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  1. Copyrights. I have lots of videos get blocked,...

    Copyrights. I have lots of videos get blocked, then later I find they've been unblocked, then later blocked again (ELP Tank). Often they are only blocked in certain countries.

    See if this one...
  2. From AK, accompanied by over half a dozen...

    From AK, accompanied by over half a dozen "likes."

    toddalin said: ↑
    On the Ethyl Mermans with the latest revisions..., just something I cobbled together out of vintage "PA parts" and a couple...
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    I had initially figured 60 degrees based on the...

    I had initially figured 60 degrees based on the acoustic wedge foam. But that actually has 10 wedges per 30 centimeters, so is a bit off (wider than) of 60 degrees

    Actually, turns out that when...
  4. You are hearing correctly. There is ~1-1.5 dB...

    You are hearing correctly. There is ~1-1.5 dB peak at ~1kHz. I've "voiced" the speakers to be a bit hotter in this area because it brings out intelligility and is hard to totally mitigate from the...
  5. Would you know L200/300s if you heard them? If I...

    Would you know L200/300s if you heard them? If I did a video of the L200/300 vs the Mermans, A/B, at the same volume level in the same room, would you still find a way to fault it? :confused:

    You...
  6. Certainly you hear differences in the room...

    Certainly you hear differences in the room acoustics. But if you can't hear the difference in the clarity, presence, microdetail, and enunciation in the two videos, maybe try different headphones.
    ...
  7. Try a set of nice headphones. :idea:

    Try a set of nice headphones. :idea:
  8. So, Just How Do the Mermans Stack up Next to High End Equipment?

    Obviously some money invested here.


    https://youtu.be/L-CSc3zxdEs

    OTOH, I am running a regular CD through an Oppo 95 though a Yamaha RX-Z9 RECEIVER in CD Direct mode with no sub, eq, digital...
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    Rob, I came up with a new concept for the...

    Rob,

    I came up with a new concept for the Heils that you may want to try. I've found that it increases the volume by ~0.5 (measured on a Quest 2900 Type 2 meter) and adds clarity and...
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    JBL does this on a lot of stuff now, including...

    JBL does this on a lot of stuff now, including the new L100 classics (butyl rubber), though it would seem than much of this technology has trickled down from their "professional" automotive line.
    ...
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    You would want to use the N1200 crossover and...

    You would want to use the N1200 crossover and replace the existing N2400 with an N7000 between the horn and the tweeter.

    But know that the D130 was not used with the 175/horn. It was the 130A...
  12. IIRC, ther were two versions in that one version...

    IIRC, ther were two versions in that one version actually ported the woofer cabinets through ports that came through from behind the "bumped areas" (used in sound reinforcement where cabinet space...
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    I prefer the Allen key to the Fillister head...

    I prefer the Allen key to the Fillister head because I feel there is more opportunity/possibility to put the screwdriver (pressing down) through the surround than an Allen key (turning laterally)...
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    Thanks. Then a couple of these should do the...

    Thanks.

    Then a couple of these should do the trick.

    https://www.parts-express.com/parts-express-cast-frame-10-32-speaker-mounting-kit--260-776
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    Mounting Screws for a 2241

    I'm doing some work on the Merman cabinets and noticed that builder used wood screws to hold the 2241s. :eek: I want to change these to Allen keys/Tee-nuts. What is the better fit 1/4-20 or 10-24?...
  16. Your wind is our fires!

    Your wind is our fires!
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    No real noticable difference on the RTA. (Maybe...

    No real noticable difference on the RTA. (Maybe 1 dBA reduction between the suck-out and peak.)


    But the increased cabinet volume, though small, would help and there is the...
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    Knocked His Block Off

    The Mermans do females great, but there is a suck-out at 250 Hz, with a dip below and peaks above and below the dip that affects male voices. I attribute most of this to the cabinets that are made...
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    JBL 2241H 18" in 7.5 cu ft, JBL 2251J 10" in .75...

    JBL 2241H 18" in 7.5 cu ft, JBL 2251J 10" in .75 cu ft, Heil AMT with my own design "phase plug", home brew crossover with Audyn Q4 caps and 16 gauge air core chokes.
    ...
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    She Was Literally Brought to Tears!

    We have a 21 year old UCI student that comes to the house three hours a day to help out. The other day she was wearing a Taylor Swift Tour tee-shirt and I asked if she listened to music.

    She said...
  21. My understanding is that on-axis lobing is not an...

    My understanding is that on-axis lobing is not an issue so long as the drivers are located within 1/4 wavelength of each other. A 1kHz tone is ~1 foot, so 1/4 wavelength is ~3 inches. So as long as...
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    Not original and the 136 actually goes a bit...

    Not original and the 136 actually goes a bit lower, but falls off a bit sooner.

    But, there really are no 136 cones left so, there is what there is.

    If you put a 136 and 2235 on the bay, both in...
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    Not an "upgrade" :no:

    Not an "upgrade" :no:
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    I felt the 2241 was too loud so now use a 20 ohm...

    I felt the 2241 was too loud so now use a 20 ohm parallel resistor to reduce the volume and made changes to the crossovers to compensate accordingly.

    2241 is now crossed at ~320-325 Hz and better...
  25. Thread: K151 vs E155

    by toddalin
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    Higher impedience will also have a higher BL. ...

    Higher impedience will also have a higher BL. The BL is a measure of the "control" of the woofer movement with higher being tighter.

    One benefit of 4 ohm is that SS amps will make more power into...
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