Add to Cart Quick view RL Drake L4-B Amplifier All in One, Soft-Start, Soft-Key, & Bias Module Kit Drake MSRP: Now: $89.99 Was: Product Description The ES4L4-B is a combination soft-start/soft-key/bias board for the L4-B amplifier. This all-in-one board limits inrush current during amplifier start-up by placing a small resistive load in series with the AC... MSRP: Now: $89.99 Was: Add to Cart Quick view Qty in Cart: 0 Quantity: Decrease Quantity: Increase Quantity: Price: MSRP: Now: $89.99 Was: Subtotal: Add to Cart