ohcrapgorillas
500+ Head-Fier
I use a Bottlehead Crack at home with mine, and it sounds incredible with a couple of caveats:
1. My Crack is super hotrodded (power cap bypasses, replaced last power cap with PP film cap, choke, CREE diodes, PP film output caps with PIO bypasses, Blue Velvet pot, Bottlehead power cable), without mods I don't think it can really push enough detail to do the Atticus justice. Fully modded, I think it's competitive with TOTL amps... it won't win, but it will at least compete. At some point I am going to open it back up and replace the signal wire with 6N OCC copper, as well as getting rid of the RCA input jacks and just have one long length of wire from volume pot to source.
2. The high output impedance is somewhat apparent, if going back and forth between the Crack and a solid state amp, there is a little bit of looseness to the low end. I mean a little bit. It is not audible if you don't have a solid state amp for direct A/B comparison. On the other hand, the Sennheiser HD600, 650, and 800 all sound fantastic out of the Crack, very sharp and detailed, that looseness is nowhere to be found.
Edit: Just wanted to mention about the CTH that I don't usually drive my Atticus with it, I use the Crack as I mentioned above. The CTH stays at my office to drive the ZMF Classic, a job which it does exceptionally well. I highly, highly recommend the Classics as a budget pair of closed backs with the ZMF house sound.
1. My Crack is super hotrodded (power cap bypasses, replaced last power cap with PP film cap, choke, CREE diodes, PP film output caps with PIO bypasses, Blue Velvet pot, Bottlehead power cable), without mods I don't think it can really push enough detail to do the Atticus justice. Fully modded, I think it's competitive with TOTL amps... it won't win, but it will at least compete. At some point I am going to open it back up and replace the signal wire with 6N OCC copper, as well as getting rid of the RCA input jacks and just have one long length of wire from volume pot to source.
2. The high output impedance is somewhat apparent, if going back and forth between the Crack and a solid state amp, there is a little bit of looseness to the low end. I mean a little bit. It is not audible if you don't have a solid state amp for direct A/B comparison. On the other hand, the Sennheiser HD600, 650, and 800 all sound fantastic out of the Crack, very sharp and detailed, that looseness is nowhere to be found.
Edit: Just wanted to mention about the CTH that I don't usually drive my Atticus with it, I use the Crack as I mentioned above. The CTH stays at my office to drive the ZMF Classic, a job which it does exceptionally well. I highly, highly recommend the Classics as a budget pair of closed backs with the ZMF house sound.
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