1. Things you need to know about the new ‘Conversations’ PM system:

    a) DO NOT REPLY TO THE NOTIFICATION EMAIL! I get them, not the intended recipient. I get a lot of them and I do not want them! It is just a notification, log into the site and reply from there.

    b) To delete old conversations use the ‘Leave conversation’ option. This is just delete by another name.
    Dismiss Notice

"A" Class amps

Discussion in 'audio' started by bob57, Aug 25, 2012.

  1. bob57

    bob57 Active Member

    I have a Sugden A21mk2 amp and would like to try a more powerfull "A" class amp. Can anyone suggest anything comparable to the Sugden in pure class A.
    I am already considering the newer A21a and the series 2 and also the SE but have yet to see them come up on the second hand market and am hoping that maybe there are other amps out there on ebay or the like that may be good alternatives to the Sugden in pure "A" Class.
    Regards Bob
  2. zener

    zener fluff

    why would you need more power ? If it sounds good , enjoy it and stay away from this forum.
  3. bob57

    bob57 Active Member

    I like to try different amps to see how they perform and with different sources. Although I am running out of space so will have to stop soon.
    I enjoy my music but also enjoy trying different components to see how they sound, and how the sound compares to their reviews.
    Regards Bob

    YNWOAN 100% Analogue

    Krell - you won't need the heating on in the winter either.
  5. Kt77

    Kt77 pfm Member

    If you're able to get away with older designs in power amps?, then either a Forte Model 1a or 4a would certainly serve as a very nice sounding choice. These are both rated at 50 w/pc pure class A. These were often used with something along the lines of an Audio Research SP - 9 MK III or Conrad-Johnson PV-5 of the time. NOS in vintage, but highly musical none the less.

    Just a thought,
    o_O scar
  6. Cheese

    Cheese Bitter lover

    zener, why don't you just shut up.
  7. paskinn

    paskinn pfm Member

    Krell ksa 50, shouldn't be more than £1200, in good nick. Proper Class A too. Mind you, it isn't the exact type of technology that determines sound, it is how well it is done. so some class a/b amps sound just as good.
    And then, if you really want an adventure, why not try the wonderful world of valve amps?
  8. per flemming

    per flemming Registered User

    Maybe changing speakers to slightly more effective ones might do the trick ?
  9. Igloo Audio

    Igloo Audio Registered User

    Hi Bob,

    We really like Sugden (which reminds me), but you're more than welcome to visit and compare to the ATC Class A/B design.

  10. uncl_nigel

    uncl_nigel pfm Member

    If you like living dangerously - they can be quite scary when a power tube goes !!!

    Personally, I am seriously looking at a class A solid state amp - I rather like the idea of the amp not bursting into smoke/flames while I leave the room for a couple of seconds to use the loo.
  11. koi

    koi pfm Member


    I changed from one of your amps to an Electrocompaniet amp which had a lot more power

    Maybe worth a look?
  12. wacko

    wacko pfm Member

    Keep the Sugden or go tube. Seriously.
  13. Barrymagrec

    Barrymagrec pfm Member

    It`s suprising how often that doesn`t happen.
  14. Steven Toy

    Steven Toy L3 Toy

    Ditto. I like the Sugden A21 a lot but now I've got 45 Watts of pure class A via a set of KT120s that are having an easy life (i.e. should last for ages) I doubt I will be changing.
  15. muzzer

    muzzer Numb Nut

    Pass Labs do some powerful Class A jobbies.
  16. Arkless Electronics

    Arkless Electronics Trade: Amp design and repairs.

    The problem with the A21 is all the vintage circuitry of the preamp section that the signal has to pass through before reaching the class A power amp....
    I also have one of these in my collection but I only used it once as I found it a bit too warm and veiled..... Amazingly good for the time though!
    I use class A amps most of the time in my main system and swear by them though ;)
  17. paskinn

    paskinn pfm Member

    In truth, I have had more exploding solid state amps than valve ones (true!).
  18. Arkless Electronics

    Arkless Electronics Trade: Amp design and repairs.

    Solid state is much more reliable, especially power amps, but valve amps are much easier to repair when they do go wrong.... swings and roundabouts.
  19. hammeredklavier

    hammeredklavier owner of two very cheap hi-fis

    I'm feeling left out now, I've never had any piece of hi-fi equipment explode or set on fire! (I've never had valves though...)
  20. uncl_nigel

    uncl_nigel pfm Member

    Once is enough...

    ... to scare the s**t out of you!

Share This Page


  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice