Dodge St. Regis Speaker Size

Speaker size, type, and location chart for Dodge St. Regis models from 1979 to 1981 production years.

As an Amazon Associate, we may earn a commission from purchases made through links marked. Read more in our disclaimer.

Dashboard Speaker

YearsTypeSize (inch)
1979 - 1981Full-Range3.5

Rear Speaker

YearsTypeSize (inch)
1979 - 1981Full-Range6x9

Dodge St. Regis Speaker FAQ

What speakers should I replace first in my Dodge St. Regis?

Replace the 6 x 9 rear speakers first. They handle most of your bass response and mid-range output - around 20-150 Hz typically. The dashboard 3.5 inch speakers are secondary since they're mainly for high frequencies and vocal clarity. Your Dodge St. Regis rear location has more mounting space too, which means better power handling. Start with 60-80 watts RMS coaxials in the rear. The dashboard speakers can wait unless they're completely blown.

Can I install component speakers in the rear 6 x 9 location of my Dodge St. Regis?

Yes, but it's tricky. The 6 x 9 rear spot accepts coaxial, component, or full-range types. Component separates give you better soundstaging - tweeter placement becomes critical though. You'd need to mount the tweeter somewhere on the rear deck or package tray. Crossover networks need secure mounting too. Most people stick with quality coaxials for the Dodge St. Regis rear because... well, it's simpler and still sounds good. Consider components if you're doing a full system upgrade with amplification.

What's the impedance requirement for Dodge St. Regis dashboard speakers?

Standard 4-ohm impedance works for the 3.5 inch dashboard location. Your factory head unit probably outputs 15-20 watts per channel. Don't go below 4 ohms or you might stress the amplifier section. 8-ohm speakers will work but they'll be quieter - maybe 3dB less output. The Dodge St. Regis dashboard mounting is pretty straightforward, just watch the depth clearance. Some aftermarket 3.5 inch speakers are deeper than factory units.

Why does my Dodge St. Regis sound better with full-range speakers in the rear?

Full-range speakers often have simpler crossover networks - less phase issues, fewer components to fail. The 6 x 9 rear location in your Dodge St. Regis gets decent airspace behind it, so a full-range driver can move more freely. Bass response improves when the speaker doesn't have to share duties with a separate woofer. Coaxials split frequencies internally but full-range handles everything with one cone. It's... more coherent sometimes, especially at moderate volume levels.

What power handling should I look for in 6 x 9 speakers for the Dodge St. Regis?

Target 50-75 watts RMS for the rear 6 x 9 location. Peak power ratings are usually inflated - ignore those numbers. Your Dodge St. Regis factory system probably pushes 20 watts or less, so even 50-watt speakers will be an upgrade. Higher power handling means better dynamic range and less distortion at volume. The rear mounting provides decent cooling airflow too. Don't exceed 100 watts RMS unless you're adding amplification - the factory wiring might not handle it properly.