2.1CH Class D Car Amplifier — 135W x 2 + 400W Mono @ 2Ω, TDA8954 Half-Bridge, HPF/LPF/Bass Boost (SA-PY21)

Full-range and subwoofer power in one compact amplifier. The SA-PY21 is a 2.1-channel Class D car amplifier built around the TDA8954 half-bridge IC — delivering 135W x 2 full-range channels plus 400W mono subwoofer output at 2 ohms, or 90W x 2 plus 260W mono at 4 ohms. Built-in HPF (50–250Hz), LPF (30–200Hz), and bass boost crossover controls let you tune the system for any speaker configuration. Compatible with underseat passive subwoofers (6", 6x9", 8", 10"), ported tube subwoofers, spare tire subwoofers, and aluminum case subwoofers. Backed by a 1-year warranty.

Key Features

• 135W x 2 + 400W mono @ 2 ohms — High-output 2.1CH amplification for full-range speakers and subwoofer in a single unit.
• TDA8954 half-bridge IC — Premium TDA8954 chip delivers efficient, high-quality Class D amplification for both full-range and subwoofer channels.
• Built-in HPF & LPF crossovers — HPF (50–250Hz) and LPF (30–200Hz) crossover controls for precise frequency management.
• Bass boost — Adjustable bass boost for enhanced low-frequency output.
• Broad subwoofer compatibility — Powers 6–12" underseat, ported, spare tire, and aluminum case passive subwoofers.
• 10–22kHz frequency response — Wide frequency response for accurate full-range and subwoofer reproduction.
• 40A fuse protection — Built-in 40A fuse for system protection.

Specifications

• Model: SA-PY21
• Type: Class D 2.1CH (full-range + mono)
• Chip: TDA8954 half-bridge IC
• RMS @ 2Ω: 135W x 2CH + 400W x 1CH
• RMS @ 4Ω: 90W x 2CH + 260W x 1CH
• HPF: 50–250Hz
• LPF: 30–200Hz
• Frequency response: 10–22kHz
• SNR: 91–100dB
• Sensitivity: 100mA–10V
• Fuse: 40A
• Voltage: 14.4V
• Warranty: 1 year

SA-PY21. 2.1CH Class D. TDA8954. 135W x 2 + 400W mono @ 2Ω. HPF/LPF/bass boost. 10–22kHz. 40A fuse. 14.4V.