Speaker Cable Verification Suite

Loss, power, damping, tilt, array Z, ampacity & thermal, SPL & headroom, distributed lines, and connector checks. Dark/light, “realistic HF” and shareable presets included.

Run Parameters

Gauge (mm²) Length (m) Nominal per-cabinet impedance (Ω) Cabinets in parallel on this run Cable inductance L₀ (H/m) Typical: ~0.6 µH/m ⇒ 0.6e-6 Target speaker power (W) For power/thermal & SPL calc.

Amp output impedance (Ω) For damping factor Amp minimum load (Ω) Array checker

Band & Thresholds

Effective load: 8 Ω

Max allowed loss (dB) HF tilt target (dB, 1k→10k)

Realistic HF load Impedance rises with frequency (≈ +50% by 10 kHz). Subs mode ignores this.

Acceptance thresholds

Full-range (defaults: green ≤ 0.5 dB, yellow ≤ 1.0 dB)

Green ≤ (dB) Yellow ≤ (dB)

Subs (defaults: green ≤ 1.0 dB, yellow ≤ 1.5 dB)

Green ≤ (dB) Yellow ≤ (dB)

Resistive loss (dB)

––

Amp output Z≈0, load purely resistive.

Band-average loss (dB)

––

R + jωL model averaged over band (L₀ default ≈ 0.6 µH/m).

Max length @ −0.5 dB (m)

–

Resistive model.

Power, Damping & HF Tilt

Cable resistance (Ω)

–

Current at target (A)

–

Power lost in cable (W)

–

Loss fraction (%)

–

Damping factor (at speaker)

–

HF tilt (1k→10k) dB

–

Max length for tilt target (m)

–

Array Impedance Checker

Series count (N_s) Parallel count (N_p) Total boxes

Total array impedance (Ω)

–

OK vs amp minimum?

–

Z_array = Z_cab · N_s / N_p (identical cabs).

Quick lookup (resistive model)

Nominal Load (Ω)	Gauge (mm²)	Max length @ −0.5 dB	Max length @ −1.0 dB

Badges reflect your thresholds and selected band.

Cable Ampacity / Thermal Margin

Safety factorMultiply rating Bundling derateMultiply rating Ambient ΔT (°C)Optional; +°C raises R α_cu (1/°C)Temp coeff

I_RMS (A)

–

Rating adj. (A)

–

Status

–

R @T (Ω)

–

Ratings are approximate free-air figures; adjust with safety & derate for bundles / install methods.

Burst Stress / I²t

Crest factor (dB) Duty cycle (%) Show length (h)

I²t demand (A²·s)

–

I²t budget (A²·s)

–

Status

–

Budget uses (I_allow)² × total seconds × safety. Demand uses I_RMS² × seconds × duty. Conservative guide.

SPL at Listener (incl. cable loss)

Sensitivity (dB @2.83V/1m) Boxes (N) Distance (m) Air loss (dB/100m)

SPL w/ loss (dB)

–

SPL no loss (dB)

–

Delta (dB)

–

Assumes incoherent sum (+10·log10 N), inverse-distance (−20·log10 r), and air absorption.

Headroom Checker

Target SPL (dB) Crest factor (dB) Assumed Z_ref (Ω)

Req. speaker power (W)

–

Req. amplifier power (W)

–

Status

–

Back-solves P to hit target SPL; amp power includes cable loss for current settings.

70V / 100V Calculations

Line voltage Total taps (W) Max loss allowed (dB) Suggest from gauges (mm²)

Line current (A)

–

Eq. load (Ω)

–

Loss (dB)

–

Suggested gauge

–

Equivalent load: Z = V²/P_total. Uses resistive loss model with your length.

Conductor Suggestion Table

mm²	Loss @ length (dB)	Status

Connector Ratings

Connector I_RMS max (A) Connector V_max (V) Peak margin factor

V_rms @ amp (V)

–

V_peak @ amp (V)

–

Status

–

Uses current P_amp requirement for your target speaker power and present cable.

Speaker Cable Verification Suite

Run Parameters

Band & Thresholds

Acceptance thresholds

Resistive loss (dB)

Band-average loss (dB)

Max length @ −0.5 dB (m)

Power, Damping & HF Tilt

Array Impedance Checker

Quick lookup (resistive model)

Cable Ampacity / Thermal Margin

Burst Stress / I²t

SPL at Listener (incl. cable loss)

Headroom Checker

70V / 100V Calculations

Conductor Suggestion Table

Connector Ratings

Notes