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User reviews and community discussions portray the Krell Evolution 707 AV Processor as a high-end audiophile component prized for its exceptional sound quality and robust construction, though criticized for its high cost, heat output, and occasional reliability perceptions tied to its weight.
### Sound Quality
Owners and reviewers consistently praise its superior sonic performance, describing it as stunning for high-resolution movie soundtracks and music, with precise frequency division, accurate reproduction, and immunity to audio interruptions from connected displays. It employs advanced DSPs (e.g., dual-core Crystal CS497004 at 64-bit precision), Evolution CAST circuitry, and balanced outputs for a pure signal path, outperforming many competitors in home theater and stereo modes. The free ARES room equalization upgrade further optimizes it for real-world rooms, supporting multiple user memories without averaging positions.
### Build Quality
The build is frequently called "insane" and uncompromising, housed in a heavy (49 lbs), all-aluminum chassis typically used for amplifiers, with separate linear power supplies, discrete Class A circuitry (no op-amps), and high-bandwidth video passthrough up to 1080p. Users note its premium fit and finish, milled faceplate, and robust design that runs noticeably hot even at idle, emphasizing durability over efficiency.
### Reliability
Feedback is mixed: positive on operational stability (e.g., no HDMI dropouts during display power cycles), but some forums mock its heft, joking that two people are needed to lift it despite lighter competitors like a 63-lb Denon, implying overbuilt design questions reliability or practicality. Firmware updates like ARES were dealer-installed and free, suggesting good manufacturer support.
### Strengths
- Audiophile-grade sound in a processor, with lossless format support (Dolby TrueHD, DTS-HD MA) and flexible 8.4-channel outputs (dual centers, quad subs).
- Exceptional build and room correction via ARES for personalized setups.
- Pure analog bypass and CAST for cable-immune performance.
### Weaknesses
- High price ($30,000 MSRP) limits accessibility.
- Generates significant heat and consumes power, not "green."
- Lacks modern features like height channels, 4K scaling, or tuners found in newer processors; some view the weight as excessive.
### Overall Reputation
In audiophile communities (e.g., Audiogon, Audioholics, Stereophile forums), it holds a strong reputation as a reference-tier processor for sound purists, often compared favorably to Theta Casablanca but standing out for build excessiveness—loved by high-end enthusiasts, dismissed by others as overpriced or impractical. Discussions from 2008–2010 highlight its flagship status, with lasting appeal among owners despite age.
English (US)