Douk Audio K5 USB DAC & Headphone Amp: Featuring USB and SPDIF optical inputs, as well as optical, RCA and 6.35/3.5mm jack outputs, the K5 serves as a high-performance headphone amplifier, a USB DAC, a preamp, but also a USB to optical converter to transmit the high-quality audio from the computer to those audio devices only with SPDIF digital input such as CD players, amplifiers and active speakers etc. High-end Chipset and Top-level Parameters: The K5 adopts ESS9038Q2M (DAC), SA9312 (DSP), OPA1678 (LPF) and SGM8262 (amp) op-amps, and supports PCM 32bit/384kHz high-resolution decoding and DSD256 playback. Its excellent circuit design ensures superior performance with a SNR over 121dB, a low noise floor of only 3μV and an incredibly low THD of 0.0007%, K5 delivers an exceptional listening.
eBay
Mini HIFI digital bluetooth audio power amplifier. Amplifier type: HIFI amplifier. -TF Card, AUX, U disk, MP3 format play, support bluetooth wireless connection. Bluetooth: Support. 1 Power Amplifier.
eBay
With 5 kinds of analog and digital audio input (Bluetooth 5.0 / USB / Coaxial / Optical / 2 groups of RCA), compatible with almost all audio devices such as MP3, phone, tablet, computer, CD players etc. to meet different needs of home audio systems. U-disk input supports lossless formats such as APE, FLAC, WAV etc., easy to enjoy HiFi music. Besides speaker output (4/6/8Ω), a low frequency output is specially designed to connect active subwoofer to build 2.1 channel audio systems, which can strengthen bass sound effects to bring more shocking experience just like in the cinema. With treble and bass control to bring more delicate sound according to your own listening style. Integrated design of vacuum tubes and transistors, using 6U1/6A2/ECH81 tube for pre-amplificatoin, WY2P tube for recti.
eBay
Potting output transformer to ensure the stability and reliability of the output. The output transformer is made of new 0.35 iron core, high-purity pure copper enameled wire, layered segmentation, and serial connection method.
eBay
With standard stereo RCA audio input, perfectly compatible with many audio devices such as phone,TV, MP3 players, CD players, DAC, computers etc.. With built-in preamplification circuit, can match well with audio source that with low signal output. Adopting classical TPA3116 IC chip in each channel, class D amplification, the max output power can reach 100W+100W(4Ω load), easily to drive all home bookshelf/ computer/ desktop/floor-standing/outdoor passive speakers. Reasonable circuit, concise wiring layout and perfect protection, no sparks no shock. With ultra-low distortion and dynamic balance, the sound is very smooth and natural, powerful in low frequency and delicate in high frequency. The speaker terminals use a staggered design, which provides more space and makes connection easier.
eBay
G4 can be used as full frequency amp or subwoofer amp with the B/M switch to connect different speakers, and with 3.5mm AUX and RCA input to compatible with different audio devices. 2PCS G4 can be used to drive left and right channel independently to avoid mutual interference.
eBay
Highly rated Denon M31 System, produces a quality sound. With the Bluetooth Adaptor for iPod, iPhone, Android Samsung Phone and any other Bluetooth enabled device, you can also stream music directly from your PC / Laptop / Tablet via Bluetooth.
eBay
NS-10G Bluetooth 5.0 Mini HiFi Stereo Audio Amplifier – 100W Output (50W x 2). Powerful HiFi Output Output Power: 50W x 2 (RMS). Supported Inputs: Bluetooth 5.0, USB, AUX. Bass Boost Key Features.
eBay