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Thread: Douk Audio budget tubed pre amp and Firebottle rebuild

  1. #1
    Join Date: Apr 2014

    Location: swansea

    Posts: 234
    I'm gerald.

    Default Douk Audio budget tubed pre amp and Firebottle rebuild

    I picked up a Douk Audio Affordable 12AX7 Valve Tube Preamp

    http://www.ebay.co.uk/itm/Douk-Audio...item3f54325cd2

    Sent it to Fire bottle the amp is based is based on the old Marantz seven circuit .
    He rebuilt the circuit and turned one input into a phono stage and sorted the power supply ,I was using a Arcam A65 as a pre and two Arcam Alpha p8 power amps.
    So after burning in the tubes the sound was great but just lacking something so I made a shielded mains lead that improved things tried a couple of different interconnects then I used a set given to me by member here after the dog chewed a couple of sets .
    So after fitting the Chord Calpso leads the system is just stunning stereo seperation is superb bass and treble spot on.
    This pre amp has turned my bugdet system system into something that I thought I would never dream of getting in sound reproduction on a very tight budget .

    I have to thank Alan for the work he has done re designing the circuit and the power modifications and it is still on chinese tubes at the momment.

  2. #2
    Join Date: Oct 2016

    Location: Lisbon, Portugal

    Posts: 44
    I'm Luis.

    Default

    Hi,

    If I get one of these and connect it to my amp, set it to power amp, should I get what kind of sound sig?

  3. #3
    Join Date: Apr 2014

    Location: swansea

    Posts: 234
    I'm gerald.

    Default

    what amp have you got now ?

  4. #4
    Join Date: Oct 2016

    Location: Lisbon, Portugal

    Posts: 44
    I'm Luis.

    Default

    Audialab 8000s

  5. #5
    Join Date: Apr 2014

    Location: swansea

    Posts: 234
    I'm gerald.

    Default

    yours wont work a pre amp needs power amp or amps .

  6. #6
    Join Date: Apr 2012

    Location: Southall, West London

    Posts: 25,395
    I'm Geoff.

    Default

    Quote Originally Posted by diviy View Post
    yours wont work a pre amp needs power amp or amps .
    Not so. An integrated amp can be used as a power amp. I may be wrong, but I believe the 8000S may have a pre-amp bypass.
    Mr. Tact!

    Main system: MMs/ADCs/Low output MC's/One rare Japanese SUT/One scarce British phono stage/various tonearms/hefty Japanese DD TT and hefty Japanese BD TT and small British BD TT. 4 CD players/2 jitter buster/2 DACs/Valve buffer. TVC stepped attenuator or valve pre-amp or solid state pre-amp. Current dumping power-amp or either of two Class A SS power-amp or Class A EL34 valve monos or big Japanese (part Class A) integrated. Big dual concentric speakers/Smaller dual concentric speakers/Two way British compacts and full range speakers, amongst others. And too much more to list!

  7. #7
    Join Date: Apr 2014

    Location: swansea

    Posts: 234
    I'm gerald.

    Default

    I checked the manual and it can be used as a preamp nothing about power amp from what I can make out from the manual .

  8. #8
    Join Date: Oct 2012

    Location: The Black Country

    Posts: 3,418
    I'm Alan.

    Default

    Quote Originally Posted by SantanaCorreia View Post
    Hi,

    If I get one of these and connect it to my amp, set it to power amp, should I get what kind of sound sig?
    I don't recommend one of these budget pre-amps as bought, the design is flawed. Also for those in the UK the 220V rating is too low, the valve heaters will be overrun on 240V mains.

    I fitted a bucking transformer and did a complete redesign for Gerry.

  9. #9
    Join Date: May 2008

    Location: Surrey

    Posts: 5,625
    I'm Rob.

    Default

    There is a power amp IN setting on the 8000S
    Buy Bose...And get your parking validated!.

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