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Speaker Asylum General speaker questions for audio and home theater. |
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Speaker Asylum General speaker questions for audio and home theater. |
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In Reply to: What troubles have people encounterd with Metal Drivers? posted by NEAR SOTA on May 30, 2003 at 22:17:07:
My speakers, SEAS Froy III use 2 SEAS 5" magnesium cones per side. They are smooth, detailed, kick in the bass and a little forward sounding on some software, but this is more because the designer, a friend, balanced them this way for his preferences, not because the drivers are metal. My drivers are 5" and break up around 9 khz. I've heard similar speakers with 6 1/2" SEAS mag cones that breakup aaround 5 khz. They are al;so very good, smooth, but not as articulate and not quite as dynamic as the smaller cones.
All drivers break up on the top of their bandwidth. Metal drivers usually break up at higher frequencies than p[aer and plastic for a given diameter and design, but when metal let's go it's worse than other materials. So you need to use them outside of their breakuo frequency; crosover should be an octave, better 2 octaves, below breakup and with fast slopes - they are not good candidates for 6 db/octave crossovers. And it's not a bad idea to use a notch filter at the breakup point even if the crossover is way down at the point.
With a tweeter you don't have the use of a low pass crossover to tame the breakup, so you want a tweeter that breaks up supersonic, the higher the breakup point the better. A notch filter is still not a bad idea.
By the way use of a notch filter is a band aid, a good band aid, but like all patches, you do pay a performance price. It's just that on compromise, I believe the notch filter to be worth it.
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Follow Ups
- Re: What troubles have people encounterd with Metal Drivers? - hahax 14:22:42 05/31/03 (0)
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