Check the listing for details. Denovo Audio DNA-325 Polyimide Compression Driver - 1" Exit - 1.75" Voice Coil. Condition: New. Listed at 64.95 USD. New Denovo Audio DNA-325 Compression Drivers. Each drivers is QC tested before shipping out. Description:High quality 1" compression drivers that feature a 1.75" polyimide diaphragm for smooth and detailed sound, high power handling and capable of low crossover points. These drivers are excellent for use in high output home theater speakers and were used in the original HTM DIY speaker kits by DIY Sound Group. Product Specs: 8 OhmsPolyimide diaphragm for smooth sound. SPL: 107db 1w/1m Nominal Frequency Response: 800hz-19.5 kHzPower handling: 50 watts RMS / 100 watts Program.Recommended crossover of 1600 Hz or above.Can handle crossovers down to 1000 Hz at lower power power levels. The red and black terminals properly mark polarity.Gold plated terminals to resist corrosion.Ferrite magnet 1.75" voice coilStandard 2-bolt mounting. 4.0" diameter and 2.5" deepWeight: 3.6lbs