GoodSoundClub - Romy the Cat's Audio Site

In the Forum: Horn-Loaded Speakers
In the Thread: Polish Autotech steps up to Universe

Post Subject: Universe explainedPosted by jzagaja on: 11/19/2010

To make the story short Smile

Autotech is a family business located in Lublin, Poland. Younger brothers graduated in mechanical engineering are cars and racing lovers - with scores in Europe as professional drivers and mechanics. One year ago Lukas wrote to me asking if we can start making JMLC horns. He loves to make things with passion. We have made a complete range of JMLC horns includes asymmetrical and two waveguides supplying to DIY and OEM. because investment was significant we continue with a complete speakers - making affordable horns is romantic but we need amortization.
We do not press like Avangrade. It's hand lamination with full rollback that's why horns looks bigger for particular "cut off". Avantgrade expands more rapidly, Tractrix is much smaller. Our horns are diffraction killers. I was told by visitors during Audioshow that vibrations are much smaller than in Avantgarde.
Please note we made those 4 models: Universe, Mummies, Drops and Sub1 in one month! Which company works under such pressure? Because passive crossover was impossible we chosen DSP controlled fully digital amplifier - to many hot things. During assembly on Friday nothing worked. On Saturday we realized that switching power supply is faulty. On Sunday we started tune up system without measurements and sound started to be ok. Heavy metal lovers told us this was the only one system capable of reproducing such a dense music.
Now I have one Universe in my home and I like it very much - I think the reason is midrange reproduced with small dome of Monacor KU-516 and highs from ringradiator. Of course distance between 200Hz horn and 1000Hz is too large but you can install smaller JMLC-350 or coax driver from BMS or BC. This is an ultimate option. As for the 1:10 transmission line - we have made custom 16Ohm driver for tiny 20W amplifier in BTL mode and allow push-pull action reducing size of labyrinth. Bass is punchy, tight and integrated with room much better than 4th order bandpass. Passive crossover is ready - mix of 1st and 2nd order filters with one amplifier side Zobel - ruler flat impedance of 4Ohms (80Hz and up). Below is RAW response without crossover in my room.

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