The Dilemma of the Low_Bass_makker/s?

Invinsible · 18th August 2009, 11:35

Having a 2 subs will surely make difference even when listening music at low level. Am not sure what Frank is looking at if looking at even High level SQ bass, a single GTi would hit about 130-133 db spl with 1000W. That's loud enough to fill one's SQ requirement. No doubt the Xmax will be stressed at this level, but than again that's what Gti subs are meant for. The other solution could be gettng a ported enclosure in which the Gti works the best, about 2cu.ft with port tuned anywhere below 35hz which might push the SPL further more.

frankmehta · 19th August 2009, 00:50

nahi. i really dont think I will need the services of two of them. boot space is slightly at a premium, and this sub itself is huge enough to give me headache as to where to place it.

navin · 19th August 2009, 10:41

Quote:

Originally Posted by frankmehta

this sub itself is huge enough to give me headache as to where to place it.

you can kindly place it in my Skoda!

However I can assure you that this placement will not improve the quality or quantity of bass in your car.

frankmehta · 19th August 2009, 11:32

LOL. Guys there is an update. My Amplifier has shipped from Crutchfield and should be delivered to NY today. Should be here in the next month now :-@

frankmehta · 21st August 2009, 00:25

guys. i need suggestions about the enclosure. Ajay bhai has suggested an inverted install with a sealed FG enclosure with a volume of 1.2 cu ft.

I was also thinking along the lines of an MDF enclosure with a Plexi window. This design has been suggested by Invinsible.

Here's how it looks.
Which would be better? I would prefer FG since one can make it look plush and utilize a nook/corner in the boot.

The mDF/Plexi with a few lights inside would look like 'cool maal.'

Waiting for suggestions. I know for a fact that the FG enclosure (if made thick) will sound better. The MDF/Plexi enclosure might have air leakages due to plexiglass and the plexi might flex too..
Please advise!

stefanm · 21st August 2009, 01:05

Dude please don't do the plexi, go for the fg with mdf for flat surfaces, lots if bracing and 2 layers of csm, you won't regrett.

low_bass_makker · 21st August 2009, 11:37

How thick will be the plexi glass ?

Invinsible · 21st August 2009, 11:55

That box design was suggested considering 500 rms amp that was available before. With the new amp I suggest you get the enclosure made in 1" MDF on all sides accept the front and the top baffle which would have the plexiglass. Needs to be done with 1.25" -1.5" thickness.
The plexiglass will be 18-20mm. Also make use of bracing on all the joints with layer of FG on the inside wall of the enclosure. Add 16-20ounce of poly fill on all the inside sidewalls to cut/absorb those standing waves.

Complete FG sealed enclosure in this case might take same or more amount of space since the mounting depth of the sub itself is around 10".
Also i strongly suggest the enclosure would need to be around 1.3/1.4 cu.ft net volume for a good low end ext. output.

Adding some LED would be great

Invinsible · 21st August 2009, 12:30

Also I like to add that FG enclosure might add a bit of resonance unless it's deaden, although many would disagree here. A good FG enclosure would require minimum 4layers and good 8 layers. You could also use HDF/HDP instead of MDF. i would still go in for a good MDF enclosure.

Invinsible · 21st August 2009, 12:59

Also I like to add that FG enclosure might add a bit of resonance unless it's deaden, although many would disagree here. A good FG enclosure would require minimum 4layers and good 8 layers. You could also use HDF/HDP instead of MDF. i would still go in for a good MDF enclosure.

navin · 21st August 2009, 13:14

Quote:

Originally Posted by frankmehta

Ajay bhai has suggested an inverted install with a sealed FG enclosure with a volume of 1.2 cu ft.
Waiting for suggestions. I know for a fact that the FG enclosure (if made thick) will sound better.

Quote:

Originally Posted by Invinsible

enclosure made in 1" MDF on all sides accept the front and the top baffle which would have the plexiglass. Needs to be done with 1.25" -1.5" thickness.
The plexiglass will be 18-20mm. Adding some LED would be great

Frank wrt light I have one rule for Audio - "If you want lights go buy a christmas tree".

Go FG. The enclusre will be a triffle smaller as the wall thicknesses will be less.

frankmehta · 22nd August 2009, 18:31

Hmm. So fibre glass vs mdf seems like the debate all over. yes, FG has to be thick.

Which one of the two has better acoustic qualities?

pranava999 · 22nd August 2009, 20:32

Whats all this plexi doctorji? boofer kein saath timing lights bhi fit kardijiye... Jab bhaas bhajegi lights chamkhenge, pura dance bar banjayega!

K.I.S.S

navpreet318 · 22nd August 2009, 21:51

why don't you something like manan's car.inverted install into an MDF sealed box.very tight.and very fast.right at the centre of the rear seat.would be a good massaging system for the parents too.

abhibh · 22nd August 2009, 22:22

Quote:

Originally Posted by navpreet318

why don't you something like manan's car.inverted install into an MDF sealed box.very tight.and very fast.right at the centre of the rear seat.would be a good massaging system for the parents too.

I second this. The sub will look good inverted and you can add some bling bling neons to the setup

18th August 2009, 11:35	#136
Invinsible Senior - BHPian Join Date: Nov 2006 Location: Bombay Posts: 1,257 Thanked: 62 Times	Having a 2 subs will surely make difference even when listening music at low level. Am not sure what Frank is looking at if looking at even High level SQ bass, a single GTi would hit about 130-133 db spl with 1000W. That's loud enough to fill one's SQ requirement. No doubt the Xmax will be stressed at this level, but than again that's what Gti subs are meant for. The other solution could be gettng a ported enclosure in which the Gti works the best, about 2cu.ft with port tuned anywhere below 35hz which might push the SPL further more.
	() Thanks

19th August 2009, 00:50	#137
frankmehta Senior - BHPian Join Date: Mar 2006 Location: Mumbai Posts: 4,000 Thanked: 3,577 Times View My Garage	nahi. i really dont think I will need the services of two of them. boot space is slightly at a premium, and this sub itself is huge enough to give me headache as to where to place it.
	() Thanks

19th August 2009, 11:32	#139
frankmehta Senior - BHPian Join Date: Mar 2006 Location: Mumbai Posts: 4,000 Thanked: 3,577 Times View My Garage	LOL. Guys there is an update. My Amplifier has shipped from Crutchfield and should be delivered to NY today. Should be here in the next month now :-@
	() Thanks

21st August 2009, 00:25	#140
frankmehta Senior - BHPian Join Date: Mar 2006 Location: Mumbai Posts: 4,000 Thanked: 3,577 Times View My Garage	guys. i need suggestions about the enclosure. Ajay bhai has suggested an inverted install with a sealed FG enclosure with a volume of 1.2 cu ft. I was also thinking along the lines of an MDF enclosure with a Plexi window. This design has been suggested by Invinsible. Here's how it looks. Which would be better? I would prefer FG since one can make it look plush and utilize a nook/corner in the boot. The mDF/Plexi with a few lights inside would look like 'cool maal.' Waiting for suggestions. I know for a fact that the FG enclosure (if made thick) will sound better. The MDF/Plexi enclosure might have air leakages due to plexiglass and the plexi might flex too.. Please advise! Attached Thumbnails
	() Thanks

21st August 2009, 01:05	#141
stefanm BHPian Join Date: Aug 2007 Location: Usa Posts: 212 Thanked: 2 Times	Dude please don't do the plexi, go for the fg with mdf for flat surfaces, lots if bracing and 2 layers of csm, you won't regrett.
	() Thanks

21st August 2009, 11:37	#142
low_bass_makker Senior - BHPian Join Date: Mar 2006 Location: Faridabad Posts: 6,815 Thanked: 305 Times View My Garage	How thick will be the plexi glass ?
	() Thanks

21st August 2009, 11:55	#143
Invinsible Senior - BHPian Join Date: Nov 2006 Location: Bombay Posts: 1,257 Thanked: 62 Times	That box design was suggested considering 500 rms amp that was available before. With the new amp I suggest you get the enclosure made in 1" MDF on all sides accept the front and the top baffle which would have the plexiglass. Needs to be done with 1.25" -1.5" thickness. The plexiglass will be 18-20mm. Also make use of bracing on all the joints with layer of FG on the inside wall of the enclosure. Add 16-20ounce of poly fill on all the inside sidewalls to cut/absorb those standing waves. Complete FG sealed enclosure in this case might take same or more amount of space since the mounting depth of the sub itself is around 10". Also i strongly suggest the enclosure would need to be around 1.3/1.4 cu.ft net volume for a good low end ext. output. Adding some LED would be great Last edited by Invinsible : 21st August 2009 at 12:12.
	() Thanks

21st August 2009, 12:30	#144
Invinsible Senior - BHPian Join Date: Nov 2006 Location: Bombay Posts: 1,257 Thanked: 62 Times	Also I like to add that FG enclosure might add a bit of resonance unless it's deaden, although many would disagree here. A good FG enclosure would require minimum 4layers and good 8 layers. You could also use HDF/HDP instead of MDF. i would still go in for a good MDF enclosure.
	() Thanks

21st August 2009, 12:59	#145
Invinsible Senior - BHPian Join Date: Nov 2006 Location: Bombay Posts: 1,257 Thanked: 62 Times	Also I like to add that FG enclosure might add a bit of resonance unless it's deaden, although many would disagree here. A good FG enclosure would require minimum 4layers and good 8 layers. You could also use HDF/HDP instead of MDF. i would still go in for a good MDF enclosure.
	() Thanks

22nd August 2009, 18:31	#147
frankmehta Senior - BHPian Join Date: Mar 2006 Location: Mumbai Posts: 4,000 Thanked: 3,577 Times View My Garage	Hmm. So fibre glass vs mdf seems like the debate all over. yes, FG has to be thick. Which one of the two has better acoustic qualities?
	() Thanks

22nd August 2009, 20:32	#148
pranava999 BHPian Join Date: Aug 2006 Location: BANGALORE Posts: 845 Thanked: 23 Times View My Garage	Whats all this plexi doctorji? boofer kein saath timing lights bhi fit kardijiye... Jab bhaas bhajegi lights chamkhenge, pura dance bar banjayega! K.I.S.S Last edited by pranava999 : 22nd August 2009 at 20:33.
	() Thanks

22nd August 2009, 21:51	#149
navpreet318 Senior - BHPian Join Date: Jul 2005 Location: Dehradun Posts: 2,264 Thanked: 2,983 Times	why don't you something like manan's car.inverted install into an MDF sealed box.very tight.and very fast.right at the centre of the rear seat.would be a good massaging system for the parents too.
	() Thanks