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 NEW    Bruce Heran outlines the details and construction of his simple DIY 6DJ8 (ECC88) Tube Hi-Fi Headphone Amplifier Project.

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HiVi BN4 Anodised Aluminium / Magnesium Midbass Drivers

The drivers in these metal enclosure Tandy / Realistic / Radio Shack Minimus 77 speakers, had been burnt out when a chip amp decided to deliver pure DC. So I upgraded the drivers to these metal cone varieties. The magnets (neodymium) are big partly due to the shielding which is done with magnetic repulsion. The cones are ultra-light and very rigid and the surrounds compliant. Power rating is 25WRMS and under listening tests, in the enclosures, go down to 100hz. The over-all sound is bright (see other image). The crossover is 1st order and additional dampening was added to the box.

DIY-Three-Way-Tower-HiVi-Loudspeakers.JPG DIY-Three-Way-Tower-HiVi-Speakers.JPG Realistic-Minimus77-Speakers-AlMg-Driver.jpg Realistic-Minimus77-Speakers-Grills-On.jpg DIY-Jordan-JX92-Tower-Loudspeakers.jpg
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Filename:Realistic-Minimus77-Speakers-AlMg-Driver.jpg
Album name:Speaker and Subwoofer Projects
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Date added:Oct 14, 2008
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