Parameters for 6x9s

[Vivek]

Hi all,
I just wonder why no one ever talks of T/S parameters for 6x9 speakers. After all, it does produce bass down to about 50Hz. I bought the JBL GTO936. Any comments, anyone?

Cheers,
Vivek

 

[Cal Weldon]

Hi Vivek,

My guess is that a lot of people just mount them to the back deck or in a premade box so the T/S parameters are not as important, and that when people get serious about their system they choose round drivers over the oval? Does that make sense?

Cal

 

[Vivek]

Agreed that serious audio buffs tend to choose component speakers over ovals. You see, when I bought the speakers from the JBL store, I asked the shopkeeper what box volume would be needed. He had no idea what I was talking about. I wonder how big a box would be good for the 936.

 

[ocool_15]

if you can get parameters for them you should be able to model in winisd or another program. Use only the woofer specs if the other drivers are given.

 

[Dr. Photon]

thiele small parameters are very rare in car audio.

 

[ocool_15]

There available for every decent car subwoofer. My Component set(Infinity Perfect 6.1) came with the t/s parameters for the tweeter and the woofer. If you really want to you could probably run the same tests as you do for subs to find the specs of the 6x9 woofer.

 

[Vivek]

Looks like the only option left is to measure the parameters myself with Speaker Workshop or similar software. Or just try the 6x9 with various box sizes.

 

[richie00boy]

Stuff like that is intended to be mounted on the parcel shelf, effectively in free air.

 

[Vivek]

Stuff like that is intended to be mounted on the parcel shelf, effectively in free air.

True. I own a Suzuki Alto, which is a hatchback. Getting a parcel shelf fitted would take away all the space and leave hardly any room for luggage.
But if I want to put them in boxes, will any box work since 6x9s are free air speakers?
Cheers,
Vivek

 

[richie00boy]

No, free = infinite box. So if you mount them in a box and it's not a huge box then F and Q will raise up quite a bit, in short they will sound worse than on a shelf.

 

[stevenbrenner]

T/S for 6 x 9's

I believe that it is very important to build a cabinet for 6 x 9's using T/S parameters as no two speakers are the same. A little off makes the whole thing sound bad!

 

[Vivek]

Maybe I should try both.

 

[velmeran42]

Have you tried calling JBL and asking for the T/S parameters? Sometimes the big companies will actually tell you these things, but most of the time they won't have a clue what you're talking about. I spent a good 25 minutes on the phone w/ Pioneer one time trying to get the T/S values for one of their subs since my friend lost the paperwork and I couldn't find the info anywhere.

 

[Vivek]

I asked the dealer what box volume would be ideal for the JBL 936. He had no idea and thought I was asking about the volume on the CD player. I just gave up.
Then I asked a friend of mine who is with JBL. He has been looking but I do not think he has found it. I might have to measure the speakers myself.

 

[RCBandwidth]

For Vivek

Vivek: I have obtained great results with a pair of Kicker "693" in a sealed box,14hx9Dx83/4W enclosure,I use these in the shop,I am quite pleased with the result..Good luck Bob C.

 

[Vivek]

Bob, I shall try that. Thanks.
By the way, what is that stuff on the left side of the pic?
Vivek