Oh, sorry. Original Dorset xover schematic, for use as a reference. I figured it might help to know what response altering circuits Tannoy used on those drivers...
well - just post it
even if I already posted back-engineered one , it's nice to have their drawing
even if I already posted back-engineered one , it's nice to have their drawing
Sorry for the wait, here's the schematic of T185 Dorset crossover
I copied that by hand from the original print. I checked it and re-checked it, so I'm just about 100% certain that it's accurate. I wish I could find that original print...
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I copied that by hand from the original print. I checked it and re-checked it, so I'm just about 100% certain that it's accurate. I wish I could find that original print...
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naah
somethings fishy there
my xover schm is from 1004 xover also , PC Board 6620 0004/30
I have no doubt that you had your schm from Tannoy - but it seems to me that that day someone in office had a shot of two - more than usual
first puzzle is - 0,38mH in front of tweet ?
anyway - it doesn't matter to me , I'm just interested in another box for 2528 , will do my own xover from scratch
somethings fishy there
my xover schm is from 1004 xover also , PC Board 6620 0004/30
I have no doubt that you had your schm from Tannoy - but it seems to me that that day someone in office had a shot of two - more than usual
first puzzle is - 0,38mH in front of tweet ?
anyway - it doesn't matter to me , I'm just interested in another box for 2528 , will do my own xover from scratch
Bjorno's MLTL is as good as any without knowing what you plan to drive it with and to go tall without being too wide, deep ideally requires a higher Qts tuned to Fs, so your stated performance goals basically dictates a high output impedance system unless BH loaded.
So, what’s your game plan?
GM
I would stick to refurbishing the original crossovers as they perform some important eq functions ie a 6dB/0ct 'boost' and a driver specific notch filter.
Keep hold of the original autoformer which is at the heart of it as there are no replacements available unless you have them custom-wound at some expense.
These sites might be of help:
TANNOY Monitor Gold dual concentric speakers
Tannoy Speakers
tnx CD
I know these sites
anyway - there is no autoformer in Dorset xover
I posted nice pictures on Tannoy Yahoo Group
I know these sites
anyway - there is no autoformer in Dorset xover
I posted nice pictures on Tannoy Yahoo Group
In that case you're good to go I suspect.
Though I'd look for more juicy amps as Tannoys love current… lots of it.
From what I hear even DMT215s (101dB/1W/1m) sound a lot better driven with a 500w ss than with low powered amps. Headroom is your best friend here.
Though I'd look for more juicy amps as Tannoys love current… lots of it.
From what I hear even DMT215s (101dB/1W/1m) sound a lot better driven with a 500w ss than with low powered amps. Headroom is your best friend here.
You’re welcome!
Hmm, ~12” x 14.25” x 85” i.d. = 8.41 ft^3 net and the way I calculate a MLTL it’s only ~31” i.d. tall, so to get it up to 85” requires a theoretical ~9.5 Hz tuning with the driver ~55.5” i.d. + material thickness off the floor since CSA is too small to fold it up.
I guess what you have already come up with experimentally in MathCad is the best that can be expected of such a high aspect ratio cab for a low Qt driver, but it doesn’t look too promising except possibly with more stuffing, though of course no way to know for sure without building one, so looking forward to a review.
GM
tnx (again) GM
well , I was sort of asking for confirmation of my crummy MathCad calcs ...
as soon I manage to catch some things after 2 weeks of back pains , I'll try to arrange first test box
whadya think about possibility ....... (this question will show amount of my ignorance in horn design ) of making something as any of Spawns - The Spawn Family of Double Horns ?
well , I was sort of asking for confirmation of my crummy MathCad calcs ...
as soon I manage to catch some things after 2 weeks of back pains , I'll try to arrange first test box
whadya think about possibility ....... (this question will show amount of my ignorance in horn design ) of making something as any of Spawns - The Spawn Family of Double Horns ?
You're welcome, not that I was much help.
Ugh! Back pains, the story of my life........ 🙂
Well, the rule-of-thumb I use to check viability called for needing up to ~24 ft^3 for loading to Fs and half that for loading to ~1.56x Fs [~42 Hz], but still tuned to Fs, so didn't pursue it. IME, once it's shrunk any more, a MLTL is the better choice overall.
GM
Ugh! Back pains, the story of my life........ 🙂
Well, the rule-of-thumb I use to check viability called for needing up to ~24 ft^3 for loading to Fs and half that for loading to ~1.56x Fs [~42 Hz], but still tuned to Fs, so didn't pursue it. IME, once it's shrunk any more, a MLTL is the better choice overall.
GM
forgot to write
Dorsets passed to friend , I managed to acquire mint pair of K3809
so , going to make MLTL for 15"
😉
Dorsets passed to friend , I managed to acquire mint pair of K3809
so , going to make MLTL for 15"
😉
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