Naturally, we have compared the two configurations and concluded, without hesitation, that the more expensive 2-box set quite clearly outperforms the basic version. But of course, the original is hardly found lacking in attributes: surprisingly refined timbre for the price, lifelike dynamics, exceptionally airy stereo images. Completed by the X-2 outboard PSU, the Obelisk Si gains not only power (2 x 50W instead of 2 x 35W), but sounds more spacious and effortless, adding breath, colour, and nuance, bringing it comfortably into the realm of far more expensive models of the highest pedigree.
The music is effectively rendered with fidelity and realism rarely heard in Hi-Fi.
No note seems to emanate from the complex calculations of a computer - that is, a succession of 0s and 1s made by an electronic circuit laden with transistors, capacitors and resistors – but, rather, directly from the vibration of the air generated by a musical instrument. Voices and chords demonstrate amazing beauty, from the initial precision attack through the progressive diminishing of the notes.
The resonance, the acoustic ambiance, the tiniest nuance of vibrato, all phenomena essential to perceiving music in an effortless fashion. The concert at home.

For this most spectacular musical performance, the Heed Obelisk Si was rewarded with the prestigious accolade CHOC of the French music&hifi magazine Le Monde de la Musique.

Power & Finesse

It is a rare occurrence indeed that a component under review sets itself so far apart
from the pack. Is this the fruit, for the time being, of a real musical culture claimed in this case, by the Hungarian? It can never be stressed enough that the development of the best products cannot be achieved without aesthetic purpose, and furthermore, without subordination to the music. This explains the preeminence of English devices and perhaps only a certain very few models from our part of Europe.

From the first note, we are stunned by its silken quality, particularly noticeable on the strings that suddenly begin to breathe naturally. By comparing the Obelisk to our dear Etalon ("Diapason D' Or" award winner; of Hungarian origin also) we clearly prefer the Obelisk. It is unquestionably more refined, while preserving the indispensable freshness and undeniable wealth of those aspects that comprise the charm of the Etalon. Its frequency response glides along on the edge of perfection, demonstrating impeccable harmony throughout the spectrum. The Obelisk deftly negotiates dense passages with aplomb, yet is always accompanied by finesse and simplicity, indeed, consider the best tube amps. It is much closer to the "live" magic of a reference-quality 300B than it really has any right to. Stereo imaging is resolutely three-dimensional, wonderfully spatial, all the while delivering an absolutely precise rendering of source material. Its character satisfies fully, providing the highest resolution imaginable, but without the slightest hint of artificial brightness. Finally, the Si’s dynamic range approximates the spontaneity we hear attending a live performance, evoking the very same impression. A genuine revelation at a price, after all, without competition.

		And just two short months after this review was published, the Heed Obelisk Si was named recipient of the coveted Diapason D’Or Award for 2008.

Heed OBELISK Si and X-2 reviewed by Ghislain Prugnard

May/June 2008

Have a good look at this amplifier. Not only its Hungarian origine is not common, but it may remind you of something. In any case, we are almost positive that you are going to hear a lot about it.

First of all, it's great to discover a component that comes from a country rarely cited for
its electronic designs. Then, let's say it straight away, we fell in love with this small integrated amplifier at first sight.
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As it is, even without the X2 power supply, it is incredibly "healthy" even on demanding loudspeakers, giving an impression of quasi instantenous naturalness and musical fluidity........the key asset of this device is, without doubt, the unimitable way it has of blending in with any type of music with exceptional respect of the rhythm and the nuances.

Conclusion:
This is the type of device we adore. Still affordable, it always seems to be there to serve the music, all kinds of music. It does it with exceptional rhythmic consistancy, without exaggeration or artificial coloring, so much so that we end up completely forgetting it's there. A little jewel to discover in France!

Heed is still unknown in France, but we are ready to bet that is going to change soon. 

.................

It has fantastic musicality which means that during the very first minutes of listening we  concentrate solely on the music.......It seems to match all loudspeakers magically.

Beyond these comments, an immense pleasure remains which the Heed Obelisk Si seems to endlessly distil, with as much ease and bliss for itself as for those who are listening......Here is truly, in the real sense of the word a "musical" amplifier. And capable of pleasing absolutely everyone - without any petty quabbling!

VERDICT:

If you want to find out what a "musical" amplifier is like, run to listen to the Obelisk Si.
A truly brilliant amplifier!

...the Obelisk does deliver a crispness and attack that is convincing. It makes metal instruments sound more real and allows good contrast between loud and soft notes.
It suits acoustic material very nicely, if the speaker is evenly balanced. It is also very musical, which is what Heed claims to be aiming for and seems to have succeeded in delivering.

Despite facing some strong competition at its price point, the Heed Obelisk warrants your attention. It really does make that solid-state valve-sound a little closer to reality.