Orion Cobalt CT-T15 PAIR of 1" 300 Watt 4-Ohm Flush-Mount Car Audio Tweeters Subwoofers/15" Subs and the enclosure's 4-ohm impedance

and the enclosure's 4-ohm impedance allows compatibility with a wide range of amplifiers

It makes it pretty easy to measure the output of a headunit directly

DODGE Durango Hellcat 6

-Impedance: 4 ohms

Bullet Tweeter 100 Watts MAX

Orion Cobalt CT-T15 PAIR of 1" 300 Watt 4-Ohm Flush-Mount Car Audio Tweeters Subwoofers/15" Subs and the enclosure's 4-ohm impedanceFeatures & Specifications: Mylar Diaphgram Neodymium Magnet Ferro Fluid Cooled Voice Coil High Temperature Abs Housings Complete With Flush And Surface Mount Hardware 30w Rms 300w Max Music Power Frequency Response: 1. 5khz ~ 30khz Sensitivity: 90. 7db W M 4 Ohms Impedance Orion CT T15 Cobalt Series 300 Watts Max Power Car Audio Tweeters