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Multi-Way Conventional loudspeakers with crossovers

"Small" enclosure for Tannoy 15"
"Small" enclosure for Tannoy 15"
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Old 28th June 2012, 04:27 PM   #31
doctordata is offline doctordata  Australia
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Cheers ,
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File Type: jpg tannoytdu2.jpg (64.1 KB, 194 views)
File Type: jpg syncsource.jpg (151.7 KB, 178 views)
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Old 28th June 2012, 04:30 PM   #32
Zen Mod is offline Zen Mod  Serbia
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"Small" enclosure for Tannoy 15"
tnx !

and , now , just for the public - one still missing info all around the net - where exactly that circuit is connected .............

TIA

(please - don't mix any of these spks with Picado board !

)
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Old 28th June 2012, 04:46 PM   #33
doctordata is offline doctordata  Australia
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cut your tweeter wires and connect to the board , connect the tweeter wires to the other side of the board . Just mount this circuit between your HF see the schematic
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Old 28th June 2012, 04:53 PM   #34
Zen Mod is offline Zen Mod  Serbia
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"Small" enclosure for Tannoy 15"
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Old 28th June 2012, 04:58 PM   #35
doctordata is offline doctordata  Australia
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Please keep me informed about your speakers , very interested ,

Cheers ,

Rens
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Old 28th June 2012, 05:01 PM   #36
Zen Mod is offline Zen Mod  Serbia
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"Small" enclosure for Tannoy 15"
will make a thread , when tested ......... in fact - I'll post here , on Tannoy Yahoo Group and on Quarter Wave Yahoo Group

unfortunately - have some other things to do in a meantime

MLTL calculated with MJK software - Quarter Wavelength Loudspeaker Design
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Old 28th June 2012, 06:34 PM   #37
Charles Darwin is offline Charles Darwin  United Kingdom
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Quote:
Originally Posted by doctordata View Post
I can hear a difference , and my ears are quite old , I did an A/B test with a switch and it is significant , I dont agree with your timing assumptions ,even with your fancy name , I did some measurements , not micro's but mili's , have to document them but come back on this .

Cheers ,

Rens
You can always calculate it.
Its been awhile since I had mine out of their cab but with the K-series drivers the distance between the voice coils can't be much more than 3cm or so.
The AlNiCo drivers with their much deeper magnet structures had the tweeter coil exactly 1/4 of the xover frequency behind. Taking the phase shifts induced by the xover into account the output was in phase but not in time ie shifted by one cycle. K-series are neither but the mismatch is a lot smaller.

My Little Reds are early ones and never had the SyncSource fitted.
Consequently I got curious about its possible benefits and joined the Tannoy Yahoo group which is where I learned about its origin and that their design engineer is on record as saying that the SyncSource circuit creates more problems than it solves but at the time time alignment was The buzzword in the States and that was their main market . Lockwood Audio also advised not to bother with it for similar reasons.
It gels nicely with my experience that inductors in the signal path are best kept to a minimum. To my ears they are substantially more detrimental to SQ than caps hence I now run my speakers active.

Also to my ears timing discrepancies always sounded worse when the tweeter is in front of the woofer (as in your standard dome-cone box) than behind by a similar distance (as with a horn midtweeter-cone box).
I have no idea why though…
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Old Today, 05:54 PM   #38
gilwe is offline gilwe  United States
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Resurrecting an old thread... Just got a pair of lovely SRM12X with the syncsource.

I read that these speakers sound better with no syncsource engaged, but would like to have your opinions before I go on and remove it.

How much "better" would they sound, if at all?
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