…if you’re like us and want to do all you can to render human musical performances with as much depth, dimension, detail and love as possible, give the Antelope clocks a listen…”


A new quality standard in Professional Master Clocks

The Antelope’s Isochrone OCX emerges as the new quality standard in professional master clocks. A master clock is the heart of the digital studio, essential to maintaining stability and preserving sonic integrity.

ocx features


Nonexistent jitter thanks to our Oven Controlled Discrete Transistor Crystal Oscillator


Just like the OCX-V or Trinity, Isochrone OCX can be locked to an atomic clock for perfect stability

Extended connectivity

8 Word Clock Outputs, 2 AES/EBU Outputs, 2 S/PDIF Outputs

OCX features


Jitter Management Module

Low jitter operation is critical in the modern studio. Antelope’s Jitter Management Module implemented in Isochrone OCX makes jitter essentially nonexistent.

Adaptive Loop Filtering is taken to the next level with a sophisticated DSP Based Multistage IIR filter, ensuring a jitter free, great sounding studio.

…only to find that after extended listening to the Antelope there is no way of going back.”

Oven-controlled Environment

Oscillator accuracy is compromised when exposed to temperature fluctuations. The Isochrone OCX addresses this completely with oven control. The oven’s temperature controlled environment allows unparalleled oscillator stability.

Atomic Clock input

The Isochrone OCX can be locked to the most accurate clock on Earth – the Atomic clock. A studio can truly achieve perfect stability with the power of Atomic Clock. The OCX, OCX-V and Trinity are the only Master Clocks capable of locking to this unprecedented technology.




    • In The Box

Isochrone OCX
Power cord
Owner’s manual
Warranty card

    • Dimensions

Width: 483 mm/19”
Height: 44 mm/1.75″
Depth: 175 mm/7″

    • Weight

2.3 kg/5.1 lb




User manual

OCX Master Clock | Data Sheets