT are you measuring? Which frequency? The SS and tube amps will respond differently over the impedance curve of your speakers! The SS amp will dump more power into impedance dips and less into peaks. The tube amp will remain more consistent, but generally reduces its output on both peaks and dips. Therefore, the calls to just use your ears are not wrong. However, perhaps you can use your ears more effectively. Here's what I'd do, to "broadband" level-match the tube and A23+, easy peasy:
Note I haven't tried this; just kinda what I thought up now given your situation. I do have an A23 floating around here and the gain pots can be handy. |
- 18 posts total