Yes, but I think I will have a one part baffle, will see.
Very simple (for the start) with an inductor (low pass) for the woofer and a capacitor (high pass) plus attenuation for the FR.
I will keep you informed... but today I'll have a surgery, so first things first
Many thanks and good luck with the surgery!Yes, but I think I will have a one part baffle, will see.
Very simple (for the start) with an inductor (low pass) for the woofer and a capacitor (high pass) plus attenuation for the FR.
I will keep you informed... but today I'll have a surgery, so first things first
Thanks!
I used the factory diagrams and made the frd and zmr files, following the xo in XSim, so will see.
And I will make measurements too in order to tune/tweak the thingie.
the factory diagrams are for infinite baffle measurements, which your OB will not. They will behave very differently from those measurements, especially in the lower area where you will probably put the XO.
Yes
And now... the doctors are waiting 😵
Yes, sure, just wanted to start somewhere. It's part of the fun 🙂
And now... the doctors are waiting 😵
I'd love to test, but I doubt the SB20 will reach 150Hz on OB. Post 199 says it starts dropping at 250Hz, which is more reasonable for an 8" on OB. I'd probably go up to 350Hz as XO point, so the SB20 doesn't have to reach its limit.
I cannot see problem post 199 :the strongest response seems to be between 250 - 500 hz with a gradual drop from there!
plus an xo can be assymmetric ,elettric isnt acustic.....
plus an xo can be assymmetric ,elettric isnt acustic.....
all depend the power you will put in.... is one of xo point choices with is order
btw Sb is 200mm and Maximum Linear Excursion 11.3mm(p-p) not to sissies
btw Sb is 200mm and Maximum Linear Excursion 11.3mm(p-p) not to sissies
I am thinking about building a pair in wide & shallow boxes similar to Heco Direkt Einklang. 45 liters volume and about 400mm vide by 800 mm high and 200 mm deep. Anyone tried this? Bass reflex this time no convoluted transmission line or Voigt pipe.
Anyone that tried passive filters to correct frequency response?
Anyone that tried passive filters to correct frequency response?
Another update - I tilted the speakers back slightly using a thick book under the front of each speaker - this helped a bit with depth and perceived bass response.
I then decided to ‘treat’ the front wall by placing a 3 inch thick seat cushion (from our garden furniture that I built last year) on the front wall behind the speakers. The has made a very big difference:
1) What I perceive as a ‘cupiness’ has disappeared completely.
2) The sound stage moved backwards but also gained height.
3) bass response is considerably more full, almost to the point where I wonder if a larger supporting woofer is actually needed (bear in mind the room is small and my amp has tone controls!).
4) The sound is considerably more relaxed, intelligible and realistic and I can listen more comfortably at higher volumes.
I am guessing but I assume that the ‘room treatment’ is attenuating and diffusing the back wave which cleans the sound up in the mid and high ranges but also helps reduce back wave cancellation in the bass? Whatever is happening the sound is more to my liking than it was before.
I then decided to ‘treat’ the front wall by placing a 3 inch thick seat cushion (from our garden furniture that I built last year) on the front wall behind the speakers. The has made a very big difference:
1) What I perceive as a ‘cupiness’ has disappeared completely.
2) The sound stage moved backwards but also gained height.
3) bass response is considerably more full, almost to the point where I wonder if a larger supporting woofer is actually needed (bear in mind the room is small and my amp has tone controls!).
4) The sound is considerably more relaxed, intelligible and realistic and I can listen more comfortably at higher volumes.
I am guessing but I assume that the ‘room treatment’ is attenuating and diffusing the back wave which cleans the sound up in the mid and high ranges but also helps reduce back wave cancellation in the bass? Whatever is happening the sound is more to my liking than it was before.
nice you can put a resistor in series or use a single ended amp , the tube ones can rise the qts 30% by Qes...
At what high use ? my 8" with 0.7 Qts is at 65cm to floor, a bit low but helps on bass
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I can suggest to buld a Nelson F3/2 current source amp for fullrange
https://www.firstwatt.com/pdf/art_cs_amps.pdf
Well, well, well...
I think, this speaker, in combination with the 12" Bianco, has huge potencial in an OB system.
After three foam baffle trials including the tweaking the xo and searching for the right position/distance of the driver I ended up to use an "old" baffle with a new cutout for the FR.
Tweaking/tuning only via my ears, later I of course will make the measurements too.
Oh, yes, I almost forgot it, I like VERY much what I hear, altough there is some more work to be done. And of course a new baffle will follow too. Until then I let the drivers burn in and enjoy the music. I'll keep you informed🙂
I think, this speaker, in combination with the 12" Bianco, has huge potencial in an OB system.
After three foam baffle trials including the tweaking the xo and searching for the right position/distance of the driver I ended up to use an "old" baffle with a new cutout for the FR.
Tweaking/tuning only via my ears, later I of course will make the measurements too.
Oh, yes, I almost forgot it, I like VERY much what I hear, altough there is some more work to be done. And of course a new baffle will follow too. Until then I let the drivers burn in and enjoy the music. I'll keep you informed🙂
Nice to hear. You are driving both drivers from one amp? which amp, just curious?
thanks for posting your project progress. 👀
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Looks great. Do you mind me asking what the specs are for your crossover please?
I see you use IKEA chopping boards too! I bought a job lot earlier this year - well worth the money!
Thanks for the info - very interesting. I have just finished ‘bracing’ the baffles with a frame and oiled the wood so will assemble everything, take pictures and listen tomorrow to what difference (if any) a more rigid baffle structure makes.