[Ferrari]

Quote:

Originally Posted by amb /img/forum/go_quote.gif Yes, 2-way D'Appolito, a.k.a. MTM. The crossover has an all-pass filter on the tweeter circuit for time alignment.

Using all-pass filter is much easier to shift the tweeter to the back a bit (time delay), to align the tweeter with the center of the 2 woofers than doing it mechanically.

 

[swt61]

Quote:

Originally Posted by krmathis /img/forum/go_quote.gif ^ Thanks a lot! *saved* ..and don't worry about the K1000. I have no doubt its a plenty powerful and great sounding amplifier for the task. I will of course post pictures and impressions when time is due.

It drives K1000s effortlessly, and sublimely I might add.

 

[HeadphoneAddict]

Quote:

Originally Posted by amb /img/forum/go_quote.gif My own DIY speakers: AMB θ19, featuring Dynaudio Esotec drivers

Ooohhh... Pretty... Me Like.

I can haz some speekurz!

 

[amphead]

Just came back from the very international/engineering intensive Burning Amp show. The Balanced Beta 22 was beautiful sounding with speakers/headphones and a stunner to look at. I am working on the donors list award plaque design, to accompany the amp, when testing is complete. Please realize that extensive testing is necessary for the amp, due to the shipping costs involved in sending the amp to Norway. We have done some realistic load testing and will probably do some heavy load testing before it would be ready to ship. Pics tomorrow, I need some sleep.

 

[krmathis]

'amphead'. Sound like the Burning Amp show was fun.
Make sure you keep us posted with some pictures when you have had your beauty sleep.

 

[krmathis]

Ro. I noticed you posted a link to some pictures earlier today, which got lost by the recent Head-Fi outtake. Can you please re-post?

Cause I did not find time looking thought them earlier today...

 

[nor_spoon]

That would be nice. I did not get the chance to see pictures either.

 

[DaMnEd]

http://www.amb.org/ti/audio/burningamp2008/

 

[amb]

Gah. Looks like head-fi lost some recent posts.

 

[krmathis]

Quote:

Originally Posted by DaMnEd /img/forum/go_quote.gif Burning Amp Festival 2008

Thanks!
Looks like a really nice event. Some great DIY amplifiers, and more, around there.

Wonder what people thought of the β22 and α22. Hopefully they liked what they saw, and heard.

Quote:

Originally Posted by amb /img/forum/go_quote.gif Gah. Looks like head-fi lost some recent posts.

Yeah, sadly we did!
I posted through most of the day, and when I returned after dinner it were all gone. What a waste.

But at least the forum returned in an hour or two, and we did not loose anywhere are much as in November last year.

 

[amb]

Quote:

Originally Posted by krmathis /img/forum/go_quote.gif Wonder what people thought of the β22 and α22. Hopefully they liked what they saw, and heard.

Yes indeed. The day was packed full of presentations, raffles and auctions; and being a speaker-centric (rather than headphone) event, the room was often loud, but people who had a chance to hear (and see) the β22/α22 were uniformly impressed.

Even the Mini³ found itself popular with a number of people, who were quite smitten by its sound and small size.

Notice the piles of toroidal transformers and amp chassis in the photos? Those were brought in by Nelson Pass. Some of them were given away in the raffles and others were auctioned. Nelson is a really cool guy, he came over to my table to look at the β24. I showed him the schematic and reminded him of our previous email conversations, and he nodded approvingly.

 

[amphead]

I was one of the lucky winners of the raffle for Nelson Pass amplifier projects. It weighs about 45 lbs. and is alot of aluminum heatsink. Don't know what I will create with it yet. Here is a nice pic of the table at Burning Amp with Jrossel listening to Krmathis amp.........

 

[Jose R]

Can someone tell me what the size of the par-metal chassis is?

It looks like 12x12x3 with 6mm front plate.

 

[amb]

Quote:

Originally Posted by Jose R /img/forum/go_quote.gif It looks like 12x12x3 with 6mm front plate.

That's correct. To be exact, the front and rear panels are both 6mm. In this build I ordered Par-Metal cases equipped with "front" panels on both front and rear, so that the panel support piece is the same on both ends. The actual panels used were supplied by FPE.

 

[Jose R]

Excellent.

I am thinking of building your amp much like you designed this group build.

Thanks!

BTW great looking amp. And very elegant interior layout.