Feature Highlights: 1. Passive Tone Control Board – This board adjusts the high and low frequencies of your audio signal before sending it to the amplifier. It works without needing any external power. 2. Simple Signal Tuning – Uses resistor-capacitor components to filter and shape the sound. You can easily turn the knobs to boost or cut bass and treble. 3. Dual-Channel Adjustment – Includes separate controls for volume, bass, and treble on both left and right channels. 4. Compact & Ready to Install – Knobs are spaced 22.5mm apart for easy mounting. The board comes as a bare PCB for DIY integration. 5. Universal Compatibility – Works with most amplifier setups. Ideal for audio enthusiasts who want to fine-tune their sound without extra power. Product Details: This passive tone board lets you adjust the highs and lows of your audio signal before it reaches the amplifier. It doesn’t require a power supply—just connect it inline with your audio source. The circuit uses reliable resistor-capacitor filtering to deliver clear, customizable sound. Installation is straightforward, with clearly labeled connections and standard 2.54-3P sockets. Perfect for upgrading your stereo, DIY audio projects, or custom hi-fi systems. Specifications: - Product Name: Passive Tone Control Board (Bare Board) - Adjustable Controls: Master Volume, Bass, Treble - Channels: 2 (Stereo) - Knob Spacing: 22.5mm - Socket Type: 2.54-3P - Color: Random (cannot be specified) - Material: Plastic + Metal - Package Includes: 1 × Passive Tone Board Only the items listed above are included. Note: Slight color variations may occur due to lighting or screen settings. Dimensions may vary within +/- 1–3cm.