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DSP520 installation
Increasingly, home theatre installations
call for in-wall loudspeaker designs,
and Meridian’s existing DSP inwall model, the DSP420, has been
one of the company’s most popular
loudspeaker since its introduction.
To satisfy the requirements of a
broader range of applications,
Meridian has introduced two new DSPbased full-range in-wall loudspeakers:
the compact DSP520 loudspeaker, and
the larger DSP640.
Sonic inspiration for these new designs
came from the highly-praised M6
loudspeaker released in 2012. This tall,
conical loudspeaker features a 140mm
bass driver and an 85mm wide-range driver,
and the same drivers are used in different
combinations in the current in-wall systems,
giving them impressive performance on many
levels, including superior mechanical integrity,
increased bass and reduced upper mid-range
colouration.
The DSP520 features a single wide-range
driver and single bass driver, like the M6. The
larger DSP640 unit includes dual bass and
full-range drivers.
The new DSP In-wall loudspeakers have
been developed specifically to deliver
wide dispersion for maximum listening
area, with minimum unwanted diffraction
thanks to careful baffle and grille design.
The on-board DSP provides thermal and
dynamic bass protection while retaining very
DSP In-Wall Loudspeakers
accurate transients, ensuring that when the
loudspeaker is played at high levels, even
over prolonged periods of time, it always
delivers a clean, detailed and accurate sound.
The loudspeakers can be mounted vertically
or horizontally, in a wall or in a ceiling,
and voicing compensation is included for
installation behind the grille (supplied) or
fabric/screen material. However, they also
include Meridian’s new Centre Elevation
technology to raise the audio image from a
loudspeaker mounted horizontally under the
screen, making behind-screen mounting less
necessary.
Centre front channel loudspeakers are
some of the most important loudspeakers
in a system, as they have to provide clear
dialogue whatever else is going on. Ideally,
the image from the centre front loudspeaker
should appear from the centre of the screen:
yet mounting the loudspeaker behind the
screen compromises the sound especially
at high frequencies, while mounting it below
the screen means the image is unnaturally
depressed.
Meridian’s Centre Image Elevation technology
uses the latest psychoacoustic research to
raise the perceived image location from an
under-screen loudspeaker so that it appears
to come from the centre of the screen or as
desired.
The in-wall designs also include Meridian’s
innovative Enhanced Bass Alignment
(EBA) technology. Normally, the low bass
DSP520 & DSP640
Product highlights
Ultra-narrow (200mm) design
delivers full DSP loudspeaker
performance in-wall
Back-box and frame system allows
simple and easy installation, with
the flexibility to ensure precise
positioning
Loudspeaker array is built into selfcontained enclosure that mounts
into back-box
DSP-based design delivers
superior performance to
conventional designs – equivalent
to an enclosure of eight times the
physical volume.
Features 140mm bass and 85mm
wide-range drivers based on the
M6, for full-frequency response
Enhanced Bass Alignment
enhances bass transient response
Centre Elevation raises audio
image to the correct height
Two full-range models; may be
mounted vertically or horizontally, in
walls or ceilings
All aspects of the design including
baffle and grille have been
developed for maximum dispersion
and listening area plus minimum
unwanted diffraction
Perfect partner for stand-alone
Meridian DSP loudspeakers
and the DSW Subwoofer, with
complementary sound
Grille may be painted to match
interiors
Meridian Audio Limited
meridian-audio.com
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DSP In-Wall Loudspeakers
DSP520 & DSP640
in a loudspeaker system arrives late: this
smears transients and muddies the sound.
Enhanced Bass Alignment uses two different
technologies to time-align high, mid and
upper bass frequencies with the low bass,
resulting in audibly improved bass transients
and added life and clarity. Only a fully digital
DSP-based loudspeaker system like those
pioneered by Meridian is able to provide the
complex signal processing required by EBA.
The use of a wide-range driver across the
speech band helps create a loudspeaker with
an effortless sound that remains clear, open
and spacious, even at high listening levels.
Meanwhile, the bass end is crossed over at
200Hz, just as in the flagship DSP8000,
with a full-scale high-resolution Meridian
DSP crossover. Meridian’s unique suite of
proprietary technologies provides a lifelike
sound at all volume levels. DSP processing
throughout delivers a level of performance
matching that of a conventional loudspeaker
of eight times the physical volume, while
an ‘apodising’ upsampling filter delivers
maximum digital audio quality.
Both products in the current range include
powerful amplifiers, one for each driver. A
100W Class AB amplifier powers each widerange driver, while a 150W Class D amplifier
powers the bass drivers. These amplifiers
have been designed to operate comfortably
and run perfectly cool, even at the highest
listening levels.
Each unit is built into a completely integrated,
narrow (total 200mm wide) all-metal frame
enclosure system, with a carefully-calculated
internal volume to provide the required
acoustic characteristics for the drivers. This
self-contained enclosure mounts to a frame
which is in turn mounted into the fireproof
rough-in box, which is designed for mounting
into new-build partition and stud style walls
and provides power and SpeakerLink signal
I/O. It can alternatively be retrofitted into stud
or brick/stone-built walls. The loudspeaker
enclosure itself then mounts on to the frame,
and the perforated steel grille attaches
to rubberised magnets in the aluminium
extrusion that forms the front panel of the
loudspeaker enclosure.
The rough-in box kit includes a template to
determine mounting positions, plus a mask
to protect the box during plastering, etc,
ensuring simple, flexible and easy installation.
The drivers are mounted into the front
extrusion of the enclosure itself, while a
separate upper case holds the electronics,
consisting of DSP, digital audio converters
and amplification. The front of the extrusion
carries the on/off rocker switch, fuse holder,
an infra-red receptor window and a threeway (Left-Centre-Right) channel selector
rocker switch. When switched to Centre, the
loudspeaker equalisation is optimised for
horizontal centre use. A LED indicator shows
the loudspeaker power status.
Inspired by aspects of the design of the M6
free-standing loudspeaker, and as a result
of the flexibility of Meridian’s award-winning
DSP approach to loudspeaker design, these
DSP in-wall models have a complementary
sound to that of Meridian’s free-standing
loudspeakers and can be easily mixed and
matched with free-standing Meridian models.
If additional bass reproduction is required,
they can be augmented by the DSW freestanding subwoofer in the same way as other
Meridian loudspeakers.
Outline Specifications
Input
• Meridian SpeakerLink connector (RJ45)
Output
• Meridian SpeakerLink connector (RJ45)
Drivers
• 85mm wide-range & 140mm bass
• DSP520: one of each; DSP640: two of each;
Amplification
• 1x 100W Class AB amplifier per wide-range
driver
• 1x 150W Class D amplifier per bass driver
Construction
• All-metal construction throughout, consisting
of back-box, mounting frame, aluminium
extruded baffle with rear enclosure and front
steel grille
Dimensions
• Visible grille on wall all models:
W x D: 222.5 mm (8.73 in) x 4.0 mm (0.16 in).
H DSP520: 820 mm (32.28 in);
H DSP640: 1251.3 mm (49.25 in).
• For wall cutout and rough-in box dimensions,
see engineering drawings and installation
instructions
Front panel
• On/off rocker switch, Fuse holder, IR window
• Rocker switch selects left-centre-right
channel operation
• LED indicator shows power status
Power
• IEC mains connector
included in back-box
connects to flying
lead attached to enclosure
Fuse
Right
On
~50-60Hz T5.0AH
250V for 100-230V~
Centre
CAUTION:
Disconnect supply before changing fuse.
Replace with same type fuse.
ATTENTION:
Off
Left
Débrancher avant de remplacer le fusible.
Utiliser un fusible de rechange
du même type.
DSP520
Digital Signal Processing Loudspeaker System
Right
Centre
Left
Digital Signal Processing Loudspeaker System
Fuse
On
~50-60Hz T5.0AH
250V for 100-230V~
CAUTION:
Disconnect supply before changing fuse.
Replace with same type fuse.
ATTENTION:
Off
Débrancher avant de remplacer le fusible.
Utiliser un fusible de rechange
du même type.
DSP640
The paintable grille is magnetically-retained.
All the elements – rough-in box, frame,
loudspeaker enclosure, included scrim and
grille – include room for adjustment so
that the entire assembly can be fitted with
precision into almost any type of wall. See
exploded illustration, right.
DSP640 exploded rendering.
DSP520 DSP640
E&OE. Specifications subject to change
without notice. Original measurements use
SI units. Dimensions should be confirmed
against the original device or dimensioned
engineering drawings.
DSPIW.DS-ENG v2.5 • REƒ • 20130429
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