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The Krell Evolution 707 is a state-of-the-art surround preamplifier/processor designed for high-performance home theater systems. It features 8.4 channel audio output with two center channels and four subwoofer outputs, allowing maximum flexibility in system design. The unit supports advanced surround sound formats including Dolby TrueHD and DTS HD Master Audio lossless surround formats via four HDMI 1.3 compliant inputs. It incorporates Krell's proprietary Evolution CAST circuitry and Current Mode topology for superior audio fidelity, with fully balanced outputs and a 16-bit balanced resistor ladder volume control in preamp mode for the purest signal path. The Evolution 707 includes dual 32-bit DSPs for precise surround processing and supports multiple surround modes including Dolby Digital Surround EX, DTS 6.1 ES, and nine proprietary Krell Music Surround modes. Video processing includes all-discrete video circuitry with 350 MHz bandwidth, HDMI 1.3 inputs and output, and analog video scaling to 1080p/60Hz. The unit offers extensive connectivity with multiple analog and digital audio inputs, video inputs (composite, S-Video, component, HDMI), and outputs for main and secondary zones. It features a robust aluminum chassis available in black or silver finish and weighs approximately 23.6 kg. The Evolution 707 also supports the Krell Automatic Room Equalization System (ARES) for advanced room correction, applying individual EQ curves to each of the 8.4 channels to optimize sound in complex environments. Control options include 12-volt triggers, RS-232, RC-5 input, and Krell Link connectors for integration with other Krell components. The unit was introduced in 2006 with a suggested
Analog signal output specifications
Input and output connections
Size, weight, and appearance
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The closest alternatives on specs, description and the systems they turn up in, with the specs they share set side by side.
The T175HD's signal-to-noise is 95 dB against the Evolution 707's 96 dB, its output voltage 5.0V RMS against 8.9V RMS, its weight 8 kg (18 lbs) against 23.59 kg (52 lbs), and its width 435 mm against 439 mm.
The DMC-1's signal-to-noise is 97 dB against the Evolution 707's 96 dB, its weight 9.98 kg (22 lbs) against 23.59 kg (52 lbs), its width 431.8 mm against 439 mm, and its height 146.05 mm against 249 mm.
The GTP-600's signal-to-noise is 100 dB against the Evolution 707's 96 dB, its output voltage 2.0V RMS against 8.9V RMS, its weight 7.71 kg (17 lbs) against 23.59 kg (52 lbs), and its height 111.1 mm against 249 mm.
The ACT-3's signal-to-noise is 90 dB against the Evolution 707's 96 dB, its weight 6.35 kg (14 lbs) against 23.59 kg (52 lbs), its width 431.8 mm against 439 mm, and its height 139.7 mm against 249 mm.
KAV-280p
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