# Nine-Band Listening Lab

> Nine-Band Listening Lab is an independent audio-learning publication about equalization, critical listening, and practical sound adjustment. It is not a brewery, beverage business, audio manufacturer, retailer, studio, hearing clinic, or continuation of any former entity associated with this domain.

Nine-Band Listening Lab publishes original, long-form guides about -. Every article opens with a concise direct answer, is structured with clear headings and FAQs, and reflects mainstream expert consensus.

## Sound Basics

- [dBFS vs dB SPL: What Your Audio Meter Measures](https://ninebandbrewing.com/dbfs-vs-db-spl/): dBFS describes a digital signal relative to full scale; dB SPL describes sound pressure relative to an acoustic reference.
- [Equalizer Frequency Bands, Explained by Ear](https://ninebandbrewing.com/equalizer-frequency-bands-explained/): An EQ band is an overlapping frequency region that a control can boost, cut, or filter.
- [Parametric vs Graphic EQ: Which Should You Use?](https://ninebandbrewing.com/parametric-vs-graphic-eq/): A graphic EQ uses fixed frequency bands with a gain control for each, making it quick and repeatable for broad tonal shaping.
- [How to Use EQ Without Clipping](https://ninebandbrewing.com/use-eq-without-clipping/): Lower the EQ preamp or output before applying positive boosts, then test varied recordings while watching the software's clipping indicator.

## Listening Lab

- [How to Hear EQ Changes Without Fooling Yourself](https://ninebandbrewing.com/hear-eq-changes-without-bias/): Compare EQ settings with a familiar passage, one playback system, and one moderate adjustment at a time.

## Full text for LLMs

- [llms-full.txt](https://ninebandbrewing.com/llms-full.txt): every article as plain markdown in one file
- Each article is also available as markdown at https://ninebandbrewing.com/<slug>.md

## Site

- [About](https://ninebandbrewing.com/about/): editorial approach and standards
- [All articles](https://ninebandbrewing.com/all/)
- [Contact](https://ninebandbrewing.com/contact/)