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About bfastr

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  1. bfastr

    My "New" AR-4X

    holy cow. that is one nice looking AR. if it sounds good and you can hear the highs fine I wouldn't bother doing anything to it. other than try to find its twin. Bob F
  2. bfastr

    I Have AR-5's

    Wow Sara!! that looks amazing! I am glad you were able to use the original cone. that really looks great! keep the pictures coming! Bob
  3. bfastr

    So it happend again

    You are a lucky man !! we all hope for deals like that! hopefully you get the upload sorted and can show off some pictures before and after you work on them Bob
  4. bfastr

    I Have AR-5's

    Sara, the new cap looks good, I probably would have done the same to cover the tracks of the old one anyway. gives it a nice new look Bob
  5. bfastr

    I Have AR-5's

    I am going to second ra.ra , give the originals a try. if all else fails then you can fall back to the new ones.
  6. bfastr

    I Have AR-5's

    well thats a bummer. but the woofers look pretty good. they should be rebuildable easily. So.. I would look into getting the tweeters rebuilt. I think it will be worth it in the long run. someone on here rebuilds them. Dont give up hope yet!! Bob
  7. bfastr

    I Have AR-5's

    For me half the fun is chasing down the parts and researching the job. and then enjoying the final product knowing I made them work again! As for the 4's... well, as you recall I had my dads pair that I "improved" 25-30 years ago. after returning them to stock configuration I had those old Soundspeak woofers staring at me from a shelf, along with a set of the phenolic tweeters I bought before sourcing a good set of original AR tweeters. SO.. I was cruising the 'bay and there was a set of empty AR4-x cab's calling my name. long story short I rebuilt those too but used the poly 8" and the PR tweeters. still a stock AR4-x crossover, I didnt opt to go with a 10uf cap as suggested only because I suspect at some point I will find more AR4 tweeters and put them in. for the time being they sound pretty good, the only thing of the PR tweeter is that it is a bit louder ( more efficient?) I overcome that by dialing back the tweeter level on the back. The cabinets were hand sanded using 220 and then 320 grit paper and then finished with Watco Natural Danish oil. here is a picture of my non-AR AR4-x.. for now. notice the small wood screws holding in the poly woofer in, the t-nuts are still under there waiting for a set of original woofers! And this time I didnt use RTV silicone to bond them to the box making for easy removal. The PR tweeters are a really nice modern replacement. They sound great. Bob
  8. bfastr

    I Have AR-5's

    Wow Sara!! I am jealous! another cool project. I am jonesing for another rebuild myself. I keep an eye on the local ads hoping to score another deal, something I can go look at before committing, plus, I really dont "need" more speakers. unless of course a deal too good to pass up comes along! Anyway. I would look into replacing the whole spider. if it had heat damage and became brittle whats to stop it from cracking again outside of your glue line. There appears to be a lot of places to pick up spiders. its just a matter of finding the right one. or you could pick up a pair of nice looking AR2ax Alnicos that are on the bay right now, but thats a giant expense. me personally, I would rebuild the originals. as for the grill cloth I would go for the material from 123 Stitch. its worth the extra expense. I have stapled it , and glued it to frames, I prefer to glue. I do an edge, cover with wax paper and then use a lot of small clamps and thick rulers to spread the load. do one side at a time. then when its all done. spritz it with a little water, dont have to soak it, or even get all the way to the edges, just get it moist, then dry it with your hairdryer and it will tighten right up and look like new. here are a couple picks. The AR2-ax in the pictures have original cloth, the 4's are 18 ct. Lambswool from 123 Stitch Bob F
  9. bfastr

    Back-Issue Magazine Archive Update

    Oh boy... this is going to be a deep rabbit hole I may not come out of for a long long time!! Thanks for the link !!! Bob F
  10. I like the organ amps. never heard of using them. makes sense tho. I like all the tubes. I bet it looks great at night. when I was much younger I was into building linear amps for ham radios. I loved to build them open so I could bask in the warm glow of the tubes! problem was the sweep tubes I used generally all required a plate cap attachment for the B+ and it was usually over 1000volts. got shocked more than once by open connections. I recognize the blue tooth receiver from parts express. I have one myself, its not a bad way to add BT to an old system. a little noisy at high levels, but otherwise not too dusty for under 40 bucks Bob F
  11. You may be right, all I remember were two toggle switches , looking at google images it seems maybe one was for Cr02 tapes and the other simply noise reduction, in or out. either way we thought this was the coolest setup ever. Until my friends dad got some JBL Century 100's...
  12. without getting into things, I have to agree. I miss those days, but then I suppose as we age thats a normal feeling. I do remember the day my dad brought home his first pair of AR4x speakers and we all marveled at how good they sounded for bookshelf speakers. Probably listened to something on his old Dual turntable or top loading Techniques cassette deck with the new Dolby C. all played thru an old Marantz receiver. man we had it made. !!! good times Bob F
  13. Frank, I must admit that when I first picked up the 2's they sat on the floor for a very short time, then I put them on a couple matching small waste cans, I just didnt like leaving them on the floor. And I want to say they seemed a little boomy on the hardwood so I elevated them. it seemed like a better idea to get them to where they are in line with my ears as I sit in my chair rather than play to my ankles. I am very happy with the current elevation. The stands under the 2ax's are same height as the AR stands for the 3's. The stands under the 4ax's ended up 16" to the bottoms. Only because the design of the stands looked best that high. Bob F
  14. bfastr

    Bi-wiring a pair of AR-2Ax

    Thorne, after looking at a Marantz schematic it seems to me you arent gaining anything by using the remote speaker output as a second amp to the speaker. the Marantz outputs share a common return at the connectors. and the hots, or outputs come from the same main amp. they are just run in parallel. so from what I can see you are effectively just moving the jumper from the back of the speaker to the Marantz remote speaker switch. but I could be wrong, maybe a Marantz engineer will chime in. I think your assumption that the output is shared is correct. So I don't see the advantage of breaking up the connections at the speaker ( in this case ) Bob