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Thread: Suggestions for cheap passive preamp...possibly for quad 306 etc?

  1. #1
    Join Date: Aug 2012

    Location: Lincs

    Posts: 683
    I'm Philip.

    Default Suggestions for cheap passive preamp...possibly for quad 306 etc?

    Cheaper the better.
    max 50

    Must have at least 3 rca inputs

    Cheers

  2. #2
    Join Date: Oct 2014

    Location: Surrey

    Posts: 150
    I'm Graham.

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    You won't get one for 50 but a little bit more will get a tisbury passive which is one of the better cheapie stepped attenuators. Go for the current version which has a 3 position attenuation switch essential for usage with the 0.5v input 306.

  3. #3
    Join Date: Apr 2012

    Location: Southall, West London

    Posts: 40,121
    I'm Geoff.

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    Quote Originally Posted by graham67 View Post
    You won't get one for 50 but a little bit more will get a tisbury passive which is one of the better cheapie stepped attenuators. Go for the current version which has a 3 position attenuation switch essential for usage with the 0.5v input 306.
    Yes. The input sensitivity on the 306 is too high for use with many passive or active pre-amps. Adjustable attenuation will definitely help.

    If you can find one, the Promitheus TVC pre-amp works great with the 306 and offers high sound quality. It's a very good match.
    "when common sense, logic and plausibility are excluded. All that remain are foolishness and lies"

  4. #4
    Join Date: Aug 2012

    Location: Lincs

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    I'm Philip.

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    Not to worry.
    Quad 306 not available anymore.

    I’m shortly to be ampless!

  5. #5
    Join Date: Oct 2015

    Location: West Yorks.

    Posts: 15
    I'm Jesse.

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    There's a nice little Creek 4330 on the bay last time I looked. That should work nicely with AN-K's.
    If set on another 306 and a stepped pot in a box, make sure it has enough steps for you.
    Or, have you tried a T-amp?

  6. #6
    Join Date: Apr 2012

    Location: Southall, West London

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    I'm Geoff.

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    Quote Originally Posted by philv View Post
    Not to worry.
    Quad 306 not available anymore.

    I’m shortly to be ampless!
    It's still worth looking for a 306, it's a nice sounding amp.
    "when common sense, logic and plausibility are excluded. All that remain are foolishness and lies"

  7. #7
    Join Date: Oct 2015

    Location: West Yorks.

    Posts: 15
    I'm Jesse.

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    Quote Originally Posted by walpurgis View Post
    It's still worth looking for a 306, it's a nice sounding amp.
    The 306 is a good little amp but second-hand prices are getting silly. Just a couple of years ago you could pick up a clean unit for 125. Now it's double that. A few will have passed through the hands of bodgers too.

  8. #8
    Join Date: May 2008

    Location: A Strangely Isolated Place in Suffolk with far away trains passing by...

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    I'm David.

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    One cheapie that also looks cute is the Schiit one, but by the time it comes to these shores, I don't know how competitive it is.

    The Tisbury is well made and you might find one at a good price. Personally, I'm not sure about the cheap attenuator it uses, as for me anyway, it seemed to deaden the sound very slightly (atmosphere in a recording is important to me) and this was in my own home made passive preamp (in an ugly Hammond project box) away from 'work.' This one I made up years ago, now has 25k film pots, the same as one of the pairs of old Crown amps I repaired.

    P.S. Quad amps can work well with a simple passive pot-in-a-box. Check absolute phasing though, as I can't bloody remember if it's the Quad preamp, power amp or even both (!) that invert the phase...
    Last edited by Spectral Morn; 12-01-2019 at 14:08.
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  9. #9
    Join Date: Dec 2014

    Location: UK, East Midlands

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    I'm Mike.

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    Quote Originally Posted by DSJR View Post
    P.S. Quad amps can work well with a simple passive pot-in-a-box.
    Don't have any knowledge of the 306 but in my experience with various 'pots-in-boxes' the 303 and 405-2 work and the sound is great but the travel of the pot is negligible before it becomes too loud.
    With the 405-2, I tried firstly pre-attenuating resistors in the box and also tried fitting a pot into the 405-2 itself (a la Keith Snook)

    Neither solution was ideal so went back to Quad pre-amps ....
    If you don't like my potatoes - please don't dig up my vine!

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