Looking for a high-end 8"-10" (20cm) midbass

[Duck-Twacy]

Maybe this 8" Flexunit is a nice compromis. however only 91 db/w/m

You can request for adjusted T/S parameters

http://www.flexunits.com/iz.asp?id=4|a|125|||

[roddyama]

Vortex,

You might think about a power subwoofer to take care of the bass below 80Hz or so. This will give you a bit wider selection to choose from. Although, high sensitivity and wide bandwidth will still nerrow your search to a only a hand full of speakers. It's more than you have now.

[Vortex]

Vigier:


BTW: 120 and 8 kHz? Why? I would suggest 200/300 Hz and 3500/4000 Hz.
Then you have all the voices through the mid-unit, and it doesn't have to be SO small to prevent standing waves/cone breakup and other annoying stuff


I don't really understand the end of it...

Let's discuss it in 3 pieces:

1) eg. 250Hz versus 120 for lower x-over freq. why better? 12db/oct. still goes higher pretty much. It means then still more mid range for the low freq. driver which I then try to choose by going for ultra high-quality sound.

2) range of the normal audible speak is the job of the high-subs and midrange of course. that's why I tried to avoid 3-way, because this is the most crital area of our ears, where because of a 3-way filter a phase shift occurs. (still confused, 2-way just sounds amazing for me)

3) 3.5K-4K is okay (versus 8)

But anyway, it will be 3-way I think. Something like the Visaton Athlas Mk-II (beautiful piece).

Let me bomb with another ideas regarding construction. Just critisize me pls... I'd like to do my best which fits my tube amp.

Probably I can get out 10W per channel from the 2A3 tubes. It's like some kind of a 50-70 watt conventional amp. I've heard one of my friend's Audio Innovations First 7W tube amp with Audio Note boxes (silk dome tweeter and 8"/20cm paper midbass) and IT WAS REALLY LOUD at a half-turned-on volume !!! Amazingly loud can these tubes perform...

but let's go back to the point... still like my old C64 ..

LOAD"high-end DIY box",8,1
SEARCHING FOR...

[Vigier]

Hi Vortex,

the reason I prefer 250/300 Hz above 100/120 Hz, is because of the excursion/distortion.
If the midrange has to go as high as 4 kHz, it will be a very small unit. It won't be able to go down to 100 Hz. The excursion will be too high.
For example the TI100 (as midrange) has a lin. excursion of 3mm (and I can tell you the mech xmax isn't very much higher).
It will go over it's lin xmax at 100 Hz with just under 2 Watt!
If you use 250 /300 Hz, you can use the full 7W. (excursion is much lower)

Grtz, Joris

[Vortex]

Aham. Right.

One another question: I like the construction of the Visaton Topas. Transmission line for the TI-100 as I see. They also made the construction of the box with exact data public.

Would this box perform quite well if I would a bit make it bigger?

To hold all of the angles and not to loose the size to size ratio, I would multiply every data given in centimeters so that finally the same box but something bigger would come out. Would it be a good idea, or shall I forget it ?

I also enlarged my father's Carlson-type box 4 years ago which was designed for 8" drivers. I resized and made it again to be able to build a 12" speaker in. It worked well, VERY WELL !

[Vigier]

Hi Vortex,

I have the issue of Klang&Ton where the article about the Topas is in.
I have no experience or knowledge about horns, so I can't helkp you with this.

Grtz, Joris