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Nice sounding open baffle speakers on a Sansui G-5000

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Posted on March 9, 2017 at 08:48:37
Michael Samra
Dealer

Posts: 36118
Location: saginaw michigan
Joined: January 30, 2005



Now that I look at the Sansui,it is too big to be a G-5000 to it's probably a G-3000.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken

 

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RE: Nice sounding open baffle speakers on a Sansui G-5000, posted on March 9, 2017 at 16:12:57
Crazy Dave
Audiophile

Posts: 14371
Location: East Coast
Joined: October 4, 2001
 Hi Michael,

Looks like a variation of the open baffle design on the quarter-wave site (http://www.quarter-wave.com/OBs/OB_Theory.html). The drivers are:

Beston RT002A
Fostex FE126En
Eminence Beta 15A

I am not familiar with the super tweeter, but I would expect the combination to sound good.

Dave

 

RE: Nice sounding open baffle speakers on a Sansui G-5000, posted on March 9, 2017 at 18:31:36
Michael Samra
Dealer

Posts: 36118
Location: saginaw michigan
Joined: January 30, 2005
 I guess he is building some new ones.Those are impressive.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken

 

RE: Nice sounding open baffle speakers on a Sansui G-5000, posted on March 9, 2017 at 18:40:52
airtime
Audiophile

Posts: 11287
Location: Arizona
Joined: February 4, 2003
 I played around with that same fostex for years. It's a bitch to work with and not kind to being filtered. I think in the end I gave them away.

 

RE: Nice sounding open baffle speakers on a Sansui G-5000, posted on March 9, 2017 at 19:29:19
Michael Samra
Dealer

Posts: 36118
Location: saginaw michigan
Joined: January 30, 2005
 That one is using a 1st order crossover so maybe that's the trick?
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken

 

RE: Nice sounding open baffle speakers on a Sansui G-5000, posted on March 10, 2017 at 09:37:19
airtime
Audiophile

Posts: 11287
Location: Arizona
Joined: February 4, 2003
 Between the filters and trying to pad it down it just got too veiled sounding. It was a beasty to tame. In the end those drivers are best left wide open with maybe a first order cap on top and a super tweeter and subwoofer.

 

maaate, you just described the OB in the OPost!, posted on March 13, 2017 at 04:17:26
Timbo in Oz
Audiophile

Posts: 23221
Location: Canberra - in the ACT - SE Australia
Joined: January 30, 2002
 It would need to be measured for its bass roll-off due to the baffle and the bass driver would need a Low-pass to blend. 1st or 3rd order

The ribbon should be rolled in to match the WR driver's own roll-off.

And the WR driver needn't be filtered at all.

Level matching would be necessary, too. But that's not real hard if you choose drivers to be in the ball park. Matching dispersions, so they don't jar in the pass-bands is a biggie too.

IME the 126en sounds best if left alone, except for some parallel RC to flatten the inductance rise it just will have. IF you are going to filter any WR cone-only driver, L-rise eq is vital IME&O.

I've yet to hear a whizzered WR driver I could stay in the room with.








Warmest

Tim Bailey

Skeptical Measurer & Audio Scrounger


 

RE: maaate, you just described the OB in the OPost!, posted on March 13, 2017 at 08:20:53
airtime
Audiophile

Posts: 11287
Location: Arizona
Joined: February 4, 2003
 After all was said and done with that driver, long story short, I just did not care for the sound of it even wide open.
"
But don't get me wrong about single drivers. I used some of Fostex's 8" drivers for a few years. And yes the whizzer cones are a tad irksome

 

Okay, but did you run it with some parallel R &C across them to kill rising inductance with freq'y? , posted on March 13, 2017 at 16:36:20
Timbo in Oz
Audiophile

Posts: 23221
Location: Canberra - in the ACT - SE Australia
Joined: January 30, 2002
 very important, and - IIRC - easy to calculate from the TS parameters.

I am using the original FE103 in Fostex's rec'd Rb boxes with dual-layer walls and BAF, as front spkrs for the FR/Kitchen's HT system. With parallel R&C of course. There's also a 10 inch / 100 w powered sub, fed from a Sherwood HT 5.1 rcvr!

Have 5 more left over, one will go in a Rb centre speaker, and two pairs as distributed OOPhase L&R rears mounted in the rear walls, behind curtains & using Fostex's own grilles.

ALL of them will have R&C across them.

Use MF plastic caps.






Warmest

Tim Bailey

Skeptical Measurer & Audio Scrounger


 

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