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In the Forum: Horn-Loaded Speakers
In the Thread: Deep End DIY - Australian take one Macondo.
Post Subject: I decided to test the maths...Posted by anthony on: 10/5/2017
...so I measured Vac at the Junction Box for a -12dB 120Hz sine. And I measured a DC-200Hz sweep in REW.
Then I added 8m of 14AWG wire between the amp and the Junction Box and measured the same things.
By adding the 8m of 14awg Vac at the Junction Box dropped 12% and the SPL sweep show a SPL drop between about 1dB and 0.2dB across the spectrum, average if I had to guess was about 0.5dB.
Then I did the maths to determine what the drops should have been: 11.5% and 0.55dB. That is very close! I think that I am on the right track and so that I don't burn too much amplifier power I really do need very low resistance cables.Rerurn to Romy the Cat's Site