OK this is what i have in my dodge right now it is a 1500 ram ex cab i have 2 10w1v2 and a rockforfosgate p3002 this is my ? ya it sounds ok but its not good enuf for me so i was thinking how much of a dif. would it make it i got 2 10w3's or 10w3v2's in a slot port box that is what the 10w1v2's are in now would this make a big dif. i know you will know thanks a lot for the help
Replies (8)
lessismorespl on 07/3/2005 08:32:28
The 10W3V2 will make some minor difference, but your enclosure design will make the most difference. The slot ported enclosure is a prefab...right? If you have a slot ported enclosure built and tuned properly, it will give you more of what I believe you are looking for. Also, that amp is not giving those subs what they need, it is 75 x 2, which is only half of the W1V2 wRMS.
Here is my thought on this:
Get a good Class D amp, since you alrady have a RF 2 channel, try the RF Punch P3001, it is 300 @ 2ohms, which is right on what the W3V2 subs can handle. Buy a good set of components and run the 3002 on them.
I would consider getting an enclosure built, that would also improve the over performance of the subs. Many people are not happy w/ their system due to using prefab enclosures, once they get the subs in a well built enclosure designed to the T/S Parameters of the sub. Just something to think about.
less
swez on 07/3/2005 12:31:39
Here are the specs and box recommedations for that pair of subs. The come in 4 and 8 ohm versions. Do you know which one you have now? (4 or 8 ohm model) Knowing that info, will help determine the best amp option for these subs.
Enclosures recommendatons:
http://www.jlaudio.com/subwoofers/pdfs/10W1v2_MAN.pdf#search='JL%2010w1v2'
If these are 8 ohm drivers, can bridge the present RF amp into MONO and run both subs in parallel (net 4 ohm load) for a solid 150 Wrms per sub) If these are 4 ohm drivers, then Less' suggestion of the RF P3001 is your best bet.
If you do use a ported enclosure, it is good to have a Sub Sonic Filter (SSF) installed at the amp input section. This will protect your subs from signals below tuning frequency that can be damaging to any sub. The JL slot port enclosure nets a 31 Hz., tuning frequency. The correct SSF would be a 30 Hz., High Pass Filter (HPF) with at least 12dB/octave rolloff slope.
Harrison Labs makes a device called the F-Mod. These are cheap and very effective SSF devices. Have a look:
http://www.thezeb.com/p-Harrison-Labs-FMOD-900059-101684.htm
Hope that helps,
Swez
BgDustin4 on 07/3/2005 18:33:54
my bad i do have the p3001 and the jl dealer said that box was good for them subs but i don't know looks like a reg old box to me
BgDustin4 on 07/3/2005 18:34:05
o and i have the 4 ohm ones
BgDustin4 on 07/3/2005 18:35:03
i got them ssf on em but thanks that is what they told me i would blow em unless i got them
BgDustin4 on 07/3/2005 18:36:26
what shuld i set the amp on i got it at 70-80
lessismorespl on 07/3/2005 19:29:41
In most cases, a prefab enclosure, especially ported ones, are one of 2 things:
1. either the internal volume is too small and the port opening is too big.
or
2. the internal volume is too much and the port opening is too small.
I'm sorry to say that too many dealers try to push prefab enclosures so their installers are free to do installs rather than build enclosures. Best Buy, (sorry UK) Circuit City, and many other big box retailers really push prefab enclosures, not only b/c it keeps the installers free, but there is such a high mark up on prefab enclosures(example: Q-Logic .85 cu ft. sealed dual 10, right about $85 @ Best Buy & Circuit City, they get them for like $30, the R/T dual 10 enclosure run Best Buy $25 ea., and they sell them for $60) there is a huge markup on enclosures, we get the dual 12 slot ported enclosures for $45 and sell them for $90. Bottom line, if those subs were installed into a well built, properly tuned 3/4" MDF enclosure, you would be amazed at the difference. As for your SSF being set that high, I would drop it down to 45-50 hz, that even high for SPL competition, try going down to 40-50 hz.
less
swez on 07/5/2005 11:11:15
Just to clarify, the low pass filter on amp should be set to about 80 Hz. The SSF should be set close to the Port Tuned Frequency as possible.
As Less mentioned, prefab boxes are not always optimal for every sub on the market. Especially ported or vented models. If we don't know the internal dimensions of the box or its port dimensions, hard to say where PTF actually is. Setting the SSF at 40 Hz or a tad above, will usually prevent sub damage. But it may not be optimal for deep bass tones. (below 40 Hz.)
Swez
Replies (8)
lessismorespl on 07/3/2005 08:32:28
The 10W3V2 will make some minor difference, but your enclosure design will make the most difference. The slot ported enclosure is a prefab...right? If you have a slot ported enclosure built and tuned properly, it will give you more of what I believe you are looking for. Also, that amp is not giving those subs what they need, it is 75 x 2, which is only half of the W1V2 wRMS.
Here is my thought on this:
Get a good Class D amp, since you alrady have a RF 2 channel, try the RF Punch P3001, it is 300 @ 2ohms, which is right on what the W3V2 subs can handle. Buy a good set of components and run the 3002 on them.
I would consider getting an enclosure built, that would also improve the over performance of the subs. Many people are not happy w/ their system due to using prefab enclosures, once they get the subs in a well built enclosure designed to the T/S Parameters of the sub. Just something to think about.
less
swez on 07/3/2005 12:31:39
Here are the specs and box recommedations for that pair of subs. The come in 4 and 8 ohm versions. Do you know which one you have now? (4 or 8 ohm model) Knowing that info, will help determine the best amp option for these subs.
Enclosures recommendatons:
http://www.jlaudio.com/subwoofers/pdfs/10W1v2_MAN.pdf#search='JL%2010w1v2'
If these are 8 ohm drivers, can bridge the present RF amp into MONO and run both subs in parallel (net 4 ohm load) for a solid 150 Wrms per sub) If these are 4 ohm drivers, then Less' suggestion of the RF P3001 is your best bet.
If you do use a ported enclosure, it is good to have a Sub Sonic Filter (SSF) installed at the amp input section. This will protect your subs from signals below tuning frequency that can be damaging to any sub. The JL slot port enclosure nets a 31 Hz., tuning frequency. The correct SSF would be a 30 Hz., High Pass Filter (HPF) with at least 12dB/octave rolloff slope.
Harrison Labs makes a device called the F-Mod. These are cheap and very effective SSF devices. Have a look:
http://www.thezeb.com/p-Harrison-Labs-FMOD-900059-101684.htm
Hope that helps,
Swez
BgDustin4 on 07/3/2005 18:33:54
my bad i do have the p3001 and the jl dealer said that box was good for them subs but i don't know looks like a reg old box to me
BgDustin4 on 07/3/2005 18:34:05
o and i have the 4 ohm ones
BgDustin4 on 07/3/2005 18:35:03
i got them ssf on em but thanks that is what they told me i would blow em unless i got them
BgDustin4 on 07/3/2005 18:36:26
what shuld i set the amp on i got it at 70-80
lessismorespl on 07/3/2005 19:29:41
In most cases, a prefab enclosure, especially ported ones, are one of 2 things:
1. either the internal volume is too small and the port opening is too big.
or
2. the internal volume is too much and the port opening is too small.
I'm sorry to say that too many dealers try to push prefab enclosures so their installers are free to do installs rather than build enclosures. Best Buy, (sorry UK) Circuit City, and many other big box retailers really push prefab enclosures, not only b/c it keeps the installers free, but there is such a high mark up on prefab enclosures(example: Q-Logic .85 cu ft. sealed dual 10, right about $85 @ Best Buy & Circuit City, they get them for like $30, the R/T dual 10 enclosure run Best Buy $25 ea., and they sell them for $60) there is a huge markup on enclosures, we get the dual 12 slot ported enclosures for $45 and sell them for $90. Bottom line, if those subs were installed into a well built, properly tuned 3/4" MDF enclosure, you would be amazed at the difference. As for your SSF being set that high, I would drop it down to 45-50 hz, that even high for SPL competition, try going down to 40-50 hz.
less
swez on 07/5/2005 11:11:15
Just to clarify, the low pass filter on amp should be set to about 80 Hz. The SSF should be set close to the Port Tuned Frequency as possible.
As Less mentioned, prefab boxes are not always optimal for every sub on the market. Especially ported or vented models. If we don't know the internal dimensions of the box or its port dimensions, hard to say where PTF actually is. Setting the SSF at 40 Hz or a tad above, will usually prevent sub damage. But it may not be optimal for deep bass tones. (below 40 Hz.)
Swez
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