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QUAD 520f a 606MKII or possibly a 909?

Discussion in 'audio' started by darkmatter, Apr 8, 2021.

  1. darkmatter

    darkmatter pfm Member

    In an unmodified state what are the Performance differences between QUAD 520f a 606MKII and a 909? I am trying to get a feel which ultimately is the better performing overall?

    Secondly is the power supply of the 909 bigger than the 606 MKII?

    I could consider the 707 but have not mentioned that in the title, and only a few of the 909s were made in the UK?

    I am thinking of getting one of these but have heard that the QUAD bus is a possible hindrance affecting some aspects of the sound quality of the 707 and 909? shouldn't be an issue as I will be only using the phono inputs.

    I will be using a Townshend Allegri TVC pre-amp as well so do not need the bus connection facility in the 707/909

    This is in a second system and the amp will be powering a pair of BBC KEF made LS5/1AE Loudspeakers


  2. the caretaker

    the caretaker pfm Member

    I am currently listening to my 909 - its the power amp of my first system! Powering a pair of AE1 mk3s...and I think it might be made in China.. sounds first rate! If you get a 909 try a schiit sys as the pre amp? Its very good
  3. stevec67

    stevec67 pfm Member

    A friend has 520 and 707, says both are great.
    the caretaker likes this.
  4. Seanm

    Seanm pfm Member

    What I’d like to know - and apologies for thread hijack but might have some bearing - is whether the output impedance changes between the 606 era (which is also 306 era?) and the 909 and later. I have a 306 that’s working very well with Tannoys and my understanding (!) is that this might have something to do with its relatively high impedance/low damping factor. Needs a service though and I wonder if I wouldn’t be better off just getting a 909. can’t find the relevant specs in relation to any of them.
  5. Gervais Cote

    Gervais Cote Predator

    M’y best would be a 909 made in UK as it will last forever and will make sing any type of speakers no matter the impedance, sensitivity or size while producing a non fatiguing sound.
    Ianp, darkmatter and the caretaker like this.
  6. raysablade

    raysablade pfm Member

    darkmatter likes this.
  7. darkmatter

    darkmatter pfm Member

    Typically what would I expect to pay for a 606 or a 909 prices on a certain online auction site vary wildly

    I have been offered a 606 MKi with upgraded PS and 909 boards but sans BUS so not sure what to offer for it?
  8. darkmatter

    darkmatter pfm Member

    Thinking about offering £475?
  9. MEMF1980

    MEMF1980 Active Member

    I recently bought a 606mk2 in very good external condition with recently replaced caps for £415 delivered.

    Hope that may help.
    darkmatter likes this.

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