OpenStereoMatrix

OpenStereoMatrix is a web-based, interactive speaker wiring designer supporting everything from basic stereo (2.0) to full 5.1 surround setups. Easily calculate impedance, power dissipation, and generate wiring schematics and BOMs. Perfect for both hobbyists and professionals, as well as complete neophytes.

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🔗 Live Demo

Visit the live demo:
https://bocaletto-luca.github.io/OpenStereoMatrix

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🚀 Features

• Impedance calculation for series, parallel, and bridged configurations
• SVG wiring diagrams for modes 2.0, 2.1, 4.0, 5.0, 5.1
• Interactive calculator: impedance, total and per-speaker power
• BOM generation guidelines for resistors and connectors
• Thermal and mounting tips
• Accessibility: aria-label, <title>, in-page anchor navigation

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📊 Supported Modes

Mode	Speakers	Topology	Impedance	Notes
2.0	2 × 8 Ω	Series / Parallel	16 Ω / 4 Ω	Standard stereo
2.1	2 × 8 Ω + Sub	Stereo + LC Crossover	4 Ω + sub	Passive LC network for subwoofer
4.0	4 × 8 Ω	Series–Parallel	8 Ω each	Balanced quad setup
5.0	5 × 8 Ω	Surround	8 Ω each	Front/Center/Rear
5.1	6 × 8 Ω	Surround + Sub	8 Ω each + sub	Dedicated sub channel
Bridged	1 × 8 Ω	Bridged Amp	8 Ω	Doubles voltage swing

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🛠️ Quick Start

git clone https://github.com/bocaletto-luca/OpenStereoMatrix.git
cd OpenStereoMatrix

Simply open index.html in your browser—no server required.

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📐 Example Calculations

Series (2 × 8 Ω)

• Impedance: (8 + 8 = 16) Ω
• Power at 20 Vrms: (\frac{20^2}{16} = 25) W per speaker

Parallel (2 × 8 Ω)

• Impedance: (\frac{1}{\frac{1}{8} + \frac{1}{8}} = 4) Ω
• Power at 20 Vrms: (\frac{20^2}{4} = 100) W total (50 W per speaker)

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💻 Interactive Calculator

Located in the “Calculator” section, input:

1. Mode (series, parallel, bridged)
2. Number of speakers
3. Impedance per speaker (Ω)
4. Voltage RMS (V)

Click Calculate for instantaneous impedance and power results.

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📋 Bill of Materials (BOM)

Part	Value	Wattage	Footprint	Notes
Resistors	4.7 Ω	50 W	TO-220	Series/parallel damping
Capacitor	100 µF	—	Radial	Subwoofer LC filter
Inductor	1.0 mH	—	Radial	Subwoofer LC filter
Connector Block	3–6 pin	—	—	Speaker output terminals

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🌡️ Thermal & Mounting Guidelines

• Heatsink resistors ≥ 25 W
• Minimum 20 mm clearance for airflow
• Ferrite beads on long runs to limit EMI

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🎯 Contributing

Contributions, bug reports, and feature requests welcome!

1. Fork the repo
2. Create a branch (git checkout -b feat/my-feature)
3. Commit changes (git commit -m "Add feature")
4. Push branch and open a Pull Request

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📄 License

GPL v3 License. See LICENSE for details.