Help needed in calculations please

JohnnyJ · 10th September 2005, 11:32 AM

Howzit

I am about to go ahead with my DIY project, which will basically be to align 12 Pyle PLG15 subs in dipole enclosures.

They will be driven by a Behringer Europower 2500 amplifier, I still need to check what EQ I will be getting but I am also purchasing the Behringer Feedback Destroyer.

I'm not an audio professional (

), so I need some help in some calculations for the sound these will be producing.

Take room size as approximately 6m in length, 6m in width and 2.75m in height.

I would like to know approximately what Hz and SPL these subs as a unit will be able to put out

If any more information is needed then please just ask!!

Cheers in advance

JohnnyJ

sumit · 13th September 2005, 08:03 AM

Hi

Dipole subwoofers need good amount of X-max , which is not the case with these pyle drivers. Moreover these drivers are ment more towards car audio rather than home. With a 38Hz Fs they will not produce good deep bass inside your room. These drivers relly on cabin gain to reproduce deep bass inside a car.
For any calculation help please post the TS parameters.

Rgds
Sumit

Tweeker · 13th September 2005, 08:54 AM

Fs on the Pyle PLG-15 is ~26.4hz.

Qts .73. 24mm xmax, but Im pretty sure thats peak-peak.

Given the price, why is this a bad dipole driver?

Pyle PLG series.

The Feedback Destroyer is an eq.

simon5 · 13th September 2005, 02:29 PM

They are rated at 90 dB at 2.83V.
You have 12 drivers so about 100 dB at 2.83V.

I assume you will wire them to get around 4 ohms, I get 5.33 ohms here, you could also wire them to get a 3 ohms load...

So you have 1800W to work with.

You'll get 130+ dB in the midbass.
I guess you will get around 110+ dB at 20 Hz?

sumit · 13th September 2005, 04:18 PM

Fs of 26 Hz is ok.
refer -- http://www.diysubwoofers.org/dipole/design.htm
-- http://www.linkwitzlab.com/woofer.htm
for your design requirements.

Tweeker · 13th September 2005, 10:47 PM

Going with U-frame dipoles as per the NaO system should help you go low. 14" high by 21"-24" long per cabinet. 35.5cm high * 53-61cm long. These are the internal dimensions.

Tweeker · 14th September 2005, 01:33 AM

W frames as per Linkwitz would take alot less space and off some cancelation of 2nd order distortion though.

10th September 2005, 11:32 AM	#1
JohnnyJ diyAudio Member Join Date: Aug 2005	Help needed in calculations please Howzit I am about to go ahead with my DIY project, which will basically be to align 12 Pyle PLG15 subs in dipole enclosures. They will be driven by a Behringer Europower 2500 amplifier, I still need to check what EQ I will be getting but I am also purchasing the Behringer Feedback Destroyer. I'm not an audio professional ( ), so I need some help in some calculations for the sound these will be producing. Take room size as approximately 6m in length, 6m in width and 2.75m in height. I would like to know approximately what Hz and SPL these subs as a unit will be able to put out If any more information is needed then please just ask!! Cheers in advance JohnnyJ __________________ MV Agusta F4-750 SPR

13th September 2005, 08:03 AM	#2
sumit diyAudio Member Join Date: Jan 2005 Location: delhi	Help needed in calculations please Hi Dipole subwoofers need good amount of X-max , which is not the case with these pyle drivers. Moreover these drivers are ment more towards car audio rather than home. With a 38Hz Fs they will not produce good deep bass inside your room. These drivers relly on cabin gain to reproduce deep bass inside a car. For any calculation help please post the TS parameters. Rgds Sumit

13th September 2005, 02:29 PM	#4
simon5 diyAudio Member Join Date: Nov 2004 Location: Québec, Québec	They are rated at 90 dB at 2.83V. You have 12 drivers so about 100 dB at 2.83V. I assume you will wire them to get around 4 ohms, I get 5.33 ohms here, you could also wire them to get a 3 ohms load... So you have 1800W to work with. You'll get 130+ dB in the midbass. I guess you will get around 110+ dB at 20 Hz? __________________ DIYaudio for President !

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13th September 2005, 08:54 AM	#3
Tweeker diyAudio Member Join Date: Dec 2004 Location: Cincinnati, Ohio	Fs on the Pyle PLG-15 is ~26.4hz. Qts .73. 24mm xmax, but Im pretty sure thats peak-peak. Given the price, why is this a bad dipole driver? Pyle PLG series. The Feedback Destroyer is an eq.

13th September 2005, 04:18 PM	#5
sumit diyAudio Member Join Date: Jan 2005 Location: delhi	Fs of 26 Hz is ok. refer -- http://www.diysubwoofers.org/dipole/design.htm -- http://www.linkwitzlab.com/woofer.htm for your design requirements.

13th September 2005, 10:47 PM	#6
Tweeker diyAudio Member Join Date: Dec 2004 Location: Cincinnati, Ohio	Going with U-frame dipoles as per the NaO system should help you go low. 14" high by 21"-24" long per cabinet. 35.5cm high * 53-61cm long. These are the internal dimensions.

14th September 2005, 01:33 AM	#7
Tweeker diyAudio Member Join Date: Dec 2004 Location: Cincinnati, Ohio	W frames as per Linkwitz would take alot less space and off some cancelation of 2nd order distortion though.

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