Features：
300 Watts x2 Power Output: Provided by the TI TPA3255 chip which features an advanced feedback design and proprietary high-speed gate driver error correction. In addition to excellent audio performance, TPA3255 achieves both high power efficiency and very low power stage idle losses below 2.5W.
High Efficiency: A significant upgrade from the BT20A amplifier. There're two plug-ins NE5532 Op-Amps can be replaced by MUSES02/OPA26041P/OPA2134PA Op-Amps etc. To create a different sound quality. SNR≥108dB; THD≤0.005%.
Upgraded Bluetooth 5.0 connectivity: By pressing and holding the volume control for five seconds, the Bluetooth pair can be cleared. In addition, it has a Bluetooth memory function, so it can be easily paired the next time. It also receives an alert tone.
Sound Control: With its unique design, the BT20A Pro amplifier for home audio has a wide range of bass and treble controls. Alternatively, you can turn the treble and bass effects to a middle point to listen to the original sound without effects.
Specifications：
Model：BT20A PRO
Output Power：300Wx2 @4Ω
Terminating Impedance：2-8Ω
Input Mode：Bluetooth + RCA
Output Mode：Passive Speakers + Pre-out
Frequency Range：20Hz-20kHz(±1.2dB)
THD ≤0.005%
SNR ≥108dB
Chip Set：TPA3255
Bluetooth Transmission Distance：Up to 50Ft
Bluetooth Transmission Format：SBC/AAC
Device Dimension：5x5x1 inches
DC Input Range：24-48V
Power Supply：32V 5A
About "Opened box":
🔥 Like New & Fully Certified! Premium Refurbished Fosi Audio BT20A- Backed by eBay’s 1-Year Warranty
🔥You’ve found a top-tier refurbished gem! This BT20A isn’t just "Used" — it’s been professionally inspected, repaired, and tested to meet strict performance standards under eBay’s Certified Refurbished Program. Rest easy knowing it looks and works like new!
✔️ Rigorously Renewed: Factory defects fixed; scratches, dents, or flaws professionally addressed.
✔️ Deep-Tested & Sanitized: Every function verified (battery, ports, sensors, etc.) + hygienic cleaning.
✔️ Warranty Backed: Includes eBay’s 1-Year Warranty — your guarantee against defects.
✔️ Ready to Wow: Ships in eco-friendly packaging with all essential accessories (charger, manual, etc.).
💎 What’s Included?
BT20A Pro Power Amplifier x 1
Bluetooth Antenna x 1
48V 5A Power Adapter x 1
AC Cord x 1
User’s Manual x 1
🛡️ Shop Confidently Under eBay’s Refurbished Promise:
30-day money-back guarantee — no questions asked.
Free return shipping if item doesn’t match description.
Authenticity verified — zero knockoffs.
⏰ Limited Stock! Save 30% vs. new — grab this renewed premium device before it’s gone!
→ Click “Add to Cart” Now → Enjoy Renewed Luxury!
✨ Key Selling Points Aligned with eBay Policy:
Warranty Highlight: eBay’s 1-year coverage is a HUGE trust-builder vs. third-party sellers.
Condition Transparency: Uses terms like “professionally inspected” and “like new” without exaggerating.
Returns & Guarantees: Features eBay’s 30-day return policy prominently.
Compliance: Avoids words like “brand new” or “unused” — focuses on renewed quality.
This description balances excitement with honesty, targets value-driven buyers, and leverages eBay’s program trust — proven to boost conversions! 🚀
On 23/10/2025 at 14:51:04 AEDT, seller added the following information: