[harmon_bro]

Originally Posted by ibm_jennifer

Are they available in chennai

I got them from Gunbir in Delhi and he shipped it to me in 4 days.

[Sam Kapasi]

Originally Posted by ibm_jennifer

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.

[ibm_jennifer]

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)?

[harmon_bro]

Originally Posted by ibm_jennifer

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.

[greenhorn]

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

[ibm_jennifer]

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:



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?

[ibm_jennifer]

Originally Posted by harmon_bro

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?

[harmon_bro]

Originally Posted by ibm_jennifer

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.

[ibm_jennifer]

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?

[ibm_jennifer]

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:

[greenhorn]

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!

[karankapoor]

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.

[ibm_jennifer]

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.

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

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.

[Sam Kapasi]

Originally Posted by ibm_jennifer

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!

[ibm_jennifer]

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?