Lexicon DD 8 in the Test

Lexicon offers a patented eight channel power amplifier with the technique of the mighty Mark Levinson no small DD 8 for 2,800 euros. 53 – in total around one kilowatt power. A masterpiece.

Lexicon is best known for his studio effect processors and surround preamplifier. For several years, the lexicon’s consumer Department but no longer linked as a result of restructuring in the Harman Group the Studio Division, but is part of the Harman luxury audio group, together with Mark Levinson, Revel, and JBL Synthesis.

Synergies which bear visible fruit result from the interaction of these brands. The latest product of the digital specialists is an Eight channel power amplifier called DD-8, techniques, and insights from products of lexicon and Mark Levinson bundles.

About five years ago, Mark Levinson brought out the amplifiers No. 53 : big, heavy, expensive well 50,000 euros per couple, as you hardly expect that ml. At its core was a revolutionary digital power amplifier, which sounded excellent and was a whole momentum of patented techniques and to eliminate some of the typical characteristics of the digital amplifier or at least compensate for understood.

Digital shrink Spa

Together with Texas Instruments modified the developer the circuits of the huge ML Mono blocks in recent years further, to only in two and for the lexicon for the first time in a chip can be DD-8. The first part consists basically of an analog to digital converter called Ruby. The resulting chip 68CTD1KL is used by Harman, for example, for the finest Car-HiFi in Ferraris to control digital power amplifiers.

The Ruby includes among other patented circuits from the originally discreetly built up no. 53 the generation of triangle and a differential circuit for generating an extremely low-jitter clock signal. Now, Ruby finds with a corresponding class-D amplifier in a common chip called Emerald place. This much-legged beetles the size of a thumb nail supplies 150 Watts twice up to thanks to its overall efficiency of well over 90%.

Maximum EF? ciency

The high efficiency of the Emerald Chips means that hardly any heat comes out and he comes out with less cooling. Now plug in the DD-8 equal to four of them and come out in combination with the also highly efficient switching power supply with the amazingly small heatsink and thus possible super compact housing.

It is impressive: Four high end stereo amplifiers, which are specified with 125 Watts into 8 Ohms per channel; plug into the 19-inch housing with only one height unit that adds up to a kilo Watts!

DriveCore is called Harman the technology package. And lexicon developers not just packed it as multichannel power amplifier in a Cabinet. So that the DD-8 is as universally usable, some clever features are installed. It can be used simply as a Multichannel power amplifier in a surround system. She can be activated via a trigger signal from a precursor.

You can use also the signal sensor working, as we know from subwoofers: music arrives, he turns on the DD-8; no signal comes for a while he puts the amplifiers sleep again.

All eight outputs are independent of each other and can be set via rotary knob level. That combined with the clever bus system allows a universal use in multi-zone installations that demand good sound. Each pair of channels can be controlled by the local multi channel input or from the stereo bus.

Hearing test

In the listening room, the hip flask demonstrated how good digital amplifiers can sound: an always effortless-looking image with beautifully balanced coarse and fine dynamics, precisely resolved height and centers, that is perhaps a little different one, but very rich bass are lined. It is not easy to classify the DD-8 into a category, because it belongs to several: BI – / Tri – / Quad-amplified stereo, surround, multi-room… It is universally applicable and sounds fantastic in all situations.

 

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