Speaker/Load Impedance Matching Calculator implementation

Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

Record owner

Guth Instruments

Lifecycle

verified-clean

Evidence ID

t5-222

Effect

Computation or source lookup only

Input and validation requirements

The specification exposes invalid-input and undefined-result hazards at zero or nonphysical impedances, and its parallel power-handling wording is convention-dependent. A robust implementation must reject nonpositive impedances, guard a zero parallel denominator, and label whether power handling is total pair power or per-speaker power.

Required corrections

No binding erratum is attached to this unique-name record. Implementers must still preserve the declared units, domain, and failure behavior.

Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

{
  "inputs": {
    "speaker_impedances": [
      {
        "value": 8,
        "unit": "ohm"
      },
      {
        "value": 8,
        "unit": "ohm"
      }
    ],
    "topology": "series"
  },
  "expected_outputs": {
    "combined_nominal_impedance_ohm": 16,
    "power_handling": null
  },
  "working": "Series formula: Z = Z1 + Z2 = 8 Ω + 8 Ω = 16 Ω. Power handling is undefined from the supplied inputs because no speaker power ratings or amplifier operating condition are provided."
}

Other records

Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

• VERIFIED_LEDGER.json
• evidence-tranche5/tranche5-results.json