I have never bought an amplifier to power speakers, so please forgive me for my ignorance. I have always used powered speakers. I have two speakers that I'll be using as floor monitors for a live band. We just rehearse and play shows/outdoor events from time to time. We play pretty loud, even at practice. Can anyone here provide a suggestion on which Crown Amp to buy to power these two floor monitors? And lastly, is there a simple way to determine how much power I need from an amp to power any given speaker(s). I've read a few articles here and there, and there doesn't seem to be an easy explanation for the uneducated user:( Seems like there are a lot of variables and opinions out there. I'm buying a crown based on their reputation and market share... Each speaker has the following specs: Speaker Series Pro Audio Model Number PA310-8 List Price $85.99 Color Black Unit of Measure Each UPC 844632084232 Warranty - Parts 5 Years Warranty - Labor 5 Years Product Shipping Weight (lbs.) 16.4000 PRODUCT SPECIFICATIONS Speaker Type Woofer Nominal Diameter 12" Power Handling (RMS) 450 watts Power Handling (max) 900 watts Impedance 8 ohms Sensitivity 97.2 dB @ 1W/1m Frequency Response 44 - 4,000 Hz Voice Coil Diameter 76 mm Magnet Weight 80 oz. THIELE-SMALL PARAMETERS DC Resistance (Re) 5.7 ohms Voice Coil Inductance (Le) 1.53 mH Resonant Frequency (Fs) 44.4 Hz Mechanical Q (Qms) 8.63 Electromagnetic Q (Qes) 0.34 Total Q (Qts) 0.32 Diaphragm Mass Inc. Airload (Mms) 62.10 g Mechanical Compliance of Suspension (Cms) 0.21 mm/N Surface Area Of Cone (Sd) 530.9 cm2 Volume of Displacement (Vd) 265.5 cm3 BL Product (BL) 16.94 Tm Compliance Equivalent Volume (Vas) 81.9 liters Maximum Linear Excursion (Xmax) 5.0 mm MATERIALS OF CONSTRUCTION Cone / Diaphragm Material Carbon Fiber Impregnated Paper Cone Surround Material Rubber Voice Coil Wire Material Copper Voice Coil Former Black Polyimide Dual Voice Coil No Basket/Frame Material Stamped Steel Magnet Material Ceramic Ferrite Shielded No MOUNTING INFORMATION Overall Outside Diameter 310 mm Overall Depth 143 mm Baffle Cutout Diameter 283 mm # Mounting Holes 8 Thank you very much for anyone who takes the time to reply to this.