Product Name: Professional PA Public Address Mixing Power PRO Audio Speaker Amplifier for PA Sound System Ok820 Ok830 Model NO.: OK820 OK830 Conductive Mode: D Element Number: Push-Pull Amplifier Voltage: AC 220V Output Number: 4 Sound Channel: 2.1 Function: Pre-amplifier Tube Type: Transistor Amplifier Used For: Professional Usage: Hi-Fi, AV, KTV System, Public Address System& Stage Type: Professional Amplifier Trademark: P@A Transport Package: Carton Box or Flight Case Origin: Guangzhou Product Description 1.Specification:Item No.OK820OK830Frequency Response(MUSIC MIC)20Hz~20KHzInput Sensitivity(MIC)11MV (MUSIC) 210MVCenter Tone(±10dB)100Hz 2.5K 10KHzMIC Tone(±10dB)57Hz 134Hz 400Hz 1KHz 2.5KHz 6.3KHz 10KHzMUSIC Tone(±10dB)350W(AES) 1400W(PEAK)MIC LCUT(±10dB)30Hz 50Hz 80Hz 100HzSignal-to-Noise Ratio:≥95dBDimension(H×W×D)96×483×420mm 3.78in×19.02in×16.54in)96×483×420mm 3.78in×19.02in×16.54in)Net Weight10.9kg(24.05 lbs)11.9kg(26.3 lbs)2.Our advantage:1)Our prodect have passed ISO9001,SGS,CE, CCC, ROHS and so on.2)We are a factory with strong technology and good after sales.3)We can design the amplifier and speaker by our clients.3.Our Application4.FAQ:Q1: How long is the warranty for the speakers?A1: 3year warranty.Q2: How about the delivery time?A2: 3-7days for stock. 10-20 days for new order depend on order quantity since receipt of 30% T/T depositQ3: Can you produce according to customers' design?A3: Yes we can, we are professional manufacturer,OEM &ODM are welcome .Q4:Areyouafactoryortradingcompany?A4:Weareamanufacturer(withourownfactory) . Wearea leading manufacturer, exporter and supply chain service provider on professional audio system.Q5:Whereisyourfactorylocated?HowcanIvisitthere?A5: Ourfactoryislocatedin BAIYUN District,GuangzhouCity,GuangdongProvince,China. about 30minsbycarfrom Guangzhou Baiyun Airport,Q6:CanyoudoOEMandODM?A6:Yes,both.We can put your idea into products. We have professional research development team, develop the products according to customer required.5.Our Company: