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RU9 Product Information
| Item | Specification |
| Tube | KORG Nutube 6P1 |
| DAC Chip | AK4493SEQ × 2 |
| Charge Port | USB Type-C (QC3.0/PD2.0) |
| USB Processor | XMOS XU316 |
| Bluetooth Processor | QCC5125 |
| Battery | 2000mAh, 3.85V 7.7Wh Lithium Polymer Battery |
| Dimension | 100×70×15 (mm) |
| Weight | 150g (±5g) |
RU9 Battery and Duration
| Port/Mode | Duration |
| 3.5mm PO/LO Solid-state | 4.7 hrs |
| 3.5mm PO/LO Vacuum Tube | 3.5 hrs |
| 4.4mm PO/LO Solid-state | 4.3 hrs |
| 4.4mm PO/LO Vacuum Tube | 3.1 hrs |
| Charging Condition | QC3.0 / PD2.0 |
| Charging Time | 1.3 hr |
| Specification | Details |
| Output Power (32Ω) | 310mW+310mW (BAT), 420mW+420mW (DC) Solid-State Timbre: THD+N ≤0.5% Classic Tube Timbre: THD+N ≤3.1% Modern Tube Timbre: THD+N ≤1% |
| Output Power (16Ω) | 440mW+440mW (BAT), 610mW+610mW (DC) Solid-State Timbre: THD+N ≤0.5% Classic Tube Timbre: THD+N ≤3.1% Modern Tube Timbre: THD+N ≤1% |
| Frequency Response | Solid-State/Modern Tube: 20Hz–32kHz Classic Tube: 20Hz–22kHz |
| THD+N | Solid-State: ≤0.008% Classic Tube: ≤3.0% Modern Tube: ≤0.6% |
| Dynamic Range | Solid-State: ≥119dB Classic Tube: ≥105dB Modern Tube: ≥115dB |
| SNR | Solid-State: ≥118dB Classic Tube: ≥104dB Modern Tube: ≥114dB |
| Channel Separation | Solid-State: ≥76dB Classic Tube: ≥68dB Modern Tube: ≥76dB |
| Gain | H: 0dB / M: -6dB / L: -12dB (Selectable) |
| Output Impedance | 0.5Ω |
| Specification | Details |
| Output Power (32Ω) | 620mW+620mW (BAT), 1000mW+1000mW (DC) Solid-State: THD+N ≤0.5% Classic Tube: THD+N ≤3.1% Modern Tube: THD+N ≤1% |
| Output Power (16Ω) | 730mW+730mW (BAT), 1170mW+1170mW (DC) Solid-State: THD+N ≤0.5% Classic Tube: THD+N ≤3.1% Modern Tube: THD+N ≤1% |
| Frequency Response | Solid-State/Modern Tube: 20Hz–32kHz Classic Tube: 20Hz–22kHz |
| THD+N | Solid-State: ≤0.008% Classic Tube: ≤3.0% Modern Tube: ≤0.6% |
| Dynamic Range | Solid-State: ≥119dB Classic Tube: ≥105dB Modern Tube: ≥115dB |
| SNR | Solid-State: ≥118dB Classic Tube: ≥104dB Modern Tube: ≥114dB |
| Channel Separation | Solid-State: ≥96dB Classic Tube: ≥88dB Modern Tube: ≥96dB |
| Gain | H: 0dB / M: -6dB / L: -12dB (Selectable) |
| Output Impedance | 1.0Ω |
| Specification | Details |
| USB Audio In – Mode | UAC2.0/1.0 (Selectable) |
| USB Audio In – Windows | Windows 10 or later (Cayin USB Audio Driver may be required) |
| USB Audio In – MAC OSx | Driver-free |
| USB Audio In – Android | Driver-free |
| USB Audio In – iOS | Driver-free |
| USB Audio Format | PCM: 16–32Bit, 44.1kHz–768kHz (UAC2.0) DSD: Native DSD64–512, DoP64–256 (UAC2.0) |
| Bluetooth Codec Support | LDAC, aptX HD, aptX LL, aptX, AAC, SBC |
| Bluetooth Version | BT v5.1 |
| S/PDIF In – Audio Format | PCM: 16–24Bit, 44.1kHz–192kHz |
| S/PDIF In – Connector | 3.5mm Port (shared with S/PDIF In) |
| S/PDIF Out – Audio Format | PCM: 16–24Bit, 44.1kHz–192kHz |
| S/PDIF Out – Connector | 3.5mm Port (shared with S/PDIF Out) |
| Specification | Details |
| USB Audio In – Mode | UAC2.0/1.0 (Selectable) |
| USB Audio In – Windows | Windows 10 or later (Cayin USB Audio Driver may be required) |
| USB Audio In – MAC OSx | Driver-free |
| USB Audio In – Android | Driver-free |
| USB Audio In – iOS | Driver-free |
| USB Audio Format | PCM: 16–32Bit, 44.1kHz–768kHz (UAC2.0) DSD: Native DSD64–512, DoP64–256 (UAC2.0) |
| Bluetooth Codec Support | LDAC, aptX HD, aptX LL, aptX, AAC, SBC |
| Bluetooth Version | BT v5.1 |
| S/PDIF In – Audio Format | PCM: 16–24Bit, 44.1kHz–192kHz |
| S/PDIF In – Connector | 3.5mm Port (shared with S/PDIF In) |
| S/PDIF Out – Audio Format | PCM: 16–24Bit, 44.1kHz–192kHz |
| S/PDIF Out – Connector | 3.5mm Port (shared with S/PDIF Out) |
Both 3.5mm and 4.4mm PO/LO outputs support two switchable Tube Timbres and a Solid-state Timbre
Cayin RU9 is a perfect companion for your everyday carry. The DAC/AMP features dual headphone outputs, a 3.5mm single-ended and a 4.4mm balanced port. Users can connect their favourite IEMs and headphones with the RU9 with ease.
Triple Timbre
Gen5 3-stage Amplification Architecture
Cayin RU9 has a very innovative audio circuitry that features both solid-state as well as tube amplification. The device has three timbre options: Classic Tube, Modern Tube, and Solid-Stage. Classic tube brings the rich, dense, tubey flavour that we are all aware of. Modern Tube timbre packs a cleaner and more refined version with a bit of brightness up top, all this while maintaining a smooth tube flavour. Thirdly, Solid State is achieved using OPAMPs, this section delivers a neutral tone with faster transients and natural sound reproduction. Users can experience three types of unique sound flavours with the Cayin RU9.
For the fans of wireless connections, Cayin RU9 supports wireless Bluetooth V5.1 connectivity for signal input. It supports high-definition wireless Bluetooth protocols, including LDAC, AptX HD, AptX LL, SBC, AAC, etc. Enjoy your music in its purest form, even in wireless Bluetooth connectivity with the Cayin RU9.
Cayin RU9 has a powerful, fully balanced amp section. It features advanced Hyper mode with DC connectivity that provides a strong output thrust of 1000mW at a 32Ω impedance load. For DC mode, the RU9 mode selector has to be on DC mode, and a power adapter needs to be connected.
As a company our primary goal is to provide a seamless service that results in customer satisfaction. We aim to deliver within 3 working days. Unfortunately, there may be occasions where this time frame may not be met due to unforeseen circumstances; in this instance, we deliver product/s as soon as we can. All delivery charges are included within the prices quoted, unless otherwise specified.
All small items are usually delivered between 9am and 6pm, on a Monday to Friday, unless a Saturday delivery is requested. Follow My Parcel is an industry-changing innovation from DPD Local, which will give your customers unparalleled levels of information and peace of mind.Not only will your customers receive a one hour delivery timeslot, but they’ll now also be able to track the progress of their parcels on a map as our drivers make their way to the delivery addresses. Follow My Parcel will:
