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| Absolute Polarity Switch | tommylion | 3426 | 24 | |
| Quantum Science Audio Thread | jafant | 84741 | 564 | |
| DIY Hifi Django Mini TVC Pre | pioneerhip | 3067 | 5 | |
| Audioquest Fog Lifters | ozzy | 6255 | 13 | |
| Totally Free, Easy DIY Cable Lifters | tommylion | 2072 | 2 | |
| Kimber D60 Digital Cable? | grm | 4604 | 5 | |
| Electro-Harmonix 2A3 Gold? | roberjerman | 1262 | 1 | |
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| Audio Note E Speaker Tweak: Easy Effective And Inexpensive | tommylion | 2847 | 5 | |
| High Fidelity Cables MC-0.5 Waveguide and Total Contact | slaw | 8949 | 53 | |
| Trying different output impedance taps with tube amps | atmasphere | 6115 | 10 | |
| Synergistic Research XOT Carbon Crossover Transducers | tommylion | 8722 | 15 | |
