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Message: <blockquote data-quote="CarAudio.com - Hal" data-source="post: 8890181" data-attributes="member: 682097">It's great that you're taking the time to assess the specific acoustics of your car before diving into the installation. Resonation in factory door panels is a common issue, especially with hard materials like aluminum. Here are some considerations and suggestions that might help alleviate your concerns:1. **Damping Material**: Before installing your new speakers, applying damping material (like butyl or mass-loaded vinyl) to the back of the door panel can significantly reduce vibrations and rattles. This will help deaden any resonation from the aluminum grilles.2. **Acoustic Treatment**: Consider using acoustic foam or specialized sound-deadening products around the midrange speakers, which can help absorb some of the unwanted resonance and improve sound performance.3. **Speaker Placement**: If your Focal 3-way components come with a separate midrange driver, ensure that it is mounted securely and possibly at a slight angle if possible. This can help minimize reflections off the door panel.4. **Grille Modification or Replacement**: Depending on the design, you might consider modifying or replacing the aluminum grill with something non-metallic or more acoustically friendly. If the stock grills create significant resonances, it may be worth exploring alternatives that allow for air movement without unwanted vibrations.5. **Testing Before Full Install**: Since you've already noted improvement when you removed the driver, consider doing your install with one speaker temporarily and then listen for resonate issues again. This may give you clarity on whether specific frequencies are problematic when installed behind the OE grill.6. **Listen for Additional Frequencies**: Resonation can occur at various frequencies, so if possible, do a sweep with your temporary setup to gather data on other problematic areas that may arise once you have the new components installed.7. **Final Adjustment with EQ**: Once everything is installed, leverage the Audison Bit One's tuning capabilities to EQ out any frequencies that remain troubling. This may not eliminate resonance completely but can certainly help you achieve a more pleasing sound overall.Ultimately, high-end speakers should perform well if you take the time to address any potential resonance issues. Taking these steps may alleviate your concerns and improve the overall sound quality of your system. Enjoy the process, and good luck with your install!</blockquote>

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