P Routing Index

This page is a routing index for P-terms. It groups together the topics that most often force electrical design, enclosure math, and audible listening results into the same decision chain.

That makes P one of the most practically useful letter pages in the meta set: many of these terms are not just vocabulary, they are design decisions with immediate build consequences.

Power and Wiring

• Parallel wiring: batteries in Chapter 11.2 and speakers in Chapter 6.1.
• Power: calculations, amplifier ratings, compression, distribution, peak vs RMS, and wire-gauge selection in Chapters 2, 6, 10, and 11.
• Protection mode: Chapter 7.3 and Chapter 11.6.
• Pulley ratio: alternator behavior in Chapter 11.1.
• Parasitic drain: Chapter 7.6 and Chapter 11.6.

Enclosure and Acoustic Terms

• Ported enclosures: EBS alignment, Helmholtz formula, port length, port noise, and tuning frequency in Chapter 10.3 and Chapter 6.3.
• Passive radiator: Chapter 10.5.
• Polyfill: Chapter 10.2.
• Polypropylene cone: Chapter 9.3.
• Pressure, sound: see SPL-related material.

Tuning, Phase, and Perception

• Parametric EQ: Chapter 4.4, Chapter 6.4, and Chapter 12.5.
• Phase: crossover phase shift, response graphs, and subwoofer polarity in Chapters 9 and 10.
• Polarity, speaker: Chapter 10.6 and Chapter 10.7.
• Preamp output: Chapter 4.5.
• Precedence effect and Psychoacoustics: Chapter 13.2.

Math and Reference Terms

• Peak vs RMS power: Chapter 6.5.
• Peukert's Law: Chapter 6.5.
• Passive crossover: Chapter 4.1.

Where To Go Next

If you are here because of wiring or current planning, continue into Electrical. If you are here because of port tuning, enclosure math, or phase alignment, continue into Subwoofer Enclosures, Measurement, or Tuning.

Common Decision Points

• Parallel wiring usually points to an electrical-capacity or impedance question, not just a connection method.
• Phase and polarity usually point to integration and measurement work, especially around subwoofer blending.
• Ported enclosure terms usually point to modeling, airspeed, and tuning-frequency tradeoffs rather than one-size-fits-all box advice.