Product Description
The best radio for your car. To be the best, it has to be made by the best.
When you want a great radio for your 1968-81 Buick Riviera, look no further than the USA-630. It's about the best radio you can buy, made by one of the best classic car radio companies, Custom Autosound.
Buy from the best and you get the best sound for your classic. The USA-630 has everything you need.
Inside the Best
Look at the features and you'll see how good it really is. There isn't an inferior component in it:
- 300 watts of power
- An RDS electronic tuner
- 16 presets (12 FM, 4 AM)
- LCD screen that displays information in white letters over a black background
- USB port for MP3/WMA flash-drive playback; Bluetooth available with optional BluKit
- 4-channel RCA pre-outs
- 2-channel RCA input jacks
- 4-way fader
- Power antenna lead
- Digital clock
That's not all. You stay in complete control with volume, bass, treble and balance controls plus a built-in digital EQ, all easy to adjust at your fingertips.
Every feature works together, giving you a finely tuned radio in a finely tuned machine.
When You Want the Best
...turn to the Custom Autosound USA-630. It's everything you want a radio to be and more, and the perfect upgrade for your 1968-81 Buick Riviera.
Order yours today. It's a music experience you won't forget.
The USA-630 is the latest step in Custom Autosound's quest for the perfect classic car radio. Its large OEM-style push buttons look right at home in a classic dash, but behind them are modern features like an iPod dock. You can browse your iPod by artist, song, album or playlist from the radio's buttons, so the iPod can stay hidden in the glove box or console. A USB input on the back plays MP3/WMA files from a flash drive, and the alphanumeric display shows song, artist and album titles from USB, iPod and RDS radio stations. With the optional BluKit, you can stream music from a Bluetooth phone or player, skip tracks with the radio's track-up button, and take hands-free calls while the music mutes automatically. At 300 watts peak, it has all the power most people need. If you want more, four pre-out jacks on the back connect optional amplifiers, and an auxiliary input accepts satellite radio or any portable player.
The USA-630 Features:
• AM/FM stereo
• RDS tuner shows station / song / artist on LCD display
• 300 Watts Peak
• USB Port for Flash Drive MP3/WMA Playback
• iPod dock and control (control your iPod from the buttons on the radio)
• Direct 6 CD Changer Control
• Negative LCD display (Black background with white letters / numbers)
• Alpha Numeric Display for MP3/WMA/ iPod files
• Electronic Tuning and Volume Control
• Loudness compensation
• Digital EQ
• 4-way fader
• Left Right Balance
• Digital Clock
• 2 Channel RCA Auxiliary Input for Satellite etc. (cable included)
• 16 Presets (12 FM, 4 AM)
• 4 Channel RCA Pre-outs
• Separate Bass and Treble
• USA/Euro Tuner
• Power Antenna Lead
1968-81 Buick Riviera USA-630 In Dash AM/FM: Your Questions Answered
Will it fit my 1968-81 Buick Riviera without cutting the dash?
This listing is the version made for the 1968-81 Buick Riviera, designed to go into the original dash opening. Custom Autosound says its radios fit without altering or cutting the original dash.
How does the USA-630 handle phone audio and connections?
It also has digital EQ, separate bass and treble, loudness, a 4-way fader and a 2-channel RCA auxiliary input with cable included. It can directly control Custom Autosound's optional CD-1 player.
My 1968-81 Buick Riviera is 6-volt or positive ground. Can I still use this?
The order form has Voltage (6 and 12) and Ground (Positive and Negative) options, so set them to match your 1968-81 Buick Riviera.
What do I get with the USA-630 in my 1968-81 Buick Riviera?
Custom Autosound rates it at 300 watts peak (45 watts RMS x 4), with four RCA pre-outs for adding amplifiers. The RDS tuner shows station, song and artist information, and you get 16 presets (12 FM, 4 AM).
What features does the USA-630 have?
Bluetooth streaming and hands-free calling come from Custom Autosound's optional BluKit, which works with the USA-630. A USB port plays MP3 and WMA files from a flash drive, and the display shows artist and song titles.
Why does the order ask about factory air?
The Factory Air option tells us which dash layout your 1968-81 Buick Riviera has, so pick Yes if it has factory A/C.
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 1968-1981 Riviera
- 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 1968-1981 Riviera
- This radio is sold for the factory Riviera opening used in 1968-1981 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 — 1968-1981 Riviera USA-630
Will this fit my 1968-1981 Riviera without cutting the dash?
It is built for the original radio opening used on 1968-1981 Riviera 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.
