best phono preamp

{"cid":"91222503","title":"Phono Box DC - MM\/MC Phono Preamp With Line Output Phono Turntable Preamp Mini Electronic Audio Stereo Phonograph Preamplifier","imgUrl":"https:\/\/img.chinax.com\/nimg\/66\/44\/d022bfc0f33c587fb48f226388c7-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"Vistron Audio, support OEM\/ODM","Model Number":"PH002","Minimum Order Quantity":"500 pcs","Delivery Time":"40-50 days","Certification":"CE, ROHS, FCC, UL, as your request","Place of Origin":"China","Payment Terms":"T\/T, L\/C, Western Union\uff0cPaypal","Supply Ability":"50000 pcs per month","Packaging Details":"1 piece phono pre amplifier in a box, then 6 pcs in a carton.","Item":"Phone pre amplifier","Type":"Moving Magnet (MM)","Gain at 1 kHz":"40 dB","Frequency":"10 Hz - 50 kHz (-3 dB)","Output impedance":"47 ohm","Usage":"Mini Preamp for Turntable","Audio amplifier input":"RCA","Dimensions (W x H x D)":"100 x 45 x 93 mm","Net weight":"292 G","Color":"Black,Silver"}}

{"cid":"91179284","title":"Custom Grand Amp ODS 50 Dumble Clone 212 V30 Cabinet Suede Blue 2 x 6L6GT JJ tubes Preamp 3 x 12AX7","imgUrl":"https:\/\/img.chinax.com\/nimg\/8d\/14\/2cc94977aa9731cb09d09e4d8596-200x200-1.jpg","attrs":{"Price":"1600-$1900\/pcs","Brand Name":"Grand","Model Number":"ODS50HC","Minimum Order Quantity":"1pcs","Delivery Time":"30 days","Certification":"CE, ROHS, FCC","Place of Origin":"China","Payment Terms":"Western Union, MoneyGram","Supply Ability":"20pcs\/month","Packaging Details":"Double strong box","Color":"SUEDE BLUE","Tubes":"JJ 6L6GC *2","Style":"Dumble TONE ODS50 Amplifier","Brand":"OEM, OBM, ODM"}}

{"cid":"91217181","title":"MS2830A Microwave Signal Spectrum Analyzer 9kHz-3.6GHz Pre Owned","imgUrl":"https:\/\/img.chinax.com\/nimg\/9b\/e4\/ab9cfc7ce5028cb37d57b64ba3c3-200x200-1.jpg","attrs":{"Price":"Negotiation","Brand Name":"Anritsu","Model Number":"MS2830A","Minimum Order Quantity":"1 set","Certification":"FCC","Place of Origin":"USA","Payment Terms":"T\/T","Supply Ability":"in stock","Packaging Details":"carton","Product name":"Signal Analyzer","Frequency":"9kHz-3.6GHz","Warranty":"one month","Usage":"spectroradiometer integrating sphere spectrum analyzer for led","Condition":"Pre-Owned","Functions":"Tested, in Full Working Conditions"}}