The network for creativity
Join 1.25M professional creatives like you
Connect with clients, get discovered, and run your business 100% commission-free
Creatives on Contra have earned over $150M and we are just getting started
Back to feedPost
Project Brief: Stereo Tube Amplifier Design (From Scratch)
The goal of this project is to design a complete stereo tube amplifier from scratch, with a focus on proper engineering, stable operation, and high-quality audio performance. The design should be practical to build and test, with clear documentation and predictable results.
Given Requirements / Constraints:
Preamp: 1 × 6SN7 (shared between both channels)
Power stage: 2 × 6V6 (one per channel, single-ended)
Rectifier: 5U4
Power transformer: Hammond 272DX (144mA B+ max)
Output transformers: Custom, 5kΩ primary, 55mA max, gapped for 20Hz–20kHz HiFi use
Input signal: 1–1.5V nominal (2V max line level)
Target output: ~5W per channel at 2V input
Voicing: Final tonal shaping can be adjusted via coupling capacitor selection
Scope of Work:
Full circuit design of the preamp and power stages
Proper biasing of all tubes (preamp and power)
Power supply design including rectification and filtering
Gain structure design to meet input/output targets
Operating point calculations and validation
Integration of all stages for stable and optimal performance
Deliverables:
Complete, clean schematic (build-ready)
Clearly defined component values and operating points
Notes on design choices and expected performance
Guidance for implementation, testing, and initial troubleshooting
Objective:
To create a well-balanced, reliable amplifier design that meets the specified performance targets, minimizes distortion and noise, and avoids iterative trial-and-error during the build process.
The network for creativity
Join 1.25M professional creatives like you
Connect with clients, get discovered, and run your business 100% commission-free
Creatives on Contra have earned over $150M and we are just getting started
Related posts
Very excited to share our latest sound design work for the Audi RS5 F1 Edition! 🏎️⚡
#Working on this piece was all about channeling pure adrenaline and raw speed #crafting an auditory identity for a machine whose #sound hits you long before you even see it. To honor its direct bloodline with Formula 1, we built a fierce, high-octane #soundscape driven by visceral engine roars, aggressive exhaust notes, and #aerodynamic rushes that match the bold styling and blistering pace of the visual edit. A massive thank you to the stellar team for trusting us to bring the roar to this beast.
Direction: Krylov Motion
Animation & Texturing:Cgi Donatas
Environment: Illia Habruskyi
Sound Design: @penrose_audio
#sounddesign #automotive #cgi #motiondesign #audiopost #motorsport
Incredible!
Software design is a lot like sales… // Micro case study
You don’t win at sales by selling every feature you app offers. You win by speaking to the users specific needs, and removing everything else.
Spent quite a bit of time reworking this megamenu, tweaking spacing, refining the visual hierarchy, exploring iconography and tweaking the interactions until everything felt more natural and connected.
How's it looking now?
