Feedback and fine-tuning circuits - your personal sound journey

Have you ever wondered how different sound characteristics are created? Cayin engineers have developed two special sound tuning circuits for the C9ii:

Modern sound: High negative feedback significantly reduces total harmonic distortion (THD) and creates a clear, clean tube sound with minimal thermal noise.

Classic sound: No negative feedback is used; each stage operates independently through local feedback. The result: a sound quality that is not only heard, but felt! The harmonic distortions of the tube amplification give the music a gentle, musical soul that makes the listening experience an unforgettable pleasure.

Innovative mesh part design: Efficiency on a new level!

How important is optimum performance to you? The power supply design of the C9 series is the key to an unparalleled sound experience. Our discrete headphone power amplifier circuits, the C9 and C9ii, are powered by powerful 3,400mAh batteries. Why is this important? Because it allows us to bypass the DC/DC voltage gain conversion, creating the ideal power supply environment for analog circuits. With careful filtering and decoupling using high-quality components such as WIMA metal film capacitors and Panasonic POSCAP polymer tantalum capacitors, we guarantee not only the highest sound quality, but also extended battery life. Ideal for all music lovers who don't want to miss out on first-class sound on the go!

High-quality housing construction: style meets functionality!

What makes a headphone amplifier truly exceptional? The Cayin C9ii impresses not only with its robust and elegant housing design, but also with its superior heat dissipation. The transistors in our four-channel discrete high performance amplification are the main source of heat - but don't worry! Thanks to innovative graphene heat conducting plates and aluminum alloy heat sinks, this heat is efficiently dissipated and ensures an even temperature distribution. So you can be sure: Even with intensive use, performance remains constant and reliable.

With the Cayin C9ii, we are setting new standards in sound quality, design and functionality. Experience state-of-the-art technology paired with audiophile details in a compact, portable format. Are you ready for the ultimate listening experience? Immerse yourself in a world full of energy and vibrancy - your ears will thank you!

Audio circuitry with the groundbreaking 5th generation Nutube 6P1

Imagine experiencing music in a new dimension with the C9ii, equipped with the revolutionary fifth generation Nutube 6P1 vacuum tube. Cayin has integrated this innovative technology into many of its products, from the N8 to the C9 to the N30LE and now also in the C9ii. But what makes this vacuum tube so special? In a compact and energy-efficient format, it brings out the warmth and musicality of classic tube amplifiers, adding a fascinating sonic texture to every note. Experience how the natural character of the music comes to life and the emotional depth of every recording is preserved.

Switchable anode voltage - your personal sound style

Have you ever thought about how much influence the anode voltage has on the sound? After years of intensive research and technical refinement, Cayin has enriched the C9ii with a selectable anode (plate) voltage function. This function offers you the choice between two levels: high and low. Do you want a softer, warmer sound reproduction? Then choose the low setting! Or do you prefer a more dynamic, detailed performance? Then the high voltage is just right for you! This flexibility will not only delight audiophiles, but also any music lover who wants to control their high-quality headphones optimally to bring out the subtleties of every recording.

Fully balanced headphone amplifier - sound in perfection

But that's not all. The Cayin C9ii features a fully balanced amplifier design. This modern circuit architecture ensures unparalleled fidelity and efficient performance. Distortion is minimized, the dynamic range is extended and channel separation is increased. The balanced circuitry reduces crosstalk between the channels, resulting in a clear soundstage and precise stereo imaging. The C9ii offers you a detailed and nuanced music reproduction that will captivate even the most demanding audiophiles. What's more, an integrated precision control circuit allows the headphone amplifier to operate in different modes - from NFB/LFB to Class A/Class AB to Hyper, single-ended and balanced. What sound variations would you like to experience today?