[manufelices]

In the JDsLabs web, there is the option to order the CMoy optimized for Grado headphones for free. I am not really sure if this means a different OAmp (like the CMoy RA1 in Ebay). Do you know more about this?

 

[jseaber]

Quote:

In the JDsLabs web, there is the option to order the CMoy optimized for Grado headphones for free. I am not really sure if this means a different OAmp (like the CMoy RA1 in Ebay). Do you know more about this?

 
The cMoyBB has a fixed gain. While a single gain will work with any headphones, it's better to adjust gain to a level that will suit the headphones you use. We make small adjustments to bass boost as well. You can find details below, with full technical documentation in our do-it-yourself guide:
 

Can the cMoyBB be customized? How?

Yes, the cMoyBB can be custom built upon request to match your headphones. To request free customization, please mention your headphones in the "Order Notes" during checkout.
 
Customization is strongly recommended for low impedance headphones (32 ohms and below), such as Grados and most in-ear-monitors (IEM's/earbuds). We adjust over 10 components to optimize the amplifier's gain, bass boost, input attenuation, and ground circuitry to best match your specific equipment. There is no need to contact us in advance. We will automatically make all beneficial adjustments based on your order notes. 
 
The cMoyBB is built by default to work well with any audio signal, including headphone output signals and line-level signals. If you plan to use a line-output adapter (LOD) cable, please mention this fact as well as your headphones during checkout. LODs produce a very strong signal which may require additional attenuation.
 
Please see our DIY modifications page for an explanation of all modifications.