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New 12" Full-Range: Fane 12-250TC
New 12" Full-Range: Fane 12-250TC
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Old 23rd May 2015, 08:50 AM   #121
norman bates is offline norman bates  United States
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tomorrow.........................
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Old 24th May 2015, 04:12 AM   #122
norman bates is offline norman bates  United States
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Well. Make that Tuesday.
My center channel 250tc.

Next weekend my engineer buddy should knock a notch out to lower the presence region that is too hot, even 30 degrees off axis.

Norman
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Old 24th May 2015, 08:15 AM   #123
nigel pearson is offline nigel pearson  United Kingdom
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My OB improved by chance. Using up some green spray paint on the backs I re-did the crossover. The 12 Lta has double tags. This was enough to mount most of the crossover which is minimal. It sounds better than on tag strip. Subtle, but in the right way. Slightly more mid band control. It is by chance star ground and almost star hot. The hot being a silver plated OFC offcut about 1 1/2 inches long. As the amp is capacitor coupled I use a DIN plug to keep 34 VDC confined. The coupling is 4700 uF 1200 uF and 3 uF to the hot bar ( Quad 303 to the transistor outputs ) . The only crossover is a 3.5 mH choke to the 15 inch unit ( 5R 7 ). Then some EQ from upgraded Quad 33 preamp.

I haven't bothered going far on the midband taming. One day I intend building an active version. I will borrow my friends PA set up to the ideal frequencies and rates of cut. Until then I feel I am 90 % OK with what I have. I won't use measuring equipement as recent experiance shows it can cause more problems than it solves. It seems like taking a pill because one takes another pill. before you know it 24 pills to take. That forest stops the amplifier controling the driver. The amp never sees a direct path. What I also learned is that sound is always there if a resonance.

If active it is the salt and pepper one can add. Unlike food we can add or subtract in an instant. I will build the filters into the amplifers. That way the complexity is kept minimal . Passive where possible. I hope for a mix of valves and transistors. The bass 250 watts and the upper bass to lower treble 8 to 20 watts valve. Treble might be class A transistor. If a JLH the output cap is also the filter. The tweeter is form >7 kHz.
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Old 19th June 2015, 11:20 PM   #124
norman bates is offline norman bates  United States
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just a thougt for those of us who are bass heads..........
(still waiting for mine)

Still need eq to tame response, but this looks fun.

Click the image to open in full size.

simiar to this................

Click the image to open in full size.



Noman

Last edited by norman bates; 19th June 2015 at 11:23 PM. Reason: forgot
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Old 19th June 2015, 11:24 PM   #125
nigelwright7557 is offline nigelwright7557  United Kingdom
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Quote:
Originally Posted by nigel pearson View Post
I haven't bothered going far on the midband taming. One day I intend building an active version. I will borrow my friends PA set up to the ideal frequencies and rates of cut. Until then I feel I am 90 % OK with what I have. I won't use measuring equipement as recent experiance shows it can cause more problems than it solves. It seems like taking a pill because one takes another pill. before you know it 24 pills to take. That forest stops the amplifier controling the driver. The amp never sees a direct path. What I also learned is that sound is always there if a resonance.
This is why I prefer no crossovers in my system.
I use a pair of Fane 12-250TC with a Fane 15-600LF. They seem to work well together.
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Old 20th June 2015, 07:13 AM   #126
nigel pearson is offline nigel pearson  United Kingdom
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That reminds me of PA rigs although they are sealed boxes. I think Meyer even have angle calcualtions for each box ( and displacement ) and each venue?

I made a crude phase plug for my similar 12 Lta. It is a 4 x 1 inch foam paint roller. It is held on a 1930's style curtain spring so as to just clear the cone strung from the 12 to 6 o'clock fixings. This means I can take it off in seconds and have a standard driver. It is good enough to say how it could work. Better and worse. The original has more bight. I dare say it is too long and EQ needed. It also sounds very sweet and voices seem better. I shall repeat the idea with 12 inch wood ruler and broom handle stub. I might put a small soft foam damper between wood and cone mostly as an air seal. As far as I can see this is no worse than a standard phase plug.
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Old 30th June 2015, 04:23 AM   #127
norman bates is offline norman bates  United States
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got fane (in its speaker box today).
Should have it hooked up under tv tonight.
Hopefully take a picture and post it tomorrow.

I'd imagine at 250 w/rms that it will take a while to break in.

norman
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Old 30th June 2015, 07:53 PM   #128
norman bates is offline norman bates  United States
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Click the image to open in full size.
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Old 2nd July 2015, 06:11 AM   #129
norman bates is offline norman bates  United States
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Maybe 7hrs on it.

On floor 11' away, not much below 100hz.
Run off an rca plug DVD player into 10 band eq.
+3@30hz/60hz. -3db@120hz. -6db@1khz/2khz/4khz. -3db@16khz

Just 1 speaker.

Bryan Adams........ Good
Diana Krall wallflowers cd track 6+.......... Great
Jefferson airplane/starship hits.......... Good
"Big times in a small town"......... Great
Fight club soundtrack............. Not bad at all
Battle star Galactica............ Really good (surprising, but voices from floor)
Gun's and Roses gold CD.......... Really bad.
Frank Sinatra " witchcraft" from 50 shades movie CD........ Magical

Definitely a fun relatively inexpensive driver.
I look forward to more people playing with them.

Norman
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Old 2nd July 2015, 07:49 AM   #130
nicoch58 is offline nicoch58  Europe
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Norman tray in OB ,just a baffle under the tv big as the forniture , fs 50hz with qts .64 must work
you can simulate with Xlbaffle software
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