This album shows making of ELODIS-SUB VB21 including measurements.
ELODIS-SUB VB21 was my first product when I started with business in 2007.
This subwoofer was mainly designed to show what is possible from artisanal aspect – a “money is no object” project without any economical or practice-oriented thoughts.
Nevertheless measurement data and sound performance of this woofer also suit this needs.
This woofer is designed as very large vented box assembled with a 21-inch drive unit and without built-in electronics. The woofer is designed for using external amplification and filter electronics.
As long as TSP of the drive unit is fitting with the large enclosure volume any wanted drive unit can be used due to exchangeable mounting torus.
This woofer is made of 5 sheets !! of compreg (2130x1000mm each) – brand name is PANZERHOLZ from DELIGNIT, for example.
This material is basically beech plywood – layers of high quality beech veneers are highly compressed (40 N/sq mm) under heat and by using resins.
For bracing I made an exceptional effortful frame made of high grade aluminium rods, mounted together by using several hundreds of M8 screws and tapped bushings – all high grade stainless steel.
Only this frame has a weight of 110 Kgs.
Using of aluminium rods for bracing is much more efficient in this case (volume to stiffness ratio) than other uusually used materials for bracing. Despite of using aluminium rods for bracing the used rods have to be “massive” because of the high strenght factors of the used material for enclosure walls – using of some thin rods would not have any noteworthy effect in this case;-)
Cabinet walls are partly up to 84 mm thick (30 mm as minimum).
All enclosure parts are screwed together by using further several hundreds of M8 screws and tapped bushings made of high grade stainless steel (each 700 pcs of scews and nuts).
Frame and enclosure parts are not glued together because of the different expansion coefficients of aluminium and compreg.
For sealing of all enclosure parts grooves are made to have defined compression for the inlays of the used gasket and to have an optimum and durable force fit.
Dimensions:
W = 1206 mm, H = 960 mm, D = 790 mm
Net weight: 440 kg
Recommended operating range: 15 - 120 Hz
Due to the heavy weight this woofer is only usable at solidly built basement rooms or ground-level rooms.
Further details and PDF’s also at:
Elodis Subwoofer, speaker - systems for highest acoustic performance
Due to the heavy and less practice-oriented weight and the high building effort I have discontinued this product.
This first commercial subwoofer made by ELODIS SUBWOOFER is up for sale now!
It is the unit shown on the following pictures and is a nearly unused and 8 years old demonstration model.
Finish is bubinga veneer and black, all high gloss polyester
Price is EUR 8.500,- now ex-work incl. VAT (original retail price was EUR 36.500,- incl. VAT), shipping not included.
The mounted feet (adjustable) are high enough to move the woofer by using a lifting cart.
Musical Paradise mp-301mk3 ( Lett modifisert)
Quicksilver Full Function preamplifier - en legende. Bygd som en effektforsterker i 2x100W klassen.....
Innmaten på en av mine absolutte favoritter i prisklassen(Exposure 3010s2 D).
Monarchy Audio Dac(min sin)
Absolare
L
Man tror man kan se om det låter bra, men det kan man altså ikke.
Kanskje denne absolaren er den samme men uten at noen fingre har tukla med den.
Micromega Tempo 2
