Download Yamaha CD-S1000 JLTi high-end CD/SACD player w/ JLTi level

Misc
Yamaha CD-S1000 JLTi high-end CD/SACD player w/ JLTi level-2 upgrade
conversion
YAM CD JLTI
NZ$4,500.00 ea (incl. GST)
JLTi Dedicated CD and SACD Player - Features our new type
of I/V Converter. AS NEW LESS THAN 300hrs PLAY TIME
There is still a market for digital players that are dedicated to
playing audio only. This is not multi-channel player nor
playsDVDs. Many are convinced that players designed for audio
only task are better than players that have to play many formats.
Now Level 2 with Positive Feedforward Correction: Before there was Negative Feedback there was FeedForward Error
Correction. While we totally avoid Negative Feedback as a correction technique, resurrecting this and applying the current
conversion has proved to be a revelation. The increase in transparency, openness, lack of audible grain and the ability to hear
deep into the mix is extraordinary. A genuine advancement and increased listening enjoyment.
At the moment this the best Stereo Only Dedicated Player we can supply!
For whatever reason, this new JLTi player does CDs as good or better than any digital player we know of at any price and also
plays sublime SACD disks. But to achieve this level of performance we had to come up with a new solution to an age old
problem, converting 'current' from the DAC to usable 'voltage.' Until a solution was found we have mainly used voltage DACs,
and we avoided the alternative current DACs used in many up-market players. We now have finally cracked this thorny
problem and we are very excited by the results. Truly State-of-the-Art solution can now be applied to current type DACs.
These so-called I/V Converters are often the real blame for what has been termed 'digital sound' or even 'digititis' - as if it was
some kind of decease or affliction.
The problem is caused by the great leading edge and high level of noise that the post-DAC audio circuitry has to deal with. At
very high frequencies, the usual audio circuits (operational amplifiers) have poor headroom and this leads to over-loading. They
are simply overwhelmed. When the circuit is overloaded at high frequencies, it is overloaded, period. The frequency matter not.
When the exposure exceeds the capability of the audio circuit, it causes slew rate induced distortion. This is the weakness of
I/V Converters. It is digital sound.
We had to come up with a bomb-proof audio circuit, one that has a huge bandwidth, low noise, low distortion and no negative
feedback. So what? Aren't others doing just that? Mostly they are not and alternative solutions have been improvements rather
than solutions. We need to think outside the square, and this is our forté.
The conventional I/V Converter is know as an 'Active' converter. It is done by using an opamp (either IC or discrete) and huge
amount of feedback to create a 'Virtual Earth' which emulates a dead short to be seen by the output of the DAC. If you think in
voltage terms this does not make sense. But I assure you, when the output is 'current' then this is actually very logical. But
while it was found that this 'earth' should have no signal (if it was a real short there wouldn't be) when in fact there was always
some signal when observed via an oscilloscope. So what is going on? A Virtual Earth is clearly not perfect and in reality some
signal shows that it must be slightly above zero Ohms. Not a dead short.
So now lateral thinking comes into play: If indeed a small signal is considered acceptable, then why not use 'Passive'
conversion? Now the use of Passive Converter is not knew and we do not pretend anything else. So what is new? Read on
please.
The DAC used in our vehicle, the Yamaha CD-S1000 is the latest architecture Burr-Brown DACs that we are able to use direct
coupled circuitry that elinates the use of extremely expensive coupling caps - the best cap in the world is no cap.
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+64 7 838 8661
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Solution: Aside from coping with the offset current, the actual AC audio signal can be formed across a differential pair of
resistors. This differential current across a very Low Z (impedance) means we can emulate a similar signal and impedance
condition to that of a Moving Coil Phono Cartridge.
Hey, here is a good idea! We already have a leading edge Moving Phono Preamp, the JLTi Phono. So now we can use Phono
Preamp technology sans RIAA Equalisation and bring the output voltage up to the industry standard 2 Volt RMS. This
technology fits the bill perfectly; super large bandwidth, low noise, no feedback and completely slew rate induced distortion
free. Once this occurred to us we just knew we had cracked the problem even before building the first proto-type. The logic was
simply irresistible and the first sample brought a smile to our face - finally after many years, this was it!
So the player's entire post-DAC circuit has been replaced along with its new SuperReg power supplies. Only a two-pole filter is
used that is entirely passive.
REVIEW APRIL 2010:
I"’ve tried to tone down this review due to reader’s perhaps inherent scepticism of bold claims for audio upgrades. However, I
had my Yamaha CD-S2000 upgraded by Joe Rasmussen of Custom Analogue Audio a few weeks ago with the Terra Firma
Lite clock and zero feedback upgrade.
The difference in sound is not small and was a bit of a shock.
The first thing that struck me was how much better the bass was. Deeper, more tuneful and rhythmic. The slam and attack on
rock tracks is fantastic. The stock Yamaha CDS2000 was no slouch as a player but the Terra Firma upgrade takes it to a
different plane.
The soundstage is much more open, dynamic and coherent. The music has much more presence in the room, you just can’t
ignore it. Resolution of detail is excellent. I am a happy customer with this upgrade. It gives the system the ability to really do its
stuff and let the music shine through.
I have just listened to ‘Under My Thumb’ by the Rolling Stones, ABKCO SACD version. I have heard this track loads of times
before but it was truly awe inspiring played back through the upgraded player. No hyperbole, the music is totally transformed."
Other associated equipment:
Yamaha AS2000 Amplifier
Tannoy Dimension 8 speakers
Transparent Musiclink Super Balanced interconnects (for SACD player)
Transparent Musicwave Plus speaker cables
Transparent Musiclink interconnects (for turntable)
Pro-Ject RPM 6 with Ortofon Rhondo Bronze Cartridge
Pro-Ject Speedbox MK2
.........Niall M. North Coast NSW, Australia
Just Listen To it
Features
The Terra Firma Clock
Custom Output Stage
Back-EMF Noise Reduction
Terra Firma Clock
XLR Fully Balanced Outputs
The “Terra Firm" Clock is not just another clock. A key design by our team from Vacuum State (www.vacuumstate.com) and
manufactured Down Under. Not just of the highest quality but also incorporates a unique power supply, with extraordinary low
frequency bandwidth that has rock like stability. Our finding that Low Frequency jitter is sonically more serious is not in itself
[email protected]
+64 7 838 8661
www.audioreference.co.nz
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unique, but that jitter down to sub-One Hertz is critical and usually noise in the power supply at ultra-low frequencies is far more
serious than previously thought. Only by actively seeking and finding a solution (because the problem is largely unmeasurable)
will it then become apparent by listening. LF noise performance in the Reference Clock easily surpasses even batteries.
Custom Zero Feedback Output Stage
Our new I/V Converter, no negative feedback, ultra-high non opamp circuit with full SuperReg power supply. Rifa Evox PPS
output capacitors - outperforms the usual expensive audiophile grade types. Cryoed silver clad wire and output RCA Socket
replaced with cryoed treated type.
Back-EMF Noise Reduction
Major reduction of back-EMF noise in digital circuits. Grossly overlooked and underestimated problem, often not fully
understood until the results are heard. Even the most expensive players on the market are inadequate, so much so that any
player can be improved by just tackling this problem alone. Using our methods the digital circuits are damped by shunting the
noise into the player's ground plane and out of harms way. The sonic gains and stunning increase in focus and fluidness are
immediately obvious.
This player is State-of-the-Art and should be compared to the best players in the world regardless of cost. By all means
compare it with any other players that would otherwise sell for tens of thousands of dollars.
Let your ear be your final arbiter. Happy listening.
Link
http://www.audioreference.co.nz/product/yamaha-cd-s1000-jlti-high-end-cdsacd-player-w-jlti-level-2-upgrade-conversion
[email protected]
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+64 7 838 8661
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