ZK-PRO2 Bluetooth Preamp & Tone Board with aptX HD

Add Bluetooth and tone control to a DIY audio system with the ZK-PRO2 front-stage board. Connect a wireless or AUX audio source, then feed a compatible power amplifier for your custom stereo-and-subwoofer setup.

Features

• QCC3034 Bluetooth decoder and ES9023 digital-to-analogue converter.
• Listed Bluetooth codec support: SBC, AAC, aptX and aptX HD. Codec availability depends on the connected source device.
• Supplier-listed wireless range of up to 15 metres.
• Bluetooth and AUX inputs, with a 3.5mm audio input socket.
• Listed 2.1-channel configuration with two subwoofer output connections.
• Isolated power supply design intended to reduce interference and crosstalk.
• Six NE5532 operational amplifiers with DIP8 compatibility.

Specifications

• Model: ZK-PRO2.
• Supply: DC 12–26V.
• Listed working current: 28mA.
• Outputs: left/right stereo and two subwoofer connections via three XH2.54-3P terminals.
• Potentiometer: 50K dual, with 6mm splined shaft and 23.5mm spacing.
• Dimensions: 120 × 73 × 19.6mm.

Included

One front tone board and two 3P double-ended audio cables. The knob cap requires installation.

Before installation

This is a preamp and tone-control board, not a standalone speaker power amplifier. Use a compatible power amplifier and verify all connections against the model-specific manufacturer documentation. Use DC power only within the stated 12–26V range; do not connect AC power.