Compare Tiers

Four tiers of magnetic neutrality. One correct choice for your latitude. This page exists so you can arrive at it with documentation.

The Tier System

Tropic

Suitable below 23.5° latitude when properly oriented.

Meridian

Recommended for temperate listening rooms with measurable self-control.

III

Equinox

Reference tier for listeners unwilling to move but willing to document why.

Zero-Point

Required when geography has already failed.

	Tropic	Meridian	Equinox	Zero-Point
Latitude tolerance	±23.5°, tropics only, properly oriented	±45.0° with seasonal recalibration	±66.5°, continuously documented	Unrestricted. Geography is compensated, not obeyed.
Break-in requirement	200 hours of equatorial-adjacent material	450 hours, anchored to an equinox	900 hours under dealer supervision	Pre-broken-in at the factory, at 0.0000°
Warranty compliance burden	Annual self-declaration of hemisphere	Quarterly latitude affidavit	Continuous GPS logging, notarised monthly	A calibration officer is assigned to you
Recommended hemisphere	Either, provided you stay in the tropics	Northern. Southern by written waiver.	Both, alternating at the equinoxes	Neither. The hemisphere adapts to the product.
Solar flare survivability	Kp ≤ 3 (listening suspended above)	Kp ≤ 5 with audible grace degradation	Kp ≤ 7 with automatic disengage	Survives X-class events it has already predicted
Required documentation	Proof of purchase	Proof of purchase and an orientation log	Notarised alignment dossier	Included with the product. Reading it is mandatory.
Emotional ownership cost	Mild seasonal anxiety	Recurring doubt, professionally managed	You explain the purchase clearly, and often	Serenity. Invoiced separately.

All figures verified at 0.0000° latitude. Performance at your latitude is your responsibility.

Four questions. One tier. The selector is deterministic; your latitude is not negotiable.

Listening latitude

Budget seriousness

Listening format

Scepticism tolerance

Measured Still asking questions

Tier assignments are based on published geophysical constants and cannot be appealed. Listeners between tiers should purchase the higher one.