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which are designed to outperform the factory woofers for both subwoofer and midbass frequencies
**Note: The ProTool app is only available for Android mobile devices such as tablets and phones through the Google Play Store
It's that simple
ProTool by BimmerGeeks puts the power of a BMW specialist in the palm of your hand
It is programmed with the Split Second R4 engine management software included on CD or available for download here
Stage One BMW Speaker Upgrade for E83 X3 with Standard Hi-Fi G2x 3 series which are designed to outperformGET UNBELIEVABLE, CRYSTAL CLEAR SOUND. JUST BY REPLACING YOUR BMW'S SPEAKERS We took your factory BMW speakers and re engineered our upgrade for one thing: clarity. So you can simply swap your original speakers for ours without changing anything else in your audio system, and the result is smooth, natural, yet unbelievably detailed reproduction of your favorite music. PLAY YOUR MUSIC LOUDER. AND ENJOY EVERY NOTE: We engineered the Stage One speakers
