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Need more bass thump from Champ

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  • #16
    Urg! You mentioned negative feedback.

    And we all know it's evil, because it has the word "negative" in its name.

    I always suspected that audiophiles prefer triodes to pentodes because triodes have a kind of internal negative feedback, that gives them their lower plate resistance. Some days it seems that the only good kind of NFB is the kind that hi-fi freaks are too dumb to spot.

    For musical instrument amps we just do whatever makes it sound good.
    "Enzo, I see that you replied parasitic oscillations. Is that a hypothesis? Or is that your amazing metal band I should check out?"

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    • #17
      Originally posted by IL Leone View Post
      What Kinda spkr is in it? different amp but a ragin cajun really bumped up the bottom and sensitivity in my super champ... Leo
      Yeah, when I hear Champ, I think of a crappy 8" speaker. Have you tried plugging into a good 1x12 or 2x12 cabinet.?
      Good Luck
      https://www.youtube.com/watch?v=7zquNjKjsfw
      https://www.youtube.com/watch?v=XMl-ddFbSF0
      https://www.youtube.com/watch?v=KiE-DBtWC5I
      https://www.youtube.com/watch?v=472E...0OYTnWIkoj8Sna

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      • #18
        Steve, It's funny you mention that the "audiophiles" tend to prefere triode connected pentodes or actual triodes, probably as a result of their greater linearity due to internal NFB. But I'll bet you a dollar that the same "audiophiles" will also profess that an amp with no NFB at the output has "more space between the notes" or some other ethereal BS undefinable term. I just can't get enough of the funny as $h!t stuff these guys will buy. From "audio grade" fuses to gold plated wall plug outlets. It's so laughable that even I can't help enjoying it. And I'm the kind of guy who turns the radio station when the DJ's are playing a prank on someone because I get embarrassed for the victim.

        Chuck
        "Take two placebos, works twice as well." Enzo

        "Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas

        "If you're not interested in opinions and the experience of others, why even start a thread?
        You can't just expect consent." Helmholtz

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        • #19
          Originally posted by MWJB View Post
          How big is your main B+ filter, go to 100uf if it is less than this.
          Heap thanks for posting this MWJB. I have a 4210 Marshall combo that has always had an annoying 120 Hz hum. New filter caps have never eliminated this. Yesterday I pulled the chassis and added 25 uF caps in parallel to both the 50 uF 1st and 50 uF 2nd filter stages. The hum is now a low normal.

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