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DavidDru

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Everything posted by DavidDru

  1. Ar3 for $2,600?

    What am I not seeing here beyond that crazy high price they sold for? http://www.ebay.com/itm/VINTAGE-Acoustic-Research-AR-3-SPEAKERS/282611068645?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2055119.m1438.l2649
  2. So, those of you that have the 9's do you bi amp them? If so how do you have yours set up? Vertical passive? Horizontal passive? What gear have you used? In my case I have the Adcom GFA 5500 and am thinking about getting another. I have a few different preamps to choose from including the Adcom GFP 565, Xiang Sheng tube, and my recently purchased Citation 1. Let's hear your success stories.
  3. L710 conundrum????

    Hmm, Rob, those do look odd, including the mids and tweets. Here is my 710:
  4. Came across an exciting opportunity to pick up a somewhat rare Technics turntable the other day. It is the SP-15 table with EPA-501H arm, EPA-B500 mount on the SH-15B1 plinth combo. The plinth is a very nice Rosewood. The current cart is only a Shure M44-7 and will be upgraded. Did not include the dustcover. This professional table from 1981, was sold to consumers and radio stations. It wasn't necessarily used at the stations for playing the music as much it was used in production rooms for under voice overs etc. it weighs in at 50lbs/22.7 kilos. It is manual. Has a lot of torque and ramps up to speed immediately then brakes similarly. Specs are impressive. I got it from a local Professional Broadcast Engineer at the local PBS radio stations. He got it out of a station warehouse and refurbished it (mostly just dust and lubricant age). Thought I would share since it is a little off the beaten path. My SL-1300 is next to it in the photos to help illustrate it is a big one.
  5. M-907 to be restored

    I found a very nice original owner set of Dahlquist M-907's listed on Craigs List in a town I was heading to for business and was driving. After some research on-line, and there was not a whole lot out there, it seems the entire M line is overshadowed by the much more popular and in service DQ line. The little I was able to read on them, folks were really surprised and impressed once they heard them. That's the sort of stuff I like to be on the look out for. Sneaky good. These are a 3 way model that is somewhere between floorstanding and a large format bookshelf that came with it's own stands. For me to bother, they had to have the stands and these did. Overall they are in great shape and will not require much exterior work. The grille fabric could be replaced but that will be a bit more challenging than usual even though it is juts the modern black stuff. Each grill is trimmed on each side nicely with solid wood slats but the fabric is attached underneath them. I am sure they are glued and possibly doweled on so I will hope to get lucky and be able to pop these off once I try. Till then I will just clean them up and see if the few small holes and snags just kinda fade away once clean. These have the Advent woofer with Vifa tweets and mids. The surrounds are deteriorating and I already have replacements ready to go from Rick Cobb. the baffle is coverd with felt and I am not sure if that is for looks or for some sound reasoning. Doesn't matter as I think it is a nice touch either way. I have them hooked up and playing at low volume and even with that they really do sound nice so I am looking forward to post new surrounds.
  6. Newly acquired AR-78LS

    The car analogy is a good one. One would wonder what would have happened if AR had kept the model number going and just made changes to it over the years like they seemed to do for a while with various models (3 -3A, 2-2a-2ax etc). At some point they either felt the design changed enough to call it something else, or the marketing people finally got their way. No doubt, the 3 and 3a were the industry standard for write some time and I am sure other speakers manufacturers probably tired of being compared any time they came out with a 3-way design of similar proportions.
  7. The Quintessential AR Speaker

    Great responses above. And I will throw in my response....in era's. The AR3 established AR and defined so much for the brand and in the industry, as well as customer expectations from that point forward. The 2nd era would have to be the AR9. Both made huge statements.
  8. Newly acquired AR-78LS

    My comment was just that, a thought out loud comment and general question. Not pointed specifically at your feedback on these specific speakers ra ra. It's just interesting to me that so many other later models from AR are looked upon this way, where in general most are just 3-way designs like many other brands. I would guess it would depend on how different the drivers were at this point. The enclosure is different. Crossovers are different etc Maybe I am wondering if it's a fair thing to do and wondering if it's only because it's the same brand. Thought I would throw out the question and get people thinking and responding.
  9. Avid Model 230's here

    Went to pick up some AR9 drivers at a local sellers house yesterday and he had a pair of 230's in really good condition he is wanting to sell. Researching them they look like pretty good speakers.
  10. Newly acquired AR-78LS

    I bet those are good. So are we always going to say any 3 way with a 12" woofer from AR is a descendant of the AR3? At this point in the chain I am not sure what the 3 or 3a would have to do with a 3-way 12" design.
  11. M-907 to be restored

    Sorry for not responding earlier Pete. The amp is a Phase Linear 400 that has been rebuilt entirely to the White Oak up grade. WOPL as most refer to it as. Phenomenal. Powerful. Now found some DQ-M5's A smaller 2 way. Also very good after new surrounds.
  12. Biamping L1590 anyone doing it?

    yes. Device sits between preamp and amps. This particular one is 2 in 4 out so I can split to two amps. Connect the device to your laptop and a microphone and make any adjustment you can think of and what the computer picks up on. They have others that split more ways too. Can be used to do high level room equalization adjustments or used to divide. Or both. Once you set the settings you disconnect the computer. Look up minidsp
  13. Biamping L1590 anyone doing it?

    I am still planning on it. I picked up a MiniDSP and Umik microphone so I guess I can give it a go.I will be mixing and matching amplifiers though. Wondering if it will be okay to use my WOPL SS 250w/ch amp on teh bottome end along with my Dynaco ST70 up top for something like this.
  14. Allison CD8 Speakers

    Marc, where are you located?
  15. Intro

    Welcome to the treehouse Curt. I myself have Allison ones that I rotate in my home office, which is the system I most listen too since I am in there a good portion of the day. They ar very nice indeed but would probably still benefit from some refurbishment. I also have a pair of Al120 in storage.
  16. Venturing into new Territory

    Well, couldn't resist picking these behemoths up when they came up for a very reasonable price. First pair of speakers that the wife got on me for! And can you blame her? They are the 310AP version of the Concert Grand meaning the baffle panel was sold w/o a cabinet that the owner then installed into a wall or other custom build. The date code has these from 1960 so fairly early. They apparently came out of a church a few years ago and it looks like the custom built cabinet was done fairly close to the Bozak plans for them. There are a few key issues I am going to remedy right away and the material have been ordered including the correct batting (and curtain) and new caps around to rebuild the original N-104 crossover to the newer Tobin version with the addition of an L-pad to help attenuate the tweeter. The batting is recommended to be cotton only so I had to find a big roll of the 2" stuff. apparently the curtain, which is material that hangs top to bottom internally directly behind the drivers, can also be wool so I dug up some wool to try first in that position. Bozak seemed to go through various materials through the earliest years including some Kimsul paper insulation that I found inside these, and finally settled on Cotton materials. As with so many other 50 plus year old speakers the high frequency limitations will be present. This include the earliest X version of the tweeter array which is very limited. Original specs have it extending up to 16,000 but most say it may get up to 10,000 at this point. A later release from Bozak was a little better and can be sourced to replace these, but I am in no hurry there. Some are working on a design to incorporate a modern tweeter option. Some add super tweeters too. This also has the earliest version of the wonderful B-209 midrange drivers which unfortunately have a damping ring around the edge of the frame that have all deteriorated and now vibrate and make noise when the volume increases. I have been sourcing the the version that cam out a couple years later w/o that damn ring to replace these with. Some folks simply remove the ring and go with that but I figured if I can source the next generation drivers for a decent price, I might as well. Woofers, all 8 of then are good to go. Here are some photos for now.
  17. Venturing into new Territory

    Well, they are in the garage. I doubt they will find a home in my home. Just want to get them to their potential, see what they can do, then see if I can find someone that wants them. I guess I could put them in my office for a while, but they basically would just be lined up on the wall. A wall of sound! Fairly efficient, but that's a lot of drivers and a decent amount of power is best. I just got the replacement caps and such from Parts Express this afternoon so I hope to dive into these this weekend. Will check those old caps. Also got the replacement batting. Had to order a huge roll of 2" thick cotton and also got some wool to try for the curtain.
  18. Jam, go into you cameras setting and change whatever that particular camera identifies for resolution and image size. Anything for web or screen use can be 72dpi which is probably one of the smaller settings and of course the image size only needs to be something like 400x600, maybe a little larger to be safe.
  19. AR Restoration Meeting--1

    Have a Northeast Region meeting at the old AR headquarters!
  20. AR93's - A New Project

    Picked up this set of AR93's yesterday. All drivers are functioning and listening to them now. Not bad. In my garage and the Dynaco ST70 was in #1 position so hooked up to that for the time being. Probably be better with a little more power. A little beat up. Came with the socks off so of course the painted black particle board is rough. Should be an easy clean up and paint though since they don't need to be perfect and are covered by the sock. The top caps will need a little more attention and hopefully I will be able to smooth them out with some sanding and don't need to fab new ones. The bottom stands are plastic and are fine. I reinstalled one of the socks to get a feel for what they are supposed to look like. Of course these socks are not great and will try and figure out how to replace them. At least I have them to use as a pattern. Might be cool to go with a different color than black for a little fun. A wine or burgundy color might be nice if that material is made in something like that. I am into MCM furniture and could do something pretty cool along those lines too. Would just need to be a little stretchy and good for acoustical use I guess. The 6 8" drivers have all been refoamed at some point not so long ago and unfortunately they adhered the inside edge to the underside of the cone. huh? I should probably re-do them. ? Tweeters work.. One has the dustcap mushed in and I will try to get that straightened out. Are these tweeters considered any good? I was reading the go pretty low to match up with the frequencies of the large 8" mid range. The felt surrounding the tweeter is missing on one of them. Am I going to be able to find similar replacement material that thick? Have not gone inside them yet. Here is something I found from TT on them from a previous thread. How about the AR93 and AR94? Both of these speakers—from 1980—were true 3-way, 8-inch designs, but granted, these were notconventional 3-way designs in the sense of the AR-5/3a, etc. These were floor-standing models with 3-way crossovers, using the updated, Ferrofluid version of the 1¼-inch tweeter. These speakers were "parts-bin" engineered speakers using conventional drivers that took advantage of new thoughts on boundary issues (the "Allison Effect"), giving pretty solid bass down to the low-40Hz range (-3dB of 44 Hz), and these speakers were relatively inexpensive and could sound impressive if placed properly. The crossover frequencies were 350 Hz and 2000 Hz. —Tom Tyson
  21. AR93's - A New Project

    Got the new woofer driver yesterday, refoamed it last night and have them up and running now. Sound pretty darn good. Again makes me question a recap, but I guess I should just to reset the timeline. Now that everything works I will remove all the drivers, clean-up the paint job, do a nice job with the exposed capstone tops with maybe a piano black finish and keep looking for a replacement material for the socks.
  22. AR9 cost

    What was the big picture with the 9's when they hit the market? Were they cutting edge best of class etc? If so, go to today's similar best and see what they cost and there you go.
  23. Ar3 for $2,600?

    I have the Slant 6. Purchased for the remarkable price of $100 knowing the ribbons were in need of replacement. So for about $550 Graz tells me I have $5,000 speakers. I set of the Slant 8's sold here recently for I believe around $1,200.
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