Search:

Type: Posts; User: toddalin; Keyword(s):

Page 1 of 20 1 2 3 4

Search: Search took 0.38 seconds.

  1. Note that the 18"s are completely sealed off with...

    Note that the 18"s are completely sealed off with the foam core. It costs some deep bass, but I'm thinking that cutting it away from the ports would help that.
    https://youtu.be/2NUSWBgk0-E

    ...
  2. Thinking Outside of the Box Leads to Closing the Box

    I've been dealing with a suck-out in the Ethyl Mermans ~250Hz. I get it on both the 18" and 10" (not so much on the L300s), close in frequency (adjacent band on the RTA 1/6th octave apart) and I...
  3. Replies
    17
    Views
    321

    Doesn't matter the absolute polarity of the...

    Doesn't matter the absolute polarity of the components, only the relative polarity after the crossovers that can shift their phase and it's not always easy or clear and cut. I use an RTA and look...
  4. Replies
    17
    Views
    321

    There are mistakes! From discussion here, seems...

    There are mistakes! From discussion here, seems like about 1 in 50 is backwards. I have a pair of 2241Hs and they are different in that one moves the cone out with + on red while the other goes in...
  5. Replies
    12
    Views
    1,073

    Yes, designed them myself with lots of tweaking...

    Yes, designed them myself with lots of tweaking and some dumb-azz luck due to a miswiring that sounded "right" (the black art everyone talks about).

    I don't quite understand how the 6.8 through...
  6. Replies
    12
    Views
    1,073

    Latest and Greatest! ...

    Latest and Greatest!

    http://www.audioheritage.org/photopost/data//500/medium/ScreenHunter_211_Jul_30_11_40.jpg

    Joni Mitchell doing "Woodstock" on the Ethyl Mermans. This is why I call them the...
  7. Replies
    23
    Views
    3,520

    Just have to know where to look. I used these on...

    Just have to know where to look. I used these on the Ethyl Mermans for the 16 ohm 2251Js. You can also get them on ebay if you look for Fender L-pads. Ebay doesn't list the impediance, but uses...
  8. Just a reminder.

    Just a reminder.
  9. Come See My Garden Railroad on June 23, 2019 in Orange County, CA

    Tortoise and Lizard Bash Garden Railroad (T&LBRR)

    Sunday, June 23, 2019

    1:00 P.M. – 4:00 P.M.

    Santa Ana, CA 92705

    PM for Address
  10. ~12 feet to camera and ~10.5 feet to SLM. Maybe...

    ~12 feet to camera and ~10.5 feet to SLM. Maybe just a couple dB louder than I typically listen to this song at because it makes a better recording.
  11. Guinevere by CS&N Through the Ethyl Mermans

    Guinevere by CS&N with SLM displaying the peak "A-weighted" levels for normal listening levels through the Ethyl Mermans.A standard CD through an Oppo95 and Yamaha RX-Z9 receiver. No subs, eq, or...
  12. Replies
    7
    Views
    1,005

    Another problem with the Nyquist method that I've...

    Another problem with the Nyquist method that I've never seen addressed, is sampling white noise.

    Assuming the white noise source consists of all frequencies from 20 Hz-20kHz there is more than a...
  13. Replies
    7
    Views
    1,005

    A good video, but does not address what I asked...

    A good video, but does not address what I asked about in the least (e.g., once the signal is sampled, how is that sample assigned a "1" "0" pattern and how can that pattern be mathmatically...
  14. Replies
    7
    Views
    1,005

    Doesn't even begin to explain what's going on,...

    Doesn't even begin to explain what's going on, and neither do other articles.

    Fine on the sample rate..., but what happens next?

    How is that sample quantified into a series of 1's and 0's and...
  15. Replies
    12
    Views
    1,073

    Would still come through the resistor at a...

    Would still come through the resistor at a reduced level.
  16. Replies
    12
    Views
    1,073

    Thanks Rob. I think you have the 0.9 mH as 900...

    Thanks Rob.

    I think you have the 0.9 mH as 900 mH (or such).

    Note that the 12 mfd on the Heil actually pulls it quite low into the 2251 territory. This was to get the best transition based on...
  17. Replies
    12
    Views
    1,073

    Thanks Rob! I don't think that you are...

    Thanks Rob!

    I don't think that you are considering the effects of the inductance of the 2241H (R2) on the 2251J and that it's slope is steeper than shown. This inductance seems to change the...
  18. Replies
    12
    Views
    1,073

    Truely Interesting Situation

    Truely an interesting situation.

    The inductance/impedience of the 2241H woofer is creating a second order filter for the 2251J mid. When the 2241 woofer is disconnected, the slope on the mid...
  19. Replies
    12
    Views
    1,073

    Actually, can someone model what's going one...

    Actually, can someone model what's going one here? Seems like it could be interesting.

    Thanks
  20. Replies
    12
    Views
    1,073

    Ethyl Merman Crossover Schematic

    After much listening, tweaking, changing, and even an unintentional mistake that led to the final product, this is the current crossover schematic for the 2241H/2251J/Heil AMT.

    The unintentional...
  21. According to WinISD the box is tuned to 27.15 Hz....

    According to WinISD the box is tuned to 27.15 Hz. Plots are below with 2241H in green and 2242H in white.

    One needs to recognize that the plots are based on the roll-off from the average signal,...
  22. OK, using JBLs specs of 225 liter box tuned to 25...

    OK, using JBLs specs of 225 liter box tuned to 25 Hz. But this is probably erronious and they should have specified the vent dimensions to get the actual tuning.

    Think about it..., the dynamics...
  23. BTW, there is another issue that need to be...

    BTW, there is another issue that need to be addressed and has been totally ignored. That is, what are the other drivers to be used?

    The 2242 is so efficient that you will need to use it with some...
  24. Again, WinISD optimizes the box for the driver's...

    Again, WinISD optimizes the box for the driver's T/S parameters. The 2241H is in a 10.7 cu ft box tuned to 35.3Hz. The 2242H is in a 3.0 cu ft box tuned to 50.85Hz. The 2245 is in a 7.7 cu ft box...
  25. I am letting WinISD do its own comparison based...

    I am letting WinISD do its own comparison based on whatever WinISD bases it's comparisons on.

    By program default, if nothing is changed (e.g., box size/tuning) all drivers are shown in their...
Results 1 to 25 of 500
Page 1 of 20 1 2 3 4