best box for SPL

i have 2 15" punch HE's there going in my wifes 93 s-10 blazer  suggestions on on air space and vent size  im selling the amp that was running them im looking at some lanzar amps any body have good or bad luck with them ?

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1974 ford pinto 4 15" punch Z power punch bd 1001 pioneer DEH-6700

generally vented or ported boxes produce the most volume with lower power. However they don't always have a very smooth response.

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If you want pure SPL go with a bandpass. Also, Lanzar is about the same quality as Pyle and Pyramid. Maybe a little better.

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Nik
Jeeputer Progress
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Check it out.

i have a sealed box thats 2.25 cubes per sub .what amp would you recommend for these subs ,and if i built a vented box that was about 3 cubes per sub would it be that much louder ?????

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1974 ford pinto 4 15" punch Z power punch bd 1001 pioneer DEH-6700

ill get back to you on box specifics however 3 cubes tuned to about 40hz will get you into the ballpark for spl on the meter....  Fire the subs up, ports to the back and put each sub in a seaparate chamber.  Proven setups in the lanes for legal metering.

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2x dB Drag World Finalist
2003 Nopi Nat. Street B champ
2004 SBN Street C champ
2004 SBN Advncd NW Champ
2004 Former WR Holder in NW

In loving memory of Jamie Riggs 5/15/85 - 10/8/04

vents or ports and what size ???? any amp suggestions???? i know they can handle more than there rated power i just dont know how much more they are rated at 200 RMS

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1974 ford pinto 4 15" punch Z power punch bd 1001 pioneer DEH-6700

You will decrease power handling in a vented enclosure, so try to keep the power right around the rms figure.

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thanks dwarren i will do that can you think of any good amps that are right around 400 to 450 rms at 2 ohms with low THD levels with remote bass control thats not to expensive

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1974 ford pinto 4 15" punch Z power punch bd 1001 pioneer DEH-6700

hmm, no too expensive is a little vague, why not a Soundstream?

I will have a look.

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Crutchfield has two amps on there for $229. An MTX thunder2301, 300 wrms @ 2 ohms and Fosgate punch 3001 with the same specs. The difference between 450 watts and 300 watts will be inaudible so don't worry about it.

Us Acoustics makes a pretty decent amp for the money, they don't over exaggerate the numbers, however I can't find any right now.



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dwarren wrote:

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You will decrease power handling in a vented enclosure, so try to keep the power right around the rms figure.

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This is false. Within the ports most effective area power handling is actually increased both thermally and mechanically.

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Dave

Pioneer Premier DEH-P660
15" Kicker CVR
Profile AP1000M
It's Loud

audiobass10 wrote:

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dwarren wrote:

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You will decrease power handling in a vented enclosure, so try to keep the power right around the rms figure.

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This is false. Within the ports most effective area power handling is actually increased both thermally and mechanically.

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You both are correct and wrong at the same time...

Mechanical power handling increases near tuning of the box (usually much more than a comparable sealed,) but one octave above or below that tuning the mechanical power handling is actually less.  Also the THERMAL power handling does NOT change.  Thermal power handling is 100% independant of the box design.  Thermal power handling, is quite simply the amount of power that a coil can dissipate.

As a point of refrence my setup:

4 '03 kicker L7 12s  (rms 750w each.)  To each of these subs I am running a Zapco 9.0.   Each of my 4 9.0s carries a rating of 2200watts RMS.  Needless to say I can go WAY over the thermal and mechanical limits of those subs at about EVERY frequency save 38-50hz  loudest note is 42hz.  Above and below that range they will bottom when I bring the full 8.8kW to bear.  And of course Im hugely overloading them thermally....

Keep in mind the more power you apply to the sub in real time, the smaller the bandwith it is capable of playing due to the mechanical limits of the sub.  On my setup I am very limited in the frequencies I can play at full volume.  At normal listening volumes I am fine....  In a sealed box you will have the best powerhandling across a very large bandwith.  A ported box has a smaller bandwith and overall its power handling is less, however near tuning it's mechanical power handling is much much more than that of a comparable sealed.

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2x dB Drag World Finalist
2003 Nopi Nat. Street B champ
2004 SBN Street C champ
2004 SBN Advncd NW Champ
2004 Former WR Holder in NW

In loving memory of Jamie Riggs 5/15/85 - 10/8/04

Bumpin' Yota wrote:

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audiobass10 wrote:

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dwarren wrote:

---

You will decrease power handling in a vented enclosure, so try to keep the power right around the rms figure.

---

This is false. Within the ports most effective area power handling is actually increased both thermally and mechanically.

---

You both are correct and wrong at the same time...

Mechanical power handling increases near tuning of the box (usually much more than a comparable sealed,) but one octave above or below that tuning the mechanical power handling is actually less.  Also the THERMAL power handling does NOT change.  Thermal power handling is 100% independant of the box design.  Thermal power handling, is quite simply the amount of power that a coil can dissipate.

As a point of refrence my setup:

4 '03 kicker L7 12s  (rms 750w each.)  To each of these subs I am running a Zapco 9.0.   Each of my 4 9.0s carries a rating of 2200watts RMS.  Needless to say I can go WAY over the thermal and mechanical limits of those subs at about EVERY frequency save 38-50hz  loudest note is 42hz.  Above and below that range they will bottom when I bring the full 8.8kW to bear.  And of course Im hugely overloading them thermally....

Keep in mind the more power you apply to the sub in real time, the smaller the bandwith it is capable of playing due to the mechanical limits of the sub.  On my setup I am very limited in the frequencies I can play at full volume.  At normal listening volumes I am fine....  In a sealed box you will have the best powerhandling across a very large bandwith.  A ported box has a smaller bandwith and overall its power handling is less, however near tuning it's mechanical power handling is much much more than that of a comparable sealed.

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Guess i wasn't specific enough. Thanks for clearing that up though.

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Dave

Pioneer Premier DEH-P660
15" Kicker CVR
Profile AP1000M
It's Loud

thanks for all the info  i think i'm gonna go with a soundstream amp the 900 D its 900 RMS @ 1 ohm so if i get 2 more subs i won't need to get a new amp  im going to go with the ported box 3 cubes per chaimber can someone give me specs for the box ??

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1974 ford pinto 4 15" punch Z power punch bd 1001 pioneer DEH-6700