I have Volex 17604 purchased three years ago, and they do not have brass blades.
Honestly, though, I'd recommend listening to them and either using them or not based on what you hear. Trying to figure out the details of old versus new, and any possible sonic differences betwen the two is a waste of time when considering their cost.
Honestly, though, I'd recommend listening to them and either using them or not based on what you hear. Trying to figure out the details of old versus new, and any possible sonic differences betwen the two is a waste of time when considering their cost.

