| Bulk Pricing | ||
|---|---|---|
| QTY | Unit Price(Inlc. GST) | |
| 25+ | ₹245.27 ₹ 207.86 + 37.41 GST | |
| 50+ | ₹242.78 ₹ 205.75 + 37.03 GST | |
| 75+ | ₹239.04 ₹ 202.58 + 36.46 GST | |
| 100+ | ₹236.55 ₹ 200.47 + 36.08 GST | |
High-clarity 40x70mm rectangular speaker with 3W output. Ideal for space-constrained voice playback, robotics, and monitor audio upgrades.
UNO R3 Compatible Development Board - ATmega328P DIP Version with 16U2 USB ₹499.00 
Ethernet Shield for Arduino UNO MEGA W5500 upgraded W5100 for IoT ₹639.00 
ESP32-WROOM-32 NodeMCU 38-Pin Development Board ₹499.00 
ESP32 LOLIN32 Wireless Development Board WiFi Bluetooth Battery Charger ₹449.00 
USB 2.0 Type-A to Type-B Cable - 300mm Translucent Blue for Arduino UNO & Mega ₹45.00 The 4070 Rectangular Speaker provides the perfect balance of form factor and acoustic punch. This 4 Ohm, 3W driver is designed to deliver clear mid-range frequencies and crisp vocals in a slim, space-saving profile. At Probots, we understand that audio components are prone to damage during shipping; that’s why this product qualifies for Probots™ Secure-Transit , featuring shock-resistant packaging to ensure the delicate cones and solder tabs arrive in pristine condition.
The Probots Quality Advantage & Technical Specs Every batch of these drivers is Probots™ Lab Verified in our Bangalore facility to ensure the impedance and wattage ratings meet the technical datasheet standards, preventing clipping or damage to your amplifier. This full-range passive driver features a 40x70mm rectangular frame with integrated screw holes for easy mounting and dual solder pads for secure connectivity. With a 3 Watt RMS power rating, it is optimized for the human vocal range (200Hz - 15kHz), making it an ideal choice for HMI panels, kiosks, and DIY stereo setups when paired with a suitable amplifier like the PAM8403.
Unlock New Capabilities (Project Evolution) If you have mastered basic beep codes using a passive piezo buzzer, you are ready for this professional upgrade. Transitioning from a simple buzzer to this 4070 driver unlocks High-Definition Voice Synthesis and rich music playback, providing your project with a polished, commercial-grade sound. This evolution is considered an Intermediate effort level, as it requires moving beyond direct GPIO control to using an external audio amplifier module to drive the 3W load safely without damaging your microcontroller.
Virtual Technician & Wiring Guidance To ensure a successful build, please follow our Probots™ Logic-Safe guidelines: never connect this speaker directly to an Arduino or ESP32 GPIO pin, as the current draw will exceed the pin's limit. Wiring is straightforward: connect the Speaker (+) and (-) terminals to the corresponding L-OUT or R-OUT pads on your amplifier module, ensuring a stable 5V power source to prevent audio clipping. For the best acoustic performance, we recommend mounting the speaker within a small sealed enclosure or behind a grill to enhance the lower frequency response and protect the paper cone from physical impact.
Specifications:
Key Applications & Projects
Project Evolution
Virtual Technician & Wiring
⚠️ SAFETY WARNING: Never connect this speaker directly to an Arduino or ESP32 GPIO pin. Doing so will draw too much current and likely destroy your microcontroller. Always use an audio amplifier.
Wiring Guide:
Connect Speaker (+) to the L-OUT+ or R-OUT+ on your amplifier.
Connect Speaker (-) to the L-OUT- or R-OUT- on your amplifier.
Ensure your amplifier is powered by a stable 5V source to prevent audio clipping.
Package includes:
1 X 4070 - 4 Ohm 3W Rectangular Speaker Full Range Audio Driver for Arduino & DIY
Frequently Asked Questions (FAQ)
Probots sells every Electronics Part for your next Project. You can order 10,000+ Electronic Parts Online - Arduino, Raspberry Pi, NodeMCU Development Boards, Sensors, Motors, Motor Drivers, SMPS, Plastic Enclosures etc in India directly on probots.co.in
We delivery electronics components and parts throughout India using standard couriers like Bluedart, Delhivery & India Post.
For order related queries contact -
This item is covered by a warranty of 7 days from the date of delivery, against confirmed manufacturing defects only, as verified by Probots' own testing and investigation. In case of a confirmed defect, we will replace the item — a refund is issued only if a replacement can't be supplied (e.g. discontinued or out of stock). Transit damage or a wrong item received must be reported within 3 days of delivery.
If the product shows signs of misuse, tampering, physical damage, static discharge, liquid or fire damage, use of unapproved chemicals, or has been soldered or physically altered in any way.
China
Probots sells every Electronics Part for your next Project. You can order 10,000+ Electronic Parts Online - Arduino, Raspberry Pi, NodeMCU Development Boards, Sensors, Motors, Motor Drivers, SMPS, Plastic Enclosures etc in India directly on probots.co.in
We offer specialized services for Bulk, Wholesale & B2B Customers like discounted prices, additional shipping options, customised products, etc . Customer with large quantity & regular orders qualify for the specialised discounted rates.
We also offer dedicated sales team to assist you with the order process by providing sales quotations, PI, technical support for choosing products, etc.
Note: Business Orders are processed manually and usually take 1-3 days to process compared to placing the order directly on our website. Please plan your purchases accordingly.
Need Help?
For bulk enquiries contact us by -
Probots Electronics is highly regarded for its highly skilled team and knowledgeable staff who provide expert guidance to ensure customers select the right components for their technical projects. The business maintains a strong reputation for prompt service and reliable support, with many clients praising their quick response times and genuine commitment to customer satisfaction.
⭐⭐⭐⭐⭐ Excellent experience at this electronic equipment store! They have a good range of quality electronic products at reasonable prices. The staff is polite, knowledgeable, and helpful in choosing the right products. Great customer service and a smooth shopping experience. Highly recommended for anyone looking for electrical equipment! 👍
Best
A very great place for electronics Such a well maintained shop... Felt good shopping here
Nice
For new developments kit available and they will support till working, and I suggest this place strongly
This place has all the electronic parts students will ever need, staff is friendly and the place is organised.
Had a great experience at ProBots Koramangala! The staff was friendly, helpful, and professional. The overall environment was excellent, and I really appreciated the support and guidance provided throughout. Everything was well organized and smooth. Highly recommended for anyone looking for a good experience with robotics and technology! ⭐⭐⭐⭐⭐
It was a really nice experience! I was happy to find such a wide range of robotics kits for kids, suitable for different age groups and learning levels.
Excellent experience
Get better components in right place
Good stuff
Buyed them. But no bargain. Helpful staff.
if you have opted for store pickup, there is no clear communication, although the staff took accountability and did the needful
I had ordered online from Probots.co.in, and set Probots-KMG shop as self pickup. They messaged in whatsapp, once the order was packed and ready for pickup by rapido/porter. Good service.
Available all children school project spears parts like electronics
It was good experience
⭐⭐⭐⭐⭐ Excellent experience at this electronic equipment store! They have a good range of quality electronic products at reasonable prices. The staff is polite, knowledgeable, and helpful in choosing the right products. Great customer service and a smooth shopping experience. Highly recommended for anyone looking for electrical equipment! 👍
Best
A very great place for electronics Such a well maintained shop... Felt good shopping here
Nice
For new developments kit available and they will support till working, and I suggest this place strongly
This place has all the electronic parts students will ever need, staff is friendly and the place is organised.
Had a great experience at ProBots Koramangala! The staff was friendly, helpful, and professional. The overall environment was excellent, and I really appreciated the support and guidance provided throughout. Everything was well organized and smooth. Highly recommended for anyone looking for a good experience with robotics and technology! ⭐⭐⭐⭐⭐
It was a really nice experience! I was happy to find such a wide range of robotics kits for kids, suitable for different age groups and learning levels.
Excellent experience
Get better components in right place
Good stuff
Buyed them. But no bargain. Helpful staff.
if you have opted for store pickup, there is no clear communication, although the staff took accountability and did the needful
I had ordered online from Probots.co.in, and set Probots-KMG shop as self pickup. They messaged in whatsapp, once the order was packed and ready for pickup by rapido/porter. Good service.
Available all children school project spears parts like electronics
It was good experience
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