Balanced XLR Phono Preamp Design
Publicada el 2026-07-26
Descripción de la oferta
I’m looking to develop a high-quality analogue phono preamp that feeds a Balanced XLR output. The core of the project is an accurate, low-noise circuit that preserves vinyl warmth while offering modern flexibility. Key requirements • Balanced XLR output only—no single-ended paths in the signal chain. • Adjustable gain so I can match a range of MM and MC cartridges without re-biasing the circuit. • Precise RIAA equalization with tight tolerance parts; please include simulated response plots. • Integrated subsonic (rumble) filter that can be switched in or out. • Powered from a standard AC adapter; include suggestions for onboard regulation, grounding, and hum suppression. Deliverables 1. Complete schematic in PDF and the native file of your preferred ECAD tool (KiCad, Altium, or similar). 2. BOM with part numbers readily available from major suppliers. 3. PCB layout files and Gerbers, laid out for minimal crosstalk and clear ground strategy. 4. Brief design report explaining gain settings, RIAA component selection, filter corner, and any measurements or SPICE simulations you ran. 5. Assembly and test guideline so I can build and validate a prototype on my bench. I’m comfortable reviewing drafts and giving prompt feedback, so please outline your development flow and estimated milestones in your bid.
Skills
Fuente original: freelancer