SoundXtreme ST-680 5x7/6x8" 3-Way Coaxial Speakers Crunch The PBR400X4D uses a compact

The PBR400X4D uses a compact metal amplifier chassis with integrated connection harnesses rather than large conventional terminal blocks

it does not provide signal outputs

A subsonic filter is also included for additional low-frequency system tuning

47 inches and front-loading depth is 1

SoundXtreme ST-680 5x7/6x8" 3-Way Coaxial Speakers Crunch The PBR400X4D uses a compactThe SoundXtreme ST 680 is a pair of 5x7 6x8 inch 3 way coaxial car speakers designed as a practical replacement for worn or underperforming factory door or rear deck speakers. Their dual fit sizing is intended for vehicles that use either a 5x7 inch or 6x8 inch speaker opening. The pair uses a 4 ohm design for connection to compatible car audio systems. These speakers are suited to everyday listeners who want a straightforward full range speaker