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  1. ttocs

    AXPONA 2024 Who's Going?

    April 12th is approaching pretty quickly! Last year, some of us who wanted to meet up had breakfast at the hotel restaurant on the mezzanine, one level up from the ground floor at the top of the escalator in the food/bar area. They have a buffet there. It's a very convenient place to meet up at...
  2. ttocs

    DSP In Dynamo Subs & 11A/13A/15A Speakers

    The question popped into my head as to if the DSP is active always or only with certain settings active in ML subs and speakers. With regards to the 11A, 13A, and 15A, Does the stat panel ALWAYS receive a analog signal? If ARC is turned off, is the signal going to the woofers analog or does it...
  3. ttocs

    Focus C18 Stat Panel Not Working

    The stat panel has very little, or no output. This results in muffled sound, especially noticeable with voice, and is easily seen with REW sweeps which show huge drop-off between the crossover points. The blue Status LED lights up, and I checked the voltage of the power adapter to be 15VDC, but...
  4. ttocs

    Impedance Anyone?

    I finally got around to measuring the impedance of my ML stats. I've looked at various methods for doing this, but decided the easy way out was to get a Current Clamp for my oscilloscope. I'm not expecting exacting results from my low grade equipment, but it's close enough to get an idea of...
  5. ttocs

    PBK: ARC For ML Subwoofers & Masterpiece Speakers

    This is specifically related to ML's version of Built-In ARC on certain speakers and subwoofers. It only corrects up to 300Hz for Dynamo Subwoofers, and up to 500Hz for some Masterpiece Speakers. This first set of examples is with a Expression 13A speaker. I have 3 UMIK microphones setup for...
  6. ttocs

    NETFLIX App In TV's, Does ATMOS Via eARC Work?

    Just wondering if some of you who are using the NETFLIX app in your tv are getting ATMOS or not? I've read so much about the NETFLIX app being problematic with ATMOS, so I thought I'd toss this out there to find out specifically about using the tv app and eARC. I know ATMOS from Prime seems to...
  7. ttocs

    My New C18 Focus Center Speaker!

    The C18 that replaces my 9 year old Motif arrived yesterday! There's so little info about this speaker that I though I'd relate my experience with it from brand new to forward into the future (some time travel is expected). It weighs 50lbs, which isn't super heavy, but being long and narrow...
  8. ttocs

    IsoAcoustics GAIA II Isolators, My Take

    After over 3 years of wondering, and almost exactly 3 years since a pretty impressive demo, I am now auditioning the GAIA isolators. I'll just refer to them as feet most of the time, but interchangeably as isolators. I'm cautiously wading into this pool with hope that these feet do what they...
  9. ttocs

    Motif Center Speaker Was Sick

    For the last few years I've been thinking about getting a new center speaker because I figured it would easily be bested by any new speaker that might even cost less than what the Motif cost new. I've been thinking that the Motif hasn't been sounding as good, but it's been good enough to get...
  10. ttocs

    What About ZERO Autoformers?

    For the last few months I've been seeking to find what might be possible to help my Bob Latino M-125 tube amps be more comfortable with driving my Expressions such that the upper frequencies above 7kHz would be better represented. To this end I've replaced a resistor as suggested by Bob's former...
  11. ttocs

    Finding Subwoofer

    I spent most of the last week dealing with positioning and testing 3 subwoofers as the culmination of previous testing and moving. I'm posting this with the hope it can help others achieve similar results, and this is before using calibration software like Dirac etc. I've got a pair of 12"...
  12. ttocs

    Playing With Subs and Expressions

    Hoping you all are well and safe. In addition to cutting holes in walls for the ML IW speakers I bought (before being stuck at home) to replace the 4i speakers I had been using for surrounds (which will be repurposed for ATMOS duties), I've decided it's time to play with the subs. I've got two...
  13. ttocs

    AXPONA 2020 - Who's going?

    2019 was my first AXPONA adventure. I attended 2 days and was was glad I had the time to do so, lots to see and hear. This year I'm also attending 2 days, most likely Friday and Saturday. Although, now that I have a better understanding of what it's about I hope to be better organized ahead of...
  14. ttocs

    Speaker Placement for Bigger & Better Everything

    Since I'm done with speaker & amp selection I am once again tinkering with speaker placement with the emphasis on: "A centered vocalist should remain in the center no matter where I sit". This is a slight exaggeration, however, it would appear that after not too much effort it is beginning to...
  15. ttocs

    1 Amp Per Expression, or 1 Amp For Both?

    In my quest to get my mind right about possible, or probable future mono amps for my Expressions I decided to do a seat of the pants experiment. I’ve been searching for info on comparisons of stereo amps vs monoblocks and I haven’t seen anything which is an actual apples to apples test, plus I...
  16. ttocs

    Post AXPONA: You still love your ML system?

    Yes!! I attended both Saturday and Sunday and was able to experience quite a bit more than I thought I would have. Only a few listenings were very notable for me, and one was quite surprising! The surprise for me was Krell powering Alta speakers. The Alta model was a 2-way speaker with a great...
  17. ttocs

    Powered Woofer ML's and Mono vs Stereo Amps

    I've been a non-practicing supporter of mono amps for a long time, just haven't gotten there yet. I know there are exceptions, but generally monos possess qualities which I'd like to experience in my system some day, maybe soon. So my questions: Since the current crop of Martin Logan speakers...
  18. ttocs

    5-way? 3-way? Binding Posts on 13A

    The binding posts on the Masterpiece Series is how many way?? I've tried bananas, spades, and bare wire over the years and bare wire wins - until now. My amp can accept 8AWG wire through the hole in its 5-way posts, and my Vistas can handle 10AWG if you're careful. My new 13A speakers have a...
  19. ttocs

    New 13A's Arrived Early!

    Can it really be this easy?? The new speakers arrived just before lunch so I took the time to hookup. They are on the rounded (plastic?) feet they come shipped with on a wood floor. Old speakers are Vistas. I expected weak, harsh, weird sounding, etc. But I got the opposite! Immediately, they...
  20. ttocs

    I'm Gettin' Itchy for a 11A!

    I'm thinking that upgrading from Vista to the Impression 11A is gonna be happening soon. From what I've been learning about it, it's a huge jump in performance from the Vista. The main consideration I've been wrestling with for a few months has been what the 'proper' sized new speaker should be...
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