Jump to content

Aadams

Members
  • Posts

    1,441
  • Joined

  • Last visited

Everything posted by Aadams

  1. True. If you have library of dubstep or trap music as well as esoteric pipe organ you need the right speakers. Otherwise almost all music occurs above 40 hz and speakers that begin to roll off at 40hz are all that most folks need.
  2. Almost all of the coherence is in the tweeter and mid. I would try a working equalizer for $350. A subwoofer with software management to simplify the blending at 70hz will cost a good bit more. The specs say the Thiel equalizer provides bass boost that is almost flat down to 20hz. Those are some special 10 inch woofers if they can take that kind of punishment but it also has a 40 hz cutoff. At 40 hz, they have roughly the same extension as a Large Advent or AR 91. The lowest note on a four string bass is 42hz. 5 string electric bass is 32hz. Concert Grand Piano 28hz.
  3. Below: Two versions of Bolero that are very good, stylish, recordings made about 40 years apart. Both adhere to Ravel's instructions for tempo and dynamics,i.e. length about seventeen minutes and loudness to span the softest soft at the beginning and slowly build to the loudest loud possible at the end. Either recording will help you tweak your ear, system and listening space for dynamic range. The music begins with a single pianissimo snare drum and ends with a fortissimo orchestra. The challenge is to set your volume control at the beginning so you can hear the drum without needing to turn down the gain as the loudness relentlessly builds to the climax.
  4. No. You could use a single good quality 12 inch sub woofer instead and the Thiel woofers would be less stressed than using the original electronic subwoofer/equalizer which operated below 70 hz.
  5. I would repair it on the back side with a narrow strip of high count cotton attached with the least amount of flexible fabric adhesive possible, then dope on the front side with RoyC goop. Can't recall seeing a repair like this in the forum.
  6. Does either arrow point to the damaged area?
  7. Did you see this review? He grudgingly admits the 530 is a really good speaker but too flat for his personal tastes without equalization. Graphs show it is perfect for your application. https://www.audiosciencereview.com/forum/index.php?threads/jbl-studio-530-speaker-review.12298/
  8. I think because you wrote the following. Your intent clearly is not to preserve or restore the 2ax designed performance and appearance. Not saying your project isn't worthwhile. If you devise a credible solution that is not too complex or destructive you could have a hit on your hands. The third most visited thread on this site, with 44k views, is about modifying the AR4 to improve its sound. First is ADS 1590 maintenance and performance. Second is AR3a RESTORATION. You might include this driver as a candidate. It would be readily accepted as credible. There is plenty of speaker engineering talent here, you haven't yet heard from, that could offer advice on the electronic adaptation. When used in the AR9 or 90 it covers the 1200hz to 7000hz band, very close to what you are trying to cover. When used in the 10 inch AR92 it covers 700hz to 7500hz. https://www.midwestspeakerrepair.com/shop/home-audio/midranges/others/mw-audio-mm-2044-acoustic-research-copy-midrange/ Adams
  9. Looks like the pixie dust spreader has seen this thread.
  10. The above post would be a good beginning post for your mods and tweaks thread.
  11. These random thoughts may apply equally to other music genre recordings but my focus lately has been on Classical Music. I never thought I would rent my recordings instead of purchase them but it looks like I am trending in that direction. There are a lot of advantages but the three big ones are 1. ability to entirely, repeatedly, listen to a recording without buying 2. The option to purchase CD or Higher Res files at below CD prices, 3. The monthly access fee is less than the cost of a new release Classical CD. I haven't purchased a new CD for several months. The classical music recording industry is mostly cover bands trying to create definitive versions of music from way back. Every substantial change in recording technology spawns a wave of re-recordings of standard repertoire because the industry knows the audience will buy multiple versions of the same music in the hope that a definitive combination of interpretation, performance and engineering will emerge to replace the previous best effort. Traditionally, critics and reviewers would help steer you to the next best thing. The best streaming libraries are vast. You can do your own comparisons and discover there are real qualitative differences in classical recordings across generations of technology as well as within the generations. Some old recordings still hold up well but many recent captures for Hi Res release offer stunning quality, even at CD bit rates. That is not to say Hi Res versions are always best or even better. The incremental price for this improved listening experience is low compared to most system upgrades and can make a lot of sense if you still purchase recordings. Of course the only convenient way to play Hi Res files is to have a robust internet connection to a computer, of some kind, and maybe an outboard DAC . The entry cost is about the price of a pair of good speakers but the incremental cost of the music is low and is significant tweak.
  12. Have you tried switching the polarity of the connection at the rear terminals of one speaker cab? The LMR does not operate in the range of bass that you seem to be missing? What degree of equalization do you have? Graphic equalizer or Pre amp Bass and Treble, for example.
  13. I am not sure anyone here has an answer for you. Modifying your 2axs to sound like your Polks will not be considered an achievement on this site. You could use a 15 band equalizer and nearly accomplish the same thing.
  14. The P2200 shows up as a product of the 1970s to 1980s. Not many members here will encourage you to use an amp that old unless it has been professionally rebuilt. There are many modern 4ohm capable amps with speaker protection circuitry but there will be zero additional AR90 woofers and LMRs.
  15. You made me look. You were correct. Until the mid 1960s Jensen was known for state of the art sound reinforcement and home music systems. Altec, JBL, Bozak, Klipsch, all competed with Jensen on the high end. When the founder, Peter Jensen ,died in 1961 the company began to slide and eventually was sold and resold into oblivion. Exact copies of Jensen speakers for a variety of vintage electric music instrument applications, Fender for example., are still made an sold. https://www.jensentone.com/history-jensen-loudspeakers https://www.psaudio.com/blogs/copper/jensen-the-man-the-company-conclusion
  16. This question was addressed by @Pete B sometime last year in another thread. He surmised that one obstacle to choosing a 100hz passive crossover point for the AR9 was the already very large components used for the network @ 200hz would need to be even larger @ 100hz. Aadams
  17. A few AR9s were delivered with rubber surrounds on the 8inch. There has never been a mention of original rubber surrounds on any AR woofers up through the Vertical Series. Assuming they are installed correctly, the woofers will be less compliant at the lowest frequencies but the AR90 bass is so prodigiously strong you may not be able to hear a difference unless you had a correct 9 or 90 in the room to compare. Regarding efficiency, are you sure you don't have leaks, are you sure the white wadding inside the cabinet above the woofers has not been disturbed or removed, and are you following placement guidelines for the AR9 and 90. Adams Forgot to mention, Are you sure the woofers are wired in phase externally and internally?
  18. I have three pairs that were in same condition as your tweeters when I got them. My speakers sounded warm, luscious, rolled-off, beautifully retro, but not modern. The difference in rebuilt tweeters and merely working 50 year old originals is enormous. Freqs from 2500hz to 5khz, the last octave of musical instrument range, are all effortlessly reproduced by your midrange driver. You are missing the sparkle of the natural second harmonics from 5khz to 10 khz, added by the 3a tweeter, that your ear was originally expecting. They should sound modern, as your ear expected.
  19. Did you have the tweeters rebuilt? Rebuilt tweeters add a lot of output at the 5k crossover region.
  20. I have been watching this thread and thought you would have had a response by now. You can get the angled inner radius surrounds from Speakerworks https://www.speakerworks.com/8-inchmay-speaker-repair-kit-p/swk8adlx.htm Call them, tell them what your are working on and they will tell you if it fits. It is not a good idea to cut and glue surrounds to achieve a fit. Your woofer is an acoustic suspension design and therefore relies on the foam surround to help the spider suspend the cone. Now that the surrounds have rotted away the cone is sagging below the frame which is normal for the type. In order to get the correct foams installed with the cone at the proper height and insure voice coil centering, the safe method would be to use shims. The Speakerworks kits come with shims and the correct white glue. If you are not familiar with how to shim, there are videos on youtube and several threads in the AR speaker forum here at CSP. You could always send them out to be refoamed. You might try @Royc. Playing music through those woofers at normal levels without surrounds will damage them. Allisons were wonderful designs. The AR world benefited greatly from his ideas. Good luck.
  21. Bogden don't toss out the face plate assembly with the metal screen over the dome, you might need it later.
  22. Provided no new developments in the last few days, the answer is no. I have had one with the same problem in a box for several years waiting for RoyC to say he could fix it.
  23. If this is the style of pot to which you refer, I don't recall overheating ever being an issue in CSP.
×
×
  • Create New...