The C606 is Proficient's most affordable 6 1/2-inch ceiling speaker. It's a perfect choice for applications where good sound is desired but cost is a major factor. The C606 offers a great combination of sound quality and ease of installation. High sensitivity makes the C606 easy for any amplifier to drive. Bigger bass, smaller price. You'll be amazed when you hear how much sound Proficient's most affordable 6 1/2-inch ceiling speaker puts out. Its sturdy polypropylene woofer is the same type found in many high-quality bookshelf speakers. And its 3/4-inch soft-dome tweeter sounds surprisingly sweet-"no surprise when you learn it was engineered by the same team that designed Proficient's top in-wall, on-wall and bookshelf speakers. The C606's 90 dB sensitivity delivers high output even with low-powered multiroom audio amplifiers, so you can get the same volume with about half the power. The C606's forgiving 8-ohm impedance makes it easy to drive with any amplifier. It also fits into the same cutout as all of Proficient's other 6 1/2-inch ceiling speakers do, so it's easy to install. Includes Thin-Bezel Grilles held by Neo Magnets.