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Old 5th May 2006, 07:53 PM   #11
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Quote:
You can change the input cap and the roll-off cap, then you'd get some sort of 12dB/oct (2nd order) filter effect.
Sure, but then as Sreten points out, I would have to adjust the REL crossover level to compensate for the reduced subwoofer bass output. However, this is probably the best idea that I have seen so far.

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If you have not replaced the electrolytic caps inside the interface box with film caps, do so.
Yes, ages ago!

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Alternately you could put some nice film caps between the amp and the speaker.
This seems to be quite impractical to me, as many microfarads are required to pass even the midrange at this impedance, never mind the upper bass.

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Also, there are two versions of the interface box - one has the "HF" xfmr coming in lower than the other by an octave or so...
Is this determined by the switch from 250uF to 50uF for the electrolytic capacitor for the high frequency transformer, or the upgrade to the medallion transformer itself?

I have tried increasing the resistor value in series with the low freq. transformer to 3 ohms, this did not reduce the lower bass much at all. When I get some time I will try the different transformer primary taps to see if that works better on the lower bass.

Thank you to everyone for all the suggestions!

Take care,
Doug
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Old 5th May 2006, 08:01 PM   #12
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Hi,
"Don't fix what isn't broken"
ESLs can reproduce really clean and undistorted bass.
Should't you just roll of subwoofer earlier ?
That's my suggestion.
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Old 6th May 2006, 01:00 AM   #13
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Oh, the sub runs off the speaker lines??

Too bad. You could open it up and make it line level?

The resistor in series reduces the highs, or so I am led to believe...

The main change in the HF sections freq roll in is/was the caps.

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