PIEGA Master Line Source 2 (Baffle anodised black/Zebrano), Master Line Source 3 Baffle 56a92f581251303821e496948dba5068.pdf

PIEGA Master Line Source 2

High-End loudspeaker with dipole and diffuser.

PIEGA Master Line Source 2

When the Swiss audio specialist PIEGA revealed the dream

loudspeaker Master Line Source in the autumn of 2013, in-

dustry experts experienced a ‘wow’ moment: What the four

human sized acoustic transducers offer in terms of tonal

finesse induced editors of the international trade press to

spout effusive superlatives that are otherwise only rarely en-

countered. The German newspaper Frankfurter Allgemeine

Zeitung, for instance, wrote: “This equipment is among the

best that loudspeaker engineering has to offer”, while the

Swiss AV-Guide wondered: “Have I, in my entire career as

an audio journalist, ever heard anything better?” And the

online magazine hifisenses.com from Singapore asserted:

“The Piega Master Line Source is one speaker that I recom-

mend fellow audiophiles to have a listen to”.

But the all-important originator of the super loudspeaker,

PIEGA’s Head Developer, Kurt Scheuch, was not slow in

secluding himself in his workshop again to tinker with a

smaller version with similar acoustics that could also be

integrated into standard living rooms – and thus Master

Line Source 2 was born, the result of a close cooperative

alliance with the designer Stephan Hürlemann.

Symmetrical line source

Like its epic prototype, the MLS 2 also operates on

the symmetrical line source principle. This involves four

mid-range speakers and tweeters, mounted one above

the other, emitting sound in a vertical, cylindrical con-

figuration rather than – as is standard in conventional

loudspeakers – spherically. Audio signals thus reach

listeners directly, without being reflected from the ceiling

and floor, thus producing an exceedingly clear and de-

tailed sound pattern. But the playback of the high and

mid-frequency signals via multiple drivers and thus a large

membrane surface (the tweeter membrane is, overall,

around 50 times the size of a dome tweeter!), with its ext-

remely low distortion, high level of efficiency and significant

dynamism, offers further advantages, thus guaranteeing

markedly natural and detailed playback.

The ribbon systems of the MLS 2, termed the line source

drivers, operate with centrally positioned ribbon twee-

ters that cater to all frequencies above 3 kilohertz. They

are flanked on either side by mid-range ribbons that

take care of the emission of all sounds up to 500 Hz, in

other words, that reproduce the entire frequency range

– deviations and all – that most instruments and voices

reproduce. With the exception of basic dimensions,

which correspond to the familiar C1 mid-range twee-

ter from the PIEGA Coax series, the magnet system,

baskets, film layout, film material and ribbon damping

applied using etching technology have been developed

from scratch.

Acoustic lens with backward lamellae

While the four line source drivers emit sound forward direc-

tly, as has been described, the sound emitted backward

consistent with the dipole characteristic is transformed

into a wholly diffuse sound field by way of an elaborately

engineered acoustic lens. Using diffraction and reflection,

lamellae composed of painted MDF distribute the sound

so expansively that it is only possible to place a dipole

speaker within a space as a conventional loudspeaker if

the MLS 2 is deployed.

In order to uncompromisingly realise the drivers’ high qua-

lity and lack of distortion, as well as the acoustic qualities,

utmost care has been taken to ensure a lack of vibration in

the housing. The entire loudspeaker baffle has been milled

out of a solid aluminium block and boasts impressive

stability and damping. The entire surface of the 10 mm

thick aluminium baffle is glued to the actual housing.

This consists of a composite of medium-density fibre

boards (MDF) and the viscoelastic heavy-duty film Idikell –

an extremely solid and rigid structure, which provides the

two PIEGA woofers, which have also been developed from

scratch and which measure 220 mm in diameter, a perfect

operating environment. The woofers, oscillating in a 64-litre

volume setting, achieve a lower cut-off frequency of 20 Hz

thanks to their long-throw magnet systems that are confi-

gured for optimal pulse response and their extremely rigid,

coated aluminium membranes. Both are supported to the

fore by radiating bass chassis actively set in motion by the

amplifier by way of two rear, passively oscillating radiators,

which – like a bass reflex system – ensure enhanced impetus

in the lower frequency regions.

The PIEGA Master Line Source 2, available in four different

cabinet variants, thus meets all the preconditions for esta-

blishing itself as the epitome of Swiss engineering, crafts-

manship and audio technology in the premium, high-end

loudspeaker segment.

Technical Data

Model PIEGA Master Line Source 2

Design principle

Dipole 3-way system with acoustic lens

Recommended
amplifier output

20 – 500 watt

Sensitivity

92 db / W / m

Impedance

4 ohms

Frequency range

20 Hz – 50 kHz

Equipment

4 x Line Source Drivers
2 x 220 mm UHQD basses
2 x 220 mm UHQD passive membranes

Connection

Bi-Wiring / WBT

Dimensions (H x W x D)

176 x 32 x 43 cm

Weight

93 kg

Design variants

Baffle in silver anodised aluminium,
cabinet painted in silver

Baffle in black anodised aluminium,
cabinet painted in high-gloss black

Baffle in white,
cabinet painted in high-gloss white

Baffle in black anodised aluminium,
cabinet in Zebrano matt veneer

Special design variants upon request

Service

PIEGA offers first-rate service and a six-year

warranty on all loudspeakers, as well as a

three-year warranty on electronics.

PIEGA SA

Bahnhofstrasse 29

CH-8810 Horgen

Phone [phone]

Fax [phone]

[e-mail]

www.piega.ch

Export information

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Published April 2016

Subject to modification, especially

technical modification. Errors excepted.

Service