An external phono preamp is one of the most upgradable components in any entry-level turntable system. The job of the phono preamp is to take the weak signal from the phono cartridge and amplify it so your speakers can play it at a reasonable volume. The best phono preamps not only amplify this signal but equalize it — staying true to the RIAA playback equalization curve — so that it sounds as true to the original recording as possible.
Integrated vs external phono preamps
Many entry-level turntables have integrated phono preamps, which allow you to hook the speaker directly up to powered speakers, a receiver or a powered amplifier. The problem is that these phono preamps are often cheap and more susceptible to distortion. But, most of these built-in phono preamps can be turned off or bypassed, which allows you to upgrade to an external phono preamp.

There are two primary types of phono cartridges that a turntable can have: moving-magnet (MM) or moving-coil (MC). Both convert vibrations into an audio signal, but they do so very differently. You need to get a phono preamp compatible with the same type of phono cartridge your turntable has. Generally, most entry-level turntables have an MM cartridge and higher-end turntables have an MC cartridge, as the latter has a more complicated structure that helps deliver a more accurate signal.
Gain control
Gain refers to how much the amplifier actually increases the audio signal — too little or too much gain will lead to a distorted sound. Most phono cartridges recommend a certain gain level for them to sound best, and you should get a phono preamp that matches that recommendation. That said, phono preamps that have adjustable gain control offer the ability for users to tweak the gain and, therefore, adjust the sound to the listeners’ liking.
Budget considerations
An “entry-level” phono preamp will cost between $50 and $200. If you’re buying a phono preamp that costs around $100, the rest of your turntable system shouldn’t cost much more than $500. If you have a higher-end system, upgrade to a higher-quality phono preamp.
How We Tested

There are quite a few phono preamps in the sub-$200 range that are designed to partner with an entry-level turntable. We’ve tested a number of them over the years, most of which have a turntable with an MM cartridge — the one pictured is a Pro-Ject T1 ($449). The below list is a combination of phono preamps that we’ve hands-on experience with as well as phono preamps from respected hi-fi makers.
To learn more about our testing methodology and how we evaluate products, head here.