Thank you for visiting ASi! Your best source for audio circuit modification rebuilds & upgrades in
the entire world. We offer our own innovative creations (ie:ASi OTM) & audio system solutions
that are not found anywhere else in the high end audio industry. We only use select best
sounding & most technologically advanced parts on the market in our modifications to give you
the best sonic performance possible. If your looking for a modest budget upgrade to your Hi-Fi or
car audio gear to make it sound cleaner and more open, or if your looking for a no-holds-barred
top end "World Class Reference" audio modification rebuild that will blow the doors off of
anything, regardless of price, then your at your final destination. No Limits! We specialize in the
modification and circuit rebuild most components in your audio system including speakers. We
can also handcraft new speaker crossovers with top end parts & provide cryo treated silver wire
cabling to outfit your entire system. The modifications listed on this website is our most popular
purchased modifications. Please send any custom modification inquiries to our email or to the
form on the bottom of this page. There are plenty of pictures of our work on this site & we can
provide further pictures, email or phone references if necessary.
"Ultra High Performance Hi-Fi Audio Modifications & New Innovative Audio System Solutions"
#1 World Wide Source for Ultra High Performance Hi-Fi Audio Modifications & Rebuilds
~We will work on virtually everything! Need a custom mod done?
We have modified over 500+ different types and brands of CD/DVD/SACD players & Transports, DAC's,
Processors, Integrated/Amplifiers. We have also modified and tweaked out speakers from bookshelf to
large towers and can make you custom high end crossovers for a total sound transformation. We use
only the finest sounding parts that we have tested to ensure the highest performance possible!
World Wide Shipping
We offer the worlds most
rebuild for the $8,995 Cary
SLP-05 Preamp to elevate
your audio above everything
else on the market!
improvements over stock!
World Reference sound!
Our Modifications and
optional ASi "NO LIMITS"
DAC stage upgrade to
vastly improve your
We do repairs to both
stock and previously
Please contact us for
~Blackgate Capacitors Failure Announcement (Sept 2016 Update):
We have been receiving a good amount of equipment in for repair (modified by others) over the past 6
years that has become suddenly defective for the customer (output channels failing, no sound, power
supply failures, disc reading issues, etc). We have been discovering internally shorted out blackgate
capacitors installed previously that are prematurely failing or failing due to heat. Blackgate capacitors
have a 85 degree temperature rating celcius (which is 20 degree below normal high performance
marketed caps... ) and in tube gear or similar that generate heat in the local area could lessen the life
of locally installed blackgates. Heat is the biggest culprit of component failure. The
Rubycons/Panasonics replacements are all rated at 105 degrees Celcius and have much longer
longevity, have lower internal impedance and sound better for a longer timeperiod, cleaner and
clearer, better speed. Heat, humidity and moisture shorten shelf life. If youown any equipment modified
with blackgates, please keep this in mind.
If your interested in finding out more information, please email us here.
The ASi OTM (Off The
Mains) Battery Supply can
be retrofitted with any CD
Audio, DAC's, processors
to power the critical DSP,
DAC, Clocking, & Analog
output stages off the AC
mains for the best
performance. Step up to
the big leagues with low
impedance ASi OTM
If your not on OTM , your
not hearing everything!
ASi News & latest updates section April 2017:
~Now accepting custom modification requests
Please email what you have for custom modification pricing quotation or please send
information to the form below. We can supply MANY pictures of past projects.
~We can repair & mod update all defunct audio modifiers gear
If you have something that is modified and/or not working anymore we can fix & make
sound better as we know and understand all other forms of modification techniques,
approaches and can quickly troubleshoot your gear.
Please use this form for modification inquires, questions and orders
Updated April 2017
~Audio Magic SHD Beeswax Fuse Top of the Line fuses NOW
AVAILABLE. We have tested ALL the top fuses on the market and the
SHD is by far "The Best" sounding, most organic and natural fuses we
have ever heard. We sell them (tweaked) for $175. We are creating a
new webpage for these so please email until then.
~Audio Magic Black Out Paint applications- We are now
performing Audio Magic Black Out RFI/Resonance control applications
to ALL modified parts and parts in modded circuits. Please email for
more info until we create new webpage for this.
~Oppo Sonica DAC coming soon! New DAC from Oppo using
ESS9038PRO top end DAC chips. We will have a full blown
modification rebuild package plus options for this dac, plus Bybee
Music Rails and ASi OTM battery upgrades. Please email for more.
~Oppo UDP-203 Now Available! All mods now available, creating
webpage, in meantime, please email for mods/prices.
(After you hit "Submit", this page will refresh)
We specialize in battery powering oppo players!
Best sounding modified Oppo players in the world!
Updated JAN 2017
Coming Soon 2017! Brand New
Gustard A20H and X20pro
Brand New! Hottest DAC's on the market! DSD512! (via I2S interface)
We will be completely rebuilding the brand new $1699 Matrix X-Sabre Pro DSD1024 DAC with the worlds best
audio modifications possible. This DAC offers more input capability than any other dac on the market regardless of
price (with 16x DSD (DSD1024) input on I2s and DSD dop/dcs on coax/toslink/aesbeu/usb! It also uses the brand
new ESS9038PRO Flagship DAC chip, and has built in 18DB preamp. We will offer a Statement Level and a No
Limits Level for the person who wants to fully experience DSD1024 using mostly low impedance battery
power and ultra low noise regulation on all processing circuitry, extremely critical for best possible
sound!!! We will also be using a new DSD1024 interface circuit board with the Matrix pro to allow DSD1024
connection via USB to your VERY HIGH PERFORMANCE audio computer server. We will be producing a super high
end world reference class audio computer server and it's going to be called the new ASi NLR ("No Limits Ripping
Machine"), which will be designed to completely outperform ALL custom built computer servers that exist in the
market. If your looking for the BEST audio server possible for your very critical DSD1024 files, the best and only
solution will be the ASi NLR!
Coming in May!
New Matrix Audio X-Sabre Pro
PCM768/DSD1024 DAC Modifications!
Experience the superiority of DSD1024!
Oppo UDP-205 Flagship Universal player! Best mods in the world!
Please email to get on our list or to discuss building a new modified Oppo UDP-205 player this is
going to be released April 2017. The UDP-205 will be using the ESS9038PRO DAC chips, latest and
greatest. The mods/options for the UDP-205 will be very similar to our BDP-105(D) mods, except
there will be a new clock upgrade (ASi Signature Reference FemtoClock) and Audio Magic
SHD fuse and Black Out Paint upgrades among some other mod part upgrade refinements.....