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RU7 uses a specialized micro-miniaturized 1-Bit DAC with the power of a standard 4 channel DAC architecture. The array of 128 high precision Thin Film Resistors closely resembles the discrete DAC used in the Cayin N7 DAP.
Dual amplifiers in parallel provide high output balanced power. The two amplifiers operate in parallel to provide 160mW @ 32 ohms in single-ended output and 400mW @ 32 ohms for the balanced output.
The 1-Bit DAC design is very demanding of the input signal, and we recommend that you provide the maximum possible digital output volume from your mobile device to get the best signal from RU7. Cayin's specially developed low noise, low power consumption 100 step volume control offers precise control over a wide volume range to power a range of sensitive and harder to drive IEMs and headphones.
RU7 uses a similar design to its predecessor, RU6, with two 6 layer PCB boards, separating digital and analog functions of the device. The two layers safeguard signal integrity and keep noise from the reference clock and DSP from bleeding into the amplification circuit.
Discrete resistor network DACs have low power consumption compared to other integrated DAC designs, and minimize power drain from the mobile source. Combine the DAC design with a carefully designed amplification circuit and RU7 manages a low 100mA power drain. This enables compatibility with:
Android based devices
RU7 includes a supple handmade leather case custom made to fit the device. Included with the case are two discreet magnets with adhesive that you can use to attach RU7 securely to your car, phone, or anywhere else that you use it regularly.
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