Which Tannoys, folks?

[Reffc]

Just back from the workshop. Both cabs received their 2nd coat of lacquer. The polystyrene in the pictures is just there to plug the holes during lacquering and aren't some new fangled driver design! Some pictures as promised:



Have yet to fix the edge strips which are made from Walnut. They're all ready and have had radii machine on the baffle edge. Also out of sight are the custom made baffle frames machined from a solid lump of ply (magnets now glued into place and the magnetic covers work really well. 6nr 10mm diameter by 3mm deep magnets in both the speakers and the covers are about perfect).

Some more pics:

Close up of side panel after 2nd coat of lacquer:



Rear view:



Side view:



View from a step ladder!



50mm deep plinth which protects cabinet. Its curved to the same profile but stepped in:



The cabinets just need a final slight sanding, 2 more coats of lacquer, the edge strips gluing into place, the grills finishing and the drivers and crossovers fitted in.

I reckon another 3 to 4 days. Awaiting more lacquer which won't be here until next week.

[montesquieu]

Fantasic Paul.

Though I'd be busting to have a listen long before the lacquering was finished .....

[Reffc]

Fantasic Paul.

Though I'd be busting to have a listen long before the lacquering was finished .....

I have some stand-ins to keep me going Tom, a pair of Mission 760i's sat on some plastic stools

Sounds ok, but where's my bass gone

Yes, the sooner the big cabs are insitu the better.

Still need to think of a name for them as if they perform as planned, they'll be welcomed into the RFC fold

Reference Harmony perhaps?

[realysm42]

Reference journey; its what you've been on to get here and I'm not just talking about the speaker design itself, sounds like you've been on this path for an few months at least...

[Reffc]

Spot the difference:

Before:



After:

[Reffc]

Almost there. Rounded Walnut oiled edge strips now on. 3rd coat of lacquer applied today and ports sprayed black and ready to go in. Just got the grills to finish today and the speakers are finished.

I do of course have the crossovers to rebuild but will use the one's I've got unit I can get time to build the Foo components ones. Hope you like the (almost) finished speaker. I think that the Walnut against the Ripple Sycamore works better than expected and really finishes them off well:




Its a brace of cabs!





Lacquer really brings out the depth of the grain although hard to see on the photo:






Imposing view of 65Kg of 1.28m tall cabinet!

[Tarzan]

, put the drivers in and connect up!

[The Black Adder]

When are the doors and the clothes rails being fitted?...

Seriously, looking magnificent... Yep, that is a better orientation for the inductor on the crossover. Just make sure it's glued down really well. I'm sure you will.

[Reffc]

Cheers Joe

Grills finished this afternoon and I've since spent 4 hours hunting down all the parts needed for the up-market crossovers. Had a heck of a job getting hold of good quality inductors that would fit on the PCB but finally traced some Jantzen air cored ones plus one P-core for the HF. Total bill for all the crossover components was £165 for the two, so well chuffed seeing as there's some very tasty components (including 3% Clarity ESA Caps).

I'll install the Ebay crossovers for the time being until all my parts arrive and I can build the proper ones. I found a few issues with the Ebay ones and having spoken with Mark (he's a really nice guy) who built them, it's apparent that all's not quite as it should be with them, so he's sold me a few un-populated PCBs with which to build my own. The HF inductor is the wrong value, the 47R resistor doesn't account for the original autoformer inductance ratio (green tag connected in circuit to the Orange = 1.4 times) so that resistor should be 35R, and the HF bypass cap is too high a value (should be 1.5uF). I should have done more homework before buying the one's I did but Mark built them in good faith so I haven't chased for a refund. You win some, you lose some.

Speakers being installed tomorrow so should have first impressions for you within a few days, albeit with the "wrong" crossovers fitted.

[The Black Adder]

Yep the bypass cap should be 1.5uf. I used the Russian cold war versions, it's a PLIO cap and are amazing.. better to my ears in that position than an MR.

The 47R resistor is correct or as close as can be to 50R. But with an autoformer you can take that resistor out of circuit as the autoformer on one of the settings (can't remember which) is near enough the correct impedance.