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Meridian Audio: DSP 520 In-Wall

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Offering the same performance as the multi-award winning M6, the DSP520 brings in-wall loudspeaker performance to a new level. Featuring an elegant profile only 8 inches wide, the DPS520 is perfect for delivering high quality music discretely in any room.

Integral to the DSP520’s design is Meridian’s Wide Range Driver Technology. This technology eliminates the traditional crossover between a tweeter and mid-range driver found in every other design and enables the DSP520 to have unmatched mid-range quality especially with voices.

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The DSP520 inherits the latest technologies from Meridian’s DSP7200 including Enhanced Bass Alignment and Centre Elevation, providing incredibly lifelike and spacious sound. This makes the DSP520 a perfect choice for stereo or full surround with virtually no visual impact to the decor.

Meridian’s In-wall Loudspeaker range was created to provide no compromise performance in an environment where either floor space is at a premium, or a conventional loudspeaker is simply not suited.

The DSP520 takes advantage of new DSP that allows a flexibility of mounting options unmatched by any passive or active loudspeaker. Other in-wall designs are affected by any material placed “in front” of the loudspeaker, including their own grill. The DSP520 has unique DSP settings to allow it to be mounted behind a fabric wall, theater screen, or even its own paintable grill without changing its sound. This provides absolute freedom of mounting without sonic compromise.

Additional DSP is provided to allow the DSP520 to play at very high volumes, without distortion, while protecting itself. This makes the DSP520 the perfect loudspeaker for dedicated theater rooms. 
DSP In-wall based on technology used in Meridian’s famous DSP speakers

Flexible back box adjustments for various wall materials and depths

Paintable magnetic grills 


Digital Signal Processing and active electronic technologies combine to form a space-saving audio system with all the electronics hidden away in the base of each loudspeaker.

On-board DSP provides thermal and dynamic bass protection with very accurate transients, ensuring pure natural sound at all times, even with extended use at high levels.

Bass and wide-range drivers are driven by their own amplifiers for pure, uncoloured sound and puts the power exactly where it’s needed. 

200mm (7.87in) wide
The DSP520 compact in-wall loudspeaker system is the first in a new range of Meridian in-wall DSP Loudspeakers, based around the same advanced driver technology found in the M6 free-standing loudspeaker.  

Build a complete system from Meridian DSP in-walls, or mix and match them with Meridian’s free-standing loudspeakers to create exactly the system you desire. The sound of Meridian DSP in-walls complements that of Meridian stand-alone loudspeakers, making them the perfect partner for each other.  

DSP520 features a wide-range 85mm driver plus a 140mm bass driver. Each driver is powered by its own perfectly matched amplifier for clean, powerful and enveloping sound. Its sophisticated RF500 back-box and frame mounting system makes installation simple and easy, and provides the widest range of adjustments for maximum flexibility. Meridian’s SpeakerLink cabling makes wiring simple too.

DSP Loudspeakers

The traditional setup – amplifiers driving passive loudspeakers – is inefficient, limiting sound quality. Meridian loudspeakers contain a complete, matched audio system with efficient DSP crossovers, multiple DACs and driver-specific amplifiers, giving higher overall quality, less power use, and the performance of a traditional loudspeaker eight times the physical volume.


Traditional audio systems often require large, expensive cables to maintain their performance. Meridian's SpeakerLink uses an “Ethernet style” cable that delivers pristine digital sound and control down a single cable between Meridian components. The result is simple, unobtrusive, and cost-effective cables that are easy to install.

Triple FIFO Buffering

Each sample of a digital recording must remain evenly spaced in time. Unfortunately, timing can vary, especially when reading discs. This is “jitter”, degrading music's sense of space and diminishing realism. Meridian's multiple “First In, First Out” buffering system minimises jitter, ensuring perfect timing and improved clarity. You enjoy a clearer feeling of the instruments and their interrelationship.

Meridian High Resolution (MHR)

MHR was the first approved encryption method for transferring high definition digital audio between components. Previously, it had to be in the analogue domain, reducing quality. MHR allows secure movement of high resolution digital audio within a Meridian system, without compromise, improving quality by reducing cyclic repetition.

Meridian Apodising Filter

Filters are critical in digital audio. Commonly they introduce distortion and harshness because of "pre-ringing". Early digital recordings suffer from harshness too, due to primitive filters. After painstaking research, Meridian developed a special filter that avoids pre-ringing, so it can be steeper, cleaning up the effects of early filters. The result: a better, cleaner sound from recordings old and new.

Wide Range Driver

Loudspeakers use crossovers to “divide” music into bands their drivers can reproduce. This introduces distortion, reducing sound quality – particularly on human voice recordings. Designing a single driver for both mid and high frequencies made a crossover within the vocal range unnecessary, avoiding distortion and reproducing more lifelike vocals at all volume levels.

Enhanced Bass Alignment (EBA)

In a large loudspeaker, low frequencies (bass) play slightly later than midrange and high frequencies. This “smears” the sound and reduces music’s sense of space and realism. Meridian DSP technology adds fractional time delays to the mid and high frequencies in the loudspeaker. Thus all frequencies play in perfect time with one another, for significantly increased realism and enhanced bass transient response.

Centre Elevation

When a centre-channel loudspeaker is below the video display, that's where the sound seems to emanate, not from the screen, detracting from the experience. Loudspeakers behind the screen introduce other problems. DSP in a Meridian centre loudspeaker psychoacoustically raises the sound image to centre-screen – where we expect it for the most involving movie or concert experience.


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Meridian SpeakerLink connector (RJ45)    
Meridian SpeakerLink connector (RJ45)
85mm wide-range & 140mm bass    
1x 100W Class AB amplifier per wide-range driver
1x 150W Class D amplifier per bass driver     
All-metal construction throughout, consisting of back-box, mounting frame, aluminium extruded baffle with rear enclosure and front steel grille    
Front Panel
On/off rocker switch, Fuse holder, IR window
Rocker switch selects left-centre-right channel operationLED indicator shows power status
IEC mains connector included in back-box connects to flying lead attached to enclosure
Visible grille on wall: W x D x H: 222.5 mm (8.73") x 4.0 mm (0.16") x 820 mm (32.28")  

For wall cutout and rough-in box dimensions, see engineering drawings and installation instructions