Hi Primare,
CJ GAT is 100ohms output impedance. I do not know about the ET3 but believe it is similar. I have compared Ref 3 in my system and Ref 5...like both. Did not upgrade my ACT 2 to Ref 3, instead considering it more lateral move particularly for the money. Definitely preferred Ref 5...but also did not go for that. Found demo GAT and am not looking back. Hope that is helpful.
CJ GAT is 100ohms output impedance. I do not know about the ET3 but believe it is similar. I have compared Ref 3 in my system and Ref 5...like both. Did not upgrade my ACT 2 to Ref 3, instead considering it more lateral move particularly for the money. Definitely preferred Ref 5...but also did not go for that. Found demo GAT and am not looking back. Hope that is helpful.