Meridian Audio G-91-A Brochure
G91A DVD Audio/Video Player Controller Tuner
Ideal heart of a stereo or
multichannel audio/video
system
Includes both multichannel
analogue & digital outputs
Drives digital speakers or
analogue amps directly
Plays almost all CD and DVD
format discs
Multiple analogue and
digital inputs
Powerful video processor;
HDMI out at up to 1080p
Digital upsampling and buffering delivers a spectacular
improvement in quality
T RI F IE LD
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 rackmounted, 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, widebandwidth 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 softwaredefined: 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.
ROM drive improves errorcorrection over ten times
AM/FM RDS tuner or DAB
Digital Radio with FM
The G91A is a development of the original
G91, already one of the most versatile members
of the G Series family, adding multichannel
analogue output capability to the prodigious
capabilities of the G91.
The G91A is a DVD-Audio/Video player with stereo or multichannel capability and built-in tuner,
and offers an even more versatile alternative to
the G91. Like the G91, it plays audio CDs, MP3
CDs, Video CDs, DVD-Video, and DVD-Audio
discs including the DVD side of DualDisc hybrids.
It can decode Dolby Digital, DTS, MPEG, MP3,
and MLP data streams to PCM for stereo, and in
some cases multichannel, playback, and it can
optionally output Dolby Digital, DTS, and MPEG
bitstreams for connection to a surround controller such as the G68.
The G91A incorporates a two-channel preamplifier with two coax digital inputs, two optical
inputs, and three analogue inputs. It provides
analogue and digital multichannel and fixed
auxiliary digital stereo outputs. Digital signal
processing is included to upsample (stereo only)
decoded streams, or decode surround bitstreams
from external sources. It also includes a highquality FM/AM tuner with RDS/RDBS (G91A
model), or a DAB/FM tuner (G91A-DAB).
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.
In stereo mode, the G91A is designed to
connect directly to a pair of analogue active
speakers, or power amplifiers and passive
speakers. Alternatively, it can be connected to a
pair of Meridian DSP Loudspeakers to create a
complete two-channel AV system.
G91A DVD Audio/Video Player Controller Tuner
The illustration right shows the G91A at the
heart of a compact, all-digital, Meridian-based
stereo DVD system. The Meridian DSP loudspeakers take their feed from the G91A’s digital
preamp outputs, with the speaker volume
controlled by the G91A’s front-panel knob via
the communications link, or via the remote. The
G91A will also drive a stereo analogue system,
for example with a G56 or G57 power amplifier
and your choice of passive speakers, or active
loudspeakers like the M420 in-wall designs.
In addition, the G91A will drive a complete
5.1 system comprising either digital speakers
or analogue amps and conventional speakers
– or any combination of the two (see panel
opposite).
With three stereo analogue inputs and four
stereo digital ins (two optical and two coax),
the unit will support a wide selection of inputs,
and when playing a multichannel disc as part
of a stereo system, the surround information is
expertly downmixed to stereo.
G91 (above) with G68
The G91A’s multichannel digital output allows
connection to a surround controller such as the
G68. Alternatively, the digital and/or analogue
multichannel outputs can be used to create a
powerful 5.1 surround system based on Meridian DSP Loudspeakers or conventional analogue
amps/speakers – or a combination of the two.
Here the G91A really comes into its own: as the
heart of a complete surround system.
The G91A includes a powerful video processor
and scaler which can simultaneously provide
composite and S-video outputs, plus
progressive component video and up to 1080p
on an HDMI v1.1 output. It provides two
composite, three S-video, and one interlaced
component video input, all of which can be
routed to any of the video outputs with appropriate scaling.
At the centre of the G91A is a high-speed
computer-style DVD-ROM drive – the best type
of drive to use to ensure accurate data recovery
from all types of disc. The drive normally operates at standard speed; however, it is capable
of recovering data a great deal faster when
required, enabling it to make more attempts
to recover accurate data from a problem disc.
Because of this, the drive can perfectly recover
the data from almost any compatible disc.
Unlike other players that use a mechanical
approach to attempt to lower jitter by minimising drive vibration, the G91A employs a triple
buffering system to minimise jitter, maximizing
HF transparency and sound stage precision and
stability. The result of this sophisticated approach is that the players deliver ultra-low jitter,
with sound and picture quality second only to
Meridian’s 800 Reference DVD/CD Player.
The digital electronics as a whole are driven by
a new design of high-stability clocking system
which further reduces jitter and ensures that
the highest level of detail is recovered from a
disc. All digital data is accurately re-clocked, and
multiple power supplies ensure that digital and
analogue circuitry are kept separate.
The G91A includes a comprehensive front-panel
user interface which allows access to all the
features of the unit. The player can be set to a
standard ‘Type’ which configures all the required
settings as required for a particular application.
In addition, an on-screen display (OSD) allows
you to configure specific settings individually.
The player employs Flash ROM memory for the
operating system, so software updates can be
downloaded from the Internet and installed via
a PC connected to the serial port on the rear
panel. The serial port also allows full remote
control and configuration of the unit.
The G91A provides three principal S/PDIF coax
outputs designated L/R, L/R Surround, and
C/LFE. These typically connect to Meridian
processors, or feed a stereo signal to a pair of
DSP Loudspeakers.
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