Product Description
The Very Words "Monte Carlo"
There's something magical about the words "Monte Carlo." They bring to mind fun, adventure and gambling. But don't gamble with your 1973-77 Monte Carlo. Give it a radio made for it.
There are copycats, but nothing beats the original, whether it's the car or the city. The Custom Autosound USA-230 helps keep your car the champion of fun, adventure and excitement.
The USA-230 Difference
First, a power antenna lead helps the electronic tuner pull in your AM and FM stations with ease.
With 16 presets (12 FM, 4 AM), you have plenty of choice at your fingertips. To fine-tune your sound, there's a 4-way fader, a 1/8" aux input jack and 4-channel RCA pre-outs. Nothing but the best for the best car around.
To top it off, the USA-230 has 200 watts of power, and the sound it produces is hard to beat. Finally, there's the digital clock.
Where would anyone be without a clock? It keeps accurate time, so you'll have no excuse for being late for an appointment or a date.
Final Words
When you want fun, adventure and excitement, you buy a 1973-77 Monte Carlo. To add to it, you put in the USA-230, a radio that's all about fun, adventure and excitement.
This radio features:
● AM/FM stereo
● 200 Watts (4x50)
● Auxiliary Input (RCA Rear) RCA to 1/8" pin jack included
● Digital Clock
● Electronic Tuner
● 16 presets (12 FM, 4 AM)
● 4 Channel RCA Pre-outs
● 4-way fader
● Power Antenna Lead
Available with a black or chrome face
1973-77 Monte Carlo USA-230 In Dash AM/FM: Frequently Asked Questions
Do I need to modify the 1973-77 Monte Carlo dash to install it?
This version is built for the 1973-77 Monte Carlo and is made to fit the factory radio opening. Custom Autosound says its radios fit without altering or cutting the original dash.
What can I add to my 1973-77 Monte Carlo USA-230 In Dash AM/FM order?
The options on this page let you add a front dual voice coil speaker, a rear 6x9 speaker pair (Custom Autosound 6x9 Speaker Pair and Upgraded Pioneer Speaker Pair), and a hideaway antenna.
What do I get with the USA-230 in my 1973-77 Monte Carlo?
The electronic tuner stores 16 presets, 12 FM and 4 AM.
What features does the USA-230 have?
There's a rear RCA auxiliary input, and Custom Autosound includes an RCA to 1/8" pin jack cable for phones, MP3 players or satellite tuners. It skips the USB port, iPod dock and CD changer control found on the USA-630, but keeps the same look.
What can the USA-230 do?
It has a digital clock, a 4-way fader and a power antenna lead. It's rated at 200 watts (4x50) and has 4-channel RCA pre-outs, so you can add an outboard amplifier later.
USA-230 specifications
- 200 watts peak power (50W x 4)
- AM/FM stereo tuner
- RCA auxiliary input
- 12 FM and 4 AM presets
- Electronic tuning and volume
- 4-channel RCA pre-outs for an external amplifier
- Separate bass and treble controls
- 4-way fader and left/right balance
- Power antenna lead
- Designed for original classic dash openings (no DIN cut required for vehicle-specific faceplates)
- Custom Autosound 2-year manufacturer warranty
USA-230 wiring and tech tips
Use this as a head-unit reference for power, ground, antenna, speakers, and amplifier connections. Always match the printed diagram that ships with your unit if it differs.
Power and ground (typical Custom Autosound harness)
| Function | Wire color |
|---|---|
| Ignition / ACC +12V | Red |
| Battery / constant +12V | Yellow |
| Ground | Black |
| Power antenna | Blue |
Ignition and power-antenna leads are commonly fused at 1A on the harness—confirm against the guide that ships with your radio.
Speaker wiring (typical)
| Speaker | Wire color |
|---|---|
| Left front + / − | White / White-Black |
| Right front + / − | Gray / Gray-Black |
| Left rear + / − | Green / Green-Black |
| Right rear + / − | Violet (or Purple) / Violet-Black |
USA-230 extras
Use the rear RCA AUX for a wired player. Pre-outs support adding an amplifier later without replacing the radio.
Suggested order for a 1973-77 Monte Carlo
- Disconnect the vehicle battery before any wiring.
- Connect ground first, then constant (yellow) and ignition (red).
- Connect the antenna plug and the blue power-antenna lead if your car has a power antenna.
- Wire all four speakers, matching polarity.
- If using an amplifier, run RCA cables from the front/rear (and sub on USA-740/USA-850) pre-outs.
- Reconnect the battery and test radio, speakers, and charging system voltage.
Tech tips for 1973-77 Monte Carlo
- This radio is sold for the factory Monte Carlo opening used in 1973-77 models—do not cut a modern DIN rectangle if you want a stock look.
- A poor ground is the most common cause of whine or weak audio; scrape paint at the ground point and use a star washer.
- If AM reception is weak, check the antenna mast, cable continuity, and that the antenna plug is fully seated.
- Vintage Car Radio does not install radios. If you are not comfortable with 12V wiring, use a qualified installer.
USA-230 manuals
Download the manufacturer guide for operation, safety, and the official wiring diagram. You can also browse our full library on the Manuals page.
Vintage Car Radio does not offer installation. The manuals are for do-it-yourself reference or to share with your installer.
Two-Year Custom Autosound Warranty
All Custom Autosound radios sold by Vintage Car Radio are backed by a 2-year manufacturer warranty from Custom Autosound.
Radios are checked before shipping. If something is wrong out of the box or under warranty, call us at 844-802-4499 or 574-226-6676 and we will help coordinate with the manufacturer.
Vintage Car Radio does not offer installation services. Refer to the Manuals and Wiring / Tech Tips sections for manufacturer guidance, or use a qualified car-audio installer.
FAQ — 1973-77 Monte Carlo USA-230
Will this fit my 1973-77 Monte Carlo without cutting the dash?
It is built for the original radio opening used on 1973-77 Monte Carlo models. Compare your dash opening and bezel to the product photos. We do not modify dashes in-house.
Does this radio have Bluetooth?
The USA-230 is a wired/AUX-focused radio without built-in Bluetooth. Consider a USA-740 or USA-850 if you want Bluetooth built in.
Do I need an amplifier?
Many owners run speakers directly from the radio. Pre-outs are there if you want more volume or a subwoofer later.
Do you install the radio?
No. Vintage Car Radio ships the unit and documentation; installation is DIY or by a shop you choose.
What is the warranty?
Custom Autosound radios include a 2-year manufacturer warranty. See the Warranty section for details.
Need help?
Call 844-802-4499 or 574-226-6676.
Specs
Wiring / Tech Tips
Manuals
Warranty
Two-Year Custom Autosound Warranty
All Custom Autosound radios sold by Vintage Car Radio are backed by a 2-year manufacturer warranty from Custom Autosound.
Radios are checked before shipping. If something is wrong out of the box or under warranty, call us at 844-802-4499 or 574-226-6676 and we will help coordinate with the manufacturer.
Vintage Car Radio does not offer installation services. Refer to the Manuals and Wiring / Tech Tips sections for manufacturer guidance, or use a qualified car-audio installer.
