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Old 13th March 2013, 06:35 PM   #1
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Default Jbl GTO 1002d

Hello everyone,i got a jbl gto 1002d speaker and i don't know in what enclosure fits best?I hope for best performance and low frequencies.Thank you.
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Old 14th March 2013, 01:18 AM   #2
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Hi fussionn, congratulations with your purchase of a new driver.
JBL GTO1002D 10" DVC
Is it for home or car audio. Do you have in mind any type of system, amps and/or electronic control, please describe.
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Old 14th March 2013, 08:33 AM   #3
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Thank you. I'm holding now a sharp sm7700bk home amplifier with recommended preamplifier. I'm thinking to wire this driver in series for now till I can purchase a new amplifier. It is for home. I can do a bandpass enclosure, it is powerful. I need a low pass frequencies filter, right? Sorry for my English.
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Old 14th March 2013, 12:26 PM   #4
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This driver is good for a QWTL (quarterwave transmission line).
Acoustic transmission line - Wikipedia, the free encyclopedia
Transmission Line Speakers
Quarter Wavelength Loudspeaker Design
A 4th order bandpass can give you more ~4dB but is restricted in frequency, good when you crossover at ~80Hz.
In an easy bass-reflex (BR) you can use an ideal 43 L int. volume alignment, with f3 28Hz-ff/20Hz-in room.
JBL GTO 1002D, VB = 43.3 L, FB = 19.7 Hz
(Note: now the problem with this alignment is that for Port you need a 3" internal with length 77.15cm = 30 3⁄8in.)
So if we change to another alignment say (with f3 21Hz in room)
JBL GTO 1002D, VB = 40.0 L, FB = 22.0 Hz
we have a Port 3" int diam and with length 66.2cm = 26 1⁄16in.
As you see (you can simulate your desired alignment with any software, use WinISD or UNIBOX) now the constraint is the length of the port. For that matter another alignment with higher Fb or shorter port length (Vol=50 L f3=20Hz in room).
JBL GTO 1002D, VB = 50.0 L, FB = 23.0 Hz
Port int. diam. 7.62cm = 3in
Port lenght 45.88cm = 18 1⁄16in
I'm sure you would be fine with this type of port size/máx.lenght (FB ~ 23.0 Hz) for the box volume ~50 L.
Precision Port 3" Flared Port Tube Kit 268-350
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Old 14th March 2013, 03:51 PM   #5
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A 4" is a better port (less noise) only and when always at high/max SPL.
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Old 14th March 2013, 05:45 PM   #6
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Got it.Yor are saying that this driver is good for a QWTL enclosure,but i can't design it.Can you?If you can,please design it and write all sizes,I would be grateful.If you can't design it,can i make an enclosure with port made by myself?I mean, someting like this (i can't find the right word for it: [IMG]/http://194.88.148.41/?mmid=07e3a4a64e18f52d0[/IMG] .
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Old 14th March 2013, 06:47 PM   #7
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Yes, your link shows a bass-reflex (BR) with a rectangular port.
I can not design TL's but can look at the simulations from an artistic point of view. What is the thickness of the wood you're using (+/-)?
Tapered Quarter-Wave Tube Calculator by mh-audio.nl
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Old 14th March 2013, 10:29 PM   #8
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I am using MDF with 20 mm thickness.Thanks
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Old 15th March 2013, 07:56 AM   #9
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Hy. Look, I found this DIY Audio Projects Forum • JBL GTO 1002D Subwoofer Project Build. It's a t-line enclosure for my driver.
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Old 15th March 2013, 11:28 AM   #10
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BFM Table Tuba?
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