looking to build a system

[pwnt by pat 10+ year member]

Hey all, first post.

Well, here's what I got: I bought a used car and to my surprise was two 700w sub's in the trunk with a 1400w amp. The subs are Pyramid 700w and that's all I could find out about them. The amp is a Pyle 1400w something... I'll get the specs in the morning. Well, the sound from the subs is great for low a quality system, however it's lacking the really low lows and at higher volumes, the subs clip badly while trying to punch out my double bass metal. The subs don't punch at high volumes though, which I guess is good, but they become really distorted.

Anyway, I'm thinking of selling the subs an the enclosure but keeping the amp. I'd like to get two subs to replace the old two. I am looking to spend no more than about $100 per sub and I'll need a new box. I hear that while ported allowes for a lot more noise, a sealed enclosure gets better SQ which is what I'm after. Maybe I could bridge my amp and use one large sub? I don't know. The thing with sealed boxes is that mine was sealed. When both subs were running, one would punch horribly. So me and a friend drilled a 3" hole in the side of each box and now they fire fine(?).

For the box I was thinking of just using another Best Buy box. I'm not sure about it though 'cause of my previous experience... Maybe if the speakers were designed to be sealed?

Basicly, what I'm looking for is advice on which subs to get in the $100ish range. I'm also looking for advice on the enclosure. Should I buy a cheap one or build my own? Should I port or no? Thanks.

Click to read more...

 

[DBfan187 5,000+ posts]

Eh. Keep what you got. Build you own, PORTED box. Use the tutorials in the box forum.//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[Norcalracer283 10+ year member]

if ur willing to spend 300 for a pair...get 10" Re SE's.... and seal them in a 1.5 cubic foot box

 

[pwnt by pat 10+ year member]

DBfan187, I was thinking of that as another option. I was reading here http://www.caraudioforum.com/vbb3/showthread.php?t=97333 on how to make the box but how can I find the specifications of my subs? I took them out only to drill the hole and the only markings on them are Pyramid 700w right in the center. Would that be RMS or max? How can I determine the max speaker displacement and optimal internal volume?

Lv = (23562.5*Dv^2*Np/(Fb^2*Vb))-(k*Dv)
Dv = port diameter (cm)

Fb = tuning frequency (Hz)

Vb = net volume (litres)

Lv = length of each port (cm)

Np = number of ports

k = end correction (normally 0.732)

(port size)... What is VB? I could figure it out if I knew what it was.

One more question about ports: Do I have to subtract the area the port takes up inside of the box into concideration when building... I mean if the port uses say 117 in^3 and the box is 1.4 ft^3, do I need to make the actual inside 2 592in^3 + 117in^3 = 2709in^3?

Box forum? edit: I'm a dumbass. Don't mind that.

 

[BASS OUTLAW 10+ year member]

DBfan187, I was thinking of that as another option. I was reading here http://www.caraudioforum.com/vbb3/showthread.php?t=97333 on how to make the box but how can I find the specifications of my subs? I took them out only to drill the hole and the only markings on them are Pyramid 700w right in the center. Would that be RMS or max? How can I determine the max speaker displacement and optimal internal volume?

(port size)... What is VB? I could figure it out if I knew what it was.

One more question about ports: Do I have to subtract the area the port takes up inside of the box into concideration when building... I mean if the port uses say 117 in^3 and the box is 1.4 ft^3, do I need to make the actual inside 2 592in^3 + 117in^3 = 2709in^3?

Box forum?

check in the woofer manual //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif it should come with the subs, if not check the manufacturer site //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

and yes you subtract the PORT but not the area , u subtract the PORT VOLUME //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[BASS OUTLAW 10+ year member]

try this one to know more about enclosures http://forums.caraudio.com/vb/showthread.php?t=68635 after u check here, u will know what u want from your subs. then hit us back.

and hey ur current subs are good, u just need a nice enclosure , and u do the GAIN setting in the amp , check on the gain settin tutrial , somewhere floating on the forum ( oh its sticky) //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[pwnt by pat 10+ year member]

I've already run through the gain settings and tuning the amp. I must say that the subs do sound nice. I am just afraid that the amp isn't powerful enough to drive them - even though it's 1400w for two 700w's. The way they are now, a few songs really heavy in the low's will make the subs punch (or sound like punching - it might be my car ratteling). I figured it was the amp and since good amps cost more than good subs, I could go for some less powerful subs and not have to worry about clipping.

In another forum there is a list of quality products ranging from low quality to high and pyramid's are in the lows... ? hmm I can't find the pyramid home page right now but I'll go down to my car and get the amp/sub numbers along with the maximum box size I can use and hopefully begin designing the box. Ported it is... Which is easier to work with, round ports made from pvc pipe or square ports like this: http://randompics.net/shiva/

 

[casscarr2002 10+ year member]

http://www.pyramidcaraudio.com/

I think this is it.

 

[pwnt by pat 10+ year member]

M'kay, here's what I got:

Pyle Plus PLA1440 2 channel amplifier

2x Pyramid Power 700w 4ohm chrome subs pw1277x

Speaker specs (that I could find so far):

Max Frequency Response: 150 Hz

Min Frequency Response: 25 Hz

Top Mount Depth: 4.96 in

700w max 350w rms

4 ohms

Current box size(outside):

28..25x14x14

Approximate internal volume: 2.665 ft^3 - It's a bestbuy box though so I don't think this system was made right.

Max box size(outside):

40x15x15

I would like to tune to 30hz

Can two subs reside in the same chamber of air with two ports or will I have to seperate them with a board between them?

WAY OT - not like box construction isn't - I'm also thinking about getting this amp to power my other speakers:

Eclipse 3242 4 channel amp (440w)

60x4 @ 4 ohm rms110x4 @ 2 ohm RMS

220w rms x2 @ 4 ohm mono

has stereo or mono signal option to all channels, fron and rear gains PLUS pre-out gains for another amp

Any input?

 

[DBfan187 5,000+ posts]

Could try this - http://forums.caraudio.com/vb/showthread.php?t=67594

 

[95RAM 10+ year member]

u guys do realize that he has pyramid and pyle //content.invisioncic.com/y282845/emoticons/sick.gif.b1847c8dabbfeeddbcf1a78052249e10.gif

 

[pwnt by pat 10+ year member]

u guys do realize that he has pyramid and pyle //content.invisioncic.com/y282845/emoticons/sick.gif.b1847c8dabbfeeddbcf1a78052249e10.gif

Hence why I was going to upgrade to higher quality, lower power subs... Thank's for your symapthy[/sarcasim] At least they were free and sound somewhat decent right now.

 

[phatcat600 10+ year member]

You might wanna get rid of that amp too...my friend has one of those 2 channel pyle "1400 watt" amps as well. We looked it up and it only puts out 125 watts a channel, 250 bridged. Those subs are probably overrated bigtime too.

 

[somekook 10+ year member]

get some CVR 12"s. that pyle amp is way overrated if it says 1400 watts, but its under rated by the general bandwagon audiophile wannabe public. if you know what youre doing, or get some good advice, you can get more out of that amp for longer than most people will claim.