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R4 DIY Bluetooth Radio ( Separate )

R4 DIY Bluetooth Radio ( Separate )

Regular price $139.99 USD
Regular price Sale price $139.99 USD
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Shipping calculated at checkout.

In the Box

- 2” Full Range Driver x2
- Wood boards
- PCB,Battery,Antenna,Speaker cable
- Knobs,Foot Pad,Screws, Nuts, Screw washers
- USB TypeA-C charging cable


CELIA & PERAH will ship within 1~2 working days after receiving your order (excluding Saturdays, Sundays, and national holidays). The details are as follows:

◆ The actual delivery time is mainly based on the delivery progress of the logistics company. Customers can check the delivery progress according to the delivery order number on the logistics system.
◆ In the following cases, the delivery time will be postponed
> The recipient information is incomplete, the recipient address is changed, or the recipient cannot receive the goods.
> In the event of natural disasters such as typhoons and earthquakes, public works, and festivals, etc.


48mm 2” 8W x2

Amplifier 16W RMS Max Output 93db @ 1m Frequency Range68~20000 Hz

Aux in : Stereo / 1VP / 3.5mm
Bluetooth 4.0 + EDR
FM radio : 88-108 MHz
USB Disk : MP3 play in sequence

Battery report
Charging : DC 5V2A (USB type C: regular phone chargers )
Charging Time : 2.5 Hours
Playback time : 8 Hours/ 80% Volume

Speaker: 7.5(W)x 8.4(D) x 17.2(H)
Main Box: 12.5(W) x 11(D) x 5(H)

935 g

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R4 DIY Bluetooth Radio

Design Concept

Gone are the days when speakers are just built to amplify your music. CELIA & PERAH R3/R4 are Bluetooth speakers which you can personalize its look to suit your music style, and the customizable design allows you to understand the acoustic magic behind the superb sound quality when you build it up.

Easy and Fun

R3&R4 enable consumers to enjoy doing-it-yourself fun by precise laser cutting and strict quality control on each assembly part.
Less-than-an-hour work makes consumers get something more than a radio, this is what we want to deliver to the customers~ amazing audio performance comes after the efforts and persistence in every step of product making

Freestyle your Speaker

Creating your own stylish speaker is easier than ever. All you need is some imagination! You can even spray paint the speaker with any color or images you want. CELIA & PERAH R3/R4 can fit in your room whether your style calls for a plain and minimalist design or bright and bold colors.

Smart design For all your needs

You can use Bluetooth to connect directly with mobile devices, or store your favorite albums and frequently listened background music on the USB drive, and play them in a loop through the R3 or R4. They can also connect your various devices with 3.5mm Aux in audio cables. The radio function allows you to reminisce lithe old times. The current battery level will be reported automatically when turned on.The charging will complete in 2.5 hrs using USB type C connector and sustain 8 hours at a time.

Magic behind our sound

The sound quality of a speaker is the comprehensive result of many elements—cabinet, drivers, algorithm, design, —and every detail matters in the final performance. We spent more than two years designing and optimizing CELIA & PERAH R3/R4 so that they can bring out the best of your music.

Sweet Spot : Music without distortion

CELIA & PERAH R3/R4 utilizes the energy-efficient 30W Class-D Amplifier  to reproduce input audio signals. Its lower power dissipation produces less heat and saves up space on the circuit board. Moreover, we carefully controlled the power output, allowing the amplifier to deliver no more than 16W, our so-called Sweet Spot; therefore, the sounds that our speaker produces will have a lot less distortion.


Squeeze Box : Fortified Low-frequency Performance

To create an extraordinary small speaker, not only did we select the most suitable material to build up the speaker cabinet, but we also utilized a carefully-calculated port tube design and algorithm to enhance the bass performance, so that we can improve low-end frequency response without increasing the cabinet size.

Live Concert : Immersive sound experience

Through 3D algorithms, we carefully calculated time delays and minor volume differences between the two drivers to create a surround sound. When listening to CELIA & PERAH R3/R4, you will feel like the two drivers are much further than they actually are, giving you perfect immersive music-listening and movie-watching experiences.