Super High-End 3-way floor-stander

[dirkwright]

Originally Posted by dirkwright

A good and compact system might be an 8" coaxial crossed over to a separate 8" woofer at about 300Hz.

Here's an idea:
B&C 8CX21 (tweeter + midrange coaxial, crossover 2KHz where dispersion matches)
B&C 8BG51 (woofer crossed to midrange about 300Hz)

Box for 8CX21 is sealed @ 0.6 cu ft.
Box for 8BG51 is vented @ 0.6 cu ft tuned to 52 Hz. (-3dB is about 52Hz)
So, roughly 1.2 cu ft (34 liters) for the whole thing. Sensitivity of 8BG51 is 90 dB. The 8CX21 midrange is 92dB and the tweeter is 101dB, so some padding down is required.

[alspe]

Originally Posted by rob g

Small drivers pushed hard for powerful extended bass effect in small passive designs always sounds a little false and mechanical to my ears, usually bloated ill defined bass or overt punchy speaker effects but even the best examples usually fall short compared to closed box for my ears and I have heard many, many speakers (most are of course ported boxes) in all kinds of environments.

Ported bass nearly always draws attention to the box however Reflex has worked well in some large designs. I can see why ATC tend to avoid ported designs for their smaller speakers apart from the new scm25 speaker

Is there somekind of inconsistency in this? If you do not use port to assist bass performance, usually you will lose overall sensitivity and also bass driver works even harder (because of lacking helping port).
I'm also into closed designs.

[gornir]

Originally Posted by dirkwright

Here's an idea:
B&C 8CX21 (tweeter + midrange coaxial, crossover 2KHz where dispersion matches)
B&C 8BG51 (woofer crossed to midrange about 300Hz)

Box for 8CX21 is sealed @ 0.6 cu ft.
Box for 8BG51 is vented @ 0.6 cu ft tuned to 52 Hz. (-3dB is about 52Hz)
So, roughly 1.2 cu ft (34 liters) for the whole thing. Sensitivity of 8BG51 is 90 dB. The 8CX21 midrange is 92dB and the tweeter is 101dB, so some padding down is required.

I’ve done co-axials in the past, mainly with Seas drivers and to be honest they are not “my cup of tea”, so to speak.

However it looks like an interesting combination for those who like the concept.

/Goran

[dirkwright]

Originally Posted by gornir

I’ve done co-axials in the past, mainly with Seas drivers and to be honest they are not “my cup of tea”, so to speak.

However it looks like an interesting combination for those who like the concept.

/Goran

OK, just trying to help out.

It's interesting enough for me that I'd like to try it, except that I just finished a pair of speakers!

[gornir]

Originally Posted by dirkwright

OK, just trying to help out.

It's interesting enough for me that I'd like to try it, except that I just finished a pair of speakers!

That's the joy of our hobby. We always find something new and exciting to build.

Regards

/Goran

[rob g]

Originally Posted by alspe

Is there somekind of inconsistency in this? If you do not use port to assist bass performance, usually you will lose overall sensitivity and also bass driver works even harder (because of lacking helping port).
I'm also into closed designs.

Ultimately I am more interested in how it sounds subjectively to my human ears than whether you are reducing one type of measured distortion, introducing out of phase bass notes, reducing cone excursion at one particular frequency or whatever.

Acoustic suspension, closed systems sound less false to me, they add less speaker effects to the music.
However I have yet to hear a properly designed ported speaker that sounds better with the ports bunged. They have to be designed for closed box operation in the 1st place.

I think a linkwitz transform used with closed boxes is a cracking way to get great bass quality and depth at the volumes most people are likely to running their speaker systems, just not for old rockers or tecno freaks who like to crank their systems "to 11" with consistent deep bass drone.

[rob g]

Another very cool three way floorstander worthy of emulating...
Krypton³ | Amphion

[Helmuth]

Did you ever try horn midhigh transducer, there is where you will find the real highend audio nirvãna I have to be honest to you.

[gornir]

Originally Posted by Helmuth

Did you ever try horn midhigh transducer, there is where you will find the real highend audio nirvãna I have to be honest to you.

There is a Swedish proverb that says “smaken är som baken, delad” which means freely translated “the taste is as your but-cheeks, divided”

Nowadays I don’t fancy horn sound characteristics, but for 20+ years ago I built a lot of PA stuff, mainly with JBL, Beyma, RCF and Fane driver units. However the WAF factor tends to be low on that kind of designs.

Regards

/Goran

[Helmuth]

Originally Posted by gornir

There is a Swedish proverb that says “smaken är som baken, delad” which means freely translated “the taste is as your but-cheeks, divided”

Nowadays I don’t fancy horn sound characteristics, but for 20+ years ago I built a lot of PA stuff, mainly with JBL, Beyma, RCF and Fane driver units. However the WAF factor tends to be low on that kind of designs.

Regards

/Goran

My wife alway's complains about the speakers. Now with the big 50cm kugelwelle she somehow finds them not that ugly. Although she now complains other wifes find them ugly.

My horn did not sound direct good but now after optimizing the filter it is very special no horn coloring smooth spacious sparkling sound.


The gay version kugelwelle . Germans have often no taste of color IMO they also tent to do this to thier customized cars.