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MoonRiver Audio Model-404

3300.00€

Ο MoonRiver Audio Model-404 ειναι τηλεχειριζομενος δικαναλος ενισχυτης (σε διαταξη Dual Mono), ισχυος 2x50wrms at 8 ohms. Δεχεται modules: Phono Stage MM/MC και USB DAC. Εισοδοι 5x Line(ή 4x Line, 1x extra Phono), 1x Tape Loop (1x In, 1x Out), 1x USB (for extra dac board. Εξοδοι: 2x pairs Pre Out, 1x pair Speakers. Made in Sweden.

Το προϊόν είναι άμεσα διαθέσιμο

Ο MoonRiver Audio Model-404 ειναι τηλεχειριζομενος δικαναλος ενισχυτης (σε διαταξη Dual Mono), ισχυος 2x50wrms at 8 ohms. Δεχεται modules: Phono Stage MM/MC και USB DAC. Εισοδοι 5x Line(ή 4x Line, 1x extra Phono), 1x Tape Loop (1x In, 1x Out), 1x USB (for extra dac board. Εξοδοι: 2x pairs Pre Out, 1x pair Speakers.

  • Καρτα Phono MM 400€
  • Καρτα Phono MM/MC 540€

Made in Sweden. Εγγυηση Αντιπροσωπειας 3 χρονια. Δυνατοτητα ανταλλαγων και δοσεων.

The 404 integrated amplifier

Moonriver Model 404 is the outcome of a 3-year research, the aim being to achieve incredible performance regardless of price range. The 404 amplifier will extract hidden elements and render textures from within any audio format, with the source, speakers and room to set the limits. Its culture will suit all music, as the Model 404 is by design set to define the faintest nuances of which tone integrity is composed.

A hefty supply section ensures that ample healthy power is available at all times at all stages through separate rails. A fully discrete preamp section serves for acute dynamic awareness, while a high output stage that is custom-optimized for bandwidth and distortion warrants for neutral predisposition and transient fidelity. A laborious selection of components armors the design against tonal alteration, pretentious or not, thus preserving naturalness throughout the shortest feasible path.

Furthermore, an integrated phono stage, a USB DAC, two preamp outputs and a tape monitor loop expand functionality to form an ideally flexible integrated amplifier.

Design & Ergonomics

We had a very clear vision when we conceived the Moonriver 404 amplifier: Classic design with a modern touch; high quality materials such as massive aluminum knobs, solid walnut cheeks, sturdy enclosure; ergonomic user interface.

There are no “shaved” aesthetics here, no display with complicated serial menus and hidden functions, nor a single multi-function knob for “minimalistic” purposes.
The heart of Model 404 is pure and minimal but the interface is user oriented and easy to operate by anyone in seconds with no need to resort to the user manual. Four knobs and three switches give direct access to any function.

Modular Architecture

Moonriver 404 amplifier is modular by nature; it can accommodate an MM or MM/MC phono stage and a USB asynchronous DAC.  Fitting these modules is simple and can take place at any time, on or after purchase.  The USB DAC may also be upgraded with a newer version to meet future needs.

Balance Control

You may find this feature to be vanishingly scarce in audiophile products as a result of today’s “minimalist” design mentality and the various myths accompanying it. However, balance control addresses a common problem; speakers that are positioned in asymmetry, in a non-balanced room environment. It thus provides the simplest tweak towards achieving a proper sound stage.

Living rooms and house furniture are meant to serve everyday life and may not be provisioned with an ideal listening spot, evenly distanced from each speaker to form an equilateral triangle. It is also not uncommon for one speaker to have to be placed nearer room boundaries than the other, having various frequencies boosted in a more or less predictable pattern. More often than not, balance control would come in handy in that it drastically helps overcoming volume level unevenness and in some cases even reclaiming stereo effect and the resulting focused sound stage.

As expected, the way balance control is implemented on the Moonriver 404 amplifier, in parallel, will not degrade or affect the signal in any way determinable.

Discovering the layout

Model 404 incorporates no less than 5 separate power supplies, each featuring overload protection. The power amplifier specifically runs on a dual mono configuration, beginning from separate windings on the toroidal transformer.

Signal switches are implemented via relays, while volume attenuation is trusted on the legendary blue ALPS pot.

A soft start circuit based on a 30A relay ensures that even the on/off switch is thought out to work with virtually no burden or wear for decades.

Components are carefully selected for both suitability and reliability. We make no use of surface-mount in analog circuits, despite the fact that through-hole costs more and requires advanced space management & layout strategies.

Each element utilized has to be of proven stability and sustained higher performance -proficient implementation provided- before making it into our analog paths.

As for the sound, we are not to say whether Model 404 is virtually transparent or inherently forgiving. Voicing it to appreciate the playlist and respect the user at all times has been the sum of all of our effort; a sincere effort to achieve effortlessness.

The Importance of Tape Monitor Loop

Probably most of today’s manufacturers reject the idea of their product featuring a tape loop. At Moonriver Audio, we have concluded that the tape monitor loop is essential. Not only does it add the option of monitoring the difference between recorded and source material at a real time.

It also, and most importantly, makes possible to insert to the chain -at will- a digital or analog room correction processor, a buffer, a noise reduction system or any other line device available to improve the sound of connected sources.

Stereo/Mono Switch

The pristine era of analog recording being long gone, features like the stereo/mono switch have been gradually chased out into obsolescence. Who wants to go back to one when they have two channels? “Less is more” and “more is better”. Well…

As vinyl record revamping climaxes, whether a modern rage, a fashion thing or a real movement, countless monaural pressings emerge out there, often along with their digital… image. Too many of them, among others waiting to be rediscovered, have currently become collector’s items, 78 rpm direct-cut gems being no exception. This is not unreasonable, as what happened between say the 30s and the 80s in terms of both musical interpretation and recording technique is by many considered to be “most of the music” – this sentence doing perhaps no justice to stunning actual developments in creation and reproduction. Stereo/mono switch gives you the chance to enjoy recording art milestones with respect to how they were initially intended to please; in genuine mono, 2-channel, doing away with artificial phase discrepancies induced by mandatory stereo mode.

So, “less” may well be “more”, but better is to have a choice.

Optional Phono Stage

Model 404 comes with two options in the phono stage department; one is MM only and the other is MM/MC selectable. Both follow the exact quality principles that Model 404 is built on. Quality components and massive power supplies are also employed here, to efficiently accommodate very low noise, high performance op-amps.

The gain in the MM/MC phono can be adjusted, simply by changing the dip switches position. The MC input load can be set also, by replacing the original 100 Ohm input resistor with a higher or lower value. No soldering is required.

Optional USB DAC

What was desired for our USB DAC module was not to make an addition rather than an omission; instead we had to be confident of substantially raising the true value and functionality of Model 404.

A new USB DAC is under development for the Moonriver 404 Standard and Reference.

Specifications

  • Inputs: 5 (line 1 and 4 optionally occupied by phono stage and USB DAC respectively, 1 x tape loop)
  • Outputs: 2 x preamp out, 1 x rec out
  • Max output power: 50 W per channel into 8 Ω
  • Frequency response: 10 Hz to 50 kHz
  • Total harmonic distortion: 0.05%
  • Signal to noise ratio: 85 dB (line)
  • Idle Consumption: 22 Watts
  • Dimensions (mm): 430 (W) x 390 (D) x 135 (H)
  • Weight: 12 kg

Downloads

Reviews & Awards

HiFidelity Poland

MOONRIVER AUDIO 404 RECEIVED BEST SOUND AWARD FROM HIGH FIDELITY MAGAZINE AT AUDIO/VIDEO SHOW IN WARSAW, POLAND 2019
read the full review

HiFI+

review by Chris Thomas
"The way that the 404 reveals the musical embellishments, especially in the low mix, is really impressive as is the depth and articulation of the whole soundstage. It has a way with strings that often draws people to tube amplifiers. The warmth and smooth envelope of the notes and the lack of astringency are really notable [...] But this is an amplifier with impeccable balance and poise. Criticism seems harsh as it is such a well rounded design. I have certainly heard amplifiers costing far more that are not significantly better and every design has its limitations. But, considering the very attractive price and the performance offered it just has to be a recommendation from me".
read the full review

6moons

review by Srajan Ebaen
"The 404 Reference combines a dynamically very loaded gestalt with heavy mass. Despite low wattage figures, that combination acts like a muscle amp. High voltage
gain means quick torque on the throttle [...] In very meaningful ways, his 404 Reference is what in the natural order of things often becomes the ideal of well traveled audiophiles tired of the endless chase. They want to settle down with something solid, reliable, fully satisfying and simple [...] In that sense, today's Moonriver integrated is a perfect end-game amp with a very gutsy sound and a flush hand of winning features. "
read the full review

EAR Magazine

review by Chris Kelly - Editor's Choice Award
“Everything I played felt like a live performance, and gave me another level of emotional connection to the music. […] I really felt that I was hearing deep into the recordings, with every instrument in its rightful place […] I genuinely believe that every other aspect of the design, the component selection and the manufacturing have been executed in an exemplary fashion. The team behind it are not just exceptional engineers but are also very obviously music lovers themselves. I am lucky to have a lot of great hi-fi come and go through my system. Much of it I have admired, much of it I have enjoyed, but most of it is packed up and returned with gratitude but without regret. I shall be genuinely sorry to see the Model 404 depart. If I was in the market for a new amplifier this would be at the top of my list. I can’t wait to get my hands on the Reference model – the mind boggles as to how good that is going to be!
read the full review

Stereophile Magazine

review by Jason Victor "A Dreammaker From Moonriver"
"A Roon search led me to Trio Tapestry (Qobuz 24/96 FLAC), which is led by saxophonist Joe Lovano with Crispell and percussionist Carmen Castaldi (Qobuz 24/96 FLAC). I couldn’t believe how realistic Castaldi’s gongs sounded on “One Time In.” On “Seeds of Change,” sonics and musicianship were mesmerizing. The varied heights of instruments in the deep and spacious soundstage were enthralling. Everything felt so right that there was nothing to do but bliss out.
I wrote at the beginning of this review that the Moonriver 404 Reference is the least expensive integrated amplfier I’ve had in my system; that makes it difficult for me to proclaim the Moonriver 404 Reference integrated amplfier a new benchmark for sonic excellence in an integrated costing $5000 or less. But I’m tempted to anyway, because it does justice to complex and demanding recordings and it sounds tonally spot on, well balanced, clear, and musical.
For some of you, the Moonriver 404 Reference integrated may be the longed-for component, just waitin’ round the bend, that transports you to audio nirvana. With dutiful attention to setup and component matching, the Moonriver Model 404 Reference integrated amplifer can deliver Class A sound at a Class B price, and joyful listening".
read the full review

Posi+ive Feedback

review by John Marks
"It sounds more powerful than 50 Watts. It was also very dynamic, from the smallest gradations of chamber music, to large-scale orchestral works. However, I think that the most important characteristic is the coherence of the sound. I don't want to use the word "smoothness," because that might give the impression of rounded-off highs. The highs are not rounded off. And that's certainly not what the designer intended, because the small script word "fågelsång" on the front panel means "birdsong." There is a very organic "togetherness" to the sound. Both in the time domain, and in the frequency domain. After one of the listening parties, one participant remarked that it was a true measure of how great an audio product the Moonriver 404 is, that nobody really had any comments to make about it. They just listened to it, and enjoyed the music.
To sum up: Highest Recommendation".
read the full review

ΔΩΡΕΑΝ ΑΠΟΣΤΟΛΗ ΣΕ ΟΛΗ ΤΗΝ ΕΛΛΑΔΑ

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