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View Full Version : 4x SA-8s + The CRX = More Fun



sundownz
04-29-2010, 06:08 PM
So Derrick came up today and constructed a box for me for my four SA-8s... still two 1500Ds on one Stinger SPP-1500D and one Stinger SPV-70 battery on Powermaster Charger (car off).

We built the box from scrap 5-layer pine plywood for testing... we plan to use birch ply for another version at a later date.

Results here :

http://www.sundownaudio.com/misc/90_CRX/4xSA-8/CIMG3723.JPG

http://www.sundownaudio.com/misc/90_CRX/4xSA-8/CIMG3724.JPG

http://www.sundownaudio.com/misc/90_CRX/4xSA-8/CIMG3722.JPG

FurbiesAndBeans
04-29-2010, 06:09 PM
so double the cone area got you up around 2 dbs?

O.G. D-Wet
04-29-2010, 06:12 PM
cwazy wittle eights!

sundownz
04-29-2010, 06:12 PM
1.6 dB gain - yep.

dasinde91
04-29-2010, 07:29 PM
That is AWSOME...

stevew007
04-29-2010, 07:30 PM
dbdrag or outlaw?

bhsdriller
04-29-2010, 07:33 PM
db drag, sealed on the dash

I think

sundownz
04-29-2010, 07:55 PM
Yah, sealed on the dash. Don't know what it does Outlaw.

O.G. D-Wet
04-29-2010, 08:00 PM
those are some of the sexiest lookin subs

sundownz
04-29-2010, 08:06 PM
"Outlaw" in the kick with door open -- still at 57 Hz same frequency as dash... decided to test since someone asked.

http://www.sundownaudio.com/misc/90_CRX/4xSA-8/CIMG3726.JPG

http://www.sundownaudio.com/misc/90_CRX/4xSA-8/CIMG3725.JPG

britdevine
04-29-2010, 08:13 PM
What deck are you using in the CRX? Does it skip ever? Is there a changer?

sundownz
04-29-2010, 08:16 PM
It's a Kenwood deck from best buy -- actually using my iPod now but I never had it skip on a CD doing low 150s when I was using a CD.

dasinde91
04-29-2010, 09:41 PM
It's a Kenwood deck from best buy -- actually using my iPod now but I never had it skip on a CD doing low 150s when I was using a CD.

So Jacob you were louder using the Ipod instead of the bass tone from the db jamz cd?

Blasphemy
04-29-2010, 09:48 PM
Nice score you got there.

sundownz
04-29-2010, 11:35 PM
So Jacob you were louder using the Ipod instead of the bass tone from the db jamz cd?

I didn't test directly - just prefer the iPod so I don't have to carry any CDs.

12voltz+-
04-30-2010, 12:15 AM
whats the peak ? 68hz it looks like?

justin smith
04-30-2010, 01:01 AM
do you think they could take more power?

amartin_72
04-30-2010, 01:02 AM
nice port

amartin_72
04-30-2010, 01:05 AM
THey are stronger with packaging tape wrapped very tightly. You can wrap them tightly by putting one end down on the floor, placing the other end on top, pushing down on them with your chest and pulling the tape around real tight.

roarzorz
04-30-2010, 08:45 AM
whats the peak ? 68hz it looks like?

57hz

roarzorz
04-30-2010, 08:46 AM
do you think they could take more power?

Yes for burps only.

Johnny Law.Lulz
04-30-2010, 09:08 AM
THey are stronger with packaging tape wrapped very tightly. You can wrap them tightly by putting one end down on the floor, placing the other end on top, pushing down on them with your chest and pulling the tape around real tight.

lulz What ?

nateberrier
04-30-2010, 09:12 AM
ipod/cd doesnt matter if you have a high bitrate song 320 or better that is. you could say it does but 99.9% wont know the difference. Now if youre coming from an aux port dont expect magic.

my brother has butt gasms over these 8s. Im pretty sure his dorm is covered in them awaiting recones along with some E8s but this is why lol. Two db gain is pretty sick. As small as those guys are you could probably run 8-12 in the crx pretty easy

Johnny Law.Lulz
04-30-2010, 09:19 AM
I might do a wall of these in the diesel.

sundownz
04-30-2010, 09:20 AM
Derrick is correct - my car peaks at 57 hz. Many other CRXs peak in the mid to high 60s - but mine does not... likely due to the sunroof.

---

amartin,

Indeed - port works great! I had it much tighter but we changed the length 3-4 times in the car :)

---

nate,

I've never seen any SPL difference in prior testing so I've never worried about it. I am using 320k MP3s, though.

soundstreamer
04-30-2010, 11:03 AM
Nice numbers! My rex with a sunroof peaks @ 65hz. I've heard mostly peak anywhere from 55 - 65hz, but my friends DX peaked @ 70hz. I guess it's pot luck as to what your rex does it's best at...

Louisiana_CRX
04-30-2010, 11:30 AM
Nice numbers! My rex with a sunroof peaks @ 65hz. I've heard mostly peak anywhere from 55 - 65hz, but my friends DX peaked @ 70hz. I guess it's pot luck as to what your rex does it's best at...

mines a DX....;)

Louisiana_CRX
04-30-2010, 11:30 AM
nice run on the 8's....

Mookie
04-30-2010, 11:41 AM
Crazy score. Good job.

teen
04-30-2010, 12:42 PM
who needs 15s anymore....

DBDRAGGUY
04-30-2010, 12:55 PM
[QUOTE=sundownz;7079744]Derrick is correct - my car peaks at 57 hz. Many other CRXs peak in the mid to high 60s - but mine does not... likely due to the sunroof.

Your note will go up once the car is deadened and becomes more reflective. Covering the large holes in the back of the car and the holes in the doors will do wonders for your score. Deadening the roof is a nice gain as well.

sundownz
04-30-2010, 03:57 PM
152.7 a minute ago with four 1500s installed... working on getting it tuned a bit better to see what it maxes out at.

Trying for ~153 and I'll be pleased.

Raised impedance on amps from 0.25 each to 0.5 each so real power gain on a burp is not enormous but should give it a good nudge :)

sundownz
04-30-2010, 04:46 PM
Setup with four 1500s (very messy... 10 lbs of stuff in a 5 lb bag, LoL) -- two amps under rack and two on top.

http://www.sundownaudio.com/misc/90_CRX/4xSA-8/CIMG3728.JPG

http://www.sundownaudio.com/misc/90_CRX/4xSA-8/CIMG3729.JPG

http://www.sundownaudio.com/misc/90_CRX/4xSA-8/CIMG3730.JPG

http://www.sundownaudio.com/misc/90_CRX/4xSA-8/CIMG3727.JPG

If the four amps end up staying I will order some matching wire and get it looking a bit nicer... wired it up with scrap wire to see if it would work well or not.

sundownz
04-30-2010, 04:56 PM
YES! Hit my goal :) Went up one more click on sub control on the HU... this is probably all they have excursion wise.

Have plans to try different boxes at some point as well.

http://www.sundownaudio.com/misc/90_CRX/4xSA-8/CIMG3731.JPG

O.G. D-Wet
04-30-2010, 05:05 PM
YES! Hit my goal :) Went up one more click on sub control on the HU... this is probably all they have excursion wise.

Have plans to try different boxes at some point as well.

http://www.sundownaudio.com/misc/90_CRX/4xSA-8/CIMG3731.JPG

$HITFUk!!!

amartin_72
04-30-2010, 10:12 PM
who needs 15s anymore....

Whoever doesnt like 57hz

dasinde91
05-03-2010, 01:07 AM
wow this is awwwwwwwwsome.......

peterwiener
05-03-2010, 02:54 AM
quite impressive i must say. nice job.

sundownz
05-03-2010, 09:32 AM
Brought it out in Macon, GA to a 3x dB Drag / 2x IASCA event over the weekend. Heat threw me off a bit but still did pretty well :

152.1 dB Drag SSNW
153.3 IASCA Pro Stock 1

CranberryYumYum
05-03-2010, 04:33 PM
Brought it out in Macon, GA to a 3x dB Drag / 2x IASCA event over the weekend. Heat threw me off a bit but still did pretty well :

152.1 dB Drag SSNW
153.3 IASCA Pro Stock 1

baaadass

:)

on1wheel01
05-03-2010, 04:55 PM
nice. Do u guys ever do shop tours or anything like that. Im down in mooresville would be kick *** to come check out the place.

stevew007
05-03-2010, 05:15 PM
Brought it out in Macon, GA to a 3x dB Drag / 2x IASCA event over the weekend. Heat threw me off a bit but still did pretty well :

152.1 dB Drag SSNW
153.3 IASCA Pro Stock 1

lets see 2 8's and 3k each ;)
you better bring up those numbers in SSNW LOL great job

sundownz
05-03-2010, 05:27 PM
lets see 2 8's and 3k each ;)
you better bring up those numbers in SSNW LOL great job

I'm not really "seriously" competing in SSNW with the CRX -- but my Jeep is kind messed up at the moment.

sundownz
05-03-2010, 05:27 PM
Did a quick power clamp.

4240 clamped watts = 152.8 dB
1300 clamped watts = 148.7 dB

stevew007
05-03-2010, 05:39 PM
I'm not really "seriously" competing in SSNW with the CRX -- but my Jeep is kind messed up at the moment.

yeah it was a joke man I didnt think you would

mbrooky
05-03-2010, 05:46 PM
new outlaw score with the 4 1500s??

sundownz
05-03-2010, 06:05 PM
I have it all pulled out now after the clamp test. Going to change it up a bit before putting back in... will do an Outlaw then.

roarzorz
05-03-2010, 07:45 PM
I guess it's time to try out some different boxes. I'll be up there Thursday or Friday.

stevew007
05-03-2010, 08:36 PM
I have it all pulled out now after the clamp test. Going to change it up a bit before putting back in... will do an Outlaw then.

both of my crxs loved woofers up.the last crx had 4 busted konaki 12's and about 8k in a 26x26x14 box seperated with 2 6" areos it did 156.5 drag style.

sundownz
05-17-2010, 11:40 AM
Little more clamping:

2110 watts = 150.8 dB on the dash
2080 watts = 153.0 dB in the kick

Still the same box as before with four 8s.

When Derrick comes back we may try a two subs up / two subs forward style box.