Cabin Gain?

[fish1234 10+ year member]

Can someone explain this. I have a suv and would like to know/understand how I can compensate for it. The vehicle is a 2004 Honda Pilot EX. Getting ready to do a new sub set up with a custom ported enclosure. Sub choices I like are: SA-8, SA-10.

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[Kangaroux 5,000+ posts]

Are you competing or is this for daily use? Deadening is a good start as it adds mass to the metal panels in the vehicle and thus lowers their resonance. Tuning lower will usually help flatten out the response. If you have an equalizer you can cut around where your peak is and it should help flatten it

 

[fish1234 10+ year member]

Daily use. I'm getting ready to order some AT 60 mil, lookin forward to using his product for the first time....good stuff? What do you think for subs the 8's or 10's. I really like a solid bass, listen to a lot of heavy rock/classic rock music.

 

[Joseph7195 10+ year member]

After you get the deadener installed, it's really pretty easy to check the resonant frequency inside your Pilot. It's normally not that expensive either. I think I went to a shop and it was $20 bucks. And it made designing the system so much easier since one of my variables had been solved. I hope all is good bro!

 

[fish1234 10+ year member]

How do they test for resonant frequency?

 

[i2ain2thunder 10+ year member]

Compensate? I wish I had that much cabin space...trunks & cars FTL. Anyway I would go with 2 solid sa-12s.

 

[fish1234 10+ year member]

Power for the subs are coming from an Arc 900.6 amp. Bridged power @ 4 ohms is 550 WRMS for sub channel.

 

[nateberrier 10+ year member]

I personally love the sa 8s and when i think cabin gain I think rolling down the windows to gain dbs. I could be wrong. If thats the case then a smaller sub will eliminate that. If youre worried about resonating then its deadener. I have over powered and under powered sa 8s in all sorts of enclosures and never been upset with them. Sound really good. Im sure the sa 10 is similar but never had one. just 8s and 12s

 

[fish1234 10+ year member]

Was wanting to try a single 8 or 10. Always see/hear some amazing things about the 8's. Are they power hungry subs? Can I feed one all of the rated power of this amp to the one 8 or would two be better?

 

[Joseph7195 10+ year member]

It's pretty simple to check. The shop will get a sub in it's optimum sealed enclosure(which you should ask if the enclosure is made to produce the flattest response possible for the sub) and sit it in the rear seats usually powered by a small amp (located in the shop somewhere, don't use yours, just to rule out the chance of an improperly set amp). They will play a couple of test tone sweeps, and maybe move the box to one side of the vehicle or another, and even maybe the center, and take the SPL readings at all tones. The spike in SPL at the observed tone is your resonant frequency! It sounds like a lot, but it only takes about 20 or 30 minutes at the most.

 

[nateberrier 10+ year member]

Was wanting to try a single 8 or 10. Always see/hear some amazing things about the 8's. Are they power hungry subs? Can I feed one all of the rated power of this amp to the one 8 or would two be better?

Two is always better, But I was feeding them 700each and never had any issues.

 

[groundpound4200 5,000+ posts]

I peak around 38 hz in my Pilot regardless of where I'm tuned.

 

[fish1234 10+ year member]

Once I find out the "spike" should I base my build/enclosure around this tone?

 

[groundpound4200 5,000+ posts]

I would just tune in the low 30s and call it a day if you want it to play flat.

 

[Joseph7195 10+ year member]

That's a toughie. When I was competing in SPL comps, I used that frequency in order to get the highest pressure inside the cabin of my truck. I got lucky and my resonant frequency was 52 Hz, so it was high, which is better for my application in SPL. If you are building for SQ, it's a totally different beast. You can EQ the peak out with some sort of processor or you can build an enclosure which complements your goals. Which is where a properly built and tuned Bandpass box can be helpful at achieving SPL and SQ. But they are hell to build and I have yet to hear one I like. But when it comes down to it, the speaker itself will have qualities which will determine the optimum enclosure, and variations of that enclosure will be the other variables that will determine sizes and tuning.