The Conductor SL 9018 is a big upgrade from the HM-801. It drives the TH600’s with a lot more authority in the bottom end. In fact it thumps pretty hard when the recording calls for it. Also the upper midrange is smoother which is important because the TH600’s can get a little grainy up there on highly modulated recordings. Treble is always clean with full extension.
The Conductor SL 9018 has already pulled me through a lot of long days at my desk, and I expect it will be there for years to come. I will especially look forward to upgrades that I can purchase for this product.