I have been using the Furman SPR20i now for about two weeks, and it is an obviously well-built unit designed for many years of service. I bought the unit primarily to protect the vacuum tube amplifiers of my stereophonic audio system. Like another reviewer, I suffer from voltage fluctuations that are very hard on vacuum tube amps. I have not had the unit long enough to know if it has solved my problem, but I thoroughly expect it to do so. My test equipment also confirms that the SPR20i holds the voltage at a steady 120v. Because of the ample provision for plugs on the unit, I have also connected my home theater receiver, amps, and tv to it. To my fairly well trained eye and hearing, there is no apparent improvement in either sound or picture quality, nor did I expect there to be. Despite the hype of the product description and some of the reviews, my opinion is that this equipment best serves to protect and extend the life of expensive audio and video equipment, not to improve the quality of sound or video reproduction. If you buy it for the latter, I fear you will likely be disappointed. The blue display light is, indeed, a bit bright. For me the solution was a piece of translucent tape.
Pros: Unit should provide excellent protection for expensive a/v equipment for many years.
Cons: Over hyped claims for improved picture/audio quality.
6 of 6 found this helpful
This unit is the best yet. We install this equipment in limousines running a Crestron system in front of a suite of AV equipment. In this "challenging" environment, the SPR20i is the first unit to perform flawlessly.
Pros: Excellent performance
2 of 3 found this helpful
I love the Furman20
0 of 3 found this helpful
Before I bought the Furman I was the previous owner of Monster products. I had the HTS-5100 which was connected to the AVS-2000. I had recently noticed that this combo was only keeping my system at 118.5 volts on average. I was beginning to suspect that the 5100 was the problem. Also at least once a day both systems acted as if a huge surge was coming in and as a result the display on the 5100 would dip down to 117 volts. I was also noticing that the picture from my 60inch Sony LCD was not as sharp as it used to be, it looked rather dull and lifeless. So I took a chance and bought the furman and am I glad I did. The first thing I noticed was that my tv now looked sharper and the colors a little more vivid. The Furman is also better built than the 5100 and it weighs about 11 pounds more. The 2000 and the 5100 do have a dimmer switch while the Furman does not even though the instruction manual says so. Furman actually confirmed that was a typo and will send you a corrected version of the manual upon request. It was for that reason I gave it only a four star rating. The blue display is very bright and if placed a few feet to either side of your tv it will be noticeable. A great purchase that I do not regret.
Pros: Pricey but worth it.
Cons: No dimmer switch for the bright blue display even though the manual says it has one.
15 of 17 found this helpful
Converting to high-grade audio tube equipment using KT-120 or KT-88 output tubes last year, I was encountering some wild voltage swings from our utillity, especially voltage jumps to 123VAC. These were murder on the rectifiers, which at $55 a pop are not pleasant to replace. Research led to the discovery that in the best of circumstances, under the U.S. ANSI standard, voltage to your house's service entrance can swing through about 12 volts (+ or minus 5% of 120 VAC) with even greater permissible short-term deviations. Since putting the Furman on line to a dedicated 20-amp breaker last winter, I'm on the same rectifiers, my tubes are happy, and I have enjoyed improved audio quality as well. My Fluke meter verifies Furman's claim that the Furman keeps output voltage rock-steady at 120 VAC, plus or minus less than a volt. Why expose expensive audio equipment to the vagaries of unacceptable but perfectly legal over- and under-volt situations?
Pros: Does its job as advertised. Essential for tube gear.
Cons: Spendy. But so are $50 rectifiers, $100 output tubes and capacitors.
20 of 21 found this helpful