Product Description
Custom Autosound 1940-48 Chevy USA-740 In Dash AM/FM 1
The Custom Autosound USA-740 is an exceptional choice for upgrading the audio system of a 1940-48 Chevy, seamlessly blending modern technology with the classic aesthetic of this iconic vehicle. Available from Vintage Car Radio, this advanced unit brings contemporary audio features to the vintage dashboard, enhancing both functionality and style without compromising the car’s original charm.
The USA-740 maintains the classic look of the 1940-48 Chevy with its period-correct design. It features authentic chrome push buttons and knobs that perfectly match the car’s interior, preserving its timeless appeal. This meticulous attention to detail ensures that the radio complements the vehicle's classic dashboard, providing a harmonious and genuine appearance that appeals to classic car enthusiasts.
Beneath its vintage exterior, the USA-740 is packed with modern features. Bluetooth connectivity is a standout feature, allowing hands-free calling and wireless music streaming from smartphones and other Bluetooth-enabled devices. This enhances convenience and safety, enabling drivers to stay connected while keeping their hands on the wheel and eyes on the road.
The USA-740 also offers USB and auxiliary inputs, providing versatile options for playing music from various devices. The USB port supports playback and charging from flash drives, while the auxiliary input accommodates any device with a headphone jack. Additionally, the radio includes CD changer control for those who prefer using an external CD player.
The sound quality of the USA-740 is impressive, with a powerful 300-watt amplifier delivering clear and robust audio that enhances the overall driving experience. The AM/FM tuner comes with 30 pre-sets, making it easy to switch between favorite radio stations. For those looking to expand their audio system, the radio features four-channel pre-amp outputs and a subwoofer output, allowing for further customization with additional amplifiers and subwoofers.
Installation of the USA-740 is designed to be straightforward, fitting the existing dash openings of the 1940-48 Chevy without requiring any modifications. This plug-and-play compatibility ensures a hassle-free upgrade process, making it an excellent choice for both professional installers and DIY enthusiasts.
In conclusion, the Custom Autosound USA-740 from Vintage Car Radio is an outstanding audio upgrade for the 1940-48 Chevy. It skillfully combines modern features like Bluetooth connectivity and multiple audio inputs with a design that enhances and respects the vehicle's classic aesthetic. This radio not only elevates the driving experience but also preserves the timeless appeal of one of America’s most beloved classic cars.
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
1940-48 Chevy USA-740 In Dash AM/FM FAQ
Do I need to modify the 1940-48 Chevy dash to install it?
This version is built for the 1940-48 Chevy 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 1940-48 Chevy USA-740 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 an antenna (Hideaway Antenna and Power Antenna).
My 1940-48 Chevy is 6-volt or positive ground. Can I still use this?
What if my 1940-48 Chevy has air conditioning?
Select Yes or No under Factory Air so we send the correct setup for your 1940-48 Chevy's dash.
What else should I know about the USA-740?
The USB port plays MP3, WMA, FLAC and WAV files from a flash drive. Custom Autosound rates it at 300 watts peak, and it adds hi-volt 4-channel RCA pre-outs plus a subwoofer line-out.
Is there a CD or Bluetooth upgrade?
Yes. The options include Single Slave CD.
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 1940-1948 Chevy
- 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 1940-1948 Chevy
- This radio is sold for the factory Chevy opening used in 1940-1948 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 — 1940-1948 Chevy USA-740
Will this fit my 1940-1948 Chevy without cutting the dash?
It is built for the original radio opening used on 1940-1948 Chevy 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.
