ZY-2.1 is a Bluetooth 5.1 2.1 channel amplifier board for DIY speaker systems. It outputs up to 50W × 2 (left/right) and 100W (subwoofer) with DC 12–24V input. Supports Bluetooth and AUX input for wireless or wired audio.Includes independent treble, bass, subwoofer, and master volume control. Compact layout with labeled interfaces for quick installation in desktop speakers and home audio builds. ZY-2.1 Amplifier Product Parameters:Product Name: 2.1 Channel Bluetooth Audio Amplifier ModuleProduct Model: ZY-2.1Bluetooth Version: 5.1Bluetooth Range: Up to 10 meters (open space)Input Method: AUX BluetoothAmplifier Chip: TPA3116D2Power Supply: DC 12–24V (5A or above recommended)Compatible Speakers: 20–100W, 4-8ΩOutput Power:Left/Right Channel: Up to 50W × 2Subwoofer: Up to 100WProtection: Over-voltage, Under-voltage, Overheat, Short CircuitProduct Size: 93 × 90 × 22 mm（3.66 × 3.54 × 0.87 in）Weight: Approx 6.53 oz (including packaging) ZY-2.1 Package List1 × Audio Amplifier Module2 × Acrylic Case Panels5 × Control Knobs4 × Brass Standoffs4 × Brass Nuts8 × Screws1 × ScrewdriverEasy to installAll interface functions are clearly labeled on the top panel, making installation and wiring straightforward.Independent Treble & Bass ControlSupports independent adjustment of treble, bass, subwoofer, and master volume for flexible sound tuning.Power Output Comparison Table(@ZY2.1)Input VoltageR&L Channel OutputSubwoofer OutputSpeaker ImpedanceOutput PowerSpeaker ImpedanceOutput Power12V8Ω15W8Ω20W4Ω30W4Ω35W19V8Ω20W8Ω35W4Ω40W4Ω60W24V8Ω30W8Ω50W4Ω50W4Ω100W
