The Cayin C9 is a portable headphone amplifier with 4 channels reaching 4100mW at 16 Ω or 2600mW at 32 Ω per channel.
Its circuitry is designed around a KORG Nutube solid-state tube structure based on two amplification modes Pure Class A and Class AB.
With 3.5mm SE and 4.4mm balanced output, the C9 squeezes out all the power your headphones are capable of.
The bell circuit has been redesigned with two Triode Direct Nutube 6p1 tubes with dual miniature headers.
This helps to ensure that its amplifier circuit is designed around two matched pairs of low-noise, high-quality Toshiba 2sK209 JFET low-noise audio frequency pairs.
All this results in a warm, rich timbre with realism and appeal.
Gain adjustment is another of the Cayin C9's strengths.
You will be able to adjust it according to the needs of your headphones, and achieve the definition and power you need.
Its 4-channel ALPS potentiometer facilitates low distortion and noise levels.
The Cayin C9 also integrates a line input and a PRE-amp input.
Through the line input the amplifier receives a fixed voltage audio signal from the line level output and functions as a headphone amplifier with local volume control.
At the PRE-amp output a variable voltage audio signal is received from the preamplifier output and functions as a power amplifier, the volume is controlled at the source equipment.
As for the rest of the connections, this C9 has a limitless interface with SE and balanced 4.4mm inputs and outputs for you to combine all the headphones in your collection.
The fully balanced headphone amplifier circuit based on high-quality 4-channel JFET and BJT for portable applications.
To achieve the desired audio performance, the input signal is driven by a quad set of WIMA coupling capacitors and two combined pairs of LSK489 DUAL JFET differential amplifier.
The final output stage is composed of a combined quad set of BJTs doubled in parallel, providing high power for EMI and headphones.
The C9 is designed to interconnect components that generate heat. Its careful management has been designed to effectively divert and dissipate thermal energy to the location of the components.
Maximizes heat transfer efficiency and maintains C9 at consistently low temperatures.
The amplifier battery is made of low internal resistance lithium. Four batteries arranged in series provide a direct power supply with low resistance and fast response power to the circuit.
Its dedicated management system ensures that all batteries are fully charged at the same rate.
The QC3.0 fast charging mode guaranteed via USB-C facilitates the process and combines with its LED indicator to show the charging status and battery capacity.
