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Metlako: A Small, Affordable Two-Way Unity Waveguide
Metlako: A Small, Affordable Two-Way Unity Waveguide
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Old 14th September 2019, 08:10 PM   #41
Patrick Bateman is offline Patrick Bateman  United States
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Location: San Diego
I use these : Sure Electronics AA-AB33184 4x100W TDA7498 Class-D Amplifier Board
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Old Today, 03:35 AM   #42
454Casull is offline 454Casull  Canada
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Join Date: Jan 2004
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Quote:
Originally Posted by Patrick Bateman View Post
I think it will be difficult for Kef to "catch up" to Genelec without DSP; to me, it looks like Genelec is using FIR filters on their speaker to get those crazy-good polars.
In order from best to worst off-axis response:

Kef R300 Midrange Drive Unit Testing | Medley's Musings

Kef LS50 Drive Unit | Medley's Musings (results flawed due to non-flush-mounting)

Kef Q100 Speaker Drive Unit Testing | Medley's Musings

None of the off-axis tweeter responses shown can be fixed with FIR to the point that their polars would be similar to Genelec's; they're just too inconsistent. The R300 really isn't bad, though.
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Old Today, 01:49 PM   #43
jzagaja is offline jzagaja  Poland
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Join Date: Jun 2004
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Metlako: A Small, Affordable Two-Way Unity Waveguide
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Originally Posted by Patrick Bateman View Post
Metlako has been reliably printing in PETG but I really want to print most of them in ABS+, if possible. ABS is a nightmare to print, but the finished print just looks so much better.
Take a look on PP copolymers. Regular PP has strong shrinkage but copolymer can be good and part strong. My first printed horn, Iwata 600 in white pearl.

Next task - experiment with printed composites.
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Old Today, 10:43 PM   #44
natehansen66 is offline natehansen66  United States
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Patrick I'm starting to have good luck with ABS. No enclosure yet, and it's counter-intuitive but in areas where the print gets thin or is being supported I'm running my fan at 15%. I've settled on 245 for a print temp as well. First layer bed at 100 and ramp up to 110 after that - my Prusa has no issues with the heat. Dry filament is necessary as well with ABS. I feel your pain about getting things to fit. I'm in the modeling stage of a near full range 3 way Synergy that I hope to print in ABS and it's looking pretty crazy getting all the drivers stuck on
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