Product Description
Classic Chevrolets are the heart of the hobby, from Tri-Five cars to sixties full-size models. This Custom Autosound USA-850 is listed for Chevy, made to fit the factory radio opening, with Bluetooth, USB and the DigaDial display.
DigaDial Display
The USA-850's DigaDial virtual screen lets you choose from four distinct displays, so you can pick the look that suits your dash, including a working analog-style dial.
Features
- Bluetooth for streaming music and hands-free calls
- USB port that plays MP3, WMA and FLAC files and charges your phone
- Rear RCA auxiliary input
- Control of the optional CD-1 single CD player
- 6-volt RCA pre-outs and dual subwoofer outputs
- Bass, treble and midrange controls plus DSP EQ (Flat, Classic, Pop, Rock)
- Simple 3-wire power harness and labeled speaker harness
- 75 watts x 4 peak (300 watts max)
Ordering
The order form asks for Year, Make and Model, Factory Air, Voltage and Ground so we send the right setup. You can also add:
- CD Player: add a CD player that works with the radio
- Front dual voice coil speaker, which plays both stereo channels through a single dash speaker
- Rear 6x9 speaker pair, Custom Autosound or upgraded Pioneer
- Antenna: hideaway antenna or power antenna
Built for Amplifiers
The 6-volt pre-outs send a strong, clean signal to external amplifiers, and the dual subwoofer outputs let you add bass while keeping front and rear channels.
Confirm Your Model
This listing covers Chevy vehicles broadly. Contact us with your model and year so we can confirm the right version before you order.
Electrical Requirements
The USA-850 needs 12-volt negative ground. For 6-volt negative ground systems Custom Autosound makes the NGVB-HC voltage booster, and for positive ground systems the PGPI-HC power inverter. Set the Voltage and Ground menus to match your car.
Installation
The 3-wire power harness and labeled speaker harness make installation straightforward for most owners. Check the wiring, add a fuse to the power lead and test before reassembling the dash.
Warranty
Custom Autosound radios sold by Vintage Car Radio carry a 2-year warranty.
Fit Questions
Dashes changed often, even within a model line. If you are unsure which version you need, have your year, model and any dash changes ready when you contact us.
Amplifier Ready
The 4-channel RCA pre-outs make it easy to add an amplifier for more power or a subwoofer for deeper bass, without replacing the radio.
Everyday Use
Presets, seek and a clear display make the radio easy to live with, and the auxiliary input means your phone's music, podcasts and navigation prompts can come through the car's speakers.
Choosing Speakers
Many classics have one dash speaker. A dual voice coil speaker carries both stereo channels from that location, and a rear 6x9 pair, Custom Autosound or upgraded Pioneer, fills in the back.
Custom Autosound USA-850 for Chevy FAQ
Will it fit my Chevy?
This is the Chevy version, made to fit the factory radio opening. Contact us to confirm fit for your year.
Does it have Bluetooth?
Yes, for streaming and hands-free calls.
Can I play FLAC files?
Yes, from a USB flash drive, along with MP3 and WMA.
Can I add a CD player?
Yes. A single slave CD player (CD-1) is offered.
What is the warranty?
2 years from Custom Autosound.
USA-850 specifications
- DigaDial selectable display (including working analog-style dial and digital RDS views)
- Bluetooth built in (streaming and hands-free calling)
- 300 watts peak power (75W x 4 peak)
- AM/FM stereo tuner with RDS
- 25 presets
- USB port for MP3/WMA/FLAC/WAV playback and phone charging
- Rear RCA auxiliary input
- Direct control for optional CD-1
- 6-volt RCA pre-outs plus dual subwoofer pre-outs
- Bass, midrange, and treble; DSP EQ (Flat, Classic, Pop, Rock)
- Front/rear fader and left/right balance; loudness
- Power antenna lead; digital clock
- 12V negative-ground; 2–8 ohm speakers
- Designed for original classic dash openings (vehicle-specific faceplate)
- Custom Autosound 2-year manufacturer warranty
USA-850 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-850 extras
Expect antenna, USB (playback and phone charge), Bluetooth microphone, optional CD-1 control, 6V front/rear RCA pre-outs, and dual subwoofer pre-outs. Use the rear RCA AUX for a wired player. Pick your DigaDial display style in the radio menu after power-up.
Suggested order for a classic Chevy
- 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 Chevy
- This radio is sold for the factory Chevy 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-850 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 Chevy USA-850
Will this fit my classic Chevy without cutting the dash?
It is built for the original radio opening used on classic Chevy 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-850 for streaming and hands-free calling. The DigaDial display also offers selectable classic dial and digital views.
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.
