2020 BMW K1600 The small footprint of the ARC Audio and JL Audio amplifiers allowed them to both fit into one bag. The amplifiers were mounted on a custom-cut piece of plastic. The enclosure is designed for 1 10″ subwoofer. JBL tweeters are added to augment the high frequency output from the rear. ARC Audio coaxials and JBL tweeters were used for the front stage. Our speaker upgrades provided the client with a 2 wheel concert. The ARC Audio speakers we used in the back use a horn-loaded tweeter. The panels were molded specifically for the BMW bikes. The upward firing rear speakers provide a direct path to the rider’s ears.