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Product G68ADV Surround Controller AM/FM Tuner 
Manufacturer Meridian 
Category Cinema Processors 
Price POA 
Picture  
Notes Meridian’s G Series line of high performance digital & analogue consumer audio components feature a stylish cabinet design in traditional black or a sleek silver finish. Designed to be either free-standing or rack-mounted, G Series components build on their predecessors, the multi-award-winning 500 and our flagship 800 Series, and include entirely new circuitry developed specifically for the G Series. Multi-layer boards reduce system noise and improve performance. In products which include video capabilities, broadcast-quality, wide-bandwidth video components are employed for maximum image integrity.G Series units are easy to use. Where appropriate, a knob is included to control volume. The positive-action front-panel keys are software-defined: their legends are presented in the vacuum fluorescent display and change intelligently according to context.Full installation configuration of many G Series components is achieved by running a special setup program on a Windows computer, connected to the G Series unit via a serial link, or direct from the front panel.G Series products also include serial ports for remote operation and configuration, along with infra-red sensor input and trigger capabilities, plus Meridian communications ports. A comprehensive back-lit learning/programmable remote is included with products other than amplifiers. Virtually every piece of audio equipment has its own, characteristic sound. But at Meridian, our intention is to represent the original acoustic or studio event as accurately as possible. The characteristic sound of Meridian, therefore, is clear: it’s the real thing. We achieve this sound in many ways, including careful choice of the right components, the right signal processing, the shortest possible analogue chain, precision digital design and the lowest jitter.The G68 builds on the technology that went into Meridian’s flagship, AAA-rated 861 surround processor. It is a powerful, flexible surround controller with an AM/FM tuner built-in, and represents the centrepiece of the G Series range, with multiple variants available to suit a wide range of applications. At the heart of the G68 is a powerful DSP engine consisting of five Motorola 56367s running at 150MHz – delivering an incredible 750MIPS (million instructions per second). Processing is performed at high sample rates and with 48-bit precision throughout, ensuring that all filtering, processing and other operations are carried out far, far above the limits of human hearing. The G68 is thus a perfect processor for the very latest in digital audio and video, such as DVD-Audio and DVD-Video. For superior audio quality, incoming analogue signals are converted to 24-bit, high-sample-rate digital data via multibit Delta-Sigma converters as soon as they enter the processor, and all digital signals are reclocked to minimize jitter and maintain total data integrity...............................................And that’s just one reason it sounds so good.All versions of the G68 include two 6-channel S/PDIF digital inputs (coax), five stereo Toslink optical inputs, and six more stereo coax digital inputs. In addition, there’s a 6-channel analogue input, and five stereo analogue ins. All the inputs are reconfigurable for an incredible degree of flexibility, and analogue inputs are converted to digital at high resolution – 24-bit, 96kHz.The G68 is not only an audio processor – the video versions make it a superb video switcher too, with broadcast-quality switching and signal handling for the highest quality picture you’ve ever seen. There are four S-video inputs and two outputs; four composite inputs and two outputs; and three component inputs with one output. The G68 combines controller and surround processor functions, meeting the latest THX Ultra 2 specifications and including MPEG, DTS, Dolby, Trifield and Ambisonic decoding, to name just a few. The decoders consist exclusively of our own code, giving them superior integration with the Meridian design philosophy, as well as superior performance. The G68’s ‘Smart Source’ feature continually monitors the digital inputs and automatically loads the correct decoding software for the format, speaker layout and encoding of the incoming signal. This capability is enhanced by MHR SmartLink, which provides a digital link between a Meridian optical disc player and processor, carrying explicit information about the nature of the datastream as well as encrypted high-resolution digital signals from DVD-Audio – the first system of its kind to be approved. Virtually all other manufacturers oblige you to go through a D/A-A/D chain, losing quality in the process.You can also store separate user parameters for each source (such as DVD) depending on whether the incoming signal is stereo or surround, so that any source material is played with the decode of your choice.The G68 includes Meridian Room Correction software, accessed via the computer setup program used to configure the unit via the serial port. This unique feature automatically measures room resonances using a simple microphone, employing powerful DSP technology to build up to 60 high-quality digital filters that limit the reverberation time at resonant frequencies to a value similar to the overall reverberation time of the room. The filters can be examined graphically and numerically, and edited if required. The result is that ‘muddiness’ in the sound is removed, while stereo and surround imaging are dramatically improved. Coupled with this is a powerful bass management system that can handle up to three subwoofers.Multi-zone/recording features include stereo digital and analogue outputs providing independent sources to two additional zones (video versions add two sets of S-video and composite video, with auto-switching and conversion between S and composite). The tuner provides AM (LF/MF) and FM (VHF stereo Band II) reception and RDS, and is fitted with its own 24-bit, 96kHz A/D stage. Digital signal processing provides a sophisticated FM stereo blend/width control which allows the user to minimise noise on a received signal. There is also a DSP-based lowpass filter and whistle filter for improved AM reception.Four versions of the G68 are available. The G68D version does not include video I/O, but provides 10 configurable digital and two analogue outputs, plus a multizone/tape audio capability. The G68ADV version includes 10 channels of digital out with MHR along with 8 channels of analogue output. On the video front, there are two S-Video outs, four S-Video ins, two composite outs and four in, plus component out and three component inputs. The included multizone/tape feature adds composite and S-Video capability. The G68AXV replaces the audio outputs described above with six unbalanced and four balanced analogue outputs, while the G68XXV instead provides eight balanced analogue outputs on XLR connectors.The G68 can be configured with a powerful Windows graphical set-up application (supplied), which allows access to all the unit’s functions and configuration. However, the G68 can also be configured from the front panel, thanks to the comprehensive ‘soft-key’ based user interface which is common to all the G Series components. Five of the seven keys take on functionality intelligently according to context, with their legends displayed above the buttons in the front-panel display. As a result, ‘wizards’ can be used to lead you through the configuration procedure, allowing a powerful degree of customization without having to hook up a computer. Further keys take you back to the top level of the interface (‘Home’), and display different options available at a given level (‘More’).The G68’s firmware can be updated via the serial port, and it is possible for the unit’s hardware to be upgraded by a Meridian service centre.This sophisticated, powerful product is difficult to fully describe on paper – contact your Meridian dealer for a demonstration of the G68 and other G Series components, along with Meridian DSP Loudspeakers, which form an ideal complement to them. G68 Surround ControllerG68 Surround ControllerThe G68 Digital Surround Controller is an ideal complement to the G98 DVD Transport, and provides the basis of a stunning Meridian Digital Theatre system. The units are shown here connected to a pair of Meridian’s top-of-the-line DSP8000 speakers for front left and right, coupled with a pair of DSP420 in-walls for the surrounds and a DSP5500HC for the centre front channel. Any kind of video display device can be supported, whether composite, S-Video, Component (progressive or interlaced) or even the latest interfaces such as HDMI or DVI. With the video processor in the G98, different video inputs are converted to all formats, so there is only need for one display connection. In this analogue alternative to the system shown opposite, the G98 and G68 are augmented with the G55 5 x 100W multichannel power amplifier. The amplifier will drive any conventional passive analogue loudspeakers. The available analogue versions of the G68 include both balanced and unbalanced variants and combinations of the two. A digital output version of the G68 without video is also available.Meridian Room Correction software automatically detects room resonances and counteracts them, utilising awesome DSP power to generate up to 60 filters.Output panel for the G68XXV – compare with the G68ADV overleaf. See specifications for details. 
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