NC
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I can hardly wait, Wilbur! 😎
We had a curved array pair up on ear-height stands with a subwoofer last night at the disco. Although the windows were open, it was generally much quieter for the neighbours than the usual active 12-15" woofer plus horn jobbies.
We know the theory, most of the sound goes horizontally and distortion is lower. It's a good idea, IMO.
We had a curved array pair up on ear-height stands with a subwoofer last night at the disco. Although the windows were open, it was generally much quieter for the neighbours than the usual active 12-15" woofer plus horn jobbies.
We know the theory, most of the sound goes horizontally and distortion is lower. It's a good idea, IMO.
Thanks Steve ! The cabinet-maker is building a brand new workshop these days. Updates will follow "suddenly" 🙂
The owners workshop is finished, severe works is going on before X-mas:
The aluminium pipes are being casted into glassfibre / gypsum pulp.
Approx 30 kg powder (GPG-fire seal) before blended with water.
Pipe cabinet is water-sealed inside to avoid baltic birch to swell during casting.
Sealed woofer cab ( 4 x 10" pr. channel) is divided into two asymmetric chambers. The black felt is a compensation for eventually minor differences in bass cab. volume. (MagiCad tells us every thing are OK, but.. just in Bieber-case):
The aluminium pipes are being casted into glassfibre / gypsum pulp.
Approx 30 kg powder (GPG-fire seal) before blended with water.
Pipe cabinet is water-sealed inside to avoid baltic birch to swell during casting.
Sealed woofer cab ( 4 x 10" pr. channel) is divided into two asymmetric chambers. The black felt is a compensation for eventually minor differences in bass cab. volume. (MagiCad tells us every thing are OK, but.. just in Bieber-case):
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Interesting project! Great cabinets.
I'm very interested in the full-rangers used as midranges, and the use of midrange arrays above below the Raal. I happen to be considering a similar design.
What are the xo points and slopes you will use?
"Forum wisdom" suggests MTM with a large tweeter in between leads to severe lobbing. Things worsen with large midranges, and the center of each midrange array would mean an enormous center-to-center distance between midranges. I'm guessing you know of this and you also know something I don't, so I wanted to ask you about how this works in your experience.
cheers
I'm very interested in the full-rangers used as midranges, and the use of midrange arrays above below the Raal. I happen to be considering a similar design.
What are the xo points and slopes you will use?
"Forum wisdom" suggests MTM with a large tweeter in between leads to severe lobbing. Things worsen with large midranges, and the center of each midrange array would mean an enormous center-to-center distance between midranges. I'm guessing you know of this and you also know something I don't, so I wanted to ask you about how this works in your experience.
cheers
Interesting project! Great cabinets.
I'm very interested in the full-rangers used as midranges, and the use of midrange arrays above below the Raal. I happen to be considering a similar design.
What are the xo points and slopes you will use?
"Forum wisdom" suggests MTM with a large tweeter in between leads to severe lobbing. Things worsen with large midranges, and the center of each midrange array would mean an enormous center-to-center distance between midranges. I'm guessing you know of this and you also know something I don't, so I wanted to ask you about how this works in your experience.
cheers
I'm very interested in the full-rangers used as midranges, and the use of midrange arrays above below the Raal. I happen to be considering a similar design.
What are the xo points and slopes you will use?
"Forum wisdom" suggests MTM with a large tweeter in between leads to severe lobbing. Things worsen with large midranges, and the center of each midrange array would mean an enormous center-to-center distance between midranges. I'm guessing you know of this and you also know something I don't, so I wanted to ask you about how this works in your experience.
cheers
Buenos ! xo points will start approx 150 and 3500 and we will experiment with other points for optimal sound.
Crossover slopes will be according to Harsch, (we had a great experience with that).
The fullrange mids are located rather narrow on the baffle, and the RAAL-tweeter ribbon extends almost to it's rim. Domes will, by nature, be farther from the mids with less integration. Further, the array do focus against the listening chair. Crossover is MiniDSP HD followed by Dirac Live for target curve and optimizing. Adjusting- and measurement point will be performed at the listening place where the listening window (narrowing beam) is about 60cm height.
Crossover slopes will be according to Harsch, (we had a great experience with that).
The fullrange mids are located rather narrow on the baffle, and the RAAL-tweeter ribbon extends almost to it's rim. Domes will, by nature, be farther from the mids with less integration. Further, the array do focus against the listening chair. Crossover is MiniDSP HD followed by Dirac Live for target curve and optimizing. Adjusting- and measurement point will be performed at the listening place where the listening window (narrowing beam) is about 60cm height.
We had a pleasant visit from an experienced reviewer who was curious about this construction.
A review and listening impression about this project will be shown in the next issue (August?) of the Norwegian online magazine "Stereo +".
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The review fortunately appeared to be very successful, and owner is happy 🙂
The concept demonstrates the following benefits:
- Horn-like dynamics
- Exceptional pinpointing and depth, (not swelled like common towers)
- High definition including relaxed voices even at high volumes
(many coils running cool)
- Total control
The reviewer own high dollar towers himself and has broad reviewer experience (Wilsons, Piega Reference, MBL etc), he had never heard better life-like bigband (Big Phat) from any speaker before.
Well, big words, but I will encourage diy fellows to try out this technical simple concept if you consider to build a column (and tons of elbow grease).
The "but" is that you need 6 channels, active xo and DSP.
The concept demonstrates the following benefits:
- Horn-like dynamics
- Exceptional pinpointing and depth, (not swelled like common towers)
- High definition including relaxed voices even at high volumes
(many coils running cool)
- Total control
The reviewer own high dollar towers himself and has broad reviewer experience (Wilsons, Piega Reference, MBL etc), he had never heard better life-like bigband (Big Phat) from any speaker before.
Well, big words, but I will encourage diy fellows to try out this technical simple concept if you consider to build a column (and tons of elbow grease).
The "but" is that you need 6 channels, active xo and DSP.
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