InConcert Duke

[Hondasnl]

After very satisfying experiences with my previous InConcert Miles (https://www.diyaudio.com/community/threads/inconcert-miles-2022.387606/ )I like to built also the Duke version in the future.

In Concert Duke

This is THE smaller great powerful brother of Tangen's very powerful InConcert Miles.
The difference is that it has 12" basses and the same plate tweeter, but without the horn.
This is going strong with little effort.

Very nice Beyma 12P1000Nd with its relatively large dust caps and ribbed cone.
The TPL150B also, like the Miles, in a shielded separate room to prevent any unwanted influences from the bass room.

It is a 2.5-way construction, with the bass playing full tones (unfiltered) while the lower bass has a partial filter (LP).

Also play very very well, very powerful and dynamic.
The depth and efficiency of the bass is comparable to that of the Miles.
This by increasing the volume from 77 liters gross to 100 liters net and by optimally adjusting the round ports.

The Duke plate tweeter works in better working conditions up to 1200 Hz than that of the Miles (up to 900 Hz).
This Duke will play a great game with the Miles.

Cabinets thoroughly executed in black and clear HD MDF in combination with solid Oak.

Damping completely 42mm Pritex on behalf of the baffle in combination with 8mm self-adhesive felt.

Specifications:

Drivers: 3x
System: 2.5 way
Power: 1800 W continuous pink noise (ref AES2-1984 standard)
Sensitivity: 98 dB for 2.83V
Frequency response: 30 Hz to 25 kHz
Frequency response: 40 Hz to 20 kHz +/-2 dB (measured at 2 meters)
BR tuning: 45 Hz

Nom. impedance: 4 ohms
Recommended amplifier power: 1W or more.
Recommended listening distance: 2 meters or more.


Volume bass: 100 liters Net
Dimensions: 1050 x 350 x 550mm

Bass - Middle Bass: Beyma 12P1000Nd
Tweeter: Beyma TPL150B

 

[Hondasnl]

Some modifications for the cabinets.
Ports now tuned at 50Hz but can be changed later if necessary.
Starting soon with this project .

 

[maximax77]

I am curious about the 4-way speakers in the renders above - are these documented anywhere?

 

[Hondasnl]

Hi yes: https://www.diyaudio.com/community/threads/re-built-vifa-basis-95-2023.395894/page-9#post-7490956

 

[Hondasnl]

Today I'll make a start with building The Duke .

 

[Hondasnl]

The begin. All panels (except the Oak panels) sawn.

 

[Hondasnl]

First steps of the construction process .

 

[Hondasnl]

Some progress .
It goes very well

 

[Hondasnl]

.

 

[Hondasnl]

I already prefabbed the filters few months ago.
Now further with the massive Oak wood panels.
Nice and easy to built speakers, I like it!

 

[Hondasnl]

A nice little modification concerning the bass ports.
I like to use the Jet Set 100 for this project.
Also easy to adjust later if necessary.

 

[Hondasnl]

Yessss! Some Progresssss!

Note: Sand will be added later via holes at the bottom of these cabinets and after filling closing properly.

 

[Hondasnl]

I'm thinking on repositioning the ports to the side walls of the cabinets on different heights and cabinets mirrored.

 

[Hondasnl]

Yesterday and today I love to work on these powerfull beauties .

 

[Hondasnl]

Nice weather here in The Netherlands to spent some time in house .

 

[Hondasnl]

Today I mounted the backside panel .

 

[Hondasnl]

Yesterday I mounted the side walls of the first bas/mid cabinet.
Oak panels a little bit bigger so that I can later perfectly sanding it to the black MDF panels.
Very strong and solid cabinets and not too heavy!

This morning I mounted the side walls of the second bas/mid cabinet.
Now drying at least 6 hours.
Very nice .

 

[Hondasnl]

Today I also cutted the 42mm Pritex with my lovely knives.
With a very cheap but very good en sharp meat knive that I bougth during my visit in Vietnam Saigon couple of years ago.
And a very very nice lovely high quality and very expensive knife from Japan .

 

[Hondasnl]

Again.

What a very very nice and strong combination of drivers is this.

I defenately like PA drivers very very much.
Sooo much output power with less input power to control them.
And again the sound is fabulous, very very dynamic, deep and detailed.

InConcert Duke.
Also a very nice design by Stig Erik Tangen.

Now playing with them into my own jacket.
Again highs and lows designed and put in seperate cabinets according the previous built InConcert Miles.

Almost ready.
Finishing the aluminium feets for the Top Cabinets.
Finishing the base plates for the Bass Cabinets inlcuding the aluminium feets.

Utill switching from 2023 / 2024 I listening to these little giants with a very very big smile.

To be continued.

 

[Hondasnl]

To be continued.