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Tarheel TJ

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  1. Fascinating insight into the state of the art 60 years ago! Thanks for posting. I love the vintage stuff, and collect it a bit. However, I'm with you Claude. The modern stuff is orders of magnitude better than stuff from 1963. In the end, I'd love to have a Paragon in my living room. They are so pretty, my wife might even allow it! I'm certainly not going to get rid of the modern stuff to get one though.
  2. Check into infinite baffle subs. They are usually build in-wall, in-floor, or in-ceiling. They require a very specific placement that may not be possible in your room (it wasn't in mine). However, if you can make it work, they offer some of the cleanest, deepest bass available.
  3. I definitely appreciate the mathematical analysis from Langston and Backfire. I would agree that horn-loading your woofers adds an order of magnitude more damping force than any amplifier can. I would also agree that a lot of the difference in what people hear in tube amp bass is a result of the interaction between high output impedance and uneven speaker impedance. For all of these reasons, and many others, I have found active crossovers to be an excellent solution. Use the big SS amps on your woofers, and then use whatever else you prefer on the mids/highs (tubes, class A SS, etc.). Seems to offer the best of all worlds.
  4. Material shortages and extended lead times seem to be affecting all industries at the moment. I deal with it every day in my business (construction materials). Most of my vendors are telling me that it will continue through the end of the year AT LEAST. I also recently ordered some drivers from Parts Express. I got 6 out of the 8 drivers I ordered. I was told the rest would be shipping by the end of the month. I guess we'll see....
  5. I built a Latino ST-70 a couple of years back. Like you, I had a great experience building it and had excellent support from Bob. I can't recommend him enough when it comes to buying a tube amp kit as a first time builder. I also had an issue with rectifier tubes. I had one blow and take out the output tubes with it. Swapped in all new tubes and it happened again! I changed brands and finally found a set that works. Have been using this set for over a year with no issues. I don't remember which brands I tried at the moment. However, trial and error seems to have solved the issue. Wish I could be of more assistance. I know trial and error is not cheap when it involves tubes.
  6. Don't have too much to offer here other than that I love the sound of my Marantz 2230. It is not paired with any of my Klipsch speakers; I have it hooked up to a really cheap pair of Yamaha 3-way bookshelf speakers in a second system. This combo sounds WAY better than the cost of components would lead you to believe. Easily 90% of the sound quality of my big Klipsch-based system at 1/10th of the cost. I am not sure what the going price is for these old Marantz units, but they definitely have a very smooth and nice sound. I paid $10 at Goodwill for mine, and then spent $90 on a rebuild kit to replace the caps and lights. It is like a brand new unit. For the ~$100 I have invested, I don't see how you could do better.
  7. I have no experience with the BMS, but I used a pair of B&C DE750TNs on some ZXPC horns for the past couple of years in a two-way configuration. Just recently switched to some Eminence drivers for better high end. The B&C drivers worked great from 400hz up. They are very robust and had no problem with the 400hz crossover point. Sounded great in the mids, but the Ti diaphragm is not the cleanest up high. If you are using them in a 3-way configuration, the highs would not be an issue.
  8. As jjptkd said, this is absolutely possible by using adapters. Though it was not a tractrix horn, I have swapped out the k400 horn, while continuing to use the K-55v. See this thread: Initial impressions were good. However, the problem with this approach, which you will see in the thread, is that the K-400 (and k-500, k-700 presumably) was very carefully designed to work with the k-55v. PWK used the "pattern flip" effect that results from the loss of directivity that the K-400 experiences to complement the natural frequency response of the k-55v. They are engineered so that the directivity loss occurs right around the point that the frequency response of the k-55v starts to drop. This keeps the on-axis frequency response relatively flat. If you put the K-55v on another horn that does not have this property, it will require EQ.
  9. Sounds like a nice upgrade! With multiple subs and an acoustically treated room, you should be getting really good results. The extra amplifier power won’t hurt either.
  10. I have a 2230 as well. Mine crackles a fair bit on startup. I usually turn it on with the speaker selector turned to “off”. Let the amp settle for a minute or two and then turn the speakers to “on”. As others have mentioned, deoxit on the pots also helps. If you are so inclined, you can get a full rebuild kit from irebuildmarantz.com . I just got started rebuilding mine last week. It will be like a brand new unit when done. You will need to have some experience soldering parts to circuit boards to do this yourself.
  11. I can only speak to the MiniDSP, as I have never used a Xilica. I find the MiniDSP software plugin (I am using 4x10HD) to be extremely straightforward and easy to use. There is definitely a learning curve to getting good results with it, but the software itself is very easy and intuitive to use. I got decent results right off the bat, and really, really good results after a few months of trial and error. Now I can setup a speaker or swap a component and have it perfectly dialed in after an hour or two of measuring and adjusting. The basic MiniDSP ($99) is 48kHz, but the MiniDSP 2x4HD ($199) and the MiniDSP 4x10HD ($499) are 96kHz. I hear the 48kHz versions have a somewhat higher noise floor, but I have never tried it myself. I find the noise floor to be very quiet (non-existent to my ears)and sound quality to be very good on my 96kHz version.
  12. Sounds like you are getting some really killer results. Congratulations! I would love to see some photos of what you are doing with the foam, fiber wool and rock wool. Post some pics when you can.
  13. Thanks for your insight into linear phase filters, it is a fascinating subject. Could this problem be solved by also delaying the video signal? It wouldn't work for video games, obviously, but it should work for movies/video, right? What hardware are people using to incorporate FIR filters into their hi-fi system?
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