• The move to the new server is done. There are some software and database maintenance updates in process. This has us passing the hat around to help out. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html

Scored some cool Richard Allan vintage fullrange!

audiozaz

audiozaz

rtfm!? - tl;dr
They were in homemade box, rather crude ones, along with 3 3inch cone tweeters each.

1002008.jpg


1002009.jpg


1002012n.jpg


1002017w.jpg


10 inchers, about 7.5 inch cone, nice treated accordion cloth surround, in very good shape overall, just small bits of wood and plastic stuck to the surrounds, seems removeable. Nice cast frame, powdercoated. And I love the binding posts, instead of cheap connectors.

Can't wait to measure T/S parameters and find something to do with'em!

az
 
Register to hide this ad
I looked quickly around the web and these seem to be well thought of. Apparently quite sensitive, at around 97dB/W/m; Fs around 48Hz and Qts 0.33. We'll see what my tests yield; if anything like the above, I'm stoked! :D

az
 
JBCobra said:
Woh! Dare I say Scroe lol
Click to expand...

How dare you?! ;)

I'm happy with my recent FR findings; Philips AD9710 and now these RA, but why do I have to get lucky like that with winter at our door? (building season over for me) No, that was not complaining.... :)

az
 
Lol, the brochure mentions an 'inner tweeter' so I went back to the pi to check for a second set of binding posts... Silly me... ;)
 
Here are the T/S parameters I measured, average of the two:

Re: 7.35 ohm
Fs: 37.5 Hz
Qts: 0.54 - One driver has 0.50 and the other 0.59
Vas: 114 liters - this is fudgier to measure; I used added mass and this volume is using the cone diameter, without half of the surround, it's closer to specs seen online.
Sd: 293cm^2
BL: 7.6 N/A - extrapolated by WinISD
SPL 92.3 dB/W/m - extrapolated by WinISD

az
 
Rolf -- Do you have the brochure for the CG12T's, I have a pair of those. One is 8 ohm, the other 16 ohm. Not sure what to do with them yet. Thanks
 
Those look good! :thmbsp:


I picked up a Goodman's Axiom speaker not too long ago... it sounds pretty good. Still looking for a mate for it. Otherwise, it'll end up in a mono system.
 
CB12,CG12 and T-variants:
 

Attachments

  • Richard Allan CG12 data 1.jpg
    Richard Allan CG12 data 1.jpg
    39.3 KB · Views: 75
  • Richard Allan CG12 data 2.jpg
    Richard Allan CG12 data 2.jpg
    40 KB · Views: 71
  • Richard Allan CG12 data 3.jpg
    Richard Allan CG12 data 3.jpg
    41.5 KB · Views: 69
Michael-Otto said:
From my archive.

Michael-Otto
Click to expand...

The 2W for 96dB at 1 meter sensitivity figure in that chart is more representative of my drivers than the 97dB/W/m I've seen elsewhere.

I've started building K12 "Karlsonette" cabinets to use these and other drivers I have in. Will post about this later, when completed.

az
 
You must log in or register to reply here.
Back
Top Bottom