RA-Twin II Bluetooth Adapter for Vintage Stereo – Receiver & Transmitter
$39.00
Add Bluetooth to any vintage stereo, amplifier or car stereo, or send your TV or stereo to Bluetooth headphones. Tiny but mighty, and set up in minutes.
- RX, TX and Mobile (microSD) modes
- Bluetooth 5.4, up to 10 m range
- Up to 10 hours per charge, USB-C
- Clear online manual in English & French
- 1-year warranty, Ottawa-based support
The Bluetooth adapter for vintage stereo that just works
Stream from your phone to any vintage receiver, amplifier or car stereo, or send your TV or stereo to Bluetooth headphones. The RA-Twin II is pocket-sized, rechargeable, set up in minutes, and backed by our team in Ottawa.
The short answer
The RA-Twin II is a pocket-sized Bluetooth 5.4 receiver and transmitter from Radique Audio. In RX mode it adds Bluetooth streaming to any vintage or modern stereo, amplifier or car stereo with a line-level input (AUX, tape, tuner or CD). In TX mode it sends sound from a non-Bluetooth source to Bluetooth headphones or speakers. In Mobile mode it plays MP3s from a microSD card. Up to 10 hours per charge over USB-C, a 1-year Radique Audio warranty, and a clear online manual in English and French.
One adapter, three ways to listen
Slide the switch to match the job. For RX or TX, ask one question: which device has Bluetooth?
RX · Receive Most popular
Phone to vintage stereo. Plug the RA-Twin II into your receiver, amplifier or car stereo and stream Spotify, Apple Music, podcasts or your own library from your phone, tablet or laptop.
TX · Transmit
Stereo or TV to Bluetooth headphones. Plug it into your stereo’s or TV’s audio output and listen on wireless headphones or a Bluetooth speaker, with nobody else disturbed.
Mobile · microSD
No phone needed. Load a microSD card with MP3s and it becomes a tiny music player for jogging, skiing or travel, with wired or Bluetooth headphones.
“I just received my RA-Twin II today… I can’t tell you enough how thrilled I am with this little but mighty product. I am using it to stream music from my laptop’s 400+ GB collection to my Marantz 2220b, also sourced through the wonderful people at Radique. You people rock — keep up the good work!”
Kevin · Google Review
Why the RA-Twin II
Made for vintage gear
The included RCA cable plugs into the inputs almost every classic receiver and amp already has. A ¼” TRS option connects through a headphone jack, and a 3.5 mm cable fits car stereos and AUX inputs.
Bluetooth 5.4
A modern, stable connection with up to 10 m (33 ft) of range in line of sight, and low latency for TV and video.
Up to 10 hours per charge
About 2 hours to charge over USB-C, and it switches itself off after 10 minutes without a source to save the battery.
A pocket MP3 player too
Cards up to 64 GB (about 15,000 songs), including most podcasts and audiobooks. Only 60 × 25 × 13 mm and 15 g.
A manual you can follow
A clear, step-by-step online manual in English and French, with a printable PDF and troubleshooting for every mode.
Real support, 1-year warranty
Questions go to our Ottawa team, not a call centre. And every RA-Twin II helps keep a vintage system playing instead of heading to landfill.
See it in action
Two short videos from our YouTube channel.
Easy setup with a vintage stereo
Step by step: connecting the RA-Twin II and streaming from your phone.
Unboxing and how it works
What’s in the box, and the adapter at work in both modes.
Upgrade to the Gold Series and save
The RA-Twin II comes with a basic cable. Our shielded Gold Series cables are a real step up in sound and shielding, and cost less when bundled.
Gold Series RX Bundle
The RA-Twin II plus our Gold Series 3.5 mm to dual RCA cable: the best way to stream from your phone to a stereo or amplifier. See the RX bundle
Gold Series TX Bundle
The RA-Twin II plus our Gold Series ¼” to ⅛” TRS cable, to send a vintage amp’s headphone output to Bluetooth headphones or speakers. See the TX bundle
Keep it charged at your stereo: the RA-USB
A huge range of vintage receivers and amplifiers have AC outlets on the back panel. Plug our RA-USB multi-port charger into one and your RA-Twin II stays charged right where it lives, with no extra wall outlet and no stray adapter.
With three USB-A ports and a 20 W USB-C port (50 W total), it charges your phone, tablet or earbuds at the same time. It’s also a compact travel charger.
What’s in the box & specifications
In the box
- RA-Twin II Bluetooth receiver / transmitter
- Basic dual RCA to 3.5 mm cable
- USB-C charging cable
- Insert card with a QR code to this page, where you’ll find the manual and our videos
Want the Gold Series cable instead? The RX bundle and TX bundle save you money over buying separately.
| RA-Twin II | |
|---|---|
| Bluetooth | V5.4 EDR · A2DP, HSP, AVRCP |
| Range | Up to 10 m (33 ft), line of sight |
| Modes | RX (receive) · TX (transmit) · Mobile (microSD) |
| Battery | Up to 10 h · about 2 h to charge (USB-C, 5 V / 1 A) |
| microSD | Up to 64 GB · MP3 |
| Size | 60 × 25 × 13 mm (2.36 × 0.98 × 0.51 in) |
| Weight | 15 g (0.53 oz) |
| Warranty | 1 year, Radique Audio |
RA-Twin II questions
Will the RA-Twin II work with my vintage receiver or amplifier?
Yes. Any stereo with a line-level input works: AUX, tape, tuner, CD or video. Plug the included RCA to 3.5 mm cable into that input, set the RA-Twin II to RX mode and pair your phone. Don’t use the phono input; it’s designed for a turntable’s much smaller signal.
Can I use it in my car?
Yes. In RX mode, connect it to your car stereo’s 3.5 mm AUX input with a 3.5 mm to 3.5 mm cable (not included) and stream from your phone. The built-in microphone handles hands-free calls; mount the RA-Twin II near your mouth, on the dashboard or sun visor.
Can I listen to my TV or stereo on Bluetooth headphones?
Yes, in TX mode. Connect the RA-Twin II to the TV’s or stereo’s audio output (not an input), put your headphones in pairing mode, and it pairs automatically. For a vintage amp’s headphone jack, use a ¼” to ⅛” TRS cable such as our Gold Series.
How far does it reach, and how long does the battery last?
Up to 10 m (33 ft) with line of sight, and up to 10 hours per charge. A full charge over USB-C takes about 2 hours.
Can I keep the RA-Twin II charged at my stereo?
Yes. Many vintage receivers and amplifiers have AC outlets on the back panel. Plug our RA-USB multi-port charger into one and charge the RA-Twin II over USB-C right at the stereo, with ports to spare for your phone.
Why does my amp make noise after I stop streaming?
After 10 minutes without a connection the RA-Twin II switches itself off, and if the amp is still on and set to that input, the basic cable can act like an antenna. Turn the amp off or switch it to another source when you’re done, or upgrade to our Gold Series 3.5 mm to dual RCA cable, whose heavier shielding stops the noise.
Is there a manual in French?
Do you ship the RA-Twin II to the United States?
Yes. On Radique Audio products we add the US import duties and fees at checkout and prepay them for you, so there’s nothing to pay at delivery.
What warranty does it have?
A 1-year Radique Audio warranty against defects, with support from our team in Ottawa. See the warranty FAQ.
Set up in minutes, supported for years
Everything you need to get going is in the manual, and our team is a message away.
| Weight | 0.2 lbs |
|---|---|
| Dimensions | 10 × 8 × 1 in |
Frequently bought together
RA-Twin II Bluetooth Adapter for Vintage Stereo – Receiver & Transmitter
Add Bluetooth to any vintage stereo, amplifier or car stereo, or send your TV or stereo to Bluetooth headphones. Tiny but mighty, and set up in minutes.
- RX, TX and Mobile (microSD) modes
- Bluetooth 5.4, up to 10 m range
- Up to 10 hours per charge, USB-C
- Clear online manual in English & French
- 1-year warranty, Ottawa-based support
RA-USB Multi-Port USB Fast Charger – 50W, USB-C PD & QC 3.0
Tiny but mighty: charge four devices at once from one outlet, whether that's the wall or the accessory outlet on the back of your vintage amp.
- 50 W total: 20 W USB-C Power Delivery + three USB-A ports
- Quick Charge 3.0 for compatible Android phones
- Keeps your RA-Twin II charged right at the stereo
- Overvoltage, overcurrent, short-circuit and heat protection
- 1-year warranty, Ottawa-based support
Gold Series 3.5mm to Dual RCA Cable – Radique Audio, Shielded
A 3.5 mm TRS male to dual RCA male cable, 1.2 metres long and 7 mm in diameter. Two hundred and sixty-two tinned copper strands sit inside braided and foil shielding, with an integrated degaussing ring and a reinforced splitter. Gold-plated connectors, PE insulation and a gold cotton mesh jacket. Designed and tested in-house.
Gold Series 1/4 to 1/8 TRS Cable – Shielded by Radique Audio
One metre of 1/4-inch to 1/8-inch TRS, stereo at both ends, so no adapter sits in the signal path. 262 tinned copper strands inside a 128-strand braided copper shield, an aluminium foil layer, and dual degaussing rings for magnetic noise. PE insulation under a 7mm gold cotton mesh jacket that routes without kinking. Built by Radique Audio.
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RA-Twin II Gold Series TX Bundle
The RA-Twin II plus our shielded Gold Series ¼" to ⅛" TRS cable: send your vintage amp's headphone output to Bluetooth headphones or a speaker, for less than buying the two separately.
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- Perfect for late-night listening
- Clear online manual in English & French
- 1-year warranty, Ottawa-based support
RA-Twin II Gold Series RX Bundle
The RA-Twin II plus our shielded Gold Series 3.5 mm to dual RCA cable: stream from your phone to any vintage receiver, amplifier or powered speakers, for less than buying the two separately.
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- Clear online manual in English & French
- 1-year warranty, Ottawa-based support
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