Evolution 707 3D

Reference Surround Processor

The Evolution 707 3D aesthetic extends Krell industrial design and takes surround preamplifier/processor construction to an unprecedented level. Housed in the same chassis as the Krell Evolution 402e stereo power amplifier, the Evolution 707 3D stands nearly 10" tall and weighs in at over 50lbs. The custom machined aluminum chassis includes diamond cut detailing that not only looks incredible but also fronts the resonance free environment that contains the sensitive electronics within its core. The Evolution 707 3D includes our finest audio and video engineering plus the latest in connectivity technology, HDMI™ 1.4, and the Krell Automatic Room Equalization System (ARES) to insure the ultimate home theater experience. The audio signal path is a direct descendant of our flagship Evolution 2 stereo preamplifier. The Evolution 707 3D presents a purity of sound and video resolution previously unavailable in home theater systems.

 

FEATURES

Based on award-winning preamplifier technology, the Evolution 707 3D includes twelve output stages with two center channel and four subwoofer outputs, in an 8.4 channel configuration. All channels feature Evolution CAST™ circuitry for the most stunning reproduction of today's high-resolution movie soundtracks. CAST™, which is short for Current Audio Signal Transmission, is a proprietary method of sending audio signals between components in the current domain. Krell components connected in Evolution CAST™ act together as an electrically unified whole, free from the deleterious effects normally imposed by connecting cables. Balanced outputs and single ended outputs are also included for use with conventional amplifiers. Preamp mode bypasses all digital circuitry and routes the analog input, stereo or 7.1 multi-channel, directly to the 16-bit balanced resistor ladder volume control for the purest signal path possible.

 

 

 

 

 

 

 

 

 

 

 

KRELL AUTOMATIC ROOM EQUALIZATION SYSTEM (ARES)

ARES analyzes the speakers' capability, position, phase and distance relationships to determine ideal crossover points, delay, and volume settings. Listening room surfaces, speaker positioning and construction play a pivotal role in the overall sound quality of a system. ARES measures these effects against the inherent performance of the system's speakers and corrects for irregular surfaces, problematic speaker locations, and unusual floor plans. A 32 bit dual core DSP running at 1.8 giga operations per second computes equalizer filter coefficients and applies individual curves to each of the 8.4 output channels. A trio of user system memories provides greater flexibility and personalization than other systems on the market. Instead of an averaged result from various listening positions, three individual listening positions may be measured and optimized rather than compromised by an averaging-style system. Alternatively, system memories may be used for different speaker configurations so that one memory can be optimized for two channel listening with full range front speakers, a second memory for movie playback with a crossover and subwoofers engaged, and a third for casual, full range, all-speaker music listening. After each system memory corrects for room anomalies, an optional music or movie curve can be added to the corrected response for an enhanced listening experience. ARES uses on screen prompts to guide the user through the automatic setup and equalization process. The ARES operational range can also be limited to low frequency correction where a majority of sonic irregularities occur. Settings for operation below 63 Hz, 80 Hz, 125 Hz, and 250Hz provide correction in the most troublesome low frequency range while leaving, unaltered, the upper frequency range that helps define a individual speaker's sonic characteristics.

 

CONNECTIONS AND OPERATING MODES

Via the four HDMI™ 1.4 compliant inputs, the Evolution 707 3D decodes Dolby TrueHD and DTS HD Master Audio lossless surround formats and is compatible with 3D broadcast and Blu-ray content. Additionally, two Cirrus CS497004 DSPs, running in 64-bit dual precision mode, decode Dolby Digital Surround EX, Dolby Digital 5.1, DTS 6.1 ES, DTS 5.1, DTS NEO:6, Dolby Pro Logic II modes as well as nine proprietary Krell Music Surround modes. Maximum color depth has been increased from 24 bits to 48 bits and bandwidth from 165MHz to 340 MHz. Full video transcoding permits any composite, S-Video, or component signal to be routed to the component and HDMI™ outputs and includes upconversion to a maximum of 1080p resolution. Furthermore, the Evolution 707 3D is a true "one connection solution" with on-screen display, configuration menus, and status messages available from all active video outputs. HDMI™ 1.4 is at the cutting edge of today's technology and Krell is the first company to offer a complete solution for reference quality home theaters. The Evolution 707 3D combines unmatched audio and video performance with all of the convenience features today's reference home theaters demand.

"devastatingly big and tight bass, It is as

great-sounding a digital processor as it is an

analog preamp "

Kalman Rubinson - Stereophile

S-1200 3D  / S-1200u 3D

Surround Processor

Coupling legendary Krell preamplifier technology, state of the art digital processing, latest True HD, DTS Master Audio decoding, and HDMI™ 1.4 compatibility, the S-1200 3D is an ideal centerpiece for any high performance music and home theater system. Based on award-winning preamplifier technology, all eight S-1200 3D analog output stages are built to the same exacting standard and feature balanced and single-ended cable connections. Only Krell designed preamplifier circuitry is employed within every channel utilizing discrete current based Class A, direct coupled circuitry for the greatest signal purity and highest bandwidth. Performance robbing op amps or integrated circuits are not used anywhere in the audio path. Preamp mode bypasses all digital circuitry and routes analog stereo inputs directly to a balanced resistor ladder volume control for ultimate music reproduction.

The heart of a Krell surround sound preamp/processors is sound quality. We start with a great sounding preamplifier and then pair that to the latest in surround processing technology. The S-1200 3D includes our finest audio and video engineering plus the latest in HDMI™ 1.4 technology, to insure the ultimate home theater experience for our customers. Borrowing key technologies, the audio signal path is a direct descendant of our Evolution 707 3D Reference Surround preamp/processor. The S-1200 3D also uses the same DSP engine and 1080p video stage from the Evolution 707 3D. Also available without 3D compatibility, the S-1200 and S-1200u presents a purity of sound and video resolution previously unavailable in home theater systems.

 

At the hub of the S-1200 3D digital signal processing is a pair of dual core 32 bit Cirrus CS497004 DSP's performing 1.8 giga operations per second. Digital signals are then routed to 24 bit ESS Sabre DACS.

 

The video content is treated to the same high performance engineering as the audio signals. Maximum color depth has been increased from 24 bits to 48 bits and bandwidth from 165MHz to 340 MHz. Full video transcoding converts composite, S-Video, or component inputs to HDMI™ signals. Furthermore, the S-1200u 3D model includes upconversion to a maximum of 1080p resolution. The S-1200 3D is a true "one connection solution" with on-screen display, configuration menus, and status messages available from all active video outputs including HDMI™.

 

The S-1200u 3D is at the cutting edge of today's technology and Krell is the first company to offer solutions for both reference and high performance home theaters. Like its bigger brother, the Evolution 707 3D, the new S-1200 3D combines peerless audio and video performance with the convenience features required for maximum enjoyment.

 

Finished in classic Krell brushed silver or black anodized Aluminum, the S-1200 3D begs to be seen but can be easily integrated into modern rack mount based systems.

Foundation

Surround Processor

Foundation, is the latest in a long line of state-of-the-art A/V processors from Krell. Featuring the latest digital connectivity, the Foundation also maintains Krell's exacting standards for analog audio reproduction.

 

From decoding the latest lossless audio formats, extensive digital switching, 3DTV pass-through, and more, the Foundation is fully compliant with the digital age. Yet the 7.1-channel processor also features balanced audio outputs, automatic setup and room EQ, and Krell's legendary robust hardware. A slim new form factor exudes the Krell aesthetic, while allowing placement in smaller equipment racks.

 

In addition to 10 HDMI 1.4a inputs, the Foundation has 2 HDMI outputs, both of which feature Audio Return Channel. With ARC, a display device is able to send audio back down the HDMI cable to the processor. This is beneficial for those with televisions with built-in web streaming capability like Netflix or Pandora, so the streaming audio can use the full home theater system instead of just the TV's speakers.

 

The Foundation passes video signals directly without any video processing, ensuring bit-for-bit accuracy of the signal, up to 1080p/60. However, to simplify cabling, setup, and use, there is full transcoding of the 2 composite and 3 component analog video inputs to the HDMI outputs.

 

The Foundation includes a new Krell development - Intelligent HDMI switching. Intelligent HDMI switching is a combination of circuitry and innovative software that optimizes HDMI operation. Various parameters including the monitor's electronic ID and source video resolution are stored in non-volatile memory. All 10 source inputs are always active so source, channel, video resolution, and audio format changes are instantaneous. The Intelligent HDMI design provides the fastest signal recognition possible.

 

Krell designed the Foundation with flexibility and ease-of-use in mind, with extensive routing capability of the audio inputs to the various outputs. During setup, the specific paths will be chosen based on how the user intends to use each source, displays, and audio output channels.

 

The Foundation will allow owners to take full advantage of the best audio soundtracks available, with decoding of Dolby Digital, Digital Plus, Dolby TrueHD, DTS, DTS-ES Discrete, Matrix, and DTS-HD Master Audio. In addition, a full suite of post-processing modes are included, including Dolby Pro Logic IIx and DTS Neo 6. Krell's proprietary surround modes, Party, General Admission, Front Row, and On Stage, offer a different way to listen to favorite tracks.

 

The Foundation also features Krell's Automatic Room Equalization System (ARES), to ensure the best possible performance from every theater. ARES analyzes all the speakers in the system, their location, phase, and distance from each other, to determine the best crossover frequency, delay, and more. In addition, ARES incorporates the acoustics of the room to determine unique EQ curves for each of the 7.1 output channels. Unlike other room EQs, ARES can be programmed to only adjust the troublesome low frequencies, leaving high frequencies unaltered.

 

To allow full integration into a home automation system, the Foundation has Ethernet control, RS-232, 4 12v triggers (2@0.5A and 2@60mA), and RC-5.