![]() ![]() Meanwell GS40A24-P1J + Noise Nuke LC filter - 24Vdc with 430 mA resistive load Meanwell GS40A24-P1J - 24Vdc with 430 mA resistive load Here are the Linear Technology Spice simulations with various dB vs. Examples include Garage1217 and the Massdrop Cavalli Tube Hybrid (MCTH) headphone amps.Ĭomponent values were chosen to achieve greater than 20 dB reduction at 60 Hz with greater than 60 dB reduction at 1000 Hz. ![]() It will work with any external SMPS or LPS between 1 and 48 VDC with current less than 2A. Parts cost was approximately $42 US in component single unit quantities, and about 2 hours of construction time. The following single massive stage LC filter will reduce SMPS residual ripple and noise. SMPS vs LPS effect on Garage1217 Project Sunrise III LPS effect on an example headphone amplifier may be found here: Unfortunately they often have higher residual noise which does affect amplifier performance. SMPS offer higher efficiency, less heat, smaller size and weight. External Switch Mode Power Supplies are included with many headphone amps as a way to keep cost and shipping weight down, except Schiit which use external transformers with true Linear Power Supplies internal to the chassis in their lower cost products. ![]()
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