Krell Evolution
Schris22
Posts: 983
Just thought these were pretty. Did a search and someone found a pic at the CES show. So might be old news...but still eye candy.
http://www.krellonline.com/krell_component.php?id=2&page=evo1
I love the way they pulled off the black with blue accents
FEATURES
In the Evolution One, the output impedance of the final gain stages is one hundredth that of the final gain stage in most power amplifiers. This provides extremely wide bandwidth and very high current capability. The Evolution One does not employ global negative feedback--the final gain stages use only 8 dB of local, nested negative feedback. This is one-five hundredth of the amount used in most solid-state power amplifiers. The result is an extraordinarily open, liquid, effortless sound.
The rails powering the low level and gain stages in the Evolution One are regulated twice for total immunity from fluctuations in the AC mains and virtually noise-free output. All the regulators use current-mode circuitry for wide bandwidth, low output impedance, and complete immunity to varying load conditions.
The high-current regulators powering the Evolution One output stages use fully complementary gain stages and output drivers. The resulting wide bandwidth and low output impedance of the Evolution One surpasses even the stringent demands of the amplifier output stages. The driver and output stages in the high current regulators use 14 pairs of the same robust, high performance power transistors used in the amplifier output stages. All the regulators are located in the amplifier chassis to provide ultra low impedance supply rails for the audio circuitry. Krell alone employs regulated output stages of this nature, which contribute dramatically to the current capability of the amplifier. Essentially an amplifier within an amplifier, the complexity and cost of the Evolution One regulator virtually insures that no other manufacture dare attempt it.
The new Evolution Bias system features 12 individual bias levels for optimum performance and efficiency. Evolution Bias constantly compares the audio signal at the input stage with impedance at the output stage, and adjusts the bias current accordingly. In addition, a proprietary bias monitor continuously measures and adjusts the output stage bias, eliminating the need for future adjustment or calibration.
Housed in a separate chassis, the Evolution One power supply makes use of extensive electrical and magnetic shielding to keep radiated interference out of critical amplifier circuits. Internal high current line conditioning circuitry filters RF noise on the AC mains, as well as compensating for asymmetric power waveforms and DC on the mains. A dedicated 165 VA toroidal transformer with six independent secondary windings powers the amplifier's low level stages, gain stages, and control circuitry. Power for the high current regulators and amplifier output stages comes from two massive 2500 VA toroidal transformers. These in turn drive eight 35-amp bridge rectifiers and 120,000 microfarads of filter capacitance. High reliability connectors with 56 machined, gold plated, 20-amp contacts transmit these tremendous power reserves to the regulators.
That is all,
Chris
http://www.krellonline.com/krell_component.php?id=2&page=evo1
I love the way they pulled off the black with blue accents
FEATURES
In the Evolution One, the output impedance of the final gain stages is one hundredth that of the final gain stage in most power amplifiers. This provides extremely wide bandwidth and very high current capability. The Evolution One does not employ global negative feedback--the final gain stages use only 8 dB of local, nested negative feedback. This is one-five hundredth of the amount used in most solid-state power amplifiers. The result is an extraordinarily open, liquid, effortless sound.
The rails powering the low level and gain stages in the Evolution One are regulated twice for total immunity from fluctuations in the AC mains and virtually noise-free output. All the regulators use current-mode circuitry for wide bandwidth, low output impedance, and complete immunity to varying load conditions.
The high-current regulators powering the Evolution One output stages use fully complementary gain stages and output drivers. The resulting wide bandwidth and low output impedance of the Evolution One surpasses even the stringent demands of the amplifier output stages. The driver and output stages in the high current regulators use 14 pairs of the same robust, high performance power transistors used in the amplifier output stages. All the regulators are located in the amplifier chassis to provide ultra low impedance supply rails for the audio circuitry. Krell alone employs regulated output stages of this nature, which contribute dramatically to the current capability of the amplifier. Essentially an amplifier within an amplifier, the complexity and cost of the Evolution One regulator virtually insures that no other manufacture dare attempt it.
The new Evolution Bias system features 12 individual bias levels for optimum performance and efficiency. Evolution Bias constantly compares the audio signal at the input stage with impedance at the output stage, and adjusts the bias current accordingly. In addition, a proprietary bias monitor continuously measures and adjusts the output stage bias, eliminating the need for future adjustment or calibration.
Housed in a separate chassis, the Evolution One power supply makes use of extensive electrical and magnetic shielding to keep radiated interference out of critical amplifier circuits. Internal high current line conditioning circuitry filters RF noise on the AC mains, as well as compensating for asymmetric power waveforms and DC on the mains. A dedicated 165 VA toroidal transformer with six independent secondary windings powers the amplifier's low level stages, gain stages, and control circuitry. Power for the high current regulators and amplifier output stages comes from two massive 2500 VA toroidal transformers. These in turn drive eight 35-amp bridge rectifiers and 120,000 microfarads of filter capacitance. High reliability connectors with 56 machined, gold plated, 20-amp contacts transmit these tremendous power reserves to the regulators.
That is all,
Chris
Receiver: Onkyo TX-SR502-S
DVD Player: Pioneer DV-578A-S
Left and Right: R50
Center: CS1
Rear Center: R15
Surrounds: R30
Subwoofer: 10'' Dayton 100 Watt
DVD Player: Pioneer DV-578A-S
Left and Right: R50
Center: CS1
Rear Center: R15
Surrounds: R30
Subwoofer: 10'' Dayton 100 Watt
Post edited by Schris22 on
Comments
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$90K for 90 year old technology. Sure they tweeked it a bit but same old same old. Man there's a sucker born every day. They forgot to mention how big the house is they give you when you buy them. After all they do need a nice home to play there "liquid sound" in."2 Channel & 11.2 HT "Two Channel:Magnepan LRSSchiit Audio Freya S - SS preConsonance Ref 50 - Tube preParasound HALO A21+ 2 channel ampBluesound NODE 2i streameriFi NEO iDSD DAC Oppo BDP-93KEF KC62 sub Home Theater:Full blown 11.2 set up.
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I agree $90k for the premium 8-piece two-channel system is so far beyond ridiculous for a preamp/amp combo that it defies belief. That said, I hear this system on some B&W 800's ($40k/pr themselves) and I thought it sounded pretty damn amazing. I'm not even a big fan of B&W. But you could get so close to that quality for less than 1/2 that price tag, which makes it seem so superfluous to all but the richest of folk. Pretty cool to have the power supply in a completely separate chassis though.Current System:
Mitsubishi 30" LCD LT-3020 (for sale**)
Vienna Acoustics Beethoven Concert Grand (Rosewood)-Mains (with Audioquest Mont Blanc cables)
CSi5-Center (for sale**)
FXi3-surrounds (for sale**)
Martin Logan Depth-Sub
B&K AVR 507
Pimare CD21-CD Player
Denon 1815-DVD Player
Panamax M5500-EX-Line Conditioner
