Douk Audio M4 Mini 2/4 Channel Bluetooth 5.0 Digital Amplifier Stereo Audio Receiver Desktop Audio Amp USB Music Player 50W*4

<div class="detailmodule_html"><div class="detail-desc-decorate-richtext"><div style="font-family:&quot;Microsoft YaHei&quot;;font-size:medium;color:rgb(0, 0, 0)"><div> </div></div><div> </div><div class="detailmodule_dynamic"></div><div class="detailmodule_dynamic"><kse:widget data-widget-type="customText" id="1005000000194114" type="custom"></kse:widget></div><div style="font-family:&quot;Microsoft YaHei&quot;;font-size:medium;color:rgb(0, 0, 0)"><strong><span style="font-size:22px"><span style="font-family:&quot;times new roman&quot;, times, serif">Features</span></span></strong></div><div style="font-family:&quot;Microsoft YaHei&quot;;font-size:medium;color:rgb(0, 0, 0)"><div id="pastingspan1" style="font-family:&quot;Times New Roman&quot;;font-size:14pt"><ul><li><p><span style="font-size:22px"><span style="font-family:&quot;times new roman&quot;, times, serif">One group of stereo RCA (CH3 and CH4) can be used as audio input or output by switching the selector, to acheive different demands:</span></span></p></li></ul></div></div><blockquote style="font-family:&quot;Microsoft YaHei&quot;;font-size:medium;color:rgb(94, 53, 177);margin:0px 0px 0px 40px;margin-bottom:0px;margin-top:0px;margin-left:40px;margin-right:0px;padding:0px 0px 0px 0em;padding-bottom:0px;padding-top:0px;padding-right:0px"><div id="pastingspan1" style="font-family:&quot;Times New Roman&quot;;font-size:14pt"><span style="font-size:22px"><span style="font-family:&quot;times new roman&quot;, times, serif">CH3/CH4 as audio output: 4 groups of speaker sockets can connect to 2 pair of speakers.

Besides connect to active speakers, CH3/CH4 also can connect to another M4 amplifier to connect more speakers, in this way multiple amplifiers and multiple speakers can be connected in turn, to achieve one audio signal be shared in several rooms.</span></span></div><div><span style="font-size:22px"><span style="font-family:&quot;times new roman&quot;, times, serif">CH3/CH4 as audio input: one input corresponds to one output (ex.

CH1 speaker socket will output the audio signal that CH1 inputs), which means that two groups of stereo audio signal (or 4 groups of mono audio signal) can be input at the same time.</span></span></div></blockquote><div style="font-family:&quot;Microsoft YaHei&quot;;font-size:medium;color:rgb(0, 0, 0)"><div id="pastingspan1" style="font-family:&quot;Times New Roman&quot;;font-size:14pt"><ul><li><p><span style="font-size:22px"><span style="font-family:&quot;times new roman&quot;, times, serif">Supporting wired 2 groups of stereo RCA and wireless Bluetooth 5.0 input, compatible with most common audio device such as phones, computers, TVs, MP3, TV, CD players etc.

With U-disk input, it can be used as a digital music player, supporting MP3, WAV, APE, FLAC and WMA lossless formats.</span></span></p></li><li><p><span style="font-size:22px"><span style="font-family:&quot;times new roman&quot;, times, serif">With 4 groups of speaker sockets output, they can output at the same time and each channel with independent volume control.

Its max output power can reach 50W×4, and equipped with high-quality 24V/4.5A power supply, enough to drive most home speakers.</span></span></p></li><li><p><span style="font-size:22px"><span style="font-family:&quot;times new roman&quot;, times, serif">Reasonable circuit layout, concise wiring and high-quality components to ensure HiFi clear sound and long time stable work.

Separate design of small and large signal circuit for better circuit protection. </span></span><span style="font-size:22px"><span style="font-family:&quot;times new roman&quot;, times, serif"><span style="font-size:14pt">Bluetooth 5.0 version with high-gain antenna, ensure more stable and faster transmission.</span></span></span></p></li><li><p><span style="font-size:22px"><span style="font-family:&quot;times new roman&quot;, times, serif">Propersize with exquisite appearance, aluminum alloy case is CNC machined and with anodizing process, more fashionable and durable, very suitable for home, office and desktop audio system use.</span></span></p></li></ul></div></div><div style="font-family:&quot;Microsoft YaHei&quot;;font-size:medium;color:rgb(0, 0, 0)"><span style="font-size:22px"><span style="font-family:&quot;times new roman&quot;, times, serif"><span style="color:rgb(0, 0, 255)">Notice: U-disk input is prior to Bluetooth input, so please make sure U-disk has been pulled out if you want Bluetooth input.</span></span></span></div><div style="font-family:&quot;Microsoft YaHei&quot;;font-size:medium;color:rgb(0, 0, 0)"><hr/><div style="font-family:Poppins;font-size:13px"><strong><span style="font-size:22px"><span style="font-family:&quot;times new roman&quot;, times, serif">Parameters</span></span></strong></div><div id="pastingspan1" style="font-family:&quot;Times New Roman&quot;;font-size:14pt"><ul><li><p><span style="font-size:22px"><span style="font-family:&quot;times new roman&quot;, times, serif">Model: Douk Audio M4</span></span></p></li><li><p><span style="font-size:22px"><span style="font-family:&quot;times new roman&quot;, times, serif">Channel: 2.0 / 4.0</span></span></p></li><li><p><span style="font-size:22px"><span style="font-family:&quot;times new roman&quot;, times, serif">Audio input: Bluetooth/Stereo RCA/U-disk</span></span></p></li><li><p><span style="font-size:22px"><span style="font-family:&quot;times new roman&quot;, times, serif">Audio output: speaker sockets</span></span></p></li><li><p><span style="font-size:22px"><span style="font-family:&quot;times new roman&quot;, times, serif">U-disk support format: MP3, WMA, APE, FLAC, WAV...</span></span></p></li><li><p><span style="font-size:22px"><span style="font-family:&quot;times new roman&quot;, times, serif">U-disk capacity: max 32G</span></span></p></li><li><p><span style="font-size:22px"><span style="font-family:&quot;times new roman&quot;, times, serif">Bluetooth version: 5.0</span></span></p></li><li><p><span style="font-size:22px"><span style="font-family:&quot;times new roman&quot;, times, serif">Speaker impedance: 4-8Ω</span></span></p></li><li><p><span style="font-size:22px"><span style="font-family:&quot;times new roman&quot;, times, serif">Max output power: 50W*4 (4Ω load)</span></span></p></li><li><p><span style="font-size:22px"><span style="font-family:&quot;times new roman&quot;, times, serif">SNR: ≥98dB</span></span></p></li><li><p><span style="font-size:22px"><span style="font-family:&quot;times new roman&quot;, times, serif">Input sensitivity: 0.775V</span></span></p></li><li><p><span style="font-size:22px"><span style="font-family:&quot;times new roman&quot;, times, serif">THD: 0.05%(1kHz 1W)</span></span></p></li><li><p><span style="font-size:22px"><span style="font-family:&quot;times new roman&quot;, times, serif">Frequency Response: 20Hz-20KHz(±3dB)</span></span></p></li><li><p><span style="font-size:22px"><span style="font-family:&quot;times new roman&quot;, times, serif">Working voltage: DC 12-24V</span></span></p></li><li><p><span style="font-size:22px"><span style="font-family:&quot;times new roman&quot;, times, serif">Color: Black</span></span></p></li><li><p><span style="font-size:22px"><span style="font-family:&quot;times new roman&quot;, times, serif">Dimensions(W*D*H): 128*134*33mm / 5.04*5.28*1.30in</span></span> <br/><span style="font-size:24px">Net weight: 533g / 1.18lb</span></p></li><li><p><span style="font-size:24px">Package weight(with 24V4.5A power supply): 1100g / 2.43lb</span></p></li><li><p><br/></p></li></ul><hr/><div><strong><span style="font-size:22px"><span style="font-family:&quot;times new roman&quot;, times, serif">Packing List</span></span></strong></div><div><ul><li><p><span style="font-size:22px"><span style="font-family:&quot;times new roman&quot;, times, serif">1*M4 Amplifier</span></span></p></li><li><p><span style="font-size:22px"><span style="font-family:&quot;times new roman&quot;, times, serif">1*24V/4.5A Power Supply(optional)</span></span></p></li><li><p><span style="font-size:22px"><span style="font-family:&quot;times new roman&quot;, times, serif">1 Set*Raw Cable Speaker Jacks</span></span></p></li><li><p><span style="font-size:22px"><span style="font-family:&quot;times new roman&quot;, times, serif">1*Manual</span></span></p></li></ul></div></div></div><div><br/></div><p 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