A phono preamp is the essential link between your turntable and the rest of your audio system. Without it, vinyl sounds thin, quiet, and completely wrong. Here is what it does and which one to buy.

Phono Preamp Guide: Why You Need One for Vinyl

What a Phono Preamp Does

A turntable cartridge generates a signal that is roughly 1,000 times weaker than line-level audio. A phono preamp amplifies this signal to line level so your amplifier or powered speakers can use it.

But amplification alone is not enough. During vinyl mastering, the RIAA equalization curve cuts bass and boosts treble to fit more music into the groove. The phono preamp applies the inverse RIAA curve, restoring the original frequency balance. Without this correction, vinyl sounds tinny and bass-light.

Built-In vs External

Many turntables (like the Audio-Technica AT-LP120XUSB) and amplifiers (like the Yamaha A-S301) include built-in phono preamps. These are adequate for getting started but typically use basic circuits.

An external phono preamp uses higher-quality components and often sounds noticeably better. The improvement depends on the quality gap between your built-in preamp and the external one.

MM vs MC

Moving Magnet (MM) cartridges output 2-5 millivolts and are the standard on turntables under $1,000. Most phono preamps support MM.

Moving Coil (MC) cartridges output 0.2-0.5 millivolts and require significantly more gain. Only phono preamps with MC support or a separate MC step-up transformer work with these cartridges. MC setups are typically $1,000+ total.

If your turntable is under $500, you almost certainly have an MM cartridge.

Top Picks

Budget ($50-$100)

ART DJ Pre II — $65: The standard budget recommendation. Clean amplification with adjustable gain. Supports MM cartridges. Powered by wall adapter.

Schiit Mani 2 — $149: Adjustable gain for both MM and MC cartridges. Four gain settings cover most cartridges. Clean, transparent sound that punches well above its price.

Mid-Range ($150-$500)

iFi Zen Phono — $200: Supports MM and MC with multiple gain and impedance settings. Subsonic filter reduces turntable rumble. USB output for digitizing vinyl.

Pro-Ject Phono Box DS3 B — $400: Fully balanced design with extensive loading options. The balanced output reduces noise over long cable runs. Premium sound quality.

Connection Guide

1. Connect turntable RCA outputs to phono preamp inputs
2. Connect turntable ground wire to preamp ground terminal
3. Connect preamp outputs to amplifier’s LINE input (not PHONO input)
4. Set turntable’s built-in preamp to OFF/PHONO if it has one

If your amplifier has a PHONO input and you use an external preamp, connect to any LINE input instead. Connecting to the PHONO input double-applies the RIAA curve.

For the full turntable setup chain, see our [INTERNAL: turntable-setup-guide].

Key Takeaways

• A phono preamp amplifies the turntable signal and applies RIAA equalization
• Built-in preamps work for starting out; external units improve sound quality
• MM and MC cartridges require different preamp gain levels
• The ART DJ Pre II at $65 and Schiit Mani 2 at $149 are the top budget choices

Next Steps

Complete your turntable setup with our [INTERNAL: turntable-setup-guide]. For speakers that pair well with vinyl, see [INTERNAL: best-speakers-for-vinyl].