Finally my new curved top and base Tannoy GRF's - all for me!

Made this pair completely freehand - no pre-cutting or CNC work by any timber merchant.
Just mark out - and mark with carpenters kinfe and then circ saw/ jig saw by hand and finish with belt and orbital and drum sander... It can be done but it does take ages!!!

This time I chose a clear satin tung oil rich varnish which give a mellow finish.

First up my HPD's with silver bolts



Then Mozza's Golds in them for a test.



Full length grilles at present secured by felt pads under pressure top and bottom





I have thought about having black screw heads and a chap who is interested in me making a pair of cabs for him said "would look even better with black screws"... That was yesterday, so I whizzed up 2 sets





Finally the adjustable bass tuning felt I add in the rear of the cabs...



Note - cab is upside down

All in all a very enjoyable project and these are my keepers for the time being - I am seriously prospecting making a pair of large Autographs

 

Really nice job-the black bolts work for me as does the more mellow finish;-)

 

Rob and I heard them today and they sounded great.

 

Yes, thank you Steve for having us today.

Finally got to hear real, effortless deep bass from Tannoys in those cabinets

The 12" babies were also impressive, and we might see more of that later.

 

Thanks Rob - Nice to have met you, face to name etc.

I think if you have the space the GRF's are the way to go with big Tannoys.

 

Steve,
In the case of the 12"'s, how does the scaling the cab work?
Do you have to shrink the first chamber but keep horn length, flare rate, mouth size the same? The idea of some slightly compact 12" versions is mouth watering...

 

I did some sims here:

http://www.hifiwigwam.com/showthread.php?28438-Tannoy-12-quot-monitor-gold-open-baffle

Smaller overall, including horn length, throat chamber, mouth, gave the best response...

 

Cool, I'll digest all that later.

 

Sadly the forum move has lost the attached images of the sims, but I think there's enough info to get the gist. A 20% reduction all round seems a good place to start, then really cut and try...

 

There was a compact Tannoy horn cab called the Cornetta I think, that used either a 10" or 12".

 

Never found plans for the Cornetta, the one I heard of was for the 10" drivers...

Do you have a link to any plans?

 

Small front horn/reflex cab;

http://tech.groups.yahoo.com/group/tannoy/files/Japanese Cornetta Plans/

 

Thank! Looks interesting, I suppose the horn loading will be quite limited, though...

 

Big Ears build them to order for £2500. Go to the bottom of the page in the link below:-

http://www.bigearsaudio.org.uk/speakers/vintage_tannoy_loudspeakers.html

 

They wouldn't win any beauty contests.

 

Well they are unfinished. I believe you need to let a class of creative primary school children equipped with crayons work their magic on them before passing judgement.

 

They don't really sell themselves in the raw do they, why hasn't he put up a pic of the finished item?

Back to Steve's cabs; they look fantastic as always and I WILL make some reduced sized versions for my 12" drivers.......one day!

 

Make a pair for me while you're at it!

 

Ha ha, course I will Dev, and I'll get my kids to colour them in for you too!

Seriously though, how did those CPA12 drivers perform compared to the vintage 15"ers?

I stuck some CPA5's on the kids mini system, maybe I should build some micro grf's for them .

 

I think Steve's 15"ers were more refined and more sensitive. We had to turn the volume up for the 12"ers and they had slightly brighter treble IMO, they certainly did not lack bass any more. I can live with either.