What size speakers are in a 1994 Chevy Blazer?
In most 1994 Blazer models, the factory speakers are 4x6 inches in the front doors and the rear doors.
This article explains typical sizes, how to verify your exact setup, and upgrade options for owners restoring or upgrading the audio system.
Typical speaker sizes you’ll encounter
Before listing the sizes, note that these are the standard sizes found in the common trims of the era.
- Front doors: 4x6 inch speakers (rectangular, standard for many GM trucks of the period).
- Rear doors: 4x6 inch speakers (the same size as the front doors in most configurations).
These sizes apply to the vast majority of 1994 Blazers. There are occasional variations if a dealer-installed upgrade or a later aftermarket radio was used, but 4x6 inch door speakers are the baseline for stock setups.
Upgrade considerations and options
If you’re upgrading the audio system, keep these considerations in mind to ensure a proper fit and sound quality.
Common upgrade approaches
When upgrading, you’ll typically replace with 4x6 inch aftermarket components or coaxials, paying attention to mounting depth and impedance.
- Choose 4x6" two-way coaxial speakers for straightforward replacement; verify mounting depth fits behind the door panel.
- Consider 4x6" component sets if you want improved highs with a separate tweeter, noting installation may require brackets or wiring changes.
- Check impedance (4 ohms is common) and power handling to ensure compatibility with your head unit or any amplifier.
Upgrading may require door-panel removal, spacers or mounting adapters, and careful attention to weather sealing and wiring harness compatibility.
How to verify the exact size on your vehicle
To confirm the precise size for your Blazer, inspect the door opening or consult the service manual and parts catalog. The door panel must be removed to measure the mounting opening accurately.
- Measure the mounting hole dimensions to confirm 4x6 inches and note the mounting depth.
- Identify the speaker impedance and the recommended power rating from the factory head unit or the replacement speaker specifications.
With these checks, you’ll know exactly what size and specification you need for replacements or upgrades.
Summary
The 1994 Chevy Blazer commonly uses 4x6 inch speakers in both the front and rear doors. For upgrades, 4x6 aftermarket options are a natural fit, but always verify mounting depth and impedance before purchasing. A door-panel removal will help ensure a precise, secure installation.
