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tom1066

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  1. I don't know if this is exactly the same thing but check out this 11 year old thread about building the MWM bass bins: Having the corners cut off allows for more back chamber volume. As for the slot opening here is another old thread: "In my view, the restriction slot is there to form a chamber in front of the diaphragm. Classic theory is that it is possible to bump up the response at, here, 400 Hz, if you have a chamber in front of the diaphragm. The front chamber volume "spring" forms a resonance with the mass of the diaphragm" ; Not saying I understand it - here is another post from that same thread:
  2. Would the super pies work well with 402s for a two way system? These (meaning the pies) look like something I might could pull off.
  3. I 100% agree with you and I am certainly not being argumentative. I am not an expert or fanatic on these things or pretty much anything for that matter. Some people want the good-alls in and some want them out - I would say if they are replaced, just keep them. If for some insane reason you decide to sell the amp, some of the people/collectors that value the original stuff would want them and may pay more for having them. Heck if you are going to replace them just use these, the "super" capacitors that some of the Japanese restorers swear by. https://www.partsconnexion.com/arizona-film-capacitors.html Again I do not have an opinion on them and I do not condone, endorse, or swear by them. I have read some info and read about others that have used them and their enjoyment of them, but I have not heard any amps with them. And probably with my hearing loss, I doubt I could tell a difference if there is in fact a difference. Fortunately I do not have golden ears because it would mean this hobby could possibly become even more expensive.
  4. I have an 8 (not the b) that I run with Cornwalls. It is a fantastic sounding amplifier to my ears. After having it a while I put in quad of Mullard El34s and the sound improved over the tubes that came with it. I got a ton of information about the marantz 8 at AK. Here is a link about newer tubes that work well in the 8 or 8b: https://audiokarma.org/forums/index.php?threads/best-new-el34s-for-8b.880974/#post-13010239 There is a member there, crooner, who restores vintage marantz tube units. He had some recs about what to replace, what to leave, etc; I guess in an effort to not change the overall sound. Not that his suggestions were the only ones I read about or were recommended but he did a restoration of a marantz 7 tube pre-amp that was really well thought out and planned, so I felt comfortable with his recs. Here is that thread link - https://audiokarma.org/forums/index.php?threads/ultimate-marantz-model-7-restoration-thread.727823/ I know that just for starters, as mentioned above, he recommended replacing the bias supply power caps (he actually said the old top hat diodes are fine and to leave them) and the cathode resistors. He is a big fan of leaving the Good-All caps in place as well. He also recommended using EF90 tubes as a replacement for the 6BH6, they have the mesh plate and are made in Holland. Congrats on obtaining a great amplifer, I'm sure you will love it. Tom
  5. Dave - Where do you find the 25 mm BB in Nashville? From one of the big national stores or a local place? My cursory attempts to find it here in Birmingham have been unsuccessful but I keep looking around. Thanks, can't wait to see this project, esp the crossover, dsp, etc. Tom
  6. Take a look at this one on Digi-key - part number 493-14392-ND https://www.digikey.com/product-detail/en/nichicon/LLS1K103MELC/493-14392-ND/2548907
  7. Every picture I see of the back of the R-115sw shows two line ins - one for left and one for right; I couldn't open the listing for your item, so I couldn't check it. But it seems you should just be able to do the y connector at the C2 - and then follow the diagram below, replacing the sunfire sub for yours. I have done this before and it seems to work. There are also wireless options - dayton audio - https://www.parts-express.com/dayton-audio-sub-link-xr-24-ghz-wireless-audio-transmitter-receiver-system-for-subwoofers--300-580
  8. I have been looking for a while now at outdoor projectors but have zero experience with them. Which one did you choose over this?
  9. I have a 4th and a 6th grader right now - the homework load is hit or miss. Some weeks there is a lot other times there isn't. But that does seem about right for being gone a couple of weeks. It is interesting - some of the elementary schools in our same system have a "no homework policy" but others don't. Though the no homework kids I hear get a bit of a jolt when they get to the upper schools. I'm more impressed your fifth grader went to Barcelona for a tryout of sorts. Congrats - he must be quite the player. My boys play soccer but we are not in any danger of traveling over state lines much less out of the country for tournaments/tryouts, etc. What position does he play? Sorry for the questions but that is just really interesting to me.
  10. Thanks - I need to go home and measure. Not that I have the top end to go with something like this (yet) but its on my radar, always looking for the next step. And from all the good things I read about these type bass bins with the big 402 horn, it might be the final step. Lynnville is only 150 miles from me. Once these are finished I wonder if I will be able to hear them from my basement in Birmingham. I hope so.
  11. I have really enjoyed reading this thread. A quick question from a noob (who has never heard any variant of these type of bass horns) - How far away do you want to sit from these? Meaning how big of a room does someone need for super MWMs, regular MWMs, your quarter pies, etc?
  12. I'm from Alabama - I talked to you a while back on AK about 402s. That search led me to 510s and I haven't seen them for sale either. Just curious about it and where to get them. Anyway the search continues... 1066 for me is the Battle of Hastings. It was my first password for an old ATM card when I was a teenager.
  13. Sorry for my intrusion and I'm happy to do this via PM but where can you buy a pair of 510 horns?
  14. Sorry, I meant 800 Hz. Thanks for the correction. Are people using tubes or SS to power these things? I think today I am going to switch to SS and see how they do. Just curious about other peoples experiences. Tom
  15. Been reading with interest and took the plunge. UPS lost them for five days, but finally got them hooked up. And first listen has been encouraging. Couple of questions if you don't mind. Then what are placement suggestions. I saw turning the cab upside down but was just wondering. And then I'm using an ashly analog crossover at 500. I think I read thats the right setting. I do have to say it's impressive so far.
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