A terminal block including a body, a plug, and a lever. The plug extends from the body to connect to an outlet. As the plug connects to an outlet, the plug is configured to receive an electrical pin and/or another conductor. In one example, the outlet and pin are part of an audio device. The body is configured to receive a wire and/or another conductor. The lever is configured to actuate between an open position and a closed position. In the open position, the lever is configured to compress an internal spring to receive a wire. In the closed position, the lever is configured to release the spring such as to retain the wire.