Grimm Audio CC2 - ultra-low jitter Audio Master- and Wordclock

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What is the Grimm Audio CC2?

 

The Grimm Audio CC2 is a standalone word clock generator for compatible digital audio equipment. It provides two BNC word clock outputs and can serve as the master timing reference for converters, audio interfaces and digital mixing systems with suitable external word clock inputs.

 

What jitter performance does Grimm Audio specify for the CC2?

 

Grimm Audio specifies internal intrinsic clock jitter below 0.6 ps RMS for jitter frequencies above 10 Hz. This describes the clock generator’s intrinsic timing performance, not a guaranteed jitter value inside every connected converter or a guaranteed audible improvement in every system.

 

Which sample rates does the Grimm Audio CC2 support?

 

The CC2 supports 44.1, 48, 88.2, 96, 176.4 and 192 kHz. The front-panel switches select a 44.1 or 48 kHz base rate and a multiplication factor of 1, 2 or 4.

 

Can the two CC2 outputs run at different sample rates?

 

No. Both BNC outputs follow the same sample-rate selection. The CC2 does not provide two independently selectable sample-rate groups.

 

Which equipment can be synchronized with the Grimm Audio CC2?

 

The CC2 can synchronize compatible AD/DA converters, audio interfaces, digital mixers and other devices with an external word clock input. Check that the receiving device supports the selected sample rate and configure it to use external word clock. A BNC connector alone does not establish compatibility.

 

Can the Grimm Audio CC2 lock to an external clock?

 

No. The CC2 operates as a master clock and has no external clock input or slave mode. It generates the timing reference itself rather than following another clock source.

 

Does the CC2 provide audio connections or a 10 MHz reference output?

 

No. Its BNC outputs carry word clock at the selected audio sample rate. They do not carry an audio signal and are not 10 MHz reference-clock outputs. Equipment that accepts only a 10 MHz reference cannot be connected directly to the CC2 as a compatible clock source.

 

How should devices be connected to the Grimm Audio CC2?

 

Grimm Audio recommends a star connection, with each CC2 output connected directly to one receiving device using a suitable 75 Ω BNC coaxial cable. Set each receiving device to external word clock and follow its termination requirements. Avoid BNC T-piece daisy chains where possible.

 

Why does the CC2 have switchable output impedance?

 

Each BNC output can be set to 75 Ω or a low-impedance mode specified as 25 Ω. These settings help accommodate differences in receiving devices’ termination and signal-level requirements. Use the setting appropriate to the connected equipment and follow the manufacturer’s instructions.

 

Is the Grimm Audio CC2 suitable for studio and hi-fi systems?

 

Yes, provided the connected equipment accepts compatible external word clock. The CC2 can supply a common timing reference in recording, mastering, live-sound and suitable hi-fi systems. It is not an audio processor, and using an external clock should not be treated as a guaranteed sound-quality improvement for every device.

 

Is the Grimm Audio CC2 a desktop or rackmount unit?

 

Grimm Audio lists a compact standalone version and a version with a 19-inch rack front. Confirm the supplied version and mounting configuration before ordering, as dimensions and included mounting hardware should not be assumed to be identical.

 

What mains power does the Grimm Audio CC2 require?

 

The CC2 uses an internal linear power supply configured for the appropriate mains voltage. The manual describes factory-set 115 V or 230 V versions and specifies 5 W power consumption. Check the voltage marking beside the mains inlet before connecting the unit; it should not be assumed to have a universal auto-ranging power supply.