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In the Forum: Audio Discussions
In the Thread: The loudspeakers for a powerful SET
Post Subject: Do not use ribbons sooo lowPosted by haralanov on: 7/4/2010
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 Paul S wrote:
For the Reps I will use a 2,200 Hz notch filter for its peak

Paul, why don’t you try to fix the problem of the Reps driver instead of notching it? There is a reason for the peak and I do not consider the problem could be solved using rejecting filters.

 Paul S wrote:
Audaphon ribbon will come in at about 8k Hz, but 3rd order

Is that the same tweeter like this:

http://www.madisound.com/store/product_info.php?manufacturers_id=132&products_id=1557

If it is, I have to tell you I had an opportunity to make experiments with this driver. The first thing I noticed is that the driver had an absolutely horrifying tone! It doesn’t worth even $1…
The ribbon is 100% tonally blind and if the crossover point is lower than 15kHz the driver sound honky as if you speak with your nose closed, despite the big effective size of the ribbon. If you use this tweeter lower than 10kHz your system will be totally unlistenable because you cannot reproduce the proper tone of harmonics.
Think of the tweeter as a natural extension of your midrange driver – they must operate on the same principle and they must have identical materials for their moving systems. The Reps demands paper HF driver with very small voice coil and alnico magnet system - something like this:

my alnico tweeter v2.jpg

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