Product Description
Custom Autosound 1971-73 Cadillac USA-740 In Dash AM/FM
The Custom Autosound USA-740 is an exceptional audio upgrade for 1971-73 Cadillac owners, delivering a perfect blend of modern audio technology and vintage aesthetics. This state-of-the-art radio is designed to fit seamlessly into the dashboard of these classic Cadillacs, preserving the original look while offering advanced features that enhance the driving experience.
One of the most notable features of the USA-740 is its Bluetooth connectivity. This allows drivers to make hands-free phone calls and stream music wirelessly from their smartphones. Whether you prefer to listen to your favorite playlists, catch up on podcasts, or enjoy audiobooks, the USA-740's Bluetooth capability ensures a smooth and enjoyable audio experience, bringing modern convenience to your classic Cadillac.
The USA-740 also includes a USB port for playing MP3 and WMA files, as well as an auxiliary input for connecting external audio devices. These features provide versatile options for playing your favorite music, making it easy to enjoy high-quality sound from a variety of sources. Additionally, the radio is equipped with a built-in digital clock and a multi-color LCD display, offering a clear and stylish interface that complements the Cadillac’s interior.
For those who appreciate traditional radio, the USA-740 offers AM/FM tuning with 30 presets (18 FM and 12 AM), allowing you to easily switch between your favorite stations. The radio also features RDS (Radio Data System) capability, which displays additional information like song titles and artist names on the screen, enhancing the overall listening experience.
Installation is straightforward, thanks to the USA-740's custom design for the 1971-73 Cadillac models. The radio fits perfectly into the original dash openings, requiring no modifications to the vehicle’s interior. This ensures that the classic look of your Cadillac remains intact while enjoying the benefits of modern audio technology.
In summary, the Custom Autosound USA-740 is an ideal audio solution for 1971-73 Cadillac owners who want to enhance their driving experience with modern features without compromising the vintage aesthetic of their vehicle. Its blend of Bluetooth connectivity, USB and auxiliary inputs, AM/FM tuning, and easy installation make it a top choice for classic car enthusiasts seeking high-quality sound and contemporary convenience.
Custom Autosound USA-740 Classic Car Radio With Bluetooth USA-740 Radio with Bluetooth Features:
- AM/FM Radio Bluetooth, USB & Auxiliary Inputs
- Option to Add CD-1, Single CD Player
- Bluetooth is Built Into the Radio
- Fits in your Original Dash Opening Without Cutting
- 3.5mm Aux Input on Front of Radio
- RCA Aux Input On Back
- Change Display Lettering Color
- Digital Tuner
- RDS Song/Artist Information
- 5 Channel RCA Pre-Outs w/ Subwoofer Control
- Separate Bass & Treble Control
- 5 EQ Presets
- Fader and Balance Control
- 15 FM & 10 AM Pre Sets
- Seek/Scan Function
- Back by a 2 Year Warranty from the Manufacturer
Frequently Asked Questions About the 1971-73 Cadillac USA-740 In Dash AM/FM
Is this radio made specifically for the 1971-73 Cadillac?
This listing is the version made for the 1971-73 Cadillac, designed to go into the original dash opening. Custom Autosound says its radios fit without altering or cutting the original dash.
What about older positive-ground electrical systems?
The order form has Voltage (12 volt and 6 volt) and Ground (Negative and Positive) options, so set them to match your 1971-73 Cadillac.
What do I get with the USA-740 in my 1971-73 Cadillac?
There are two auxiliary inputs, a front mini jack and a rear RCA. Custom Autosound rates it at 300 watts peak, and it adds hi-volt 4-channel RCA pre-outs plus a subwoofer line-out.
What features does the USA-740 have?
The USB port plays MP3, WMA, FLAC and WAV files from a flash drive. The AM/FM RDS tuner holds 25 presets (15 FM, 10 AM) and can auto-store the strongest stations.
Is there a CD or Bluetooth upgrade?
Check the CD options on this page, which include Single Slave CD.
How does the USA-740 handle phone audio and connections?
You can pick from multiple LCD colors to match your gauges, with a dimmer, and it fully controls the optional CD-1 player. Bluetooth is built in, with a microphone included, so you can stream music and answer calls.
USA-740 specifications
- Bluetooth built in (streaming and hands-free calling)
- 300 watts peak power (45W x 4 RMS, 2-ohm stable)
- AM/FM stereo tuner
- 2 AUX inputs (3.5 mm front and RCA rear)
- USB port
- Direct control for optional CD-1
- 5-channel RCA pre-outs including subwoofer pre-out and control
- 15 FM and 10 AM presets
- 7-color LCD with dimmer; RDS station/song/artist display
- DSP EQ; auto-store presets
- Electronic tuning and volume; separate bass/treble; 4-way fader; L/R balance
- Power antenna lead; digital clock
- USA/EUR/JAP/RUS tuner capability (USA default)
- Custom Autosound 2-year manufacturer warranty
USA-740 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-740 extras
Expect antenna, USB, microphone (Bluetooth), CD-1, and subwoofer RCA connections in addition to front/rear line outs. Use the front 3.5 mm AUX or rear RCA AUX for wired sources.
Suggested order for a 1971-1973 Cadillac
- 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 1971-1973 Cadillac
- This radio is sold for the factory Cadillac opening used in 1971-1973 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-740 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 — 1971-1973 Cadillac USA-740
Will this fit my 1971-1973 Cadillac without cutting the dash?
It is built for the original radio opening used on 1971-1973 Cadillac models. Compare your dash opening and bezel to the product photos. We do not modify dashes in-house.
Does this radio have Bluetooth?
Yes—Bluetooth is built into the USA-740 for streaming and hands-free calling.
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.
