PG 12" RSD BOX

soundname · Post by **soundname** » Mon Dec 18, 2006 3:20 pm

I have researched and read many threads off different forums about the PG RSD's. The famous thread which features the RSD in a comparison with other great woofers states that the box was 1.8 cf. I've been e-mailing PG. I think he posts on here??

I am looking for SQL and he said that having a smaller box around 1.2 cf should get louder than the stated 1.8 cf because the woofer is able to take more power in a smaller box.

I am just trying to get more feedback and opinions on how big my box should be if I am going for SQL. I want to be able to get decently loud while maintaining great sound quality.

P.S. Has anyone ported the RSD's?? How did they sound ported?

Thanks guys!

**NEW REFINED QUESTION AT THE BOTTOM, NEED HELP CONCERNING BOX SIZE

Post by **stipud** » Mon Dec 18, 2006 3:25 pm

On the same power, the bigger box will be louder in deep bass.

Post by **bdubs767** » Mon Dec 18, 2006 4:09 pm

like tom said....bigger the lower.

pg tech would be vvw337 and rec. 1.8 and why I used 1.8

Post by **Francious70** » Mon Dec 18, 2006 4:36 pm

1.8 cu ft. will reach full x-Max with 500 watts, so no more or more power is required. That is technically as "loud" as it can get without limiting it's bandwidth (aka, turning the SSF to 35Hz so it dosen't play anything lower than that). If you want louder, add more woofers & power, or go ported.

Post by **bdubs767** » Mon Dec 18, 2006 4:39 pm

Francious70 wrote:1.8 cu ft. will reach full x-Max with 500 watts, so no more or more power is required. That is technically as "loud" as it can get without limiting it's bandwidth (aka, turning the SSF to 35Hz so it dosen't play anything lower than that). If you want louder, add more woofers & power, or go ported.

it can take much more though MUCH...

for a Q of .707 the rsd12d needs a box of something like 5.1 cu ft.

1.8 cu ft gives you a Q of .808 if I remeber right....

soundname · Post by **soundname** » Mon Dec 18, 2006 4:53 pm

The PG tech (Errin) recommended me 1.2 cf per woofer if I wanted more output.

Sorry for asking all the questions, I'm just scared I won't be happy with the amount of output they will put out. That's why I am trying to get the best box size to achieve the best output while sounding great. Now I dont know if I should go seal or ported.

I might go ported since ported is the way to go to get "Louder". Will there be a trade off with the sound quality and the ability to get low??

BTW, it is 2 12" RSD's powered by a hifonics bx1605d.

Post by **AVICJR** » Mon Dec 18, 2006 4:55 pm

If it's related to PG gear and you asked Errin, then what he says you can bet is gold. He has always been dead on accurate.

Post by **Francious70** » Mon Dec 18, 2006 4:58 pm

Well look at it like this, if the box doesn't put out enough, you can always make it bigger.

slc72005 · Post by **slc72005** » Mon Dec 18, 2006 5:09 pm

soundname wrote: I've been e-mailing PG. I think he posts on here??
Thanks guys!

i hope that they pay errin good money at PG because apperantly when people think of PG they think errin

:)

BH · Post by BH » Mon Dec 18, 2006 5:46 pm

soundname wrote:The PG tech (Errin) recommended me 1.2 cf per woofer if I wanted more output.

Sorry for asking all the questions, I'm just scared I won't be happy with the amount of output they will put out. That's why I am trying to get the best box size to achieve the best output while sounding great. Now I dont know if I should go seal or ported.

I might go ported since ported is the way to go to get "Louder". Will there be a trade off with the sound quality and the ability to get low??

BTW, it is 2 12" RSD's powered by a hifonics bx1605d.

Yea you won't be able to get below the port freq w/o ejecting the woofer from the box. Once you go below the port's tuned freq the box looks like free air to the woofer. Yet your excursion will go to near 0 at the ports tuned frequency and you'll get a LOT more volume out of that frequency range. Ported tends to sound a bit slow to me and often lacks punch but its a really good way to get better sound out of an under powered woofer when you're not too worried about getting a lot of punch. This being said a ported box can get pretty punchy and if properly designed can sound VERY good. I've always more appreciated large sealed enclosures for quality sound. But ported is always the way to go if you want loud.

Post by **stipud** » Mon Dec 18, 2006 5:52 pm

I like porting smaller, quicker subs to make up for everything Brett said. My favorites so far was my Ported Xmax 10 setup... it was retardedly loud, punchy, and best of all no delay. I suffered huge delays and lack of punch with my Ti10's though. Strangely enough the Xmax were in the exact same box (but tuned a smidgen higher).

soundname · Post by **soundname** » Mon Dec 18, 2006 6:22 pm

So what do you guys think my best option is if I want SQL and punchy bass that is decently loud?? Sealed or ported? Specs?

Thanks guys, everything is so useful

slc72005 · Post by **slc72005** » Mon Dec 18, 2006 6:27 pm

1 rsd 12 ported in a about 3cf box tuned to high 20hz's very low 30hz's

thats what i got mine in

soundname · Post by **soundname** » Mon Dec 18, 2006 6:30 pm

I already ordered my 2 12"s!!

soundname · Post by **soundname** » Sun Jan 07, 2007 1:10 am

So after a minor setback, I finally found a place where they had RSD12d's in stock and they should be arriving early this coming weak. I want to start building my box A.S.A.P. I think I will be going sealed for the basic reason that my trunk cannot accomodate a ported enclosure for 2 subs.

The only thing halting the build is that I am still uncertain how big each chamber should be.

1. After reading e-mails from Errin, I have summed up this conclusion. According to him:
-The smaller the enclosure (1.2cuft) = the louder the sub can get
-The bigger the enclosure (1.8cuft) = "An audiophile application typically is not setup to be heard by the neighbors"

But then, someone posted this

Francious70 wrote:1.8 cu ft. will reach full x-Max with 500 watts, so no more or more power is required. That is technically as "loud" as it can get without limiting it's bandwidth (aka, turning the SSF to 35Hz so it dosen't play anything lower than that). If you want louder, add more woofers & power, or go ported.

I appreciate the help and info, but each person contradicts the other!!! I know Errin is the guru of PG but both guys seem to know their stuff about enclosures.

Again, I will be running 2 RSD12d's powered by a Hifonics BX1605d(1300-1400w~). I am looking for an SQL setup that gets loud, sounds great, and is packs a punch.

So, how big should each chamber be?? 1.2 cu. ft? 1.8 cu. ft? or maybe inbetween like 1.5 cu. ft?? Please help me!

P.S. Sorry if you guys are tired of my questions. I am just a newbie trying to get the most out of my audio setup. I appreciate all the help I can get.

Post by **bdubs767** » Sun Jan 07, 2007 7:57 am

1.8 will be louder then 1.2

1.8 will decrease the woofers powerhandling because the extra air space will allow for the woofer to meet it's peak excursion sooner then a smaller box. But at 1.8 rsd12 can take up to 1.5k w/o a problem.

DO 1.8 w/ BRACING

soundname · Post by **soundname** » Mon Jan 08, 2007 11:37 am

instead of bracing, would a double baffle front be okay??

Post by **Bfowler** » Mon Jan 08, 2007 12:39 pm

A double baffle wont add as much strength as some well placed braces to get the best effect, place wood so that it is perpendicular to the face

http://mobile.jlaudio.com/support_pages.php?page_id=166

look at example "C" imagine that as a side view. that style of brace is very effective, and does so without much weight or consuming much space.

thanks for reminding me....i need to finish up my box building tutorial

soundname · Post by **soundname** » Mon Jan 08, 2007 4:49 pm

link me when your box building tutorial is finished. always looking up to brush up on some knowledge about anything car audio

soundname · Post by **soundname** » Tue Jan 09, 2007 12:05 pm

They came in! I have pictures if anyone wants to see them.

http://www.caraudio.com/forum/showthrea ... t&t=206812

Post by **Bfowler** » Tue Jan 09, 2007 12:08 pm

nice amp.....you are in for some good times ahead.

1moreamp · Post by **1moreamp** » Tue Jan 09, 2007 12:35 pm

soundname wrote:They came in! I have pictures if anyone wants to see them.

http://www.caraudio.com/forum/showthrea ... t&t=206812

Your running a Brutus amp to those ??? If So you might want to open the amp up and place rubber cushions under the circuit board, and apply sone silicone heat tranfer paste to all the power devices and then reassemble the amp.

ALL Hifonics Brutus amps have a 1 to 2 year life span because of vibration damage to the electronics inside.
The circuit board has no support in the middle so all the bass your making will cause it to reasonate. And this causes lead frame failure on the outputs. Then they go shorted VIOLA BLOWN AMP ! ...
I have seen the over 60 times in these amps. I even sent a load of amps back to Zenon Electronics limited of Hong Kong China because of this fucked up mechanical assembly of these types of amps.

Nice speakers man, But you should try and fix your amp before it goes up in smoke, from shock vibration. I'm telling you the truth about the Brutus amps. It's what I do for a living... Good Luck on your system

soundname · Post by **soundname** » Tue Jan 09, 2007 1:04 pm

Thanks for the heads up on the amp. I appreciate it.

Post by **AVICJR** » Mon Jan 15, 2007 7:23 pm

What is the mounting diameter, and displacement on a 12"RSd SVC?

Post by **VW337** » Tue Jan 16, 2007 9:02 am

Okay all this has been fun,

1.8cuft = flat response
1.2cuft = near flat response with a mild rise in the 50hz region

If you want loud use 1.2 or do 2.5 total counting driver displacement for a common chamber for both subs.

Otherwise just read through the owners manual which doesn't even state the 1.8 spec for a reason.

The 1.8 spec does not appeal to most listeners and for the simple fact that the enclosure size throws them off, and 90% of the car audio world would not notice a difference between the 1.2 and 1.8 sound unless they had a meter.

PG 12" RSD BOX

PG 12" RSD BOX

Re: PG 12" RSD BOX