Setting the subsonic filter switch, Using the pure direct switch, Phono (mm/mc) switch setting the mode switch | Yamaha AX-1090 User Manual | Page 12 / 16 | Original mode
iFi's ZEN Phono Brings Added Groove at an Affordable Price | StereoNET United Kingdom
Project 99 - Infrasonic Filter
Pro-Ject Phono Box RS Phono Preamp | Audio Advice
Pro-Ject Phono Box S phono preamplifier - maPlatine.com
KAB Electro Acoustics http://www.kabusa.com
Crutchfield - “This affordable phono preamp offers features you don't usually see at this price point. It's compatible with moving magnet and moving coil cartridges, and boasts an intelligent subsonic filter that
Pro-Ject Phono Box SE MM/MC Preamp with Subsonic Filter - Postage Included Photo #3119934 - US Audio Mart
AudioWind MC Phono stage w/Subsonic Filter/Ultra-linear balanced power supply/60 db gain Photo #3440221 - Canuck Audio Mart
iFi Audio launches its first entry-level phono stage