Product Description
There is life before and after the Corvette, after which the history of cars made a U-turn to the right direction. The most smooth and graceful of the Corvette vehicles came equipped with some of the very first AM radio designs, but that would hardly work in today’s automobiles. In modern times quality sounds are a must have and without the sought sound for a classic car, the experience just would not be the same. During the early stages of car stereos, a single speaker fixed in the dash was sufficient. When you add a twisted reception device, your system was as complete as any other car on the road. Yet it is that classic look that has become one of the many things that true and loyal car accumulators adore about the Corvette. The challenge for the ravenous collector is to keep that stock setup with advanced-technology thorough capabilities. Let’s face it, no matter how flawless your Corvette looks on the outside, you must have the quality sounds to go with it. When you are driving down the open interstate with the top down listening to a static filled AM station through a single speaker - it just takes the ambiance away. No matter what, you just can't get great quality sound out of a noisy convertible with 1960’s technology. Yet, all is not lost. The dazzling minds of Custom Autosound along with the creators at Ken Harrison Radios have a sustainable solution. The USA-740 unites that classic look with today’s technology.
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
You can be sure that they have done their homework, and you will discover that your contemporary sound is just an online order away. The innovative Corvette utilizes a positive ground electrical basis; the vast majority of the original stereos available today only operate with a negative ground electrical context. The installation of a customized USA-740 disregards this along with all other obstacles instantly. The correct wiring system is already in place and Custom Autosound makes the conversion as simple as tying your shoe with any and all potential issues already taken care of for you. After installing the 740 system, you can enjoy the pleasures of pure sounds coming from that unique look. It is a custom car marriage made in restoration heaven.
Best of all Custom Autosound backs covers USA-740 with a multi-year warranty. We’ve told you they are serious about their work. As for the dear Corvette collector, they all love how the USA-740 has made the top-down-tune-playing-life that much easier, and satisfying!
USA-740 IN DASH AM/FM for Corvette FAQ
Do I need to modify the Corvette dash to install it?
This version is built for the Corvette and is made to fit the factory radio opening. Custom Autosound says its radios fit without altering or cutting the original dash.
Is there a CD or Bluetooth upgrade?
Check the CD options on this page, which include Single Slave CD.
What can I add to my USA-740 IN DASH AM/FM for Corvette 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.
Why does the order ask about factory air?
Select Yes or No under Factory Air so we send the correct setup for your Corvette's dash.
What can the USA-740 do?
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.
What do I get with the USA-740 in my Corvette?
Bluetooth is built in, with a microphone included, so you can stream music and answer calls. The AM/FM RDS tuner holds 25 presets (15 FM, 10 AM) and can auto-store the strongest stations.
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 classic Corvette
- 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 classic Corvette
- This radio is sold for the factory Corvette opening used in classic 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 — classic Corvette USA-740
Will this fit my classic Corvette without cutting the dash?
It is built for the original radio opening used on classic Corvette 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.
