How we update prices and figures
What we update, how often, and what wins when two numbers disagree.
The catalog update
The catalog was last updated on October 4, 2026. We update prices, colors, packs and star ratings on a schedule, and a price can move between our update and your visit. If the price at checkout differs from ours, the checkout price is the one you pay.
Noise figures
The NRR or SNR on each page is the figure printed on that model's own label. That is where PROHEAR standards start: we do not compute, round up or average a rating, and a model without a stated figure shows none.
Ratings
Star ratings are the ones shoppers gave each model at our retail partner. Several colors of one model often share one pool of ratings, so we count a pool once.
When a model sells out
A model that sells out leaves the site at the next update and comes back when it is in stock again.