Hello. I am struggling to decide which of these woofers to pick for a 2 way crossed at ~1-1.4KHz. I'm specifically interested in which will handle the midrange better. Thoughts? (Tweeter is Peerless DFM 2535R00)
https://www.parts-express.com/pedocs/specs/264-1110-tymphany-sls-p830668-spec-sheet.pdf
https://www.parts-express.com/pedocs/specs/295-658--dayton-audio-sig270-4-specification-sheet.pdf
https://www.parts-express.com/pedocs/specs/264-1110-tymphany-sls-p830668-spec-sheet.pdf
https://www.parts-express.com/pedocs/specs/295-658--dayton-audio-sig270-4-specification-sheet.pdf
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Hello Good question I own and use the 830668, good for the price but an old technology driver compare to the sig270.
If you don't have problem with alu cone not like me, the sig270 should have a cleaner midrange.
The SLS830668 is a subwoofer but the midrange is good for this driver, a good bang fro the buck.
Hope this helps.
If you don't have problem with alu cone not like me, the sig270 should have a cleaner midrange.
The SLS830668 is a subwoofer but the midrange is good for this driver, a good bang fro the buck.
Hope this helps.
SIG 270 has a strong first breakup peak at 2 kHz about 8 dB above average response, also very visible in the waterfall plot (in the german HOBBY HIFI magazine). This also shows up as a H3 distorsion peak at ~700 Hz (1% at 90 dB). I would not cross this driver over above 500 Hz or so.
The SLS 830668 has slightly less severe breakup peaks above 1,8 - 2 kHz.
This is my very rough 10 cm "midfield"-measurement, also including a test with parallel notch as proposed by purifi.
The 1 kHz is probably just a "midfield" measurement artefact.
distorsion (red is H2, yellow H3, green H5):
I am not sure I would use this driver up to 1 kHz either.
But I keep thinking about doing this myself, definitely including some kind of distorsion minimizing notch circuit!
Maybe also the dayton breakup peak can be tamed similarly.
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At those frequencies you will be edging into the region of narrowing directivty before you reach breakup so I expect if you're crossing to a direct radiator you'd already be watching how fast you cross.
Even more so then 😉
The way to handle this is find the driver that matches the narrowing in a way that meets your waveguide, while not getting tangled in it's own breakup so that you can cross that out. Breakup peaks are not a problem since they can be straightened out, but only if they don't exist at the expense of other angles.
The way to handle this is find the driver that matches the narrowing in a way that meets your waveguide, while not getting tangled in it's own breakup so that you can cross that out. Breakup peaks are not a problem since they can be straightened out, but only if they don't exist at the expense of other angles.