SUBWOOFER CHOICE

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cla89

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Joined 2012
#1
#4
Thank you for your answer! I would a subwoofer with flat response from 20 to 100hz. A powerful subwoofer with a good pressure and deep bass. My shearch, now has restricted to 2 drivers. Monacor SPH-380TC and CIARE PW392 (http://www.ciare.com/pdf/catalogo/PW392.PDF)
I've simulated with winisd pro. For both, i chosed a box of 127 liters tuned to 23,5hz. From my simulations, ciare is better than monacor. What do you think?
I have not tried to simulate Tapped Horn configuration..
 
#5
cla89 said:
..I have not tried to simulate Tapped Horn configuration..
Click to expand...

Hi,

But I've simulated the Ciare PW392 driver in T-TQWT's:

b🙂
 

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#9
I hope to learn much of diy! But also i want to learn english very well!
However an 18" subwoofer is too large for my room. It's 15 square meters, it's too small for this driver. I think it need of a large room for reproduce very low frequency..Is no it?
 
#10
cla89 said:
I hope to learn much of diy! But also i want to learn english very well!
However an 18" subwoofer is too large for my room. It's 15 square meters, it's too small for this driver. I think it need of a large room for reproduce very low frequency..Is no it?
Click to expand...

You do not need a large room to make very low frequencies. The size of a room (long dimension) will tell you at what frequency the room will begin to exhibit room gain (pressurization) if it is well sealed.

Here is a paper written on the topic. http://www.cartchunk.org/audiotopics/SmallEnclBass.pdf

If you have any questions about the Language or maths please ask.

Sincerely
revb.
 
#12
cla89 said:
Hi, i'm interested in building a subwoofer to be used to listen all kinds of music and for reproduce very loud movie bass effect. My room is 15 square meters. The drivers of my interest are those:

Monacor SPH-450TC SPH-450TC - Stage-Line 18 inch subwoofer 2 x 500WMAX 2 x 4 Ohm - Europe Audio

Monacor SPH-380TC SPH-380TC - Stage-Line 15 inch subwoofer 2 x 400WMAX 2 x 4 Ohm - Europe Audio

I Would use a Behringer EP2500 like subwoofer amp.
Thanks for your attenction.
Click to expand...

Follow transducer's are very good for large vented chambers (1000-2000 liters):
1) 2 pcs PD2150 or PD186
2) 2 pcs McCauley 6258
McCauley.com : Products: Accessories > 6258: Overview
for examples go to my website

For smaller cabinets (as "closed box") follow bass drivers are very good:
1) 2-4 pcs Eminence LAB12 and LAB15
http://www.eminence.com/pdf/LAB_12.pdf
2) 2-4 pcs ETON 11-581-50-hex
Bässe*-*Home-HiFi*-*Produkte*-*Eton GmbH

The value for Qms by the SPH-450TC is possibly too low for a clear and tight bass response.
This reminds me at the Qm value of the Magnat Agressor 6000 and 5000, that I have both heard and measured several years ago.
http://www.magnat.de/fileadmin/user_upload/Produkte/BDA139505.pdf
http://www.alt-spb.ru/articles/files/magnat_agressor6000_big.jpg
http://bilder.hifi-forum.de/medium/157418/omega530-001_152366.jpg
http://www.magnat.de/fileadmin/user_upload/Produkte/BDA142401_EN.pdf
http://www.youtube.com/watch?v=uzSfvtglkfM
Very bad for me in all respects (except SPL).

BTW - avoid exotic variantes so as dipoles and prefer vented or closed boxes - independend of the available space in your room.
 
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#14
bjorno said:
Hi,

But I've simulated the Ciare PW392 driver in T-TQWT's:

b🙂
Click to expand...


Trust this guy! I just built a design of his, I no longer consider building "standard" subwoofers anymore. The sound is like no other..... the only thing so far that I have found to compare it to, is live music at a concert. That kind of power and pressure. You have to make a fairly large enclosure, but you get low extension and moderate to high efficiency, and an effortless, powerfull sound.
 
#15
@ tiefbassuebertr: I've seen your post, but 1000liters are too much for me..i wouldn't exceed 200liters..I have already a 12inch subwoofer but it's small for my prerogative. That's why i'm opting for a 15 or 18 inch driver able to reproduce a flat responce between 20 to 100hz with a good sound pressure. I've read about the SPH-450TC that it's lacking in punch.. It doesn't work very well..
@permo: also i know that the T-TQWT's configuration is better, but i don't know still design a horn. I've found a guide on the web and i hope to learn quickly!
 
#17
cla89 said:
@ tiefbassuebertr: I've seen your post, but 1000liters are too much for me..i wouldn't exceed 200liters..I have already a 12inch subwoofer but it's small for my prerogative. That's why i'm opting for a 15 or 18 inch driver able to reproduce a flat responce between 20 to 100hz with a good sound pressure. I've read about the SPH-450TC that it's lacking in punch.. It doesn't work very well..
@permo: also i know that the T-TQWT's configuration is better, but i don't know still design a horn. I've found a guide on the web and i hope to learn quickly!
Click to expand...
...I've read about the SPH-450TC that it's lacking in punch.. It doesn't work very well.... I think mainly cause the high mechanical losses in the suspension (low Qms).


Flat down to 20 Hz and only 200 liters? Very very small for undistorted 20Hz by resonable SPL.
Only closed box is possible, if low distortion is desired (i. e. not vented box). And only with help of electronical correction from the frequency response (acoustical 36 dB high pass/subsonic filter must be obtained by a -6db cuttoff frequency of 15-18 Hz).
But you can also try a bassreflex port, however choice a tuning frequency arround 45-50 Hz (for rockmusic 20 Hz are not necessary). So your vented aera is not too small.


BTW - read my explanations on my website - because the language is German the lanuage tools from google for translate in your language are more helpful than by translate in english - so I think.

What are the outside proportions you prefer?

Perhaps this transducer with exceptionally good price-performance ratio is a good choice.
Precision Devices PD.2450
or this one:
Precision Devices PD.2150
Precision Devices PD2150 | 21"zoll 54cm Worldclass - Referenz Subwoofer Chassis, Selbstbau - HIFI-FORUM
One of both is used in the commercial available sub woofer model "Sub 2100" from ADAM Audio
Sub2100 - Description | ADAM Audio GmbH
Sub2100 - Downloads | ADAM Audio GmbH

For distortionless sonic transmission down to the lowest register the vented aera is to be closed.
Then this commercial subwoofer sounds good.
 
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#18
Post #4 from cla89:
..From my simulations, ciare is better than monacor. What do you think?..I have not tried to simulate Tapped Horn configuration..
Click to expand...

FYI,

A late response: IMO: Both drivers are good driver components but different.

Provided they are put in suitable designs targeting proper system qualities and use, both will provide good FR extension/ blameless SQ at SPL's loud enough for most listeners.

Submitting a simulation with the Monacor: Stage-Line_SPH-450TC drivers.

b 🙂
 

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