The No.1 Website for Pro Audio
Old 1 week ago
Gear Head
Bart_UK's Avatar



  • Fully Functional Valve Opto-Compressor
  • Discrete Tube Class A Gain Stage
  • Side-Chain High Pass Filter
  • Threshold from -30dB to +10dB
  • Ratio from 1:1 to Limiter
  • Slow / Fast Attack Switch
  • Recovery from 50mS to 2S
  • +20dB Gain Make-Up
  • Stereo Coupling Option
  • 10 LED Gain Reduction Meter
  • Output Coupled with Custom HRK Transformer
  • J Electronics ECC83 Dual Triode Tube
  • On-Board Voltage 500 Rack PSU Filters
  • Direct Sale – Save on Distributors Fee!

The CP523V is a Tube based fully featured opto compressor with a Class A gain make-up stage.

The CP523V has separate controls for Threshold, compress Ratio, Recovery time and Output Gain.

The Attack time can be set with the switch to Fast or Slow. The Slow Attack is perfect for adding the edge to the drums or bass recording.

The Sidechain High Pass Filter removes the low frequency content from the processing greatly enhancing the capabilities of the CP523V for tracking and mastering.

The CP523V is very musical and easy to use. It can process any music material, instruments, vocal or recordings, delivering amazing results.

The Valve – Discrete Transistors Hybrid circuit is the result of a long development process. It produces rich Tube harmonics and tone while maintaining the noise on the extremely low level.

Create Amazing Results Easily!

The CP523V is easy to use even for engineers with less experience with dynamic processors.

Optocompressors are very versatile and produce smooth compression results. Any music material will benefit from the magic touch added by the CP523V.

The sidechain controls are simple and powerful providing the necessary tools for many demanding studio applications.

Add Harmonics to your Recordings or Tracks

The CP523V is suitable for recording as a part of the signal path. It will control the dynamics of the signal from the microphone, while enhancing the details and structure of the vocal or the instruments.

The CP523V can be used for tracking or mastering. Two units can be paired in stereo mode. The Slow Attack mode and the side-chain High Pass Filter can be used very creative way in mastering applications.

Stereo Mode

A pair of CP523V will work in a stereo mode. Two units can be coupled with a special link cable added for free if two CP523V units are purchased. If you purchasing second CP523V unit simply add the request for the link cable in the information section during the checkout. The cable will be added to your order for free.

The matched CP523V pair is also available as the separate item on this website.

More information about how to use CP523V in stereo mode can be found in the User Manual.

More info and HD sound samples:

Attached Thumbnails
CP523V | CLASS A VALVE OPTO COMPRESSOR - Bart HRK-cp523v-valve-opto-compressor-bart-hrk.jpg   CP523V | CLASS A VALVE OPTO COMPRESSOR - Bart HRK-cp523v-valve-opto-compressor-bart-hrk-fp.jpg   CP523V | CLASS A VALVE OPTO COMPRESSOR - Bart HRK-cp523v-matched-pair.jpg   CP523V | CLASS A VALVE OPTO COMPRESSOR - Bart HRK-cp523v-tube-circuit.jpg   CP523V | CLASS A VALVE OPTO COMPRESSOR - Bart HRK-cp523v-class-tube-optocompressor.jpg  

Old 3 hours ago
Lives for gear
vicenzajay's Avatar
Looking forward to user reviews of this....the price point for the specification set is phenomenal...
Post Reply

Welcome to the Gearslutz Pro Audio Community!

Registration benefits include:
  • The ability to reply to and create new discussions
  • Access to members-only giveaways & competitions
  • Interact with VIP industry experts in our guest Q&As
  • Access to members-only sub forum discussions
  • Access to members-only Chat Room
  • Get INSTANT ACCESS to the world's best private pro audio Classifieds for only USD $20/year
  • Promote your eBay auctions and listings for free
  • Remove this message!
You need an account to post a reply. Create a username and password below and an account will be created and your post entered.

Slide to join now Processing…
Thread Tools
Search this Thread
Search this Thread:

Advanced Search
Forum Jump
Forum Jump