Built-in vs External Phono Preamp

A turntable can't just plug into a normal amplifier and play — its signal is far too quiet and needs specific equalization first. The box that fixes that is the phono preamp, and you get it one of two ways: built into the turntable (or amplifier), or as a separate external unit. That choice shapes cost, sound, and how far your system can grow. Working from what a phono stage does and the consensus of owners who've upgraded, here's how to decide whether the built-in one is enough.

What a phono stage is actually doing

Two jobs, both essential. First, gain: a moving-magnet cartridge outputs a tiny signal that must be amplified up to the line level your amp expects. Second, RIAA equalization: records are cut with the bass reduced and treble boosted, and the phono stage applies the exact inverse to restore a flat, correct tonal balance. Skip it and you get a thin, quiet, wrong-sounding signal. Every vinyl setup includes a phono stage somewhere — the only question is where it lives: in the deck, in the amplifier, or in a box of its own.

The case for built-in

Convenience and cost. A built-in phono preamp — whether inside the turntable or a phono input on your amplifier — means fewer boxes, fewer cables, and no extra purchase. Many decks aimed at beginners include one, sometimes switchable so you can bypass it later; the AT-LP120X, for instance, has a defeatable built-in stage, so it can feed powered speakers or a line input directly. For a first system, a built-in preamp is genuinely fine — it gets you playing records properly for less, and plenty of owners never need more. If your amp or receiver already has a phono input, you may not need to buy anything at all.

The case for a separate box

Headroom and flexibility. An external phono preamp dedicates its own power supply and circuit board to that delicate low-level job, away from the noise of a turntable's motor or an amplifier's other electronics — which is why a good one can lower the noise floor and sharpen detail. It also unlocks features built-ins rarely offer: adjustable gain, cartridge loading, a subsonic filter, and crucially moving-coil support for when you climb the cartridge ladder. The affordable ART DJ Pre II turns any line input into a turntable input for very little, while a step up like the Schiit Mani 2 adds multiple gain settings and MM/MC modes. Our best phono preamps guide lays out the ladder, and the Schiit Mani review shows what a dedicated stage adds.

When it's time to upgrade

You don't need to start with an external stage — you need to know when to add one. Reach for a separate box when you upgrade to a better or moving-coil cartridge that your built-in can't do justice, when you hear hum or a high noise floor you can't otherwise fix, or when the rest of your system has improved enough that the built-in preamp is the weak link. If hum is your specific problem, our turntable hum and grounding guide is the place to start, since a ground issue — not the preamp — is often the real culprit. Upgrade for a reason, not on reflex.

Cost and keeping the system balanced

It helps to keep the phono stage in proportion to the rest of the chain. A built-in preamp effectively costs nothing extra, which is exactly why it's the right call while your budget is going toward the deck, cartridge, and speakers that shape the sound more. When you do buy an external stage, match its cost to the system around it: a modest deck and a moving-magnet cartridge are well served by an affordable box, while a resolving deck and a moving-coil cartridge justify spending more. Overspending on a boutique phono stage ahead of the components that feed it is a classic misallocation. The good news is that this is one of the easiest upgrades to make later and in isolation — a single box between deck and amp — so there's no penalty for starting with the built-in stage and adding a separate one exactly when the rest of your system earns it.

Our take

For a first turntable, a built-in phono preamp is the pragmatic, money-saving choice — it plays records correctly, keeps the system simple, and is all many owners ever need. A deck like the AT-LP120X with a defeatable built-in stage is a smart starting point precisely because it leaves the door open. Move to an external phono stage when you have a reason: a better or moving-coil cartridge, a noise floor you want to lower, or a system that has outgrown its weakest link. Start with the affordable ART DJ Pre II or step up to the Schiit Mani when the rest of your chain is ready — the phono stage is easy to upgrade whenever the time comes.