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Multi-Way Conventional loudspeakers with crossovers

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Old 27th January 2007, 02:58 PM   #121
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Quote:
Originally posted by FullThrottleRic


We wouldn't expect anything less
Why thank you good sir... I think

Quote:
Originally posted by ANGELILO
Very very beautiful realization

Angelilo
Cheers Angelilo, glad you liked them.
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Old 27th January 2007, 07:28 PM   #122
omega87 is offline omega87  Yugoslavia
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Shin, very nice project, indeed.

Long time ago, I accepted my friend's advice, that I've been exploiting since then, with great pleasure.

Basically, in 3 way systems, good thing to do is to manage your volumes and T-S of woofers and mids in such a way that they have same Qt's and Fs's and efficiencies with both woofer and mid drivers.
In that case, 3 way speaker practically turns into 2 way, because there is no phase (delay), amplitude, air acceleration and any other differences between the drivers at all frequencies. It gives you the possibility of seamless coupling between them at any desired frequency and with any slope, as the alignment depends exclusively on filter's phase and amplitude behaviour, which in turn, gives you the freedom to try and choose the best filter according to distortion levels in respective drivers and according to desired directivity behaviour.
You just overlap two identical phase and amplitude curves under your own terms.
So far, I haven't listened to anything better than that.

Also, if I understood right, you want to use natural rolloff of the 8" drivers to couple with subs. Get away from that, if you can. Overlapping two different phase responses is poor solution for the bass problem. You'll probably realise that IMD will be the least of your troubles in that kind of arrangement. I take that back, if you tried it before and liked it like that. I never did.

I'm proposing you this because you can order TS that you want, so try to see the problem from a new perspective and manage it differently.

The best thing would be to have the same Fs and Qts in 10", 8" and 5" drivers. The rest will be just the sweetest crossover job you've ever had, with best results you've ever had.
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Old 27th January 2007, 07:51 PM   #123
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I too use the very very good Scan Speak R2904 to tweeter

http://www.homecinema-fr.com/forum/v...71134&start=45

Angelilo
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Old 27th January 2007, 07:51 PM   #124
tinitus is offline tinitus  Europe
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Omega, you make it sound so easy

Angelilo, very handsome speaker you have made
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Old 28th January 2007, 03:43 AM   #125
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Awesome concept Shin.
Just to throw in my 2 cents, these are gonna be huge and heavy.
I don't know why you're integrating the sub into the main. Why not separate the subs and build a standalone single sub since you're crossing over so low to it? That way your mains are a simpler, smaller 3-way, and you can put your sub in a corner. 4 x XLS10s in a tower, corner loaded would be real nice.
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Old 28th January 2007, 02:23 PM   #126
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Quote:
Originally posted by ANGELILO
I too use the very very good Scan Speak R2904 to tweeter

http://www.homecinema-fr.com/forum/v...71134&start=45

Angelilo
Angelilo, your workmanship is amazing. I can tell a hell of a lot of love went into creating those.
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Old 28th January 2007, 03:16 PM   #127
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Quote:
Originally posted by David Gatti
Awesome concept Shin.
Just to throw in my 2 cents, these are gonna be huge and heavy.
I don't know why you're integrating the sub into the main. Why not separate the subs and build a standalone single sub since you're crossing over so low to it? That way your mains are a simpler, smaller 3-way, and you can put your sub in a corner. 4 x XLS10s in a tower, corner loaded would be real nice.
Hi and thanks David, not seen you around for awhile so hope you've been keeping well. I did visit your pages whilst I was looking for opinions on the C-Quenze and noticed that you'd done a revision on the Delta, swapping the tweeter. I love the fact that you ripped the veneer off the sats and started again because it wasn't quite right... we share much in common They still look stunning and now that I've read much more indepth about the XO and general ideology of the speaker I'm even more impressed. Great work.

I've been working through things and I think the folks that said "why the subs?" are right. I'm beginning to think I have thrown too much of what I want at the project and have left gaps. The real problem is internal volume, keeping the cabinets a sane size means that I have 18ltrs for the Peerless XLS10, 20ltrs for the 8inch and 7ltrs for the 5" mid. I think ideally I need at least 40ltrs for the 8" so as not to have to resort to creating a silly custom driver that basically has the cone weight of a brick with a low Fs and VAS, very low efficiency but works and extends fairly well in a small 20ltr enclosure.

If I want to keep the sub and increase the volume for the 8" then that means a rather silly 80cm cabinet depth, I did look at increasing the cabinet width but I just don't think it looks... erm... crap. I just can't see a way of having my cake and eating it after close examination.
Therefor the XLS10's will be omitted in favor of better use of the 8's and a more well proportioned cabinet, this is of course at the expense of the lowest bass but maybe that will be in the next project

BTW A fair few folks questioned the use of side firing subs to cover 15-40hz. Was it such a bad idea? I ask because the general specifics seem to be tidy, I'd like to know what I overlooked incase I decide to do something similar on future projects.
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Old 28th January 2007, 03:33 PM   #128
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Quote:
Originally posted by ANGELILO
I too use the very very good Scan Speak R2904 to tweeter

http://www.homecinema-fr.com/forum/v...71134&start=45

Angelilo
Beautiful work there
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Old 28th January 2007, 04:03 PM   #129
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Originally posted by ShinOBIWAN


Angelilo, your workmanship is amazing. I can tell a hell of a lot of love went into creating those.
Thank you
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Old 28th January 2007, 04:03 PM   #130
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Originally posted by FullThrottleRic


Beautiful work there
Thank you very much for the compliments
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