GaryC Posted May 3, 2000 Share Posted May 3, 2000 I have a pair of 89' K-horn running by a Sun SV-2A3 (3.5 watt) single ended triode amp with on preamp. I was thinking about biwiring the amp and also some "simple" modification or rebuilding of the x-over. I am going to keep the woofer "open" as John Albright advised and I have been reading many posts about simplifying the x-over like only Les's using Jensen PIO 3.3uf on the tweeter path and 12.9uf on sqweeker and omitting the inductor... Can someone give me a more complete, detailed advise about the "Simplest" x-over - no protection, shunt, fuse, inductors or autoformer? BTW, the stock x-over is AK-3, I guess it's "AA"? Sadly, I have emailed Klipsch for a schematic of AK-3 and got no answer and I have not seen a real "AA" or "A" diagram. Plese give me your good advice and I am not scared to try anything new. Thank you very much. Quote Link to comment Share on other sites More sharing options...
JohnA Posted May 3, 2000 Share Posted May 3, 2000 Look at this post: http://www.klipsch.com/ubb/Forum1/HTML/000419.html John Quote Link to comment Share on other sites More sharing options...
GaryC Posted May 4, 2000 Author Share Posted May 4, 2000 John: Thank you again for your help. The thread you pointed to me is extremely encouraging and I think I like to build it instead of do the modification to the stock x-over. Couple of more questions. First of all, you have told me to keep the woofer "open", and the x-over "A" has 2.5mH inductor in the woofer path (I can barely see it from your scan). Do I keep or omit it? Second, if I use a single Jensen PIO with a value other than 2uf, like 1.5uf, 2.2uf or 3.3uf, what kind of change of sound charactor I may here? BTW, after "cliped" the "elip" protection, I like the sound of tweeter now, however, the sqweeker sounds a little too lean to me. Any thing I can do to improve it? Again, sorry for these endless detailed questions, however, being totally new to the high end-14 months ago, I was still listening to JVC receiver, Yamaha satellite and sub combo and five months ago I just finished my first ever electronic project-building the Sun 2A3 amp, I do need a lot of advice from an expert like you. Best regards, Gary Quote Link to comment Share on other sites More sharing options...
GaryC Posted May 4, 2000 Author Share Posted May 4, 2000 Sorry for the mistake, John Albright. There was someone else told me to keep the woofer "open", without the inductor. Do you think it is a good idea? In the type A x-over, is there a T2A or T4A? Where can I get them? Thanks. Quote Link to comment Share on other sites More sharing options...
Al Klappenberger Posted May 5, 2000 Share Posted May 5, 2000 GaryC An upgrade transformer to replace the T2a is available from Universal Transformer. It is their part number 3619. Talk to Mark Cooper. Tell him it's the ALK Engineering upgrade. (972) 442-2233. Al K. Quote Link to comment Share on other sites More sharing options...
JohnA Posted May 5, 2000 Share Posted May 5, 2000 Gary, Al has a line on good components and a nice upgrade to the T2A autoformer. I'm sure the woofer could be run without an inductor, but PWK must have discovered it blends better with the mid using the inductor. A single element in a crossover gives a 6 dB/octave slope, not much, so the speaker depends on the the natural rolloff of the bass horn at higher frequencies. E-mail Al and be sure to orient the inductor and autoformer at right angles to each other to limit the influence of one on the other. John Quote Link to comment Share on other sites More sharing options...
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