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AMAZON
Bluetooth Audio Amplifier Board, ZK-TB21 2.1CH 50W x 2 +100W Subwoofer Power Amp with Treble and Bass Control, Bluetooth5.0 and AUX Inputs, Stereo Digital AMP for DIY Home Speakers
₹2,449
₹4,999
51% OFF
All-Time Low
12-Month Low
2%
Updated 20th Jul 2026, 02:45 AM
Buy Now
Price Analysis & Buying Guide
68 / 100
Good Deal
Confidence: 100%
Avg Discount
28/28
Recent Discount
0.1/22
Historical Pos.
16.1/20
Low Proximity
20/20
Trend Bonus
4/10
Avg Price
₹5,226
6M Avg
₹2,451
All-Time Low
₹2,499
All-Time High
₹13,767
vs MRP
↓51%
Price Benchmarks
Lowest Ever
₹2,449
26th Aug 2025
Highest Ever
₹13,767
5th Dec 2024
Average Price
₹5,205
289 data points
3-Month Low
₹2,449
23rd Apr 2026
6-Month Low
₹2,449
27th Jan 2026
12-Month Low
₹2,449
26th Aug 2025
As per price history, Bluetooth Audio Amplifier Board, ZK-TB21 2.1CH 50W x 2 +100W Subwoofer Power Amp with Treble and Bass Control, Bluetooth5.0 and AUX Inputs, Stereo Digital AMP for DIY Home Speakers's lowest price is ₹2,499. The average price is ₹5,226. Highest ever price is ₹13,767. Along with deals, coupons & discounts, you can get it at ₹2,449. Read our Pricing Disclosure
Similar Products
Product Details
| Product Code | B08G1NZF3Y |
|---|---|
| Market Place | amazon.in |
| Store | Amazon |
| Rating | 4.2 (392 ratings) |
| Category | Amplifiers |
| Manufacturer | DideaECO |
| Model Number | ZK-TB21 |
| Model Number | ZK-TB21 |
| Dimensions | 11.18 x 6.99 x 1.98 cm; 168 g |
| Country of Origin | USA |
Frequently Asked Questions
What is the lowest price ever for Bluetooth Audio Amplifier Board ZK-TB21 21CH 50W x 2 100W Subwoofer Power Amp with Treble and Bass Control Bluetooth50 and AUX Inputs Stereo Digital AMP for DIY Home Speakers?
▶
The all-time lowest price for Bluetooth Audio Amplifier Board ZK-TB21 21CH 50W x 2 100W Subwoofer Power Amp with Treble and Bass Control Bluetooth50 and AUX Inputs Stereo Digital AMP for DIY Home Speakers was ₹2,449 recorded on 26th Aug 2025. The current price matches or is below the all-time low!
What was the highest price for this product?
▶
The highest recorded price for Bluetooth Audio Amplifier Board ZK-TB21 21CH 50W x 2 100W Subwoofer Power Amp with Treble and Bass Control Bluetooth50 and AUX Inputs Stereo Digital AMP for DIY Home Speakers was ₹13,767 on 5th Dec 2024. Right now you save 82.2% compared to the peak price.
What is the average selling price?
▶
Based on 289 data points, the average price of Bluetooth Audio Amplifier Board ZK-TB21 21CH 50W x 2 100W Subwoofer Power Amp with Treble and Bass Control Bluetooth50 and AUX Inputs Stereo Digital AMP for DIY Home Speakers is ₹5,205. The current price is 52.9% below average — a good indicator for buying.
What is the 3-month lowest price?
▶
In the last 3 months, the lowest price was ₹2,449 on 23rd Apr 2026.
What is the 6-month lowest price?
▶
The 6-month lowest price for Bluetooth Audio Amplifier Board ZK-TB21 21CH 50W x 2 100W Subwoofer Power Amp with Treble and Bass Control Bluetooth50 and AUX Inputs Stereo Digital AMP for DIY Home Speakers was ₹2,449 on 27th Jan 2026.
Is the price going up or down?
▶
The current price trend for Bluetooth Audio Amplifier Board ZK-TB21 21CH 50W x 2 100W Subwoofer Power Amp with Treble and Bass Control Bluetooth50 and AUX Inputs Stereo Digital AMP for DIY Home Speakers is Stable. Prices have remained relatively stable. There's no immediate urgency, but don't expect a big drop either. It has been 328 days since the last recorded low price.
Is this the cheapest it has ever been?
▶
Yes! According to our price tracking data, the current price of Bluetooth Audio Amplifier Board ZK-TB21 21CH 50W x 2 100W Subwoofer Power Amp with Treble and Bass Control Bluetooth50 and AUX Inputs Stereo Digital AMP for DIY Home Speakers matches or is at its all-time lowest price. This is a rare opportunity — we strongly recommend buying now if you've been considering this product.
How does the current price compare to the average?
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The current price is 53.1% below the average price. This is a significant discount compared to what this product usually sells for. A great time to consider purchasing.
How much discount is available from MRP?
▶
You're currently saving 51% off the MRP (Maximum Retail Price). That's a massive discount! This is well below the listed retail price.
Should I buy this product now?
▶
Good deal. Score: 68/100 (Grade B) — the price is favorable and worth buying if you need it. There's still room for improvement, but this is better than most days. Price trend is currently stable. Currently 53.1% below average price.
What does the Deal Score mean?
▶
The Deal Score is a composite rating from 0 to 100 calculated by our algorithm. It considers five factors: Average Discount (how far below the long-term average), Recent Discount (short-term price performance), Historical Position (where the price sits in its all-time range), Low Proximity (closeness to the all-time low), and Trend Bonus (whether prices are falling). Grades are: S (90-100, Exceptional), A (75-89, Great), B (60-74, Good), C (45-59, Fair), D (30-44, Below Average), F (0-29, Not a Deal). This product currently has a score of 68 with 100% confidence.
Where can I buy this product?
▶
Bluetooth Audio Amplifier Board ZK-TB21 21CH 50W x 2 100W Subwoofer Power Amp with Treble and Bass Control Bluetooth50 and AUX Inputs Stereo Digital AMP for DIY Home Speakers is available on Amazon (amazon.in). Click the Buy Now button above to visit the product page directly. We recommend checking for available coupons and bank offers on the store page for additional savings.