Quality High Performance Yamaha IC Chip In order to create high quality sound and not to compromise in sound quality, YAMAHA YDA138 chip and a completely new PCB design is built into this amplifier for pure audio enjoyment External or Internal Usage Built into your PC case to create a high quality sound or use it as an external amplifier for you home theater system. Overall Dimensions: 5.98x1.61x4.45 in Weight: 15.49oz/480g Input: RCA Input x 2 Channels Class AB Headphone Amp: Maximum Output 50mWx2 Channels; S/N Ratio 95dB Compatible Speaker Spec: 4Ω-8Ω Speaker (Exceptions may apply for extra large speakers or speakers with high load onto an amplifier) Power IC: Yamaha YDA 138 (D-3) Continuous Maximum Output: 10W x2 Channels Maximum Efficiency: 88% S/N Ratio: 103dB Total Harmonic Distortion Rate: 0.02% (1KHz) Availability: Usually ships the same business day. SCYKAMAKRO$43.50 Please e-mail or call for a price on any item not listed here. Most items that are not in stock are normally available for pickup/shipping within one business day.