mrazandrewm Posted December 4, 2014 Report Share Posted December 4, 2014 Hey guys. I'm trying to figure out what kind of Passive Radiator to get for a SA8V2 running around 600-700 RMS. I just emailed psi asking if they would make a custom 8" PR for my application because I have a 2013 F150 SuperCab and have hardly any room to fit a decent 10" PR under it (even with the lmi seat lift kit). I was looking at PRs on partsexpress and saw this PR. Would two of those PRs work for the subwoofer listed above? Or would the subwoofer rip those to shreds if I were to use two? Thanks. Vehicle: 2013 Ford F-150 STX SuperCab 5.0L V8 4x4 BIG 3: Knukonceptz Kolossus Fleks 0 Gauge OFC Power Amp Kit Headunit: Stock (Leaving factory look) Speakers: Stock Subwoofer: Incriminator Audio Lethal Injection 10" D2 wired down to 1 ohm Enclosure: ~1.5 cubic feet tuned to ~34 Hz (Port Area ~24 inches) Amplifier(s): Sundown Audio SAE1000.1D Amp Power Kit: Knukonceptz Complete 4 Gauge OFC Amplifier Installation Kit Link to comment Share on other sites More sharing options...
SIDE SHOW Posted December 4, 2014 Report Share Posted December 4, 2014 jus go ported Link to comment Share on other sites More sharing options...
mrazandrewm Posted December 4, 2014 Author Report Share Posted December 4, 2014 Don't have the room to get to the tuning frequency I want. Lol. Vehicle: 2013 Ford F-150 STX SuperCab 5.0L V8 4x4 BIG 3: Knukonceptz Kolossus Fleks 0 Gauge OFC Power Amp Kit Headunit: Stock (Leaving factory look) Speakers: Stock Subwoofer: Incriminator Audio Lethal Injection 10" D2 wired down to 1 ohm Enclosure: ~1.5 cubic feet tuned to ~34 Hz (Port Area ~24 inches) Amplifier(s): Sundown Audio SAE1000.1D Amp Power Kit: Knukonceptz Complete 4 Gauge OFC Amplifier Installation Kit Link to comment Share on other sites More sharing options...
hispls Posted December 4, 2014 Report Share Posted December 4, 2014 You ideally will have 50% more displacement from your passive, so ideally a single 10" PR or dual 8" PR's would be appropriate for a single 8" active driver unless you planned to run rather low power. Link to comment Share on other sites More sharing options...
SIDE SHOW Posted December 4, 2014 Report Share Posted December 4, 2014 ported 6.5" then? Link to comment Share on other sites More sharing options...
TaylorFade Posted December 4, 2014 Report Share Posted December 4, 2014 It's not JUST about cone area. It's about displacement. You need at least 1.5x the displacement. Meaning xmax * cone area. Those little PR's have 9mm xmax. The Sa8 has 19mm one way. You'd still be short with those. Find beefier PR's Link to comment Share on other sites More sharing options...
mrazandrewm Posted December 4, 2014 Author Report Share Posted December 4, 2014 The SA8V2 has an xmax of only 16mm one way. I don't recall what the cone area of the SA8V2 is. But I do know that the PR I posted (if I got 2) will have a total of 350 displaced (each have a sd of 194 sq cm and a xmax of 9mm one way). I did contact PSIcaraudio to see if they are willing to build a single 8 inch PR for this project. Vehicle: 2013 Ford F-150 STX SuperCab 5.0L V8 4x4 BIG 3: Knukonceptz Kolossus Fleks 0 Gauge OFC Power Amp Kit Headunit: Stock (Leaving factory look) Speakers: Stock Subwoofer: Incriminator Audio Lethal Injection 10" D2 wired down to 1 ohm Enclosure: ~1.5 cubic feet tuned to ~34 Hz (Port Area ~24 inches) Amplifier(s): Sundown Audio SAE1000.1D Amp Power Kit: Knukonceptz Complete 4 Gauge OFC Amplifier Installation Kit Link to comment Share on other sites More sharing options...
Dangrebel Posted December 4, 2014 Report Share Posted December 4, 2014 IM currently using some passive setups. Do not use just 1 8in passive. You need 2 or a 10. You will quickly run out of excursion on just a single 8 inch passive. I'm using a 10 with a 12inch passive and I really need about 1 more passive on the lower end. When you get it tuned right man they sound good. Very flat sounding 1999 GMC Yukon, 6 PSI platform 5 18's, 4th order bandpass by BHE, Taramps, Link to comment Share on other sites More sharing options...
mrazandrewm Posted December 4, 2014 Author Report Share Posted December 4, 2014 Dangrebel. I was also looking at the new PSI-8" subwoofer, would a single 10" PR and the PSI-8" work well in a 0.6 cubic ft enclosure tuned around 32 Hz (on the PR)? Also, what websites would you recommend looking at toe read up about Passive Radiators? Thanks. Vehicle: 2013 Ford F-150 STX SuperCab 5.0L V8 4x4 BIG 3: Knukonceptz Kolossus Fleks 0 Gauge OFC Power Amp Kit Headunit: Stock (Leaving factory look) Speakers: Stock Subwoofer: Incriminator Audio Lethal Injection 10" D2 wired down to 1 ohm Enclosure: ~1.5 cubic feet tuned to ~34 Hz (Port Area ~24 inches) Amplifier(s): Sundown Audio SAE1000.1D Amp Power Kit: Knukonceptz Complete 4 Gauge OFC Amplifier Installation Kit Link to comment Share on other sites More sharing options...
Dangrebel Posted December 4, 2014 Report Share Posted December 4, 2014 Depending on how much power your planning to run, yes that sounds like a good box size for the 8 shrink it if your running more than rms. yea you'll like it the only thing is change is the tuning. You'll find it to be louder around 35-38 he tuning because the cone area is so small on a 8 they have trouble hammering the lows while still having high output 1999 GMC Yukon, 6 PSI platform 5 18's, 4th order bandpass by BHE, Taramps, Link to comment Share on other sites More sharing options...
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