ASi Teknologies
"Ultra High Performance A/V Modifications & Products"
Budget Mod Descriptions

-Power Supply upgrades/rebuild
Replace FIVE stock diode rectifier bridges on transport and DAC/DSP boards with unique
ultra fast rectifiers, (removes grain and grit and improves speed), Replace an
abundance
of stock cheap electrolytic capacitors with ultra fast, ultra low impedance Rubycon caps
(more speed, better bass, better control, better resolution). Replace critical +5vdc 7805
voltage regulator for critical digital section with ultra low noise DEXA UWB regulator for
superior noise performance improvement over stock.

DEXA Neutrino 2 Reference Clock Upgrade (1 clock) for main DSP circuit-
The OEM Cambridge master clock is a basic pierce oscillator which feeds directly into the
ASIC (DSP) chip. Phase noise and power supply injected noise here is high affecting the
performance with "jitter". The DEXA clock has an extremely low phase noise oscillator
(around 1.5 picoseconds Jitter RMS) and dramatically improves all areas of playback with
this unit. The ultra-low jitter and noise performance of the D-Clock immediately releases
impressive sound quality from the Cambridge 840c & shifts the players tonality to remove
hardness & harshness; the overall frequency range is more natural and unforced. Lower
frequencies on playback have greater impact, weight and control. Greater dimension is
added to the music, vocals and instruments having improved spatial qualities with a more
solid, palpable feel. The Neutrino 2 clock has a very unique function of isolating the clock
signal ground to the power supply ground, so there is
no ground loop, and also there is no
Mains Noise injection
for the cleanest clock signal possible.
Premium Modification Descriptions

-Power Supply upgrades/rebuild
Replace FIVE stock diode rectifier bridges on transport and DAC/DSP boards with unique
ultra fast rectifiers, (removes grain and grit and improves speed), Replace an
abundance of
stock cheap electrolytic capacitors with ultra fast, ultra low impedance Rubycon caps (more
speed, better bass, better control, better resolution). Replace critical +5vdc 7805 voltage
regulator for critical digital section with ultra low noise DEXA UWB regulator for superior
noise performance improvement over stock.

DEXA Neutrino 2 Reference Clock for DSP and SERVO sections (2 clocks)-
The OEM Cambridge master clock is a basic pierce oscillator which feeds directly into the
ASIC (DSP) chip,
also their is a 2nd clock used for the digital servo circuitry as well, working
the digital circuitry to peel the information from the CD . Phase noise and power supply
injected noise here at both locations is high affecting the performance with "jitter". The
Neutrino 2 clock has an extremely low phase noise oscillator (under 1 picoseconds Jitter
RMS) and dramatically improves all areas of CD and DAC playback with this unit. The
ultra-low jitter and noise performance of the D-Clock immediately releases impressive sound
quality from the Cambridge 851c & shifts the players tonality to remove hardness &
harshness; the overall frequency range is more natural and unforced. Lower frequencies on
playback have greater impact, weight and control. Greater dimension is added to the music,
vocals and instruments having improved spatial qualities with a more solid, palpable feel.
The Neutrino 2 clock has a very unique function of isolating the clock signal ground to the
power supply ground, so there is
no ground loop, and also there is no Mains Noise injection
for the cleanest clock signal possible.

Analog Output Stage Rebuild w/Audio transformers & Part Replacements
This is the most critical of all the modifications that are performed in this machine. The stock
output stage is chalk full of signal resistors, transistors, etc.. We completely remove this
output stage and rebuild it with a optimal sounding output stage consisting of the the best
sounding opamps and best sounding audio signal coupling transformers that we know of.
This is the largest improvement that can be done in the entire unit.  The very high quality
transformers provide galvanic isolation in the signal path (which blocks HF noise being
generated by other component down the signal chain) and gives a means of providing a
ultra simple, no-capacitor-in-the-signal-path type output that is sure to stun and please you
to say the least. In this mod as well, we replace an abundance of voltage rail capacitors for
the DAC chip area to the ultra fast Rubycon capacitors, and all wiring is Silver Wire. Now this
player can outperform expensive flagship type units on the market for a fraction of the cost!
Now Music is so much quieter, cleaner, clearer, more vivid,more resolute with no lack of
dynamics! Much more music, emotion, and drive over stock.
Cambridge 851c Modification Descriptions & Prices
Budget Modification WAS $895, Sale Price $750  Installed/Shipped
"Premium" Mod WAS $1795, Sale Price $1395 Installed/Shipped
We Ship
World Wide!
Request More Information about our Cambridge mods and any special request!
Contact:

586-944-5611
asi_tek@yahoo.com
"...Beautiful....
Gorgeous Sound....
Thrilling Dynamics!"
Full Analog Output Stage Rebuild  & Twin Clocks seen in this pic
These modified players are State of the Art sounding! You would have to
spend a insane amount of money to get this performance from a stock unit!
Updated July 2018
~New Mods & updates
Looking for even more performance?? We also
have a new $1895 Statement Mod and a $2600 No
Limits Mod that uses 2 flagship Neutron Star 2
clocks and Statement audio transformers etc
Please
email to inquire or order.
~C37 Gold Standard Vibration Resonance Damping Lacquer
Application:
done to the transport tray, power and signal transformers, circuit trace,
and many mod parts to remove the internal ringing of the metal chassis which affects all
electronics parts, lasers, motors, etc Tone down specific vibrations & changing the
internal resonant frequency brings profound sonic improvements (increased resolution &
subliminal subtle details come through).
Voices have a large atmosphere around them with a very quick warm & smooth bloom.

~Most extensive EMI/RFI Shielding done in the industry: This is
critical! The 851c has multiple clocks inside of it and your other pieces of gear (cablebox,
computer, router, etc) internal clock resonators that spurn off spurious emissions. Local
RF transmitting towers (AM or FM) depending on where you live can also interfere.Careful
shielding of the chassis/lid, power supplies, clocks and wiring is a must for best
performance. No one else shields the oppo as much as we do (essentially creating a
pseudo faraday cage to block RFI from coming into the player), look at the pics down
below and you will see how work we put into each unit we modify! We apply
Audio Magic
Ultimate Black Out Paint
on all modification parts, PCB traces and wiring for maximum
RF shielding control and resonance control, there is nothing like this ultimate black out
paint in the industry, soaks up all the RF like a sponge!
Gold Standard
Audio Magic Ultimate
Black Out Paint!
~C37 Gold Standard Vibration Resonance Damping Lacquer
Application:
done to the transport tray, power and signal transformers, circuit trace,
and many mod parts to remove the internal ringing of the metal chassis which affects all
electronics parts, lasers, motors, etc Tone down specific vibrations & changing the
internal resonant frequency brings profound sonic improvements (increased resolution &
subliminal subtle details come through).
Voices have a large atmosphere around them with a very quick warm & smooth bloom.

~Most extensive EMI/RFI Shielding done in the industry: This is
critical! The 851c has multiple clocks inside of it and your other pieces of gear (cablebox,
computer, router, etc) internal clock resonators that spurn off spurious emissions. Local
RF transmitting towers (AM or FM) depending on where you live can also interfere.Careful
shielding of the chassis/lid, power supplies, clocks and wiring is a must for best
performance. No one else shields the oppo as much as we do (essentially creating a
pseudo faraday cage to block RFI from coming into the player), look at the pics down
below and you will see how work we put into each unit we modify! We apply
Audio Magic
Ultimate Black Out Paint
on all modification parts, PCB traces and wiring for maximum
RF shielding control and resonance control, there is nothing like this ultimate black out
paint in the industry, soaks up all the RF like a sponge!
Gold Standard
Audio Magic Ultimate
Black Out Paint!
Bybee Music Rails DC Power Supply Noise Filter Modules    
$200 for 1 (DSP), $350 for 2 (DSP/Clocking circuits), $550 for 4 (DSP/Clocking/analog
output voltages) or
$650 ON SALE if you do all  of them (5 total, 2 for clocking,1 for
DSP, 2 for digital). Bybee Music Rails are
patented DC power conditioning noise filter
circuits that are installed at the tail end of the modified DC power supply to the load of a
circuit.
Highly Recommend Upgrade, almost all orders get these because they make
such a huge improvement by reducing noise up to 45db directly to voltage rails & circuit
load! These are installed in-series at the end of the circuit load of the voltage rail feeding
the respective circuits and are not a snake oil gimmick. The sonic improvements are
transient performance (speed and accuracy), detail/resolution increase (considerably less
noise), dynamics/bass response will be lower and tighter and stronger, and spatial
resolution aspects dramatically improve as the sound stage is now larger, clearly
extending farther outside the speakers than before, and becoming deeper – and more
precise individual image locations within the stage.
 HIGHLY RECOMMENDED!
Tweaked Bybee Quantum Purifier Filters Combo $200   2 tweaked
slipstream Bybee filters are used on the AC inlet of the main power supply to purify the
power for the entire player.
GREAT RESULTS!
Ala Carte add-on optional upgrades for even better sound!
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We can do the same mods to the older Cambridge 840c!
"Since
1995"