GoodSoundClub - Romy the Cat's Audio Site

In the Forum: Horn-Loaded Speakers
In the Thread: Adding one more spherical to Macondo.

Post Subject: Depending on your amplificationPosted by Romy the Cat on: 3/31/2011

I am not a huge fun of S3 for MF use as the ceramic magnet is less interesting then alnico magnet for HF applications. For the low mid, or as I call it the Fundamental Channels the HF problem that ceramic has do not manifest themselves. My Fundamental Channels roll off at 1000Hz at upper knee with 2++ order, so it would be irrelevance what kind magnet it used.

I use a single stage 6E5P to drive Fundamental Channels, it is about 1.5W, I have enough gain and power. I do not think you will be able to make S3 to go down to 300Hz, unfortunately, particularly in La-horn. The La-Horn and Tratrix are fast opening horn and then drop slop very fast, much faster then exponential. The exponential horn however are more sensitive for precession of high-pass crossover point and toss honk more eagerly if something not up to what they like. 300Hz is the frequency what I would begin to debate about slow vs. fast opening. If you will be debate it then do not forget to add a good 2/3 feet of horn length in case of exponential. In some case people do not have extra length (alignment, etc…)

I did not use S3 for upper range for a long time but I would not use any ceramic magnet for HF unless I use SS amplification. With a good SS, class A the S3 driver shall be very fine.

Rgs, Romy

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