CH Precision I1 Universal Integrated Amplifier

The I1 is supplied in standard form equipped with four 
digital inputs (CH-Link HD, AES/EBU, S/PDIF and TopLink - 
although a second identical digital input board can be added 
in the spare chassis slot if you need the extra connections) 
one set of balanced and two pairs of single-ended analog 
inputs. The factory fitted Ethernet Control Board, which 
allows the unit to be remotely accessed, configured and 
controlled via the CH-Control Android App, can be replaced 
with a full network streaming capable Ethernet input and 
a separate, asynchronous USB input card can be added 
to enable connection of computer sources for file replay. 
The discrete, fully complementary analog input boards 
can be fitted with additional internal circuit blocks that 
allow owners to convert either or both of the RCA analog 
inputs into current-sensing MC phono-inputs, complete 
with switchable replay EQ settings for RIAA, eRIAA, Decca, 
Columbia, EMI and Teldec (DGG) curves. Finally, a Clock Sync board allows you to slave the I1 to external master 
clocks, or designate its internal clock as the system master. 
Dominating the interior of the I1 chassis, you’ll find a 
massive 1000VA transformer that’s more than capable of 
supporting the 100 watt/channel into 8 Ohms rated output; 
in combination with the 100,000uF of reservoir capacitance 
it allows the output stage to handle awkward loudspeaker 
loads with ease. 
How did we pack so much functionality into a single chassis? 
By leveraging the power of sophisticated software control, 
modular construction and advanced digital processing. 
The I1’s volume control is a remarkable hybrid design, 
that uses an R-2R resistor ladder in the analog domain for 
setting coarse levels, with fine adjustment taking place in 
the digital domain, a combination that allows incredibly 
precise level control without eroding bit depth, resolution or 
dynamic range. Likewise, the I1’s advanced analog-to-digital 
conversion stage allows us to set overall cartridge gain 
and replay EQ in the digital domain, providing unparalleled 
phono replay flexibility, accuracy and features in an 
integrated unit. You mean we turn the analog inputs into 
digital? Yes – but if you don’t tell your friends they’ll never 
know. Indeed, many listeners swear that the I1’s phono stage delivers some of the finest analog sound they’ve ever 
enjoyed!