I've been doing a bit of looking around, and listening to a few different subs and I have really noticed that almost all 12's and some 15's hit much faster then my 15" kicker cvr's do. I don't mind rumble, but when rumble takes over punch It gets kinda boring and I think you lose some SQ when listening to music with a faster harder rythem (dance trance ect). Now I have two quick questions. For sound quality, is using two of the same subs in a setup better then one? Would I notice a difference in quality if I were to get a really good single sub (such as a w12gti) and box (sealed)? Would using a crossover or some kind of unit to help tighten the subs up a bit chance? The box they are currently in is sealed. Thank you!

 

From what I've heard from various people, the amplifier often plays a bigger role in the sound of the sub then the type of sub does. What I mean is, if you were to match your sub up with a "better" amp, you might have a woofer that is more controlled. I have no idea what you're using for an amp, but I'm just throwing that out there.

Does your current amplifier have a sub-sonic filter? This can help to clean up the sound the woofer is producing by reducing the really low frequencies.

Good sounding bass is such a subjective thing. What sounds good to you, may sound like crap to someone else. Personally, one 15" sub would be more than enough bass for me. You should be able to get plenty of bass with one 12" sub. If you're not competing I don't know why any one would need more than that. Just my opinion.

I think the only crossover you'd need would be the Low Pass Filter built into your amplifier. Perhaps an amp with a steep slope (24dB/Octave) would help to keep the sub sounding tighter. Again, I don't know what your amp is capable of. What are you using, anyway?

 

I'm using a kenwood KAC9152D. It's rated for 900WRMS at both 1 and 2 ohms, has 2x30 amp fuses.

Seems to have some real quick specs on this page here.

Kenwood KAC-9152D

 

the CVR'a have heavy cones and specially the 15's are tough to get good response out of. The amp is pretty decent, it plays a small factor in the performance, but the biggest player in sound characteristics for a sub is the box. If you hav a pair of 15's now and don't mind going more for quality at the sacrific of some output a 12" GTi in a ported box tuned around 32Hz would sound really solid and stil have great output.

Sound quality Comp VR's is tough, way too much moving mass.

 

Well after doing the math I don't see how you will ever get 900 watts out of that amp at any ohm load. 60A x 14.4V = 864watts. Even if it is 90% efficient you are only going to get at MOST 777.6watts, not too bad considering. Didn't think Kenwood would overrate their amps. Just D/Ld the owners manual for it and they say its usable range is 12-16V. So I just ran the #'s again and at 16V x 60A= 960w x 95%efficient = 912watts. So if you run it at 16V you might get close to 900w but I doubt it will last long. LOL If my math is wrong let me know. I hate being wrong.
I would say try the sub you have now in a ported box tuned at around 35-36hz and it might help with the rumble. In a sealed box there is nothing to limit the really low frequencies from getting played. In a ported box with a higher tuning the box will limit the lower stuff and should remove some of the rumble. I know I have 2 tens in a sealed box and they go very low and rumble quite well.
HTH
Nick

 

sorry I thought this was a thread on when is "2 better than one" and my answer was boobies!

 

 

I cannot agree more about the CVR's been tough to attain SQ.

But, if you ever wanna get super loud, throw those CRV's in a 6.5 cube ported enclosure @ 33hz and prepare for some lows

 

^^^ this guy seems to know his boxes. I would do whatever he suggests.
jalat just sent you a PM on ROE

 

Despite your math looking correct to the tee, I still love this amp to death. I ran it at half an ohm for 7 months straight. Bumpin it hard to the point my lights dimmed all the time (except for whem my lights weren't on, the lights took a lot of juice and with the system the voltage dropped). Even the kickers still sound the exact same from the day I got them. They are awesome for rap and slower beats, but I'm looking for more. I've really been considering the wgti12 from JBL. I've heard nothing but positive things about them, and getting a new amp to power one of those in a ported box I think might be the best way to go.