Advice on 12" sub for nice budget system

chodecz · Post by **chodecz** » Thu May 11, 2006 3:53 pm

Hi guys,

I'm thinking of doing a nice budget setup for a friend.

I just wanna do one 4-ch amp, 2ch for comps, 2 bridged mono for 1 sub.

I was looking at Kicker kx600.4(a) or sx700.4(b).

Comps, i'm thinking Infinity Kappa Perfects, so they'll be getting 75wrms(a) or 82wrms(b).

For the sub, thats what i'm unsure on. I like the RE SE 12", but its dual 4ohm so its a no-no (dont want 2).

Power to the sub will be either 300wrms(a) or 325wrms(b).

I need a dual 2ohm sub, and 12" size.

I will prob go with option (a), as (b) will be too much $$$.

Any suggestion on a dual 2ohm, 12", achievable optimal output at around 300wrms (gonna make suitable ported box), great SPL (but gd quality also) sub!???

Any advice much appreciated.

ridr4lif · Post by **ridr4lif** » Thu May 11, 2006 3:57 pm

Kappa perfect would be a pretty good choice for comps.

As for a sub, check out Diamone audio. Here's a link to one:
http://www.woofersetc.com/index.cfm?fus ... ct_ID=2841

Its 400 rms, but im sure in ported it could get loud w. only 300.

Another good choice is the JL Audio W3V2:
http://www.woofersetc.com/index.cfm?fus ... ct_ID=2062

Could also look into a 3 channel amp. I dno about the kicker kx550.3, but it MIGHT be stable to 2 ohm on the woofer channel. Worth lookin at.

NViejeP · Post by **NViejeP** » Thu May 11, 2006 6:35 pm

The Kicker KX550.3 is stable to 2 ohm on the woofer channel. I'm getting a dual 4 ohm RE SE and hooking it up to my Kicker KX550.3 soon.

chodecz · Post by **chodecz** » Fri May 12, 2006 2:12 am

Yeah just looked at the kx500.3 - the 400wrms @ 2ohms for the sub is cool, but only 2x40wrms for the comps isnt enough

, maybe if I get 2ohm comps???? then it'll be 75wrms

Does anyone know of comps within the same performance and price range as the Infinity Kappa Perfects????

Robert Wollenberg · Post by **Robert Wollenberg** » Fri May 12, 2006 2:26 am

chodecz wrote:only 2x40wrms for the comps isnt enough

Why isn't 40 wrms enough?

NViejeP · Post by **NViejeP** » Fri May 12, 2006 7:27 am

It is mroe of like 60 Watts RMS. Assuming that your car is in between those voltage ratings. I went with JL XR650CSi, but they are like $300 components. Maybe go with some CDT CL-61A, I've heard some godo things.

RMS Power Ratings:
14.4V:
70 watts x 2 chan. @ 4 ohms
85 watts x 2 chan. @ 2 ohms
Sub Power:
210 watts x 1 chan. @ 4 ohms
420 watts x 1 chan. @ 2 ohms
12.5V:
40 watts x 2 chan. @ 4 ohms
70 watts x 2 chan. @ 2 ohms
Sub Power:
180 watts x 1 chan. @ 4 ohms
360 watts x 1 chan. @ 2 ohms

solacedagony · Post by **solacedagony** » Fri May 12, 2006 8:29 am

You audibly probably wouldn't a whole lot of notice the difference between 40W and 60 or 70W, but I would personally get an amp with headroom myself, just cause it makes me get that tingly feeling in my belly :)

Robert Wollenberg · Post by **Robert Wollenberg** » Fri May 12, 2006 8:33 am

The difference between 40 wrms and 60 wrms is roughly 2 db.

Also, I'm pretty sure headroom isn't associated with how many watts an amp produces. An amp either has it or not and you either chose to use it or not by setting your gains properly.

chodecz · Post by **chodecz** » Fri May 12, 2006 5:34 pm

So you think just over 40wrms will be fine for my Infinity Kappa Perfect (100wrms)????

ridr4lif · Post by **ridr4lif** » Fri May 12, 2006 5:43 pm

Well...that amp puts out 40 rms at 12.5 volts. Thats your battery voltage when the car is off. Once your car is running it will be around 13.8-14.4.

SO, they would receive more like 60-70 watts. They should be fine w. that.