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The Klipsch Audio Community


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About CANT

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  • My System
    Technics SL1800 w/M5G arm & wires
    Nakamichi MR2
    Marantz CD5005
    Marantz NA7004
    McIntosh MX117 *Phono Only
    McIntosh C27
    McIntosh MC502
    Technics SU9070 *backup
    Technics SH9010 *backup
    Nikko EQ 20 *backup
    Nikko CO 23 *backup
    Nikko Alpha 220 *backup
    Klipsch KPT-325

    Technics SL1301
    Marantz 1070
    Klipsch Heresy Inspired 2-way (K703/D202Ti & K28E)

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  1. Unfortunately, the number of revisions made to the CF line complicates this line of questioning... Obviously changes were made to nearly EVERY aspect of this line over it's brief existence but what was the difference from one rev to another and what was the purposeful/functional difference between a 63 and a 64, only a Klipsch employee/engineer can/could say. Until something is said, I stand by all of my previous statements... It makes ZERO sense to me, from a production/manufacturing stand point to have 2 different drivers and most of what I see in Klipsch pattern of parts usage says it likely wouldn't make sense to them either. Klipsch likes reusing parts and that's generally a good business practice. Example: The K52 is the same K52 used in a slew of Heresy's, Cornwall's, Quartet's, Forte's, Chorus', KI/KP?KPT Models... over MANY years.
  2. Not sure if this would apply to the 904 or not but I thought that I would throw it out... I currently have a set of 325’s that I use for stereo/tv duty in my den and I had, for awhile, been struggling the best setup... in any case, I’d found having by the horns pointed too directly toward the general listening area lead to things feeling a bit too forward/direct for music... I’d tried adjusting toe angles and even pointing the horns down to reduce ceiling reflections but the magic actually started to happen when I angled them up?! I currently have them set to project about 32in above whereabouts my ear would rest and I couldn’t be happier. Could be room loading/acoustics but it seems a testament to not always following general assumptions on shooting everything straight at you.... Room is smallish at 13’w and 17’d. Do to constraints the speakers are only about 6’ apart. Again, this is just something to throw out there...
  3. Ok, so what are the advantages or disadvantages to leaving V3 & V4 in circuit if the the tone controls have been removed? The entire front end of this amp was corroded beyond deoxit-ing so if it is going to survive in any capacity, it will be as a power amp... I did buy a pair of 7247 for the V5 and V6 positions to get a rough ideal of its sound but I am not trying to go nuts on parts in case this thing is really only worth its iron. I’ve seen a mod on another site that would mod V3/V4 for 12ax7 duty but it doesn’t make a ton of sense to me because it mostly modifies the already ax side of the 7247? I’ve also been looking over some of the over EICO schem that don’t use this tube like the ST84, HF85 and 81 just to get an idea of their thought process. I guess I was thinking worst/best case it could run similar to a Dynaco ST35 just off the single 7247 but maybe I am misguided.
  4. They generally just request that you supply the SN of your speakers... https://support.klipsch.com/hc/en-us/requests/new I've ordered several replacement parts from them
  5. I recently picked one of these up without tubes (for cheap) and was planning on running through it this weekend if I have time... My question is related to the 7247/12DW7's... I don't have any... but I do have AX's, AT's and AU's... what is my best choice for a sub for testing purposes? I've looked around online for help but many/most of the info I can find tends to lead to privately hosted links that are long dead. Side notes: My love of old switches and pots lives on (sarcasm) so expect most of them to be removed. I did located a gentleman who removed the tone control function (see ST40-mod-A4) though he left the Hi and Lo filter switches that I have no desire to use. This this amp is definitely no show pony so I am unconcerned with keeping it original. Thanks again for any help you can provide
  6. Just so that this thread isn't left completely open ended... the issue with the one amp I was having was the Damping Factor Switch, which I ended up removing from both amps. Everything appears to be operating great now!
  7. I'd like to thank everyone who's replied so far for trying to help... Work has been very busy and I've had and still have some family matters on my plate so this is realistically on the back burner for now. The other night I did tinker a bit just to clear my head of other things.... Currently both amps are now set to use C28 (0.033uF) going to V4 as the input. I have also completely disconnected the front end of the amp. It's hard to explain on the schematic but they actually made this rather easy on the chassis. This disconnected R57, removing C3, all the preamp heaters and the incandescent light on the front panel. I partially did this because it is near impossible to check the voltages or anything else in the power amp section without separating the 2 halves of the chassis. I also wanted to give this idea one more shot after realizing the amp I originally tested was not functioning properly. Well, on the good amp this setup sounds amazing, even on just an ok test speaker! Previous there was, what I would consider, a tremendous amount of noise. Currently the amp is so quite I didn't think it was working the first time I turned it on to test it. The malfunctioning amp makes some noise on power up but does quite down now and has about half of the output of the good one??? There are so few components left I am curious what would likely cause this? I did swap both the 6BA8A and the 5Y3GT since they were purchased as NOS but may not have actually been but the problem persisted. I guess I will check everything else when I eventually have time... Side Note: since none of these Sherwoods seem to be very popular/well known I thought I would mention that I got this whole idea from another one of their models, the S4400 & S360. The S4400 was a stereo pre with a mono power amp and you could buy the accompanying S360 to make it fully stereo. I guess this wasn't a popular setup at the time because the S360 is exceedingly rare. The S4400/S360 uses a 7199 instead of a 6BA8A and 4x 7189 instead of 4x 6BQ5 or 2x 6L6 used in most S1000's but other wise seem pretty similar. I actually have a schem for the 4400 but haven't been able to get my hands on a 360. At times, 4400 owners have had an easier time getting a hold of a second 4400 or a 7189 driven S1060 to convert and use as an S360 which made me think maybe I could do that to the 1000's I had lying around and just use my own pre... S1060_schem.pdf S4400_schem.pdf
  8. Ok, so I used the tape input with its 100K to ground and placed a 0.01uF behind that with pigtail... Amp A: Disconnecting C25 (.022) from V3 pin 7 (grid) and attaching the aforementioned pigtail everything seemed to work quite nicely. The volume pots on both amplifiers are trash so it was good to see that they could be bypassed. Amp B: Disconnecting C28 (.033) from V4 pin 7 (grid) and attaching the pigtail everything worked but with much less volume and missing bottom end. After reworking this amp B to match the wiring of amp A, I notice that while the volume was better there still seemed to be an issue? The very top end of the output is distorted and still lower than amp A by a little bit? Both amp have had all electrolytic and paper caps replaced (they more or less match). They are also both running NOS 5Y3GT's, NEW matched 6L6GC's, NOS 6BA8A's and NEW 12AX7's. Any ideas on what would cause the distortion/low output? Also can some one tell me what function R54 (240ohm) and C1 (50uF) are performing? When going through the amps I notice one had a 270ohm and one had 300ohm (technically 270 + 30) in the R54 position... I have a schem for a similar Bogen MO30 that uses 200ohm and 50uF... I'v also seen schem at use nothing at all in this position... what does changing the value of the resistor or cap do? Thanks
  9. I’ve had the fewest issues with Sonicaps and ClarityCap SA/ESA/CSA... in the old Klipsch filters I tend to like Obbligato Film and Foils too... but I tend to hover I the low to mid priced area. I will some times also use Daytona .01uf film and foils as a bypass... I am not sure why but the will smooth things out at times.
  10. I’m not really familiar with Audio Asylum and when I went to check it out I would say I found it easy to navigate... I do realize that the Klipsch forum prob isn’t the best place to ask for this advice but I figured it was worth a shot? I am mostly interested from a general stand point, is it possible to jumper past the eq section? Like run a wire from one of the rca jacks straight to the loudness/volume pot? Could I just leave the other half of V3 unused? Or run a wire from the tape/monitor switch to pin 2 of V3 and throw like a 1M resistor to ground in there? Even better would be to remove C28, leave R40 and use that as the input... bypassing V3 altogether? If this were SS I would have better idea of where I could jumper in to the power amp from but I am just not very knowledgeable when it comes to tube amp design.
  11. I haven't really delved all that much into tube amplification but I have a pair of Sherwood S1000's that I've been wanting to use/try out in a stereo setup for some time... Ideally I would be looking to use them as power amps solely. The amps have a tape monitor switch that bypasses V1 (Phono Pre) & V2 (Pre/Cathode Follower) completely but leaves the tone controls and volume in place... I am curious what your thoughts on bypassing those functions are? These amps appear to have been changed/revised quite a bit over their production so it may not be exact but I have included what I feel is the closest version of the schematic I have. Thanks Sherwood-S1000-II 6BA8A 6L6 Schematic.pdf
  12. Confirmation bias is a b!tch...
  13. I didn't know that people considered the 15C an "upgrade"... I always just thought of it as a close enough off the shelf replacement for K33? Upgrade seems like a strong word? I definitely would not waste money replacing perfectly good K33's with these?
  14. CANT


    The pics aren't a branded K60M but an EV model... it was close enough... that circular bit under the screw will come out. It isolates the ring terminal from the snout/face plate and is not needed with your replacement because it is built in to the replacement Hope this helps
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