$200 obo , serious offers only . The Proficient Audio C625 is a popular 6.5-inch in-ceiling speaker known for delivering great sound in smaller spaces like bathrooms or hallways, often in its C625TT dual-channel (stereo) version with dual voice coils and tweeters for single-speaker stereo, or the standard C625 with a graphite woofer and silk tweeter for clearer, powerful audio at a mid-range price, both featuring high sensitivity for easy amplification and simple dogleg mounting.