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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: Using steel enclosure as ground. posted by rob r. on March 22, 2005 at 12:04:56:
Steel in NOT a good ground medium because it exhibits hysterisis i.e. it does not carry all frequencies (within and above the audio band) equally. It is suitable as an electrical ground ONLY unless the steel enclosure is lined with copper sheeting that is bonded to the steel. It is terrible as a ground for audio signal connections because of its' hysterisis. Too few people appreciate the importance of good grounding. It is the other half of the circuit and at least as much care should be devoted to the ground system as to the signal carrying system. The quieter (more efficient) the ground system the more resolution of fine detail will be presented. The design you refer to sounds as tho the most important factor to the manufacurer was lowering his cost and to hell with sonics, etc. I prefer to use a 3-wire linecord with the 3rd wire connected to the chassis. The system (audio) ground should be a Central Ground point that is ISOLATED electrically from the enclosure. Ideally you should use a separate CGP for each channel. Otherwise you do not have a true Dual-Mono construction. I'd be very surprised if your unit doesn't use a single tfmr. for the 2 channels. The seperate isolated CGP's also produce much greater resolution of fine detail.Happy Listening !
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Follow Ups
- Re: Using steel enclosure as ground. - pkell44 18:04:57 03/22/05 (0)
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