Unique output design and independent control: 4.0 channel can be divided into two groups of 2.0 channel outputs, and the volume of each group can be adjusted separately. And specailly design a low frequency output to connect active subwoofer, very convenient to build 2.0/2.1/4.0/4.1 channel system.

　　Rated 45W × 4 output power: supporst speakers with 4-8 ohm impedance, easily to drive most home & car & boat speakers, can give your entertainment system a boost, with unrivaled sound superiority and lets you enjoy high quality amplified audio.

　　Multiple audio inputs: besides Bluetooth5.0/stereo RCA/3.5mm AUX inputs, which can be compatible with ipad, cellphone, MP3 player, CD player, dataplay, computer, decoder, etc. Also with USB(U-disk)/SD Card/MMC Card inputs, easily to enjoy high-quality los

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　　S299 4Channel Bluetooth Digital Amplifier for Home/Car Speaker Audio Power Amp

　　Item description

　　Features

　　Unique output design and independent control: 4.0 channel can be divided into two groups of 2.0 channel outputs, and the volume of each group can be adjusted separately. And specailly design a low frequency output to connect active subwoofer, very convenient to build 2.0/2.1/4.0/4.1 channel system.

　　Rated 45W × 4 output power: supporst speakers with 4-8 ohm impedance, easily to drive most home & car & boat speakers, can give your entertainment system a boost, with unrivaled sound superiority and lets you enjoy high quality amplified audio.

　　Multiple audio inputs: besides Bluetooth5.0/stereo RCA/3.5mm AUX inputs, which can be compatible with ipad, cellphone, MP3 player, CD player, dataplay, computer, decoder, etc. Also with USB(U-disk)/SD Card/MMC Card inputs, easily to enjoy high-quality lossless music at home or on the road.

　　Perfect design with powerful function: with volume knob, treble and bass control, easy to get more delicate sound. Designed LED display to clearly show the working status in real time, and euipped with remote control, much easier to use, very suitable for indoor and outdoor audio system use.

　　DC 12V-14V working voltage suits many places: beside used in home desktop audio system, it also can be used in your car, your boat, your RV, your golf cart—anywhere you need a great amplifier with low distortion and acoustically accurate reproduction of music.

　　Parameters

　　Audio input: Bluetooth / USB(U-disk) / stereo RCA / 3.5mm AUX / SD & MMC Card

　　Audio output: raw cable speaker jacks / low frequency output (connect active subwoofer)

　　Bluetooth version:5.0

　　Number of channel: 4.0 (also support 2.0/2.1/4.1)

　　U-disk/SD/MMC supported formats: MP3 / APE / FLAC / WMA /WAV

　　Max. capacity of U-disk/SD/MMC: 64G

　　Max output power: 45W×4

　　Speaker impedance: 4-8Ω

　　Frequency reponse: 20Hz-20KHz

　　Distortion: