Product Description
The name is synonymous with the brand on so many levels. Triumph brand cars have become icons in the automotive world. Over the years, many collectors, as well as, car lovers have their favorite Triumph make and model but all are equally impressive. Naturally, you will discover that many Triumph collectors will want their vehicles to become an exact replica of how they rolled off of the assembly line so many years ago. When collectors enter that restored Triumph, the first thing they do is reach for the radio system. Without the time stamped radio unit in place, the restoration process would surely come to an end for the most avid collector. With that being said, the same attitude that draws collectors to the Triumph cars themselves, also catches collector’s attention when we consider the classic radios in full antique display set within the Triumph’s dashboard. One model has become the number one go to component for that classic look, and that model is none other than the 740 (USA).
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
What is the attraction to the original style radios? Perhaps even the most diehard collectors may not go as far as reproducing the antiquated 8 Track players. But for the astute collector, the USA-740 offers some appealing options. With this unit collectors can get that simplistic original but appealing styling with all of the desired modern amenities hidden out of plain sight.
Triumph cars are surely classic gems, and are becoming harder to find nowadays. Now collectors do not need to have the same struggles when it comes to replacing those original sound systems. The Triumph Custom Autosound USA-740 offers everything you will need and desire for your classic model. Regardless of the make, the USA-740 has a customized unit that is ready to install into your dashboard. The Triumph brand embodies a time in American history when owner took pride in their cars and owners were revered and envied. Over time roads became inundated with infinite makes and models of all kinds. The same reverence for the classic Triumph has resurfaced and just as attractive as these cars have become, so have the radio units for the astute collector. The Custom Autosound USA-740 Cord unit gives the car that added touch that makes these vehicles complete. Now the uniqueness of the outside meets up with the modern technology of the inside, and you too become complete with your Custom Autosound unit in place.
USA-740 IN DASH AM/FM for Triumph: Frequently Asked Questions
Will it fit my Triumph without cutting the dash?
This version is built for the Triumph and is made to fit the factory radio opening. Custom Autosound says its radios fit without altering or cutting the original dash.
What can I add to my USA-740 IN DASH AM/FM for Triumph order?
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 an antenna (Hideaway Antenna and Power Antenna).
How does the USA-740 handle phone audio and connections?
The AM/FM RDS tuner holds 25 presets (15 FM, 10 AM) and can auto-store the strongest stations. The USB port plays MP3, WMA, FLAC and WAV files from a flash drive.
What about older positive-ground electrical systems?
Why does the order ask about factory air?
Select Yes or No under Factory Air so we send the correct setup for your Triumph's dash.
Can I add a CD player or Bluetooth?
Check the CD options on this page, which include Single Slave CD.
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 classic Triumph
- 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 Triumph
- This radio is sold for the factory Triumph 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-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 — classic Triumph USA-740
Will this fit my classic Triumph without cutting the dash?
It is built for the original radio opening used on classic Triumph 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.
