Recent content by Moritz Bachmann

  1. M

    PA Top with AMT

    The XO will be active, I was using a dbx venue 360 until now, but a BSS Soundweb BLU 160 is on the way to replace it. I will spend a lot of time to test different settings, XO and PEQ for sure, but still I don´t know which steps to go through to align the chassis correct, or how to tell from...
  2. M

    PA Top with AMT

    So although we are still busy with our subs we were able to do some measurements outdoor. As we were interrupted twice by sudden rain, we couldn´t test all we would like to. Also, as this is our first speaker design, we don´t know what REALLY matters in the measurements to aligning those three...
  3. M

    PA Top with AMT

    bad news: we tried many different seperators, softboard as well as birch ply, in different positions and also clamped the side walls to prevent resonances there, but still we were able to reduce the first buckling at 750Hz only... We then tried to measure the speaker open baffle- we got the same...
  4. M

    PA Top with AMT

    Hmm, I alredy thought about the correlation between max. disturbed wavelenght and the feature depth of such an diffusor... after we built and glued it into the box. our next idea is close to yours Carl, we would place dense wood plates, shaped like an open V when looked on the top view -> \...
  5. M

    PA Top with AMT

    time to update this thread, since we did a lot of development during this quarantine time. We finished our final Protoype. MTM alignment, made of 15mm poplar, braced with an Carbon- Epoxy layer outside. We desided to go with the 12in but lower the Volume to ~18L and to build the enclosure...
  6. M

    DIY DSP Solutions

    have you heard about the Aurora DSP? It started as a DYI project and they implement a lot of features the users come up with. I think I will give it a try, because it is cheap anyway. If I it doesn't fit my needs, I will use it for my livingroom. What do you guys think about it...
  7. M

    PA Top with AMT

    Thank you all for your reply, we had a lot of other stuff to do, and managed it just now to continue with our project. In the meantime, we met Bennet at the ISE in Amsterdam, which was very interesting for us. We talked a little about Josh´s Skram and the Ipals, but also a little about our...
  8. M

    PA Top with AMT

    @Peter Morris we will try this. I guess the measurement should stay quite the same... @Carl Klinkenborg So do you think one port with 100cm2 or 150cm2 (rectangular) is too small? You said yours were about 100mm (78cm2)? Did you have multiple ports?
  9. M

    PA Top with AMT

    Sorry that it took so long.. we got a little ill over here Here are some measurements of the 12" and the 10". We did a lot of tests of different setting but it didn't change the frequency responds that much. Especially the differences of the measurements of the 12" are not that big (and a worse...
  10. M

    PA Top with AMT

    Thank you all for the response, I didn´t really expect the AMT to work in the PM90/60 well- still i wanted to know your opinion. We already built a test box for the 12" (20L, tuning frequncy around 65Hz) and crossed it at 100Hz to our sub and to the AMT between 700 and 1200Hz- everythink fine...
  11. M

    PA Top with AMT

    Hey guys, although we never designed speakers by our own (we mainly built speakers with building kits), I´m trying to set up a PA System with Hi-Fi qualities together with 2 friends. "Unfortunately" we decided to go with Pro AMT´s from Mundorf, precisely the 197PP27R-7- H (see PDF below) and...
  12. M

    [FS] Lab Gruppen FP10000Q

    i'm selling two (orig.) Lab Gruppen in perfectly condition, both didn't run more than 10h. (in future we want to change our sub to 1 Ohm load, that's why they are sold) the one is with activated 10years garanty (I'm not sure if there is a problem when sold) the other one is not even activated...