Our KNW2008, bracketed dual dash mount speaker consists of two, Kenwood 4" speakers that are mounted on a board that has a bracket attached to it to give you stereo sound from the original, mono location. The bracket is designed to allow you to mount the speaker in a vehicle that either came with a bracket originally or does not have studs behind the dash for speaker mounting. This KNW2008 dual dash mount speaker is designed to act like your original 4x10 speaker, but provide better sound. The KNW2008 dual dash mount speaker has two, 4 ohm speakers and is designed to work with our modern, replacement radios. If you have an original 8 or 10 ohm radio, you may still use this speaker, but you will have to wire it in series and may or may not have to add an inline resistor. Please be careful when using with an original mono radio as improper wiring may fry your original, 8 or 10 ohm radio.