Here is good video of it, sub is on a piece of foamboard.
https://drive.google.com/file/d/1N8j50ldbVXHofx9fqXEJim92drT1lWk2/view?usp=drive_link
Its baffling me.
https://drive.google.com/file/d/1N8j50ldbVXHofx9fqXEJim92drT1lWk2/view?usp=drive_link
Its baffling me.
I am looking for temporary substitute option while I find an oem replacement. Would I be wasting my time getting a Sundown car sub like this to work in such a small enclosure?
The SA10" V2 has a 37Hz Fs and Mms of 319grams, which I'd guess is higher than the Sunfire OEM driver, probably won't have as much LF output with the Carver Knight Shadow processing and power.
I sprung for a replacement driver with the smallest enclosure requirements I could find, it was a Ultimax II 10" Carbon Fiber Cone subwoofer from Dayton Audio which calls for a .8 cu ft sealed. Wired it for 2+2ohm in series for 4ohm load as shown here. I am not a speaker builder, this was a gamble and learning experience since my enclosure is only .6cu ft. When i received the driver it was 1/2" deeper than the original but still fit. When installed i started turning up the volume with a 60hz sine wave it began to make a slapping sound at around 1/8 volume. This didnt happen when I had the driver out of the enclosure so is it safe to attribute that defect to the 25% less volume? The current enclosure is 9x11x11" and the new enclosure i calculated at 10x12x12 will get me to .8cu ft.
No.
The Ultimax II driver is rated for a 20mm Xmax, 40mm (over 1.5") peak to peak.
It shouldn't make any "slapping sound" until well past that excursion, regardless of the enclosure size.
The smaller volume will require more amplifier power/voltage to achieve that excursion at lower frequencies.
The small volume of the enclosure will raise the driver's Fs of 39Hz to an Fc ~60Hz, impedance rising to ~20 ohms, compared to ~7 ohms free air.
The amp probably does not produce much output into such a high impedance, 500 watts at 5.7ohms requires around 53volts, only 142 watts into 20 ohms.
The Ultimax II's Fs is probably much higher than the Sunfire SF-10-CW, so expect the built in EQ won't result in similar frequency response.
The amp's input or output (or the sine wave generator) may be clipping regardless of the input level setting, which appears to have a range from "MIN", (probably off) to "0dB" (no gain over line level) to "+15dB".
Hard clipping can sound like "slapping".
"Around 1/8 volume" could be -40dB less gain than "0".
If the crossover was set at 65 Hz ("normal") or below, it will require more input level to achieve it's maximum output at 60Hz.
At any rate, try setting the input to "0" (no gain, no reduction), crossover to "bypass", sweep up and down while slowly advancing the input level to determine whether the "slapping sound" is amp clipping or driver/cabinet related.
Sine waves can burn voice coils quickly, don't spend too much time in the sweeps, allow cooling between tests.
@weltersys appreciate the info. i used your bypass settings and they proved successful on the sine wave bench test.
If i did create a new box with more proper dimensions, would the metrics on impedance and power requirements using 10x12x12 enclosure be more ideal for the amp?
If i did create a new box with more proper dimensions, would the metrics on impedance and power requirements using 10x12x12 enclosure be more ideal for the amp?