Article Index
Martin Logan Electromotion review
Page 2
Sound Quality
Measured Performance
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The crossover still makes an appearance of course; the bass section hands over to the electrostatic panel at 500Hz. The power supply is a diminutive unit with a two-pin mains plug attached along with a length of slender cable to carry the voltage to a suitable input on the back of the speaker. The supply is about the same size as a phone charger.

The speaker inputs are in the form of elegantly designed press buttons, which open up wide enough to accept 4mm plugs and which clamp the input plugs with some force when released. The speakers are also supplied with four rubberised feet, whose rubber tips can be removed to reveal carpet piercing spikes.


The ElectoMotion is a stereo loudspeaker pair, but as you would expect it can be supplied in a form suitable for multichannel applications by adding the EM-C2, a centre channel loudspeaker and the EM-FX2 surround sound speaker which are part of the same range. Of course, there are also subwoofers in the range, and although not strictly necessary much of the test was conducted with a recently introduced REL subwoofer – there’s more on this under the sound quality crosshead.


MartinLogan speakers have always been well presented, but the materials didn’t always suit their function. For example there was time when the frame around the electrostatic panels lacked rigidity, with the result that on listening closely, structural resonances and colourations were audible. This despite the fact that people who should know better always claimed that they were colouration-free because there was no enclosure. Wrong on both counts! The enclosure – or frame in this instance - is made from a combination of aluminium and unspecified composites.


In fact there is more to the enclosure than this. First, as you will have noticed, the panel is very slender side to side – I think narrow is the technical word – but it is quite sharply curved in the horizontal plane. The panel is 35 inches tall, and the fact that it is tilted slightly back means that floor reflections are partly suppressed. The 'curvilinear XStat design' is a fancy way of describing the horizontal curvature, The panel radiusing means that the centre line of the panel bulges out towards the listening seat, and the speaker produces a wider spread of sound in front of the speaker than behind, where the sound is focused into a relatively narrow beam.


Damping the rear radiation can be achieved using drapes or furniture near the rear wall, and because the spread of sound is restricted it is easily damped in the same way if required. Similar observations apply to the sides. As long as the speakers are a foot or so clear of side walls, reflections which would muddle imagery are limited. These comments apply to the electrostatic panel, and not the bass, whose output is not as focused, but in general this will pass unnoticed in practice. The bass driver is an 8 inch unit, high excursion, high rigidity pulp cone unit, designed in house for reflex (port) loading.



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