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Brutalis47
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Bruger siden: 09 Januar 2006
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Sendt: 02 Marts 2010 kl. 20:11 | IP-adresse registreret  


Introducing the Rega ISIS flagship CD player

We are very proud to introduce the 7th generation of Rega CD player .

A product manufactured to the highest achievable quality inside and out, Rega's own unique CD technology, genuine black chrome lid and front facia, a custom solid anodised aluminium case weighing in at a notable 19kg ! We hope you enjoy this very special CD player; we have spent a very long time creating it, drawing on our many years of experience in specialist Hi-Fi manufacturing.

Technology behind the design of the Isis

One important design goal was to take the current output, with no internal amplification within the D to A converter, and convert this to an analogue voltage, using discrete class A operational amplifiers and filters. This circuit can then be optimised for sonic performance. (With most CD players the use of standard operational integrated circuits locks you into the sound of those particular integrated circuits, thus narrowing the scope for improvement).

The class A current to voltage conversion amplifier evolved out of the development of the first stage of the Rega IOS MC amplifier.

It shares identical demands of low noise, high drive capability and gain bandwidth required of the voltage to current amplifier.

Careful choice has been made for every component in the digital and the analogue signal path to ensure the integrity of the signal.
The analogue and digital sections are bonded together using a substantial ground plane. It was found during the development of the player that
adoption of RF ground plane techniques aided the sonic quality and therefore were included in the final design.

Careful design of the PCB's ensures isolation of not just the digital and analogue sections, but also the motor, display and user interface processor.

All sonically critical electrolytic capacitors have been by-passed with polypropylene or polyester film capacitors.
In addition to this, large value electrolytic capacitors have also been by-passed with audio grade electrolytic capacitors.
Power supply impedances in the digital to analogue converter are kept very low by the use of solid polymer capacitors.

All power supplies utilise custom Rega K-Power smoothing capacitors, along with fast diodes which have been used throughout in power supply rectification.

The Isis uses enhanced and optimised control code for the control of the CD processor and user display.This speeds up the initialisation process by means of a tighter control interface between the user micro and CD processor.

Analogue section
The analogue section employs two Burr Brown PCM1794 digital to analogue converters, running in a parallel dual mono mode, driving a high performance discrete class A current to voltage amplifier.

This combination generates an exceptionally wide dynamic range, low distortion, and linear signal. This drives an enhanced discrete class A output amplifier. The circuit is fully balanced from the digital to analogue converters to the balanced analogue XLR outputs. The analogue stage has its own dedicated 50VA mains transformer which ensures galvanic isolation between the digital and analogue sections of the player. You will find 10 separate power supply regulators are used in the analogue circuit and each individual amplifier stage has its own dedicated low noise voltage reference.

Digital section
The digital section is blue printed and selected, with major improvements to the mechanism, optical amplifier, DSP core, PLL, master clock & motor power supplies. Another 10 separate power supply regulators are used in the digital circuit. The motor, user interface processor & display also have their own power supply. The digital stage also has its own 50VA transformer again ensuring galvanic isolation. The mechanism is graded and matched to the servo circuits, to ensure the servo and optical amplifiers are working at their optimum point, improving error correction and playability. The headroom of the optical amplifier has been improved by 10% by increasing the voltage in the power supply.

Digital
This revolutionary player has been five years in design. Rega, together with its design partners have pioneered a highly advanced servo controller that uses the latest signal processing techniques to ensure that the raw data that is recovered from the disc is of the very highest quality. Because our fully digital servo can use highly advanced algorithms the laser spot is kept in the optimum position for data recovery in terms of focus, size and tracking.

Extra Error Correction
Previous chip-sets always made compromises on error correction. Formerly it was possible to have good jog resistance or better musical performance.
The Rega chip-set allows optimum musical performance and optimised jog /vibration resistance.

Super-stable phase lock loop

The entire IC is clocked via a very special PLL of our own design. This allows better CD data recovery as well as a big improvement in the quality of the data delivered to the DAC.

Low noise digital design
In the design of our CPU IC we went to great lengths to ensure that the data and address bus noise was kept to an absolute minimum. This ensures the ground and signal connections to the DAC are as 'clean' as is possible.

USB Input

Allowing direct connection to a laptop or PC via a USB A-B lead to stream internet radio Mp3 or WMA files directly from your computer via the high quality ISIS internal DAC.
The USB input uses an isolated double-clocked USB interface, which permits the digital to analogue stage to be used with a computer USB interface and it's own regulated power supply.
The USB benefits once again from galvanic isolation from the main circuitry of the ISIS player which eliminates the flow of earth currents between the CD and host computer, and eliminate computer power supply noise.

Disc Analysis
The ISIS will analyse each disc on an individual basis. During the initialising period (rather like the engine management system on a modern car which optimises the engine settings to temperature, fuel quality etc.) the ISIS will adjust itself to each disc in order to give optimal trouble free reading. For this reason the ISIS will often play discs with marks or scratches that other players cannot read.

 

Så er vi vist snart i mål....Har store forhåbninger til dette pragtstykke...

mvh Brutalis



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Brutalis says:"Hellere rig og rask end syg og fattig"
    "Hellere Rund & Glad end ingen aftensmad".

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Brutalis47
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Sendt: 02 Marts 2010 kl. 20:13 | IP-adresse registreret  

Undskyld skulle have skrevet ISIS..

 

mvh Brutalis



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Brutalis says:"Hellere rig og rask end syg og fattig"
    "Hellere Rund & Glad end ingen aftensmad".

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Brutalis47
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Bruger siden: 09 Januar 2006
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Sendt: 02 Marts 2010 kl. 20:21 | IP-adresse registreret  

Her er så testen over en af tidens bedste cdafspillere...>Brutalis

The Rega Isis CD Player

Rega goes for the gold with the ISIS CD player/DAC
By Jeff Dorgay

Rega has established a solid reputation over the last thirty years now for building reasonably priced components packed with value beyond their price point. Rega turntables have always been a triumph of function and simplicity, with a legion of fans that span the globe. Founder Roy Gandy is a champion of giving his customers high performance without a high price tag, and didn’t even start building CD players until about ten years ago. His sense of humor is evident in their website, where it’s mentioned that Rega was “the last major high end company to build a CD player.”

About that same time Rega also introduced the P9 turntable. Then $4,000 and now $5,000, ten years later (with the tonearm upgraded from the RB900 to RB1000 status), this was Rega’s only entry into more expensive components. One of my reference turntables for the last few years, the P9 is a very special table, offering performance well beyond its pricetag, just like every other Rega product.

In 2008 that trend was continued with the introduction of the IOS phono stage and later on in the year, the Elicit integrated amplifier. Something was definitely up at Rega. Though still very reasonably priced in market terms, at about $3,000 each, these components were still a considerable step up from the Fono and Brio.

A visit to the Rega factory this year revealed a company more committed to performance and value than ever. Rega is a fantastic mix of 21’st century modernization and early 20th century craftsmanship, with their own spin applied. Towards the end of our tour of the plant, the group I was with was taken to an assembly room where something very different was going on.

A $9,000 CD player, from Rega?

That’s not a typo. Yes, that’s right, $9,000 for a Rega CD player. But it’s a very special CD player. In the past, Rega has always been fanatical about offering the highest value they feel that they can build. Because they only outsource a tiny percentage of their production, they have become very efficient and eliminate multiple sources of markup that eventually get passed on to the consumer.

They have not varied from their chosen path with the ISIS a single millimeter, however the focus has changed somewhat. The ISIS is the first product Rega has built that has not had a target cost attached to it; it’s simply the best player that Gandy and his staff feel they are capable of building, with cost no object. Coming full circle to Rega’s core values, the pricetag is only $9,000. The average Rega customer that’s been raised on P3 turntables and Apollo CD players ($800 and $1,000 respectively) is freaking out at the thought of a $9,000 CD player from their favorite British HiFi manufacturer. Has Roy Gandy gone mad?

If anyone should be freaking out, it should be the manufacturers of CD players in the $20 – $50k range. It’s definitely a contender and in typical Rega fashion, offers value way beyond its price point. Even if you haven’t had the chance to see them assembled at the factory, the minute you open the box, the attention to detail is apparent.Rega crate

The ISIS comes packaged in a very sturdy yet tasteful mini-crate with the ISIS logo cut in the high-density, closed cell foam internals. It gives you the feel that something special is inside, without being extravagant. When you remove the 55-pound (25kg) CD player from the box, you know it. The massive aluminum chassis reveals a look not unlike past Rega players, with their famous “spaceship” top loading door and red LED’s on the front panel, but seriously fortified all the way around.

In addition to the player, a substantial billet remote control is included that is on par with what you would expect with the world’s finest audio gear as well as a pair of high quality RCA interconnects and a substantial power cord. I would value both of these items in the $500 – $1,000 range if you bought them as aftermarket items. A very nice touch I’d say, but I’d love to see you being able to have the option of them being terminated with XLR’s.Rega remote

Which leads us to something else you’ve never seen from Rega, a pair of balanced XLR jacks on the back panel. This takes advantage of the ISIS having fully balanced, differential circuitry throughout. There are also standard RCA outputs for those requiring it. The DAC in the ISIS uses a pair of Burr Brown PCM 1794 D to A converters running in parallel dual mono mode. Analog and digital stages have their own separate power supply transformers and there are ten individual voltage regulator stages in the digital section along with another ten for the analog stage. This is indeed a very serious bit of digital hardware.

Those worried about the viability of the CD format and getting your player serviced in the future, fear not. Inside the owner’s manual, there is a signature from the technician that assembled your ISIS, another tech that QC’d the electrical and mechanical systems and the tech that tested and archived not one, but two spare laser units. I think it’s safe to say that the ISIS will last longer than most of its owners and I appreciate this attention to detail, with CD transport mechanisms getting scarcer all the time.Rega rear view

An outstanding DAC that happens to play CD’s, or the other way around?

As the market for high performance CD players is probably nearing its end, Rega gives you the option to use the ISIS as a USB DAC as well. Personally, I’d love to see an SPDIF input on this player, but considering the recent success of the Ayre USB DAC, I’m guessing this is not a deal breaker for the current crop of audiophiles that are more computer based.

While you might be clinging on to your shiny discs for now, the ISIS gives you the options to go both ways and that’s what makes the ISIS such a great value. The DAC performance of the ISIS was also outstanding when streaming files from my Mac Book Pro via the USB input, which is switchable from the front panel or the remote. The only serious drawback to the ISIS is it’s inability to read 24bit/96khz files and this may be the Achilles heel for someone wanting to make this player part of a more computer based system. With 24/96 files becoming the new standard, this will limit your music choices going forward. Personally, I see the ISIS in the same light that I do my Naim 555, a statement CD player for someone with a large collection of physical media.

Which $800 bottle of wine would you like with your dinner?

With the ISIS in short supply worldwide, the question everyone has been asking me is how does is stack up ultimately to the five figure players I have here as reference components? Damn good, I say. Comparing the ISIS to my reference Naim 555 was an interesting study in presentation. It was a big help that we had the ultra revealing YG Acoustics Anat II speakers around for the duration of the review. As part of a six-figure reference system, the 555 still had the ultimate edge in terms of overall analog-like smoothness, but not by a large amount.

Interestingly, the edge went slightly in favor of the ISIS in terms of tonal contrast and transient attack. When listening to the cymbals at the beginning of “Euthanasia Waltz” on Brand X’s Livestock CD, the Rega player offered slightly quicker attack on the leading edge, but didn’t decay as smoothly as the Naim. However, when comparing the playback of this track to the Wadia 781i, the ISIS had a definite edge in upper end refinement, though it did not have quite the subterranean bass slam of the Wadia. (Neither does the $32k Naim player)

But this level of tonal contrast is what I kept coming back to with the ISIS and I would say that is it’s shining virtue. It has more than enough extension at both ends of the frequency scale to keep the fussiest audiophile happy, with plenty of weight to the presentation, but much like the YG Acoustics Anats, the ISIS has a delicacy about it that few players at any price match. Acoustic instruments have a layer of texture that is unmistakable with the ISIS and makes the player a lot of fun to listen to. Spinning “Down On the Farm” from Guns N’Roses The Spaghetti Incident, you can really distinguish the difference between Izzy Stradlin’s guitar setup and Slash, better than I’ve ever heard on this disc. And of course your favorite female vocals will sound just fine…Rega lid open

Tonal accuracy is also a strong suit with the ISIS. Lovers of acoustic music will notice the extra layer of detail and tonal body that the ISIS provides. Going back through some of my favorite jazz standards from Miles Davis, John Coltrane and Sonny Rollins underscored what a fantastic job this player does at nailing the tonality of acoustic instruments. Naysayers of high end digital will be taken back at how natural this player sounds with violin and piano.

Of course we’re splitting hairs here, but that’s the kind of things that people purchasing five figure CD players do. A bit of madness if you will, but all good fun. The ISIS is a player that allows you to make that last jump to where you become immersed in the music, instead of thinking “this is really good for digital.” Again, there are only a handful of players at any price that achieve this lofty goal.

Perhaps not for the typical Rega customer

The Rega ISIS is a digital audio player that is worthy of being on the top shelf with the world’s best components. I own a couple of those players myself, and after extensive listening and close comparison, this player delivers the goods. If you own one of these players, you probably won’t be trading in your Naim, Wadia or Meridian player for the ISIS, but that’s not who I feel this player is aimed at. If you are someone who has always lusted after one of those $20 – $50k players, but can’t or won’t write that check, the ISIS is the way to go. I’ve had the privilege of listening to most of the world’s best CD players, some with pricetags that you’d swear should be on the window of a Porsche instead of a CD player and I feel the ISIS will deliver 95% of the performance of the five figure players for nine grand. It’s well worth the asking price; If I had to start over, I’d buy an ISIS, pocket the other $20k and go shopping for a nice used Boxster.boxster

With that in mind, the Rega ISIS has stayed true to their core values by offering a product that offers the best performance in its price class. This is why we chose this player as our Digital Product of the Year for 2009. It makes a stellar match to their new OSIRIS amplifier, that will be reviewed in the December issue of TONEAudio. And, yeah it’s that good too.

The Rega ISIS CD Player

MSRP: $8995.00 (USD)



__________________
Brutalis says:"Hellere rig og rask end syg og fattig"
    "Hellere Rund & Glad end ingen aftensmad".

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