Cayin CP6 Hi-Fi CD Player

Portable CD Player With Real Tube Amplification — Cayin CP6

The Cayin CP6 is a portable CD player built for listeners who want vacuum-tube sound without giving up battery-powered convenience. At its core sit two Raytheon JAN 6418 NOS tubes feeding a fully discrete balanced headphone amplifier, paired with dual Cirrus Logic CS4308P DACs running in mono mode. This model also doubles as a USB DAC for a laptop or phone, rips CDs to lossless WAV, and drives demanding planar headphones from its 4.4 mm balanced output.

Triple-Timbre Tube Architecture and a Truly Discrete Amplifier

What separates this player from typical chip-based portables is the tube stage itself. Three selectable timbre modes — Classic, Modern, and Solid State — shape the output character, and unlike most tube-equipped players, the tube coloration carries through the headphone jacks, line outputs, and Bluetooth transmitter. The headphone amplifier uses discrete transistor push-pull stages rather than an integrated chip amp, with switchable Class A and Class AB operation, high/low gain, and selectable digital filters.

High-Resolution Dual-DAC Architecture

Digital conversion is handled by two Cirrus Logic CS4308P 32-bit, 8-channel DACs running permanently in mono mode for full-channel parallel differential current output. A 16-core XMOS XU316 USB audio processor manages asynchronous USB transmission with high-precision clock reconstruction to minimize jitter. The result is support for PCM up to 32-bit/384 kHz and native DSD 256 over USB, while an ESS ES9821Q chip dedicated to analog-to-digital conversion enables lossless WAV CD ripping at playback speed.

• DAC Chip: Cirrus Logic CS4308P ×2 in dual mono mode — two 32-bit, 8-channel converters running permanently in mono for full-channel parallel differential current output
• USB Interface: XMOS XU316, 16-core, asynchronous with high-precision clock reconstruction to minimize jitter
• Format Support: PCM up to 32-bit / 384 kHz, native DSD 256 over USB, plus lossless WAV CD ripping via a dedicated ESS ES9821Q ADC

Discrete Headphone Amplifier With Wide Impedance Range

The amplifier stage uses op-amp-based voltage amplification followed by a high-power discrete transistor push-pull output, with two Texas Instruments OPA1612 audio-grade op-amps dedicated to I/V conversion and low-pass filtering. On battery power the balanced 4.4 mm output delivers roughly 900 mW, climbing to 1300 mW + 1300 mW @ 16 ohms with external DC. The single-ended 3.5 mm output produces 330–420 mW, and the amplifier drives headphones from 8 ohms to 600 ohms.

• Tube Complement: 2 × Raytheon JAN 6418 NOS vacuum tubes in a dual-channel Class A common-cathode amplification stage
• Balanced Output Power: 1300 mW + 1300 mW @ 16 ohms on DC power, dropping to roughly 900 mW on internal battery
• Headphone Impedance Range: 8 ohms to 600 ohms — covers everything from sensitive IEMs to high-impedance dynamics and demanding planars

Bi-Directional Bluetooth, Multiple Outputs, and 7.5-Hour Battery Life

A Qualcomm QCC3083 chipset provides Bluetooth 5.4 in both directions, accepting LDAC, aptX Adaptive, aptX HD, aptX, and AAC on receive, and transmitting aptX Adaptive, aptX HD, aptX, and SBC to wireless headphones. Wired outputs include 3.5 mm and 4.4 mm headphone jacks, matching line outputs, plus a combined coaxial and optical S/PDIF output. The 7300 mAh battery delivers up to 7.5 hours with PD fast charging, while a dedicated USB-C power input enables stationary desktop use. The aluminum chassis measures 167 mm × 151 mm × 29 mm with a 2.3-inch front display.

• Bluetooth: 5.4, bi-directional via Qualcomm QCC3083 — receives LDAC, aptX Adaptive, aptX HD, aptX, AAC; transmits aptX Adaptive, aptX HD, aptX, SBC
• Wired Outputs: 3.5 mm and 4.4 mm headphone jacks, matching line outputs, coaxial + optical S/PDIF — tube coloration reaches every output, not just the headphone jack
• Battery and Build: 7300 mAh internal lithium battery, up to 7.5 hours playback, PD fast charging — aluminum chassis measures 167 mm × 151 mm × 29 mm with a 2.3-inch front display

For Audiophiles Who Want Tube Sound From a Portable Source

This player is the right choice for audiophiles who want genuine vacuum-tube coloration from a source they can carry to the office, take on a trip, or place on a desktop. CD collectors will appreciate the dedicated drive, lossless WAV ripping, and audiophile-grade ADC for archiving without a PC in the chain. Headphone enthusiasts driving power-hungry planars or high-impedance dynamics benefit from the discrete balanced amplifier and the wide 8-ohm to 600-ohm range, while listeners splitting time between portable and home use get a single unit whose tube stage reaches every output.

Cayin and Three Decades of Tube Audio Design

Cayin has been designing vacuum-tube audio equipment since 1993, building a reputation around integrated amplifiers, headphone amplifiers, and digital audio players that put genuine tube circuitry at the heart of the signal path. This model brings that heritage into a portable CD player format, combining the brand's tube-amplifier expertise with modern portable hi-fi engineering. For listeners who have followed Cayin's desktop and headphone amplifier line, this model represents the brand's most complete portable statement to date.