Well, I took the plunge and shelled out $200 for five fuses, plus overnight shipping, and they arrived yesterday.

The first thing I did was replace the main power fuse to see if the Hi-Fi Tuning fuse made any difference. Well, it certainly did, though the difference was subtle. There was a noticeable increase in upper-end definition, and a bit more "oomph" in the dynamics. That even this amount of difference could be had simply by replacing a line fuse is amazing.

But what was truly amazing was the sound after replacing the remaining four fuses. If I were to make an analogy, it would be the same as the before and after if you have your car tuned up, put on new tires, and have the wheels balanced and aligned: while the car may have performed well before, now everything works better. It starts more easily; it runs more smoothly; the transmission shifts more readily; the handling is better; and it rides more smoothly. In short, while good before, it's a whole lot better now.

I haven't yet had the time to do any extended listening, but each and every disc I played yesterday sounded remarkably better than it had before, along with that familiar and pleasant, "Gee, I've never heard that before..." sensation.. There is as huge improvement in upper end detail, and in particular, the delineation of individual sounds as opposed to one, homogenous sound, especially when there's a lot going on, as in a massed choral piece with the entire chorus singing along with the orchestra playing. Pin-point stereo imaging, something my Dahlquist DQ-10's have long been famous for, is also noticeably improved. In short, everything sounds better, and much better at that.

The Adcom GFA-5800 is a very good amp. Nelson Pass, who designed the amp, has called it the best sounding amp Adcom ever made (perhaps a bit of personal bias here?" I've always been satisfied with its performance, and it seems a perfect match for the DQ-10's, offering 250 watts/channel, and high current, which is what the speakers eat up. Now, it sounds almost like a "new & improved" model, it's that much better!

Once again, my highest recommendation goes to these fuses for their remarkable ability to so greatly improve the sound of a given component. No wonder Stereophile lists them as a "recommended component." I certainly do! Now, I can hardly wait to replace the fuses in my other components!