5x5 Headphone amplifier/Preamplifer
Two stage opamp amplifier PCB, non-inverting amp followed by buffer, pot in between. First stage voltage amp, second stage current amp.
Features:
• 2-layer board
• Red PCB!
• Local feedback
• All thru hole components
• Input&feedback low pass filters ala O2
• Separate signal, load & decoupling ground
• Caps in signal path (Input & Feedback low pass filter) – multi-footprint 2.5, 5mm Ls, available width 5-6 mm (MLCC or Film Caps possible)
• Coupling Caps - available multifootprint 2.5mm - 15mm (L) X max 8mm (W)
• Input & Output 3.5mm jack onboard
• No power supply on board only rail-to-ground caps
• Component values are like O2
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