SDA 1A TL upgrade
nduitch
Posts: 316
I'm getting ready to upgrade the cross overs on my 1A's and have been reading about this TL conversion, why do you prefer the rdo 198 to the 194? Also has anyone ever done this on this model and what exactly is involved?
Post edited by nduitch on
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I'm in the same pinch as well. There is some more serious work that needs to be done to the crossover to make the 198's work well. I'd like to kow the diffference between the 194's and the 198's. I assume the 194's is a swap out upgrade but Ben has been working on the 198 upgrade and has it figured out. I'd love to hear feedback from others as well...
dI like to listen, tinker, listen and repeat. -
Yes me too.I have the 5.8uf sonicaps and would like to know where exactly I insert the leads.What holes?A pic would be cool...And how do the 198s sound compared to the 194?SDA-2BTL with custom IC
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Yes me too.I have the 5.8uf sonicaps and would like to know where exactly I insert the leads.What holes?A pic would be cool...And how do the 198s sound compared to the 194?
http://www.polkaudio.com/forums/attachment.php?attachmentid=26710&d=1186358580"He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche -
If these cats say the TL upgrade is worth it, do it. They have been there done that.
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Face ,I have the blade /blade version.Does that matter.I remember reading a post by F1nut that you have to use the H hole or some suchSDA-2BTL with custom IC
Adcom 565 monoblocks--Monarchy Audio M-10 preamp
Theta Data Basic Transport--Stello DA100 Signature DAC--Camelot Dragon Pro2 MK III
Harman Kardon T-55c TT
DH Labs Q-10 Signature Speaker Cables With Furez silver plated copper bananas
Revelation Audio Labs Prophecy Cryo-Silver Reference AES/EBU
Revelation Audio Labs Prophecy Cryo-Silver i2s digital cable
4 Furutech FP-314Ag with FI-11cu Plugs/FI-11AG IECs--- Power Cords
DH LABS REVELATIONS ICs-amps
Revelation Audio Labs Paradise cryo-silver ICs-Source to pre -
I was under the impression that the HF circuit of the 2A(b/b) and 2B(P/B) were identical and that the mod should work for both. Just bypass the 2.7ohm resistor with your 5.8uf cap and you should be golden."He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche
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I was under the impression that the HF circuit of the 2A(b/b) and 2B(P/B) were identical and that the mod should work for both. Just bypass the 2.7ohm resistor with your 5.8uf cap and you should be golden.
Aren't we talking about 1A's? -
Sorry, I was answering fbm211's question.
There is no official TL mod for the 1A."He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche -
I was under the impression that the HF circuit of the 2A(b/b) and 2B(P/B) were identical and that the mod should work for both. Just bypass the 2.7ohm resistor with your 5.8uf cap and you should be golden.
The 2A and 2B are slightly different with the 2A having an extra 2.7 ohm in line with the inductor. The 2B(b/b) and the 2B(p/b) use the exact same components."The secret of happiness is freedom. The secret of freedom is courage." Thucydides -
Quoting F1nut in another thread:
To do the "TL" upgrade do as above adding a 5.8uF Sonicap (custom value) in the C5 position, running the one lead into the H hole and the other lead into the C5 hole closest to R2.
EDIT: One thing to note is that on my crossovers, the H hole was covered up by the hot glue from the small corner inductor. Carefully pry the glue off to expose the H hole.SDA-2BTL with custom IC
Adcom 565 monoblocks--Monarchy Audio M-10 preamp
Theta Data Basic Transport--Stello DA100 Signature DAC--Camelot Dragon Pro2 MK III
Harman Kardon T-55c TT
DH Labs Q-10 Signature Speaker Cables With Furez silver plated copper bananas
Revelation Audio Labs Prophecy Cryo-Silver Reference AES/EBU
Revelation Audio Labs Prophecy Cryo-Silver i2s digital cable
4 Furutech FP-314Ag with FI-11cu Plugs/FI-11AG IECs--- Power Cords
DH LABS REVELATIONS ICs-amps
Revelation Audio Labs Paradise cryo-silver ICs-Source to pre -
Quoting F1nut in another thread:
To do the "TL" upgrade do as above adding a 5.8uF Sonicap (custom value) in the C5 position, running the one lead into the H hole and the other lead into the C5 hole closest to R2.
EDIT: One thing to note is that on my crossovers, the H hole was covered up by the hot glue from the small corner inductor. Carefully pry the glue off to expose the H hole.
I believe you're quoting me there, quoting F1
Have a look here for my 2B upgrade:
http://www.polkaudio.com/forums/showthread.php?t=62106Good music, a good source, and good power can make SDA's sing. Tubes make them dance. -
Guys, I had to wire it up that way to complete the circuit. I would advise you check your own crossover board to see what needs to be connected where.Political Correctness'.........defined
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