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Rear Input PCB Board for HK-4000 Professional Power Amplifier

Rear Input PCB Board for HK-4000 Professional Power Amplifier

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Product Details & Features

Genuine high-quality replacement Rear Input PCB specifically designed for the HK-4000 Professional Power Amplifier. This board features dual XLR inputs and outputs, sensitivity selection, and integrated crossover/mode switches to restore your amplifier's full functionality.

Key Features:

  • Direct Fit: Engineered specifically for the HK-4000 model for seamless installation.

  • Professional Connectivity: Features 2 Female XLR Inputs (Push-lock) and 2 Male XLR Link Outputs.

  • Integrated Controls: Includes sliding switches for Input Sensitivity (0.775V/1.0V/1.44V), Ground/Lift, Stereo/Parallel/Bridge modes, and High/Low Pass Filters.

  • Durable Build: High-grade PCB with premium capacitors and gold-plated pins for optimal signal integrity and low noise.

  • Plug-and-Play: Comes with multi-pin header connectors (VOL-A, VOL-B, CH1, CH2) for easy internal wiring.

Technical Specifications

Feature Details
Compatible Model HK-4000 
Input Ports 2 x Balanced XLR Female
Output Ports 2 x Balanced XLR Male (Link)
Selectable Sensitivity $0.775V$ / $1.0V$ / $1.44V$
Filter Modes Full / High Pass ($30Hz$ or $110Hz$) / Low Pass
Operating Modes Stereo, Parallel, Bridge

Fast Delivery

🚚 Fast & Reliable Delivery Across India

We strive to ensure a smooth and quick delivery experience for all our customers.


  • Same-Day Dispatch: All orders are usually dispatched on the same day, with daily cut-off around 4:00 PM IST.

  • Delivery Time: You can expect your order to reach you within 4–5 working days, depending on your location.

  • Pan India Shipping: We deliver across all cities and villages in India, so no matter where you are, we’ve got you covered.

  • Trusted Courier Partners: Your orders are shipped through reliable logistics partners like DTDC and Delhivery to ensure safe and timely delivery.

💡 Whether it’s a metro city or a remote village, you don’t need to worry — we make sure your order reaches you securely.

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