BIK VK-R51 processor is a professional 5.1-channel digital karaoke processor designed to deliver powerful, clear, and immersive sound for home and commercial karaoke systems. Built with advanced digital signal processing technology, it enhances vocal clarity, reduces distortion, and creates a dynamic surround sound experience.

Professional echo and reverb control allow smooth vocal tuning while minimizing noise and distortion. With consistent performance and easy integration, the VK-R51 is suitable for home karaoke setups, commercial karaoke rooms, and entertainment spaces.

Simple operation and a user-friendly design make the VK-R51 easy to use, providing high-quality sound without complicated setup.

  • Condition: Brand New
  • Brand: BIK Japan
  • Model: VK-R51
  • Type: Digital Karaoke Processor 

Customer Service:

Once your item arrives, if you have questions about how your item functions or proper settings, please CONTACT US.

  • Frequency response: 20Hz - 20kHz
  • Total Harmonic Distortion (THD): 0.05% (1kHz)
  • Signal-to-noise ratio: 100dB
  • Crosstalk: 65dB (minimum)
  • Music Input Sensitivity: 30mV
  • Impedance: 50kΩ
  • Microphone Input Sensitivity: 30mV
  • Impedance: 50kΩ
  • Main Out (L/R): 2.0V
  • Center Out : 3.6V
  • Sub-Woofer Out: 3.6V
  • Surround Out (L/R): 3.6V
  • REC Out (L/R): 3.6V
  • Echo Control: 15 levels
  • Power supply voltage: 100-250V, 50/60Hz
  • Dimensions (WxHxD):18.98 x 1.77 x 7.87 inches
  • Weight: 4.85 lbs


  • Designed for professional 5.1 karaoke systems: Ideal for home karaoke setups, commercial sound systems, karaoke bars, lounges, and entertainment spaces seeking immersive surround sound.
  • Professional 5.1-channel sound processing: Creates vivid and well-defined surround sound, enhancing both karaoke singing and music listening experiences.
  • Wide frequency response: Accurately reproduces sound across the full frequency range, delivering realistic bass, clear midrange, and detailed treble.
  • Low total harmonic distortion (THD ≤ 0.05%): Ensures clean and clear audio output with minimal distortion, even at higher volume levels.
  • High signal-to-noise ratio: Effectively reduces background noise, providing clearer vocals and music playback.
  • Optimized channel separation: Improved crosstalk performance helps maintain clear separation between audio channels for better surround sound definition.
  • High input sensitivity: Supports 30 mV input sensitivity for both music and microphone signals, allowing easy connection with various audio sources.
  • Multiple professional audio outputs: Includes Main, Center, Subwoofer, Surround, and REC Out, enabling flexible system configuration.
  • Flexible Echo adjustment: Offers multi-step echo and key control, allowing fine-tuning of vocal effects to suit different singers.
  • Wide voltage compatibility: Designed for stable and safe operation across a broad power supply range.
  • Compact and lightweight design: Easy to install, integrate, and relocate within different audio setups


Please contact us immediately upon receiving the product for technical support, installation, tuning, maintenance, and any other assistance you may need

  • Home karaoke systems
  • Professional KTV and karaoke rooms
  • Bars, lounges, and commercial sound systems
  • Entertainment and music listening spaces
  • Users seeking a reliable 5.1-channel digital 


Package Includes:

  • BIK VK-R51 Digital Karaoke Processor
  • Power cable
  • Instruction manual

Shipping Details:

  • Dispatch Time: Ships within 1 business day
  • Carrier: UPS Ground (tracked & insured)
  • Signature Required: Yes (as buyer's request)
  • Transit Time: Typically 3–5 business days (USA)

International Shipping:

We offer global delivery through the eBay International Shipping Program. eBay handles customs, duties, and tracking.

Thank you for being a valued customer & Thanks for looking!