rack mountable amplifier for audio output

{"cid":"91220993","title":"4-Channel Rack-Mountable Amplifier With Advanced Cooling System And Comprehensive Protection Circuitry For Audio Output","imgUrl":"https:\/\/img.chinax.com\/nimg\/59\/ff\/88c67a4a9ef6d2572f93e3e6ffec-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"P-AMF","Model Number":"TA4004","Minimum Order Quantity":"30PCS","Delivery Time":"30-60days After Deposit","Certification":"CE,ISO","Place of Origin":"china","Packaging Details":"483W*396D*88H (mm)","Rated Power 4\u03a9 Stereo power":"300 watts x4","Resolution":">65dB","FREQUENCY RESPONSE (@1\/4W INT08ohms,+0.5\/-0.5dB):nce":"20Hz -20KHz","Brand customization":"OEM\/ODM","Color":"Black","Packing Details":"Cartons and Plastic Bags","INPUT IMPEDANCE(NOMINAL):":"20kQ balanced,10kQ unbalanced"}}

{"cid":"91224235","title":"4\u00d7350w 4-channel Class D Amplifier Mixer Amplifier OEM ODM Logo Customization Chinese Factory Direct Sale","imgUrl":"https:\/\/img.chinax.com\/nimg\/88\/48\/ade7bef73c2d86464e49e625a817-200x200-1.jpg","attrs":{"Model Number":"MC-4350","Minimum Order Quantity":"100","Delivery Time":"30","Certification":"CE","Channel":"4-channel","Place of Origin":"China","Feature":"Good sound quality ,no rusty","Material":"Metal","Supply Ability":"4000+","Service":"OEM ODM","Power":"350"}}