Product Description
Custom Autosound 1954-56 Buick Century USA-740
The Custom Autosound USA-740 is an ideal upgrade for 1954-56 Buick Century owners who want to modernize their audio system while preserving the classic aesthetics of their vehicle. This radio is designed to fit seamlessly into the original dash, providing contemporary audio features without compromising the vintage look of the Buick Century.
One of the standout features of the USA-740 is its Bluetooth capability, which allows for wireless streaming of music and hands-free calling. This feature enhances the driving experience by enabling drivers to play their favorite music or take calls without the hassle of wires. The Bluetooth functionality is complemented by additional connectivity options, including USB and auxiliary inputs, offering flexibility in connecting various audio devices.
The USA-740 is equipped with a powerful AM/FM tuner that boasts 25 presets, ensuring easy access to favorite radio stations. The tuner delivers clear and strong reception, making radio listening a pleasure. For those who prefer digital music, the USB port supports playback from flash drives, while the auxiliary input enables connection to MP3 players, smartphones, and other audio sources.
Sound quality is a significant strength of the USA-740. It features a built-in 300-watt amplifier that produces crisp and powerful audio. The unit also includes four-channel RCA pre-outs, facilitating the connection of additional amplifiers or subwoofers for those who want to elevate their audio experience further. With separate bass, mid-range, and treble controls, users can customize the sound to their liking, ensuring an optimal listening experience.
The design of the USA-740 is another highlight. Its classic appearance, complete with chrome-plated knobs and buttons, matches the vintage style of the 1954-56 Buick Century’s interior. The digital display is subtly integrated, providing modern functionality without detracting from the car's original look.
Installation of the USA-740 is straightforward, thanks to its custom fit for the 1954-56 Buick Century. The package includes all necessary hardware and wiring, making it easy for enthusiasts to upgrade their vehicle’s audio system without extensive modifications.
In summary, the Custom Autosound USA-740 is an excellent choice for 1954-56 Buick Century owners who want to enjoy modern audio features while maintaining the classic look of their car. With its Bluetooth capability, versatile connectivity options, powerful sound performance, and vintage design, the USA-740 offers a perfect blend of past and present for classic car audio enthusiasts.
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
1954-56 Buick Century USA-740: Frequently Asked Questions
Will this fit my car?
In our year/make/model search it's listed for the 1954-1956 Buick Century and 1956 Buick Roadmaster. Use the vehicle search to confirm your exact car.
Does it look like the original radio?
Yes. It's built to keep the original look in the 1954-56 Buick Century dash while adding modern features.
What about older positive-ground electrical systems?
Choose your system under Voltage (12 volt and 6 volt) and Ground (Negative and Positive) when you order.
Why does the order ask about factory air?
The Factory Air option tells us which dash layout your 1954-56 Buick Century has, so pick Yes if it has factory A/C.
How does the USA-740 handle phone audio and connections?
Bluetooth is built in, with a microphone included, so you can stream music and answer calls. There are two auxiliary inputs, a front mini jack and a rear RCA.
What else should I know about the USA-740?
You can pick from multiple LCD colors to match your gauges, with a dimmer, and it fully controls the optional CD-1 player. Custom Autosound rates it at 300 watts peak, and it adds hi-volt 4-channel RCA pre-outs plus a subwoofer line-out.
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 1954-1956 Buick Century
- 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 1954-1956 Buick Century
- This radio is sold for the factory Buick Century opening used in 1954-1956 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 — 1954-1956 Buick Century USA-740
Will this fit my 1954-1956 Buick Century without cutting the dash?
It is built for the original radio opening used on 1954-1956 Buick Century 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.
