ASi
Teknologies
"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 Clock 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 DEXA 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.

The DEXA D-Clock now eliminates the need for a dedicated (and costly)
external dedicated power supplies due to its inherent mains/ground isolation
topologies.
 
With these unique topologies we can achieve the best performance without
spending many more dollars on redundant parts...
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 D-Clock 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 DEXA
clock has an extremely low phase noise oscillator (around 1.5 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 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 DEXA
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.

The DEXA D-Clock now eliminates the need for a dedicated (and costly)
external dedicated power supplies due to its inherent mains/ground isolation
topologies.
 
With these unique topologies we can achieve the best performance without
spending many more dollars on redundant parts...

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 $725  
Installed/Shipped
Send your player in for mods, 7-10 day turnaround
"Premium" Mod WAS $1795, Sale Price $1395 Installed/Shipped
Send your player in for mods 2 week turnaround
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 D-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!