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Old 13th May 2009, 15:52   #31
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Originally Posted by ibm_jennifer View Post
Are they available in chennai
I got them from Gunbir in Delhi and he shipped it to me in 4 days.
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Old 13th May 2009, 15:52   #32
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Originally Posted by ibm_jennifer View Post
I agree with you and do you suspect it may be the problem to my over bass reproduction?

I have seen one of your thread some days before with pictures regarding enclosure design, do you have any link with you?
This should answer your question. Look on the left.

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Old 13th May 2009, 16:37   #33
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Exactly Sam. So the problem is with the enclosure. Because I couldn't find any difference in the subwoofer sound level

1) If I switched the sub from bridged to single in 75.4 Amp

2) If I reversed the polarity of the sub

So something is over controlling the sub than this factors. Can I polyfill the sub to reduce the size or should I change the enclosure.

Friends, any idea about a good enclosure designer in Chennai (sorry, can't DIY - I am zero here)?

Last edited by ibm_jennifer : 13th May 2009 at 16:41.
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Old 13th May 2009, 18:09   #34
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Originally Posted by ibm_jennifer View Post
Exactly Sam. So the problem is with the enclosure. Because I couldn't find any difference in the subwoofer sound level

1) If I switched the sub from bridged to single in 75.4 Amp

2) If I reversed the polarity of the sub

So something is over controlling the sub than this factors. Can I polyfill the sub to reduce the size or should I change the enclosure.

Friends, any idea about a good enclosure designer in Chennai (sorry, can't DIY - I am zero here)?
PM me for contact details IBM.

Last edited by harmon_bro : 13th May 2009 at 18:24.
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Old 13th May 2009, 20:01   #35
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try getting some old socks or cloth, and stuffing them into the two ports so that the ports are virtually sealed. If the ports are tuned wrong, the levels will decrease, but the quality of the bass should improve
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Old 13th May 2009, 23:00   #36
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try getting some old socks or cloth, and stuffing them into the two ports so that the ports are virtually sealed. If the ports are tuned wrong, the levels will decrease, but the quality of the bass should improve
No, the Sub sound worst, if I closed one/both the ports.

The problem with the sub is its vibrating more than required. If I reduce the input sensitivity its not providing the required bass. If I increase the sub volume, I cant listen. I even cant imagine to use the Bass Boost facility of JBL 75.4

And finally I have removed the sub from the enclosure for some more sealing. Here is the measurements of the enclosure:

Branded Speaker wire in Chennai / India-sub.jpg

Diameter of the Ports: 2.5” EACH
Ports height/depth = 6” each

Inner width of the enclosure= 9.4”
Inner height = 16.8”

Inner depth =14.5 ”

INNER VOLUME = 2289 CUBIC INCH = 1.325 CUBIC FEET


Sam, Its almost smaller than the required size mentioned by you. Will it be a problem. Do you have any idea, what will happen if we use smaller enclosure than the manufacture specified with two ports?

Last edited by ibm_jennifer : 13th May 2009 at 23:12.
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Old 15th May 2009, 14:57   #37
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PM me for contact details IBM.
Bhai, You seems to be very popular. I just called Speed Freaks and they are telling your name. I am going there once I received my EL 6.1 Are they affordable or cheaper than Technocrat for installation works?

Last edited by ibm_jennifer : 15th May 2009 at 14:59.
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Old 15th May 2009, 17:26   #38
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Bhai, You seems to be very popular. I just called Speed Freaks and they are telling your name. I am going there once I received my EL 6.1 Are they affordable or cheaper than Technocrat for installation works?
They are defenitely the best when it comes to installation and you will not regret it. If you want to demo my car sometime be my guest mate.
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Old 16th May 2009, 02:53   #39
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Friends,

As per this site: Speaker Enclosure Volume Calculator

My box is tuned for 53 Hz. Is it bad for JBL GT5-12, Any Idea?
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Old 19th May 2009, 20:35   #40
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Friends,

As there is no reply from Sam, I just replaced the Enclosure with a Fibre-filled 1 Cube Sealed Box. The sound is now perfect and no over-bass or anything.

Check this new Box:

Branded Speaker wire in Chennai / India-subsealed.jpg
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Old 19th May 2009, 20:45   #41
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so it was a case of boomy bloated bass all along

Just like the average FFE is tuned more for noise rather than performance, the average generic box is tuned for noise rather than SQ . Glad to know that it ended well!
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Old 19th May 2009, 22:11   #42
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congrats finally your install is done neatly done.
Can you tell me which connector did you used at the sub end and what is that hiding behind the sub enclosure.
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Old 19th May 2009, 22:21   #43
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Quote:
Can you tell me which connector did you used at the sub end
Its a Speak-On connector from MX. Better than XLR and I recommend MX brand if you cant afford a Neutrik.


Quote:
and what is that hiding behind the sub enclosure.
Baddha bhai, I am trying to get a THX certificate for my Safari(!).

http://www.team-bhp.com/forum/diy-do...-safari-6.html


Quote:
congrats finally your install is done neatly done.
But the credit should go to harmon_bro. And its my duty here to warn all Chennai Guys to be very careful about Technocrat(They called themself as No:1 in chennai). I lost almost Rs. 5000 because of a bad install from technocrat. If you are going to technocrat, please PM be for complete details.

I have to replace the entire power cable(they used 9 gauge instead of 8/6 gauge for 75.4), entire speaker wires(they are not OFC) and the sub enclosures. Even the speaker door holes are sealed now and tweeters are flush mounted.

Last edited by ibm_jennifer : 19th May 2009 at 22:29.
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Old 20th May 2009, 13:19   #44
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Quote:
Originally Posted by ibm_jennifer View Post
Friends,

As there is no reply from Sam, I just replaced the Enclosure with a Fibre-filled 1 Cube Sealed Box. The sound is now perfect and no over-bass or anything.
I'm sorry, I thought by posting the box specs I'd answered your query, I did not realise you had another question for me. Forgive me.

But it looks like you've sorted it out well. And most important, you're happy!
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Old 20th May 2009, 13:29   #45
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Yes bhai, Its all because of the stupid ready-made enclosure. Now the JBL rocks its its own house. And Sam, i have 2 more questions for you:

If I connect the Sub in Amp Bridge mode, should I need to give stereo input or Mono input will be enough to bridge 2 channels?

Which Amp do you recommend for this sub? I have two - JBL 1004 and JBL 75.4?
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