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Built with the Audio purist in mind, the AG3000 eschews with all but 2 sets of balanced line level inputs, yet it is remarkably flexible. Each channel being controlled by 2 handbuilt stepped ladder volume controls allowing for the ultimate in tuning flexibility to make adjustments to the phase characteristics (both positive and negative halves of the signal) of each individual channel. Along with the individual phase control switches on the back panel (one for each channel) it allows for the ultimate ability to take control of each recording and establish just the right level of gain and phase variance.

Allowing this kind of flexibility over the gain required a power supply of equally high quality and tolerance. To this end we developed a true B+ power supply that uses custom manufactured Blue Circle polypropylene capacitors at all points, not just as bypass caps. Expensive to implement, the end result is a power supply of unequalled purity and stability.

The AG3000 is connected and astonishingly well sounding for the beginning.  I'm also delighted about the look and feeling.  Greetings and thanks to the creator.

My wife said that it sounds like if we had completely new, better loudspeakers.

Bern, Switzerland   October 2002

  • Inputs: 2 balanced XLR
  • Outputs: 2 balanced XLR
  • 4 volume controls, 2 per channel, to individually control both the positive and negative phase of the signal.
  • Individual phase switch for each channel.
  • Outboard power supply is housed in a matching full sized chassis featuring completely true dual mono B+ power supply using custom manufactured Blue Circle polypropylene capacitors (not just used as "bypass" capacitors as many manufacturers do.)
  • Power supply features 4 separate toroidal transformers to maintain low noise and accurate phase balance.
  • High speed Hexfred rectifiers
  • Full 35 amp capacity locking DC power connector umbilical from power supply to preamp.
  • Custom made Blue Circle power cord fitted with ground lift switch for ultimate system compatibility.
AG3000 Dual mono Balanced Preamplifier
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Contact:  bcircle@bluecircle.com  /  519-469-3215