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Pioneer A400 Phono stage
Pioneer A400 Phono stage
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Old 5th February 2005, 06:32 PM   #1
Smiffy is offline Smiffy
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Join Date: Aug 2002
Location: UK
Default Pioneer A400 Phono stage

Hi All
Anyone any advice on mods,parts upgrade,tweaks for the above?
Have a schematic if of any help(only need to do the MM side of the circuit.
Based around 4570 op amp,running project Debut 2 with ortofon cartridge,The A400 phono stage sounds better than the project phono box does.Any help greatly appreciated
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Old 5th February 2005, 07:32 PM   #2
richie00boy is offline richie00boy  United Kingdom
Did it Himself
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Join Date: Nov 2003
Location: Gloucestershire, England, UK
Pioneer A400 Phono stage
I can't offer any tweaking advice for your A400, but I can tell you that if you search (Analogue forum IIRC) you will see a thread or two about the Project Phonobox and why it doesn't sound so good...
www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, modules and more.
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Old 6th February 2005, 08:50 AM   #3
Smiffy is offline Smiffy
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Join Date: Aug 2002
Location: UK
Found out about the project box,mine has the right values inside.
My mum still prefers the phono section of the A400 though.Says it sounds less weedy and thin than the project,just thought a few black gates and maybe op amp change may take it a bit further
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