Product Description
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.
Custom Autosound has been delivering great sound in classic cars for decades, and its USA-630 is a perfect replacement radio for the classic 1975-77 Oldsmobile Cutlass. This top-of-the-line radio has AM/FM stereo and an RDS tuner that shows artists, songs and stations on its clear LCD screen. It has 300 watts of power, 100 watts more than the USA-230, which is a lot of power for its size. Its redesign offers an improved experience in your classic.
The USA-630 has a USB port for WMA and MP3 playback and direct control of a 6-disc CD changer. The negative display with its black background gives it a special look. Custom Autosound took great care to make it look classic so it blends perfectly into a 1975-77 Cutlass, and the alphanumeric display of iPod, WMA and MP3 files adds a modern touch. Volume control and electronic tuning are seamless, with loudness compensation.
It has a digital EQ, 4-way fader, an always-on digital clock and left/right balance. It also has a 2-channel RCA auxiliary input and 16 presets (12 FM, 4 AM) to save you time. Treble and bass controls deliver clean sound, the tuner switches between USA and Euro frequencies, and a power antenna lead helps you enjoy your favorite stations. Vintage Car Radio listened to its customers and added this great Custom Autosound radio to its lineup.
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
1975-77 Cutlass USA-630 In Dash AM/FM: Your Questions Answered
Is this radio made specifically for the 1975-77 Cutlass?
This listing is the version made for the 1975-77 Cutlass, designed to go into the original dash opening. Custom Autosound says its radios fit without altering or cutting the original dash.
What can I add to my 1975-77 Cutlass USA-630 In Dash AM/FM order?
You can add a front dual voice coil speaker, a rear 6x9 speaker pair (Custom Autosound 6x9 Speaker Pair and Upgraded Pioneer Speaker Pair), kick panels (W/Speakers, W/O Speakers, and Pioneer Upgrade), and a hideaway antenna right from the options above.
What can the USA-630 do?
Bluetooth streaming and hands-free calling come from Custom Autosound's optional BluKit, which works with the USA-630. The RDS tuner shows station, song and artist information, and you get 16 presets (12 FM, 4 AM).
Is there a CD or Bluetooth upgrade?
Yes. The options include Single Slave CD and Bluetooth Adapter.
What do I get with the USA-630 in my 1975-77 Cutlass?
Custom Autosound rates it at 300 watts peak (45 watts RMS x 4), with four RCA pre-outs for adding amplifiers. A USB port plays MP3 and WMA files from a flash drive, and the display shows artist and song titles.
My 1975-77 Cutlass is 6-volt or positive ground. Can I still use this?
Choose your system under Voltage (12 volt and 6 volt) and Ground (Negative and Positive) when you order.
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 1975-1977 Cutlass
- 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 1975-1977 Cutlass
- This radio is sold for the factory Cutlass opening used in 1975-1977 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 — 1975-1977 Cutlass USA-630
Will this fit my 1975-1977 Cutlass without cutting the dash?
It is built for the original radio opening used on 1975-1977 Cutlass 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.
