KM2

[macaroonie]

I don't know. Double then

That won't work. However if you are handing over at 15k + then the gross power envelope will not be that huge. Some of the AC and Fountek drivers rate at 60 watts. A single driver should be fine.
If you use a horn you should have ample spl.

[JeffW]

Some of the ScanSpeak dome tweeters have sensitivity of 95 dB. If you attenuate the horn back this this alternative would work. A small diameter dome or a ring radiator type with dimple will have improved dispersion at high frequencies.

The other thing you can do is move by the dome in a small wave guide.

I think it was badman who did some testing of dome tweeters in small waveguides, so I mounted a ScanSpeak 9700 into a little 1" Parts Express waveguide. Holy smokes, that thing came alive - way too much for the little 2 way I was planning, but a fun test.

There are also some well regarded beryllium dome tweeters out there, SB and ScanSpeak both make some I think, if the OP wants Be

[Anti K]

That won't work. However if you are handing over at 15k + then the gross power envelope will not be that huge. Some of the AC and Fountek drivers rate at 60 watts. A single driver should be fine.
If you use a horn you should have ample spl.

wait a minute, this AC G3 rates 60W, 100dB sensitivity. Or I misunderstood something.

[Anti K]

I think it was badman who did some testing of dome tweeters in small waveguides

I think it was badbadman. They are tested without waveguides IMHO.
Maybe that's why I never heard any dome tweeter I liked.

Ribbons ... graphs sometimes are almost 'boring'. Just stight lines...
Well, vertical dispersion is't good.

[JeffW]

I think it was badbadman. They are tested without waveguides IMHO.
Maybe that's why I never heard any dome tweeter I liked.

Ribbons ... graphs sometimes are almost 'boring'. Just stight lines...
Well, vertical dispersion is't good.

Here's the article, FWIW (the author posts as badman here)

http://www.enjoythemusic.com/diy/0311/supertweeter.htm

[Anti K]

Wow, look what's written here!

... or, put the 476Be in the M2, use the 2216nd in the 80Hz-800Hz decade, and /... / subs


(just kidding)

06-13-2015, 08:35 AM
http://www.audioheritage.org/vbullet...Monitor/page51

[Anti K]

Could somebody please have the (exact) dimensions of this WG

[Anti K]

​Port or Noport, that's the question.
K2 and Everests have rear ports. Why?
(i make curved back, if it makes any difference, in terms of port tuned to 27Hz)

M2 has front-mounted ports, obviously, they are used often in Theatres as well, while installed directly to the wall, same with Sub18, there is no question.

While drawing CNC files got opportunity reduce the height of monsters significally and measures overall, just inside construction went complicated.
Especially mounting long front ports.
Rear mounting allows install straight ports with ease, looking spead like DD60000.

Or go to sealed (!?) - what I get is minus 6db at 32Hz.

[Ian Mackenzie]

The M2 is a equalised bass reflex system. The K9900 and the DD67000 are not.

The later rely on the proximity of room boundaries to augment the bass extension and bass output below 100 hertz. The rear placement of the port supports this function as the rear ports are closer to the room boundaries than a front firing port.

[Anti K]

The later rely on the proximity of room boundaries to augment the bass extension and bass output below 100 hertz. The rear placement of the port supports this function as the rear ports are closer to the room boundaries than a front firing port.

Replacement of speakers is more complicated?
Or doesn't matter, front- or rearported, away from the wall there is a 'mess' at low section anyway...?
DSP room correction is a friend.

Mr. Widget, You made Yourself a sealed, measures of speaker wasn't only reason ?

[Mr. Widget]

Mr. Widget, You made Yourself a sealed, measures of speaker wasn't only reason ?

For my “Project Widget” project, since I was attempting to create an ultimate system, I mocked up everything prior to the final build.

I mocked up baffle shapes around the mid horn, relative driver placement, and I built both sealed and ported enclosures of different sizes for both the 10” TAD midbass driver and the JBL Sub1500.

For my drivers in this application, sealed was the way to go for the Sub1500.


Widget

[ivica]

For my “Project Widget” project, since I was attempting to create an ultimate system, I mocked up everything prior to the final build.

I mocked up baffle shapes around the mid horn, relative driver placement, and I built both sealed and ported enclosures of different sizes for both the 10” TAD midbass driver and the JBL Sub1500.

For my drivers in this application, sealed was the way to go for the Sub1500.


Widget

Hi Mr. Widget,

Any kind of LF correction has been applied ??

Regards
Ivica

[Anti K]

Got the internal structure in place.

Measures are not monsters anymore; If compared to the real beasts.
Maybe Fountec UHF ribbons, maybe even round shape to keep options open, vertical or horisontal.

[Mr. Widget]

Hi Mr. Widget,

Any kind of LF correction has been applied ??

Regards
Ivica

Yes.

[Ian Mackenzie]

Replacement of speakers is more complicated?
Or doesn't matter, front- or rearported, away from the wall there is a 'mess' at low section anyway...?
DSP room correction is a friend.

Mr. Widget, You made Yourself a sealed, measures of speaker wasn't only reason ?

The point is if you are going the diy route you are more likely to achieve the optimal bass response with some low frequency EQ using a 2216nd woofer. Being reliant on enclosure placement with a rear port to achieve optimal bass is very much a hit and miss affair. You might sacrifice imaging for good bass or visa versa.

The 2216nd will take a stack of power and has ample cone excursion for electrical EQ.

In my own experience using room boundaries to obtain a satisfactory bass response requires movement of the woofer in a 3D axis. Moving an enclosure back and force and or sideways can work but the distance of the woofer from the floor can also effect boundary coupling and impact on higher frequencies.