I went to PhD looking for subwoofers. I decided on an 8inch micro sub +. They installed it that afternoon. The sub worked well and sounded great but wasn't enough bump for me. I went back and upgraded. Now it is exactly what I want. The staff here are experts rather than retailers. They will tell you what works and what doesn't. That doesn't seem to sit well with some people but I am grateful for the expert consultation. They are also very transparent about pricing which I appreciate. read more