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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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Tandy Optimus 77 Upgrade

These Tandy Optimus 77, though many years old, had never been used. They were in as new condition but the woofer surround had rotted. I replaced the 5” woofer with an inexpensive 4” driver. I made clamps to hold it in place and heavy foam to ensure a good seal. The Xover 4.7uf cap was replaced with a quality cap and additional dampening added. They good but not stunning.

K-8LS-Tube-Amplifier-Schematic.png 12AX7-Golden-Dragon-Valve-PreAmp.jpg Finish.JPG S5-Electronics-K12G-Tube-Amp-Kit-Schematic~2.png Fostex-FX120-Bass-Reflex.jpg
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Album name:Speaker and Subwoofer Projects
Filesize:238 KiB
Date added:Dec 01, 2007
Dimensions:1024 x 768 pixels
Displayed:13085 times
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