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So I have velodyne fsr-15 and f1500(drivers and wiring are identical btw)
Amps looks a little different

I bought Dayton audio spa250dsp

Forgot to measure subwoofer impedance. Both measure 6ohm. So looks like these velodyne drivers are 8ohm. I noticed most speakers impedance is 2ohm less than resistance measurements with multimeter

So now I have 125w available into 8ohm sub

I don’t blast music loud. Sub is more for sub 50-60hz sounds. Usually i set it at the minimum cross over point around 40hz

Will the sub sound bad at lower volumes.. or do you think it will clip

Original velodyne amp does not look like 250watts per channel
Maybe 100watts

Attached are images of velodyne amp. Maybe we can estimate real power

output

4 50v 4700uf filter caps, 2 stk4040ii power amplifiers

Attached Images

15755878270883732499910786556289.jpg (639.4 KB)