Allen Bradley AB Carbon Composition Resistor Rating : 1/2 W 0.5W Used Tolerance : 10-20% Dimension : 3.6 x 9.7mm Value : 680R 680 Ohms .68K
AB resistor is a widely used amplifier manufacturers and DIY enthusiasts resistor. Medium and low frequency is abundant and music is also rich in performance. The overall sound behaved quite natural and easy-going.