Calling Andy Graddon off thread

[Moondog55]

Hi Andy, I have aquired a pair of the Jaycr 10 inch carbon fibre bass drivers and as you have recomended them in past threads, I was wondering if you still had the nominal T/S parametres on file??
Pity about Jaycars customer service, I tried to get an Email response ( sorry I could not resist!!) but no luck.
I have the early model either 4 or 8 ohms, still no test gear and I am not paying $45 Aud to have the local speaker repair shop put them on "Woofer Tester"
Thanx Ted

 

[Andy G]

Jaycar 10" carbons... nah, no good at all..

but if you send em here, I'll find some use for them!


btw.... ygm !

 

[Moondog55]

Thanx Andy, we should all keep a collection of back-catalogues
impressive graph, but mine may be the model before those even
Mine are labelled RW 10 and have that daggy "irresponsible " logo.
8 or 4 R impedance ( 6.5 or 3.5 R)but it is interesting that when I parallel the inputs I still get 3.5 R DC
But it does look like that is the same driver, small sealed box coming up

 

[Andy G]

dual coil?
I seem to remember a 10" with a concave dust cap. A car sub actually, reputedly quite good, but not at all the same as what I was thinking you had. So any comments re SQ are null !!

Will drag out the old cattledogs and see what I can find !!

 

[Moondog55]

Nope, convex dustcap, similar spider and bump-out with vented voicecoil, just like the little 6inch mid-woofers CS2240.
If they are the same but higher impedance with luck the Qts will be slightly higher

 

[Andy G]

well, if it isn't the one I sent you the info for, its before my collection of cattledogs. sorry I can't help more !!

 

[Moondog55]

OK, Aussie DIYer's, who's got a collection of old Jaycar catalogues.
It will be a month before my Woofer tester gets here and I don't want to put this in a box that's too big

 

[Andy G]

can you take a couple of pics? maybe I can figure out what it is that way.

 

[Moondog55]

I found the camera ;Check your in box, YGM
See what you think
Ted

 

[Moondog55]

If any Aussies reciognise these and have the T/S specs please let me know

 

[Moondog55]

I know this is an old thread but I found the relevant catalogue on eBay, cost me all of $5- plus postage of course, lower Fs and lower Qts that the later model;
Nope, I haven't yet used them, waiting for time and money

 

[PeteMcK]

Hi Moondog, years ago I bought one of their 8" carbon fibre woofers, the cat. said QMS of 3.something, once I got around to measuring it the actual QMS was ~7... definitely a typo in the catalogue. It's still a great driver, just needs a much larger box than I was expecting

 

[sreten]

Hi Moondog, years ago I bought one of their 8" carbon fibre woofers, the cat.
said QMS of 3.something, once I got around to measuring it the actual QMS
was ~7... definitely a typo in the catalogue. It's still a great driver, just needs
a much larger box than I was expecting

Hi,

Qes is the major factor in determining Qts which determines box size.
Such a variation of Qms does not imply a much larger box size, a little.

rgds, sreten.

 

[PeteMcK]

IIRC, the box size from the cat specs was ~28 L, from measurements it's 50 L

 

[Moondog55]

Qms does determine in many cases tho the ability to use a first order bass boost capacitor bank and a lot of these cheap Jaycar woofers do work well with that closed box method.
These tho really need a large ported box, Andys experience says around 75 to 90 litres per driver.
Bass with this woofer is truly palpable and I really should do something major with it, I will as soon as I can afford a big midrange driver say a Vifa P17 or Peerless 830657 or similar