Sunfire Load Invariant Stereo Amplifier Amplifiers
Sunfire Load Invariant Stereo Amplifier Amplifiers
USER REVIEWS
[Feb 25, 2002]
wayne nielson
AudioPhile
Strength:
More power and dynamics than most will ever need.
Weakness:
No power switch. The Sunfire Stereo amp is in use with: Sony TAE-9000es pre-amp. Martin-logan reQuest fronts. Sony TAN-220 rear channel amp. Difinitive Technologies BP2X surround speakers Sony CDP-XA20es CD player. Acoustic Research ARS300 Sunfire powered subwoofer. Results: Using "small hall" or "live room" on the Sony pre-amp, the Sunfire could play transients to lifelike levels. Any of Brian Setzer Orchestra albums became startling with realistic attack and decay. The word phrase "dynamic range" now can be uttered. Forget SACD, get all of the sound out of the regular cd''s. This is the BEST front end amp in the world, period Similar Products Used: Soundcraftsmen 5002, class H |
[Mar 15, 1999]
C.J.
an Audiophile
In my system:· Theta Data Basic II |
[Sep 22, 1998]
Roger W. Stevens WA3FLE
an Audio Enthusiast
I had to do this--I had to buy a godawful powerful amplifier to drive my PSB Goldi's in their far-field monitoring application in my 26'X 26' home-based studio, and my Hafler DH 500 (bless its heart) just could not quite deliver the goods. Always sounded great, mind you (to me, anyway), but would cut out due to its over-temperature protection circuit after 10 minutes of 105+ dB SPL (at one meter, average program material). Drove me nuts; I chased this problem for months--see my PSB Goldi review(s)--and finally decided it was a natural physical phenomenon: according to the Stereophile review (I don't measure these things myself), the Goldi's impedance drops to 2.87 ohms if I recall correctly at some fairly low-ish frequency, and that was pulling more power than the DH 500 could comfortably deliver. So be it. |
[Mar 04, 2001]
Robert
Audio Enthusiast
Strength:
Smooth Treble, natural harmonic balance, spacious sounding
Weakness:
background hum is sometimes audible I had to respond to some of the erroneous statements in some of the reviews here. None of the Sunfire amps are Class D switching amplifiers. The Amplifier circuit is a rather conventional Class AB type; the are no switching devices in the audio amplifier channels. What makes these amps unique is their power supplies. The Power Supply IS a switching type supply but it is unique in that it tracks along with the music signal. The supply is essentially a regulated power supply but instead of using an immovable static voltage reference(almost impossible to achieve), it uses the music signal itself. The advantage to this is that the output transistors of the amplifier do not have to dissipate the heat produced by having fixed power supply rails that are significantly greater than the average signal level. At idle the output transistors see only about 8.5 volts across them. As the music signal increases, the supply rails continuously track the signal. At full power the supply rails approach 120 volts.As a result, the Sunfire amps have no heat dissipation devices and yet still run cool.Another advantage to thse amps is that they cope extremely well with low impedance loads. The Sunfire amp will double its wattage into 4 ohms, double it again into 2 ohms, and if your circuit breaker can stand it double it again into one ohm. Similar Products Used: Adcom GFA555, Audire, Dyna400,etc |
[Oct 18, 2001]
Dave
Audio Enthusiast
Strength:
as everyone is saying: smooth presentation, not overly huge or heavy but with ample power reserves and good soundstaging. It's also an attractive piece of equipment with a better than usual array of input and output options, including balanced XLRs, and two sets of phono inputs, plus two sets of five-way binding posts for outputs.
Weakness:
if choosing the current output, highs may be perceived as slightly overly tamed I must say that this amp is a pretty unconventional one when compared to its competition-- higher-end Parasounds, Brystons, used Krell, higher-end Rotels, etc. Similar Products Used: Kenwood KM-Z1 THX Ultra amp, various |
[Mar 15, 1999]
C.J.
an Audiophile
In my system:· Theta Data Basic II |
[Jul 01, 1999]
Jfrey
an Audio Enthusiast
I read about the sunfire and found the articles interesting. I have allways liked the Carver products and feel that they have been given a bad rap. I finally found the Sunfire amp at a going out of business sale and got one at a bargain and what a buy it was. I have heard systems that cost many times hat the Sunfire cost and can say that I don't believe that it can be beaten atleast at an affordable price. I have some Magnepans that sing with the power. |
[Jul 05, 1999]
Pat
an Audio Enthusiast
This amplifier has really opened my ears to "realism" in my home. I really excels in the midrange and higher frequencies. Cymabals and female vocals have never sounded so real. Although 300wpc may be hard to believe, it's the sound that I like.This drives my Mirage M3si's , closest to tubes that I have had. |
[Aug 17, 1999]
jeff
an Audio Enthusiast
I had the Sunfire in-house for about a week. It replaced my previous trial products Adcom 5400, 5500, and B&K 4420. Adcom's had no detail whatsoever. B&K sounded pretty good, but was lacking bass on my system. My initial listening to the Sunfire had me packing up the B&K immediately (something I sort of regret now). After 2 days, though, I tired very much of the Sunfire sound. Yes, it would play very loud, and if thats all you're after, go for it. I found everything but the bass to be muffled somehow. My speakers aren't awesome (15 year old Polk RT-12a's) but they remained a constant in my listenening tests, so I really can't blame them. For the price of this unit, you get alot of wattage, end of story. By the way, the reason I'm even looking is because my 15 year old Carver M-250 sadly died on me, so I've got nothing against Bob Carver equipment. |
[Mar 02, 1999]
MR.Purple
an Audio Enthusiast
Im sorry about my past negative review of the sunfire. You see I work for Pass Labs, well I did, before they went |