it's not recommended by dakiom,unless it's a hybrid. A SS class D and pure tubes from what they say will not make much effect, but there's always exception to the rule. In my case, I used dakiom stablizers on both my PAXHTON integrated tube amp and on my grant fidelity blue laser cd 427 tube cdp using a modified ESS HEIL 1D loudspeaker in a DIPOLAR array design, replacing the passive radiator with an active woofer and result is AMAZING. Sounds like a live performance. I know in my tube set up, it works well and my solid state amps, but for other people's system that are tube, it may not have an effect.