| OPAMP | Description | Do I own one? |
| OPA2227 | Laid back BB sound, great 80Hz bass, but muddy mids and highs | Yes |
| OPA637 | Exceptional performance all around. Almost too detailed for music | Yes |
| LM4562 | I guess it was great? It burned down | No |
| NE5532 | Sounded alright, but high DC offset! | Yes, 100x |
| 741 | Not for music amplification | Yes |
goodbye, world!