Sure does.

Sure does.

Posted by Ralph (M) on July 25, 2012 at 13:59:33

In Reply to: RE: cable geomety is not an artifact but it can cause it posted by rick_m on July 25, 2012 at 11:13:13:

No, the cables aren't matched. Microphones are usually set up to drive about 150 ohms at the input of the mixer, line level is usually 600 ohms.

With regards to parallel sections, you can of course do that with balanced differential as well. That is why I was careful to use the word 'topology' in the post you referred to. We use paralleled tube sections in the front end of our MP-1 preamp to help get lower noise, plus we have a 2-stage vacuum-tube CCS. I have found in differential circuits that you must have a 2-stage CCS or you just will not get the performance out of the resulting voltage amplifier. So as a result, it takes a total 8 tube sections (4 twin triodes!) to execute the single stage of gain at the input of our phono section in the MP-1.

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Follow Ups Full Thread

Topic - What is the benefit of balanced inputs/outputs - tz7 19:44:00 07/23/12 (17)

Lower noise floor and less cable effects. - Justlisten2 11:34:27 07/28/12 (0)

Another chance to screw up another leg of the signal -nt - jedrider 16:57:48 07/26/12 (0)

Cary SLP 05 single-ended sounds better than balanced - Jay Buridan 08:56:55 07/25/12 (0)

Cable immunity and lower noise - Ralph 10:55:36 07/24/12 (6)

RE: Cable immunity and lower noise - rick_m 19:56:40 07/24/12 (5)

The balanced line system was created for the sole purpose - Ralph 08:44:57 07/25/12 (4)

RE: The balanced line system was created for the sole purpose - rick_m 09:04:42 07/25/12 (3)

cable geomety is not an artifact but it can cause it - Ralph 09:14:57 07/25/12 (2)

RE: cable geomety is not an artifact but it can cause it - rick_m 11:13:13 07/25/12 (1)

Sure does. - Ralph 13:59:33 07/25/12 (0)

Caution - M3 lover 09:42:12 07/24/12 (0)

RE: What is the benefit of balanced inputs/outputs - Raiderman 09:31:08 07/24/12 (0)

Balanced preamps require double the number of amplification stages - hukkfinn 07:06:38 07/24/12 (3)

Totally incorrect - Victor Khomenko 08:15:02 07/24/12 (2)

RE: Totally incorrect - hukkfinn 09:06:46 07/24/12 (1)

Really Totally incorrect - Ralph 09:19:24 07/24/12 (0)

RE: What is the benefit of balanced inputs/outputs - b.l.zeebub 04:52:26 07/24/12 (0)

Follow Ups

Sure does. - Ralph 13:59:33 07/25/12 (0)

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