| Best modern 6550 tube for ARC per-amp | johnss | 12130 | 27 | |
| Esoteric Grandioso K1 "Disc Error" | jafant | 3795 | 10 | |
| Tung Sol 6550 NOS vs Grove Tube 6550A NOS | rodman99999 | 1350 | 5 | |
| NBS 3S power cable | hiendmmoe | 3649 | 11 | |
| Esoteric Grandioso K1: What are the best Up-conversion settings for CD? | | 2236 | 0 | |
| Acrolink 8N-PC8100 Performante Power Cable | ryder | 8645 | 21 | |
| Wilson Audio Sasha 2 for small room? | mmbl622 | 5651 | 6 | |
| Wilson Audio Sasha I or 2 ? | dhite71 | 4616 | 2 | |
| Questions about NBS power cable | bsimpson | 7576 | 1 | |
| Worth to upgrade my Audience aR6-TSS to aR6-TSSOX? | chayro | 1540 | 2 | |
| ARC Ref 6 + Boulder 1160 | fsmithjack | 2662 | 1 | |
| Tung Sol NOS Black Plate 6550 – Temperature | xti16 | 2932 | 2 | |
| 6550 tube for ARC Ref 6 | mattmiller | 1296 | 1 | |
| Pass Labs X 350.8 or 350.8? | theothergreg | 3348 | 4 | |
| Choice between Pass Labs & Constellation amp | jbrrp1 | 6845 | 3 | |
