Leaderboard

A long time ago, there were no subsonic filters. We punished woofers way back without them and they weren't built as stout as they are now. Use your ears and you'll be fine.

If you dont like that idea than consider swapping amps and using the other. 550 vs 800 watts is about 1.5dB. I dont think you would hear a difference. typically you set the hpf about 1/2 octave below the port tuning. So 15/2 = 8, HPF around 22hz. here is the HU manual. screen shot is from page 15 http://vault.alpine-usa.com/products/documents/OM_CDA-9887.PDF

Your headunit has a HPF that is variable from 20-200 hz, however you will have to swap the output to the front or rear pre amp ouputs on the HU. https://imgur.com/0EKbDr6

Well, almost 4 years later and I'm finally going to build the ported box for the ICON! I'm using the pre-designed enclosure plans from the SSA site (2.5ft^3 @ 30 Hz) and am waiting for the MDF to be delivered. It's going to be in the same vehicle (JDM 2000 Subaru Legacy GT Wagon Twin Turbo, stock alternator (100A), Bosch Hightec Premium AGM batt, big 3 (1/0), Alpine CDA-9887, and Kicker Impulse i525 coaxials). My question is: my current amp is a MMATS HiFi 4250 and it doesn't have a SSF. The ICON will be wired to 4 ohms and will see ~800W. I've read numerous threads and articles on SSFs and there hasn't been a definitive "yes" or "no" if it's needed or not. Some say for smaller subs (8") it is and others say for lower tuned enclosures (20-30Hz) it's not. Will powering the ICON (rated for 950W RMS), tuned at 30Hz, without a SSF be an issue with the given power? I listen to all genres of music but mainly old school rap, dubstep, and rock. My other option would be to power it with my SSA IC150.4 on Ch3/4 bridged (~550W @4 ohms) since that has a SSF. Previously, I had that amp powering it in the 1.1ft^3 sealed box but didn't sound like it was giving it enough power. Will ~550W be enough power in a ported enclosure? I appreciate all the assistance. Thanks!