ELOQUENCE dipole sattelites and TURBULENCE LAT 2800 woofer towers - Ground Sound digital active cross-over and poweramps. | ||
This is a really big speaker system. I have made my fair deal of small 2-way
speakers. But now I want a full-range reproduction as well as
high sensitivity.
Going active is one way to do it. I think it is the only way to do it! Especially when it comes to the interface between amp and woofers. With the Danish Ground Sound system you get a modern digital cross over with all the functions you expect of a moderne system. The 8 LAT 700 drivers arrived packed in pairs. One box as seen in the picture on the right weighs in at approx 32 kgs (60 lbs).
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Right: The first trial set-up. One LAT in the bottom, just to see how it will
look. Left: Alle 4 LATs are mounted. 110 kgs (210 lbs) speaker tower but still manageable. The half finished 2nd tower on the side with a Hans Thessink CD to show the size. The woofers will be powered by the Ground Sound PA33C 200 Watt amplifer (see below), The mid/tweeter range dipoles each have two Accuton ceramic drivers - C2
90 - 8 ohm 93 dB. With the two in parallel the resulting sensitivity will be
approx 96 dB/4 ohm. They will reproduce the 225 Hz to 2.200 Hz range.
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Measurements Close field measurment done with the HOLM Acoustics - HolmImpuse system and calibrated microphone. (Free dowload from their web-site: http://www.holmacoustics.com/) The x-over and the EQ-correction has been done with the Ground Sound DCN23 (see below). Upper response: Lower response::
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Links: |
LINKS: PDF-file with cut-out pattern and
assembly drawing;
Links to "H" and "U" frame technology: Or you can download this very technical description
about "U" and "H" frames: |
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The Eloquence - 2-way side systems | ||
The top ribbon is a modified Aurum Cantus G3. 102dB/1 Watt. Here the original G3 Aurum Cantus ribbon on the left. With the new leather covered baffle designed, so the two midrange drivers can be mounted closer together covering the top and bottom of the ribbon. |
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