CI Audio C•100S

 1,250.00 Excl. VAT

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SKU: ci-c100s-silver Category:


C•100S Stereo Power Amplifier

Reference quality power in a compact package.


  • Flat frequency response and phase into any conventional speaker load
  • Low distortion which is flat vs frequency
  • Ultra low output impedance for excellent control of the loudspeaker
  • High efficiency, which results in lower power consumption, low operating temperature, and high reliability
  • Compact & light weight package

Power Management

Power is fed by a 400 watt low-noise switching audio power supply, housed in a heavy steel Faraday shield. This complex supply outputs both high voltages/high current to the amplifier output stage and also low voltages for the input stage.

Audio Circuit

Amplifier layout is simple and logical with power supply circuitry at the front of the chassis. This allows very short signal paths with our custom input stage board. Signal enters PCB mounted RCA jacks (no wires), through the JFET input stage, into the UCD amplifier module. The entire signal path from input jack to speaker terminals is about 6”.

Amplifier outputs are conveniently located on the rear panel. Speaker connections can be made in a variety of ways via the insulated 5-way binding posts.

The compact machined aluminum chassis provides heat dissipation for the direct-mounted power supply and audio output circuits. Due to the high efficiency of the circuits, the chassis will only be warm to the touch under normal conditions.


The C series amplifiers are equipped with a variety of fault protections including DC, over-voltage, and short-circuit. AC Mains Fuse protection is also provided and easily accessible at the power inlet.

5 year Warranty

Enjoy peace of mind with our comprehensive 5 year warranty. Full service information is included in the product manual.


Power Output: 180 watts per channel @ 4 ohms (both channels driven), 100 watts per channel @ 8 ohms (both channels driven)
THD + Noise @ 1kHz: <.006% (1 watt/1kHz)
IMD: <0.005%
Input Impedance: 100k ohms (Teflon insulated RCA jacks)
Output Impedance: .015 ohms (5-way binding posts)
Voltage Gain: 26dB/32dB (user-selectable via external DIP switches)
Input Sensitivity: 1.4V/26dB, 0.7V/32dB
Maximum output current: 14A (per channel)
Power consumption: <15w (idle)/90% efficient @ rated power
Dimensions: 216.0 mm W x 70.0 mm H x 254.0 mm D(including binding posts, etc.)
Weight: 2.7 kg (4.1 kg shipping weight)
Handcrafted in USA



The Absolute Sound, Sept 2019 – “if you want an amplifier that has “personality” you should look elsewhere. But if you need a harmonically neutral power amplifier that you can attach to a wide variety of speakers, the C•100S would be an excellent choice. And priced at $1500, the C•100S ranks as a “best buy” in my world”. by Steven Stone –

Manufacturer: Channel Island Audio –

Product website•100s-2-channel-stereo-amplifier





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