---
product_id: 71066353
title: "Microlab Chairman B77BT Active Powered Bookshelf Speakers - Bluetooth Speakers- Heavy Bass - Desktop Speakers - Studio Monitor Speaker - Wooden Enclosure, 4” Sub-Woofer and 0.75” Tweeter - 64W RMS"
brand: "microlab"
price: "₨36785"
currency: LKR
in_stock: true
url: https://www.desertcart.lk/products/71066353-microlab-chairman-b77bt-active-powered-bookshelf-speakers-bluetooth-speakers-heavy
store_origin: LK
region: Sri Lanka
---

# Microlab Chairman B77BT Active Powered Bookshelf Speakers - Bluetooth Speakers- Heavy Bass - Desktop Speakers - Studio Monitor Speaker - Wooden Enclosure, 4” Sub-Woofer and 0.75” Tweeter - 64W RMS

**Brand:** microlab
**Price:** ₨36785
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** Microlab Chairman B77BT Active Powered Bookshelf Speakers - Bluetooth Speakers- Heavy Bass - Desktop Speakers - Studio Monitor Speaker - Wooden Enclosure, 4” Sub-Woofer and 0.75” Tweeter - 64W RMS by microlab
- **How much does it cost?** ₨36785 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/71066353-microlab-chairman-b77bt-active-powered-bookshelf-speakers-bluetooth-speakers-heavy)

## Best For

- microlab enthusiasts

## Why This Product

- Trusted microlab brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Description

Full description not available

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Power Source | Corded Electric |
| Speaker Maximum Output Power | 70 Watts |
| Subwoofer Connectivity Technology | Wireless |
| Connectivity Protocol | Bluetooth |
| Wireless Technology | Bluetooth |
| Connectivity Technology | Bluetooth |
| Audio Driver Type | Dynamic Driver |
| Item Weight | 5.4 Kilograms |
| Item Dimensions D x W x H | 8.7"D x 6"W x 10.5"H |
| Signal-to-Noise Ratio | 75 dB |
| Frequency Response | 200 Hz |
| Compatible Devices | Smartphone, Tablet, Laptop |
| Speaker Size | 4 Inches |
| Woofer Diameter | 4 Inches |
| Tweeter Diameter | 0.75 Inches |
| Is Waterproof | FALSE |
| Control Method | Remote |
| Audio Output Mode | Stereo |
| Mounting Type | Shelf Mount,Tabletop |
| Speaker Type | Subwoofer |
| Additional Features | Bass Boost |
| Recommended Uses For Product | For Music Players, For Studio Monitor Speakers, For Computers |
| Subwoofer Diameter | 4 Inches |

## Product Details

- **Brand:** Microlab
- **Speaker Maximum Output Power:** 70 Watts
- **Frequency Response:** 200 Hz
- **Connectivity Technology:** Bluetooth
- **Audio Output Mode:** Stereo

## Images

![Microlab Chairman B77BT Active Powered Bookshelf Speakers - Bluetooth Speakers- Heavy Bass - Desktop Speakers - Studio Monitor Speaker - Wooden Enclosure, 4” Sub-Woofer and 0.75” Tweeter - 64W RMS - Image 1](https://m.media-amazon.com/images/I/61fjR40PPgL.jpg)
![Microlab Chairman B77BT Active Powered Bookshelf Speakers - Bluetooth Speakers- Heavy Bass - Desktop Speakers - Studio Monitor Speaker - Wooden Enclosure, 4” Sub-Woofer and 0.75” Tweeter - 64W RMS - Image 2](https://m.media-amazon.com/images/I/61YqT4Me3YL.jpg)
![Microlab Chairman B77BT Active Powered Bookshelf Speakers - Bluetooth Speakers- Heavy Bass - Desktop Speakers - Studio Monitor Speaker - Wooden Enclosure, 4” Sub-Woofer and 0.75” Tweeter - 64W RMS - Image 3](https://m.media-amazon.com/images/I/61B+YAOUsBL.jpg)
![Microlab Chairman B77BT Active Powered Bookshelf Speakers - Bluetooth Speakers- Heavy Bass - Desktop Speakers - Studio Monitor Speaker - Wooden Enclosure, 4” Sub-Woofer and 0.75” Tweeter - 64W RMS - Image 4](https://m.media-amazon.com/images/I/61Jdx9XZRNL.jpg)
![Microlab Chairman B77BT Active Powered Bookshelf Speakers - Bluetooth Speakers- Heavy Bass - Desktop Speakers - Studio Monitor Speaker - Wooden Enclosure, 4” Sub-Woofer and 0.75” Tweeter - 64W RMS - Image 5](https://m.media-amazon.com/images/I/61m5x+WY4UL.jpg)

## Questions & Answers

**Q: how many watts total?**
A: These powered speakers are actually Bi Amped, so there is an amp in each speaker to drive the woofer and an amp in each cabinet to drive the tweeters. Each speaker has an 18 watt amp for the woofer and 14 watt amp for the tweeter, total wattage per speaker would be 32 watts for a total of 64 watts for the pair. Please let us know if we can answer any additional questions. Thanks for your interest in our products.

**Q: Can these connect to my laptop via a standard 3.5mm headphone jack?**
A: Then WHY doesn’t Microlab state this upfront????  Too hard to ad a single sentence to the description?  Why just say AUX??  That just means auxiliary!!!  As in, external.  My DESKTOP computer does not even have bluetooth, and its a 2 yr old dual processor 32g ram Lenovo d30 workstation!!!  But, like EVERY desktop on the market, going back 30 years, it DOES have a standard 3.5” audio out or line-out, in addition to 3.5” headphone out!!  So does my laptop; but I nor many of your possible customers, would use this at home/office, with my desktop!!  This is a growing trend with ‘puter interface et al descriptions;  let the 80 yr. old office janitor write them instead of a trained expert...

**Q: These speakers are powered.  how?  battery?  ac?  looking for 120 vac / 60 hz (us).  thanks!**
A: These speakers are AC 120 Volt powered, please let me know if you have any additional questions. Thanks for your interest in our products

**Q: ac power can be 220v? freevolts?**
A: Thanks very much for your interest , The Chairman B77BT are 120 Volt

---

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**Shop now:** [https://www.desertcart.lk/products/71066353-microlab-chairman-b77bt-active-powered-bookshelf-speakers-bluetooth-speakers-heavy](https://www.desertcart.lk/products/71066353-microlab-chairman-b77bt-active-powered-bookshelf-speakers-bluetooth-speakers-heavy)

---

*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-02-18*