A low-profile affair with a bridge-tied load.
Page 1 | Page 2 | | Page 3 | Page 4
And there it is, all finished, shiny, and ready for gift wrapping:
Figure 17. The completed unit.
Sometimes, there's something to be said for a minimalist style. The power switch includes an internal neon lamp to illuminate a green lens, and that is all the unit requires. Unlike my P101 project, I decided to omit the added complexity of a SIM or equivalent clipping circuit. Power on, or power off, and let the receiver or other audio source handle the rest. From the rear, the unit has more of a business look to it, but once again only the essentials are present:
Figure 18. Rear view shows I/O and power jacks, plus fan.
The speaker terminals, audio input jacks, power jack, fuse reset switch, and fan grill are all that is
required. Everything else happens inside the box.
The final conclusions? No complaints whatsoever. The amplifier was run under heavy load for a spell without any hiccups, and then was gift-wrapped for delivery to its new owners. Since then, the unit has been used almost daily to drive a pair of 2-way Klipsche bookshelf speakers and it has never failed to perform. HEXFET amplifiers may not be on everyone's wishlist, but for this application and with a sufficiently hot bias, they have worked admirably and are expected to perform reliably for a long time to come.
Optimized for a 1024 viewing width ~//~ All content (c)2008 aaronv.net