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Vinyl Asylum: Phono signal has no common mode noise rejection by garth Welcome Licorice Pizza (LP) lovers! Setup guides and Vinyl FAQ. |
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In Reply to: Hate to chime in but... posted by Penguin on March 3, 2002 at 09:01:05:
A phono cartridge is a floating non-reference device. This means it has no zero voltage reference point thus no noise rejection capabilities.A serious disadvantage of a balanced or differential input is the reduced signal to noise ratio. The coil of the cartridge can only produce a given output. Depending on how it is hooked up you get all the voltage on one pole or the other if you reverse them or if neither is grounded the total output is sent to each pole or phase but at half the voltage. This reduces the signal to noise ratio. The added amplifier also creates more thermal noise than if only one were used. There is no noise rejection possibility until the output stage.
In conclusion I would say there is no advantage of a balanced input but for compatibility purposes a balanced output could make sense.
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Topic - Why balanced input on phono stage?? - Bruce Righter 04:12:51 03/3/02 ( 0)
- Re: Why balanced input on phono stage?? - Werner 22:36:46 03/3/02 ( 0)
Re: Why balanced input on phono stage?? - mikel 08:47:52 03/3/02 ( 0)
- Thanks - Bruce Righter 11:26:58 03/3/02 ( 0)
- Re: BAT phonostages - Bruce from DC 06:16:28 03/4/02 ( 1)
- Time for you to upgrade - Bruce Righter 14:29:14 03/4/02 ( 0)
Re: Why balanced input on phono stage?? - Eli Duttman 07:28:27 03/3/02 ( 0)
- Re: FWIW, here's how Atma-Sphere owners hook up carts to AS preamps - High-end Dreamer 11:36:00 03/3/02 ( 0)
- Re: FWIW, here's how Atma-Sphere owners hook up carts to AS preamps - Eli Duttman 14:33:24 03/3/02 ( 0)
Balanced Signal and Phono Cartridge Signal - Wally Malewicz 08:06:34 03/3/02 ( 0)
- Re: Balanced Signal and Phono Cartridge Signal - Eli Duttman 14:23:56 03/3/02 ( 0)
Hate to chime in but... - Penguin 09:01:05 03/3/02 ( 0)
- Phono signal has no common mode noise rejection - garth 03/3/02 23:37:41 03/3/02 ( 3)
- It depends on how your model is set up. - Penguin 13:56:20 03/4/02 ( 0)
- Thanks Garth, Case is Closed - Wally Malewicz 07:44:11 03/4/02 ( 0)
Re: Phono signal has no common mode noise rejection - Werner 02:09:52 03/4/02 ( 0)
MC Cartridge and Balanced signal - Wally Malewicz 11:01:17 03/3/02 ( 0)
Re: Why balanced input on phono stage?? - gware 07:17:55 03/3/02 ( 0)