Product Description
This radio gives your Buick Roadmaster great sound and modern technology while keeping the dash looking classic. It installs without any dash modifications, unlike many radios that leave the dash looking butchered. The USA-630 is the result of three decades of Custom Autosound's work toward the ideal classic car radio, and its OEM-style push buttons complete the original look. A USB cable on the back of the radio plays MP3/WMA files and is long enough to tuck into the ashtray or glove box for easy access. There's also an iPod dock. The alphanumeric display is 30% larger than on earlier models and shows the song, artist and album. You get AM/FM, an auxiliary input for satellite radio, and Bluetooth streaming with hands-free calling through the optional BluKit. With 300 watts of power, RCA pre-outs for optional amplifiers and built-in CD changer control, it has all the power and flexibility you need. It's a perfect fit for the 1954-56 Buick Roadmaster, and we keep this model in stock.
The USA-630 keeps the retro look intact, and its large OEM-style push buttons add to your Roadmaster's interior. It supports iPod navigation, plays WMA/MP3 files, and streams music from Bluetooth devices with the optional BluKit. When a call comes in, the music mutes automatically for hands-free talking. Here are the features:
| Features
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1954-56 Buick Roadmaster USA-630 In Dash AM/FM: Your Questions Answered
Will this fit my car?
In our year/make/model search it's listed for the 1954-1956 Buick Roadmaster. Use the vehicle search to confirm your exact car.
How does the USA-630 handle phone audio and connections?
Custom Autosound rates it at 300 watts peak (45 watts RMS x 4), with four RCA pre-outs for adding amplifiers. It can directly control Custom Autosound's optional CD-1 player.
Which add-ons are offered with this radio?
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-630 in my 1954-56 Buick Roadmaster?
A USB port plays MP3 and WMA files from a flash drive, and the display shows artist and song titles. Bluetooth streaming and hands-free calling come from Custom Autosound's optional BluKit, which works with the USA-630.
Why does the order ask about factory air?
The Factory Air option tells us which dash layout your 1954-56 Buick Roadmaster has, so pick Yes if it has factory A/C.
What can the USA-630 do?
The RDS tuner shows station, song and artist information, and you get 16 presets (12 FM, 4 AM). It also has digital EQ, separate bass and treble, loudness, a 4-way fader and a 2-channel RCA auxiliary input with cable included.
USA-630 specifications
- 300 watts peak power (45W x 4 RMS)
- AM/FM stereo tuner
- USB port for flash-drive playback (MP3/WMA/FLAC/WAV)
- Optional Bluetooth via BluKit add-on (sold separately)
- RCA auxiliary input (rear)
- Direct control for optional CD-1 changer
- 4-channel 5V RCA pre-outs
- Digital clock
- 7-color LCD display with dimmer
- Alphanumeric display for USB/iPod/RDS info
- Separate bass and treble; 4-way fader; L/R balance
- 25 presets (15 FM / 10 AM)
- Loudness compensation
- Power antenna lead
- USA/EURO/JAP/AUS/RUS tuner capability
- Custom Autosound 2-year manufacturer warranty
USA-630 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-630 extras
USB and iPod/dock leads share a cable near the antenna jack on many units. RCA jacks on top are typically labeled AUX IN, REAR, and FRONT (line out). Bluetooth requires the optional BluKit unless your package already includes it.
Suggested order for a 1954-1956 Buick Roadmaster
- 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 Roadmaster
- This radio is sold for the factory Buick Roadmaster 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-630 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 Roadmaster USA-630
Will this fit my 1954-1956 Buick Roadmaster without cutting the dash?
It is built for the original radio opening used on 1954-1956 Buick Roadmaster 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-630 supports Bluetooth with the optional BluKit add-on (sold separately).
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.
