Worth the upgrade from single JL 10w3v3 to dual SD X8v2?

kmu

CarAudio.com Elite
Jun 25, 2002
653
2
Tucson, Az...
Ive been debating for a long time on which 8" set up to go with to upgrade from my JL 10w3v3 set up, need some suggestions if its worth it and if Im going to notice any difference in output.

Current system: 750 rms to a single JL 10w3v3 in a JL ported box (seems on the small side, don't know what its tuned to)

Upgrade to: 1,350 rms to a dual Sundown Audio x8v2 (ported tuned low and I can go as big as needed to get the best output possible)

Would I notice any low end improvement specially in the 30 hz to 40 hz area? how would the sound quality be with the sundowns compared to the JL?

Im looking for a much better output in the low frequency area while still maintaining the wow factor by using small diameter subs.

THX

 

kmu

CarAudio.com Elite
Jun 25, 2002
653
2
Tucson, Az...
What vehicle and what amp? There should be an increase since you are doubling power and increasing cone area by 20%.
Honestly I would just run a single 12 instead of the 8s.
Jeep Grand Cherokee 2015

amps are NVX 750.1 and NVX 1200.1

 

THATpurpleKUSH

Smoke weed everyday
Sep 30, 2009
7,140
406
Banging gears and passing queeers
Jeep Grand Cherokee 2015
amps are NVX 750.1 and NVX 1200.1
The sundown 8s are not very efficient and will be lucky to get 1/3 to 1/2 their rated power after impedance rise. They are very stiff and have a high free air resonance. I would look at something with a lower fs, lighter weight moving mass and a softer more compliant suspension that doesn't need a lot of power to reach its full potential.

 

Louisiana_CRX

dem shoes......
Aug 22, 2006
38,722
225
Piney Hills of Louisiana
Ive been debating for a long time on which 8" set up to go with to upgrade from my JL 10w3v3 set up, need some suggestions if its worth it and if Im going to notice any difference in output.
Current system: 750 rms to a single JL 10w3v3 in a JL ported box (seems on the small side, don't know what its tuned to)

Upgrade to: 1,350 rms to a dual Sundown Audio x8v2 (ported tuned low and I can go as big as needed to get the best output possible)

Would I notice any low end improvement specially in the 30 hz to 40 hz area? how would the sound quality be with the sundowns compared to the JL?

Im looking for a much better output in the low frequency area while still maintaining the wow factor by using small diameter subs.

THX
If setup right it should be very impressive

 

kmu

CarAudio.com Elite
Jun 25, 2002
653
2
Tucson, Az...
The sundown 8s are not very efficient and will be lucky to get 1/3 to 1/2 their rated power after impedance rise. They are very stiff and have a high free air resonance. I would look at something with a lower fs, lighter weight moving mass and a softer more compliant suspension that doesn't need a lot of power to reach its full potential.
One of my local dealers is giving me a good price on 4 JL 8w3v3s, but wanted to look for something different, those should work good on 1,350 watts rms

 

BOOMINGRANDPA

CHEAP A/F
Jan 8, 2017
7,077
19
NC
by set up right you men with a good designed box? any suggestions?
i take it u trying for small box? cause if u have room 1 12 sa or other similar sub like mine even with a 2-2.5cf ad box on the bigger amp would solve deeper bass problem real fast and be cheaper and louder than jl's

 

kmu

CarAudio.com Elite
Jun 25, 2002
653
2
Tucson, Az...
i take it u trying for small box? cause if u have room 1 12 sa or other similar sub like mine even with a 2-2.5cf ad box on the bigger amp would solve deeper bass problem real fast and be cheaper and louder than jl's
The box can be up to 4 cf gross, the reason I was leaning into 8" woofers was just because it would fit just right (height wise for the box) and wanted to do 8" subs...

 

THATpurpleKUSH

Smoke weed everyday
Sep 30, 2009
7,140
406
Banging gears and passing queeers
One of my local dealers is giving me a good price on 4 JL 8w3v3s, but wanted to look for something different, those should work good on 1,350 watts rms
Whatever subs you choose to run they won't be getting 1350rms, it will be more like ~600watts because impedance rise fluctuates but is usually around 3-4x what the nominal is. The 8w3's are more efficient and have a lower fs, I would take those over the X8's if lows are concerned. 4 8's are roughly 14% more cone area than a single 15.

 

BOOMINGRANDPA

CHEAP A/F
Jan 8, 2017
7,077
19
NC
The box can be up to 4 cf gross, the reason I was leaning into 8" woofers was just because it would fit just right (height wise for the box) and wanted to do 8" subs...
if u like 8's do that but i wouldn't do the x like he just said after rise u get like 1/2 power u send to subs.. so get something more efficient don't have to be jl.. look at sa or even the e other companies too but well 1 12 is pretty easy to do (and to fit in your suv) and would be pretty loud at 1200+ in 2.5cf ad box (again maybe not something so "heavy" it needs 2k) u should hear my fu on 900rms in 2.1cfad.. if u could do a 15 3.5cfad the bigger amp i'm sure u would be be happy with the lows..

 

kmu

CarAudio.com Elite
Jun 25, 2002
653
2
Tucson, Az...
So going by everyones suggestions it would be better to get a pair of SA8v3 instead of the Xs?

I already got the NVX1200.1 amp, but I could alwas upgrade in the future if my truck could handle the amp upgrade without doing much upgrades on the electrical system besides the big 3

Thx again for all the suggestions

 

kmu

CarAudio.com Elite
Jun 25, 2002
653
2
Tucson, Az...
I decided to do a quick search for 8" subs with low Fs and found the Dayton Ultimax to have one of the lowest Fs out of most 8" subs with 31.6 Hz, the Daytons handle 300 rms and require a .75 cf net enclosure tuned to 30 hz

What do you guys think of them? with 3 of them in dual 2ohm voice coils I would be getting a 1.3 ohm load and probably be giving each sub about 300 rms

 

BOOMINGRANDPA

CHEAP A/F
Jan 8, 2017
7,077
19
NC
I decided to do a quick search for 8" subs with low Fs and found the Dayton Ultimax to have one of the lowest Fs out of most 8" subs with 31.6 Hz, the Daytons handle 300 rms and require a .75 cf net enclosure tuned to 30 hz
What do you guys think of them? with 3 of them in dual 2ohm voice coils I would be getting a 1.3 ohm load and probably be giving each sub about 300 rms
most peeps here like daytons they get recommended all the time.. idk about over the sundowns though..

 

kr15

Polluting Residentials
Feb 17, 2010
6,702
55
California
The daytons will sound really good.

The sa8s will also sound good, and have excellent output

 

kmu

CarAudio.com Elite
Jun 25, 2002
653
2
Tucson, Az...
The daytons will sound really good.
The sa8s will also sound good, and have excellent output
The amp I will be using was dynoed at 1,037 watts rms at 2 ohms and 1,383 watts rms at 1 ohm

With impedance rise I could do something like

3 Dayton ultimax getting around 300 rms each for a total of around 900 watts rms at 1.3 ohms

or

2 SA8v2 with around 500 rms each for a total of 1,000 watts at 1 ohm