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In Reply to: Sorry but posted by E-Stat on February 7, 2025 at 08:14:20:
"Regarding the Parasound JC-1+"
What they are calling Class A power is the power that the Class AB amplifier can make before any of the output devices reach cutoff.
That is not the same thing as true Class A power. The devices in a Class A amplifier are bias at the mid point between max current and cutoff.
The output devices in Class AB amplifier are biased at something lower than that, otherwise the amplifier would not be able to produce power beyond when half of the output devices reach cutoff because the other half of the output device would be at max at that same moment.
The JC-1+ can do 25 watts while all of the output devices are conducting 100% of the time and 450 watts total. Clearly the output devices are not biased at the mid point between cutoff and max current.
Tre'
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Follow Ups
- RE: Sorry but - Tre' 02/7/2519:33:53 02/7/25 (38)
- RE: Sorry but - E-Stat 19:37:41 02/7/25 (37)
- RE: Sorry but - Tre' 21:27:10 02/7/25 (36)
- In days past, class A was a textbook solution to lower distortion, cathode bias always sounds better to me_nT - Cleantimestream 07:55:17 02/11/25 (0)
- Ask the professionals - E-Stat 06:38:17 02/8/25 (34)
- RE: Ask the professionals - Tre' 06:45:16 02/8/25 (33)
- LOL! - E-Stat 06:49:37 02/8/25 (32)
- Hope they are not giving each other 'feedback'. That is not allowed :) - 13th Duke of Wymbourne 13:14:53 02/10/25 (4)
- Collaboration - E-Stat 15:42:34 02/10/25 (3)
- Who are the dudes? - 13th Duke of Wymbourne 16:57:23 02/10/25 (2)
- RE: Who are the dudes? - 13th Duke of Wymbourne 17:11:36 02/11/25 (0)
- That would be - E-Stat 17:05:25 02/10/25 (0)
- I never said that. They know exactly what they are doing. nt - Tre' 07:01:48 02/8/25 (26)
- I'm delighted that you acknowledge - E-Stat 07:03:39 02/8/25 (25)
- maybe you don't realize this? - Tre' 11:17:07 02/8/25 (0)
- even more. - Tre' 07:54:29 02/8/25 (0)
- More - Tre' 07:39:54 02/8/25 (0)
- RE: I'm delighted that you acknowledge - Tre' 07:22:10 02/8/25 (0)
- RE: I'm delighted that you acknowledge - Tre' 07:20:09 02/8/25 (7)
- Some clarification - 13th Duke of Wymbourne 13:12:24 02/10/25 (6)
- RE: Some clarification - Tre' 20:09:27 02/10/25 (5)
- RE: Some clarification - 13th Duke of Wymbourne 18:55:10 02/12/25 (0)
- RE: Some clarification - morricab 03:45:17 02/11/25 (3)
- RE: Some clarification - Tre' 07:37:47 02/11/25 (2)
- Hmm, best sounding class B is McIntosh; unity coupled circuit IS brilliant, however-nT - Cleantimestream 07:47:47 02/11/25 (1)
- Vintage Mac unity coupled consumer tube amps - Steve O 09:17:08 02/12/25 (0)
- You misunderstood me - Tre' 07:13:46 02/8/25 (12)
- And that's why they call it AB but it is not truly A - AbeCollins 10:35:38 02/8/25 (11)
- Thank you, exactly. - Tre' 11:21:52 02/8/25 (10)
- RE: Thank you, exactly. - morricab 01:02:23 02/11/25 (9)
- RE: Thank you, exactly. - 13th Duke of Wymbourne 13:23:03 02/11/25 (8)
- RE: Thank you, exactly. - morricab 07:08:36 02/12/25 (5)
- RE: Thank you, exactly. - 13th Duke of Wymbourne 12:24:48 02/12/25 (4)
- If you have a "dead zone" - Steve O 14:50:08 02/12/25 (3)
- How do you classify taxonomists? - 13th Duke of Wymbourne 11:18:59 02/13/25 (1)
- Hadn't considered that until now - Steve O 15:41:18 02/13/25 (0)
- RE: If you have a "dead zone" - morricab 06:37:17 02/13/25 (0)
- RE: Thank you, exactly. - Tre' 18:08:12 02/11/25 (1)
- RE: Thank you, exactly. - 13th Duke of Wymbourne 12:33:54 02/12/25 (0)