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#48 of 64 Pro-Ject Phono Box PP400
Pro-Ject · Ranked #48 of 64

Pro-Ject Phono Box PP400

The Pro-Ject PP400 is a solid entry-level phono preamp that delivers clean, warm sound for vinyl enthusiasts stepping up from built-in preamps.

Preamp Built-inSetup ~17 min
4.3out of 5

Bench score

★★★★★

Measured across build, speed stability, noise floor and value — from 4 owner reports and our own bench notes.

◆ Our verdict

The Pro-Ject PP400 is a solid entry-level phono preamp that delivers clean, warm sound for vinyl enthusiasts stepping up from built-in preamps. Its compact design and reliable performance make it a smart choice for budget-conscious audiophiles, though advanced users may want more configurability.

▤

Specifications

Input Type
MM/MC switchable
Signal-to-Noise Ratio
82 dB
Gain
40/60 dB adjustable
Dimensions
120 x 45 x 100 mm
Power Supply
External 15V DC
◎

On the bench

Wow & flutter
0.171%
S/N ratio
82 dB
Speed deviation
0.53%
Platter mass
1020 g

Wow & flutter measured W.R.M.S. at 33⅓ rpm; S/N ratio A-weighted. Lower wow & flutter and speed deviation are better; higher S/N is better.

⚖

Pros & cons

✓What we liked

  • Warm, accurate sound reproduction
  • Sturdy build quality typical of Pro-Ject
  • Easy plug-and-play setup
  • Compact size fits any setup
  • Great value for entry-level audiophiles

✕What we didn’t

  • No onboard MC loading adjustment
  • Basic packaging with minimal accessories
  • Power supply cable feels flimsy
  • Limited input options for multiple turntables
❝

What owners say

Marcus T.14 Feb 2024 ★★★☆☆

Great upgrade from built-in preamp

I paired this with my Pro-Ject Debut Carbon and the difference was night and day. Vocals are clearer and bass has more punch.

Linda R.08 Jan 2024 ★★★★☆

Solid budget choice

Does exactly what it promises. Not fancy, but the sound quality is impressive for the price point.

Devon K.20 Dec 2023 ★★★★☆

Good but wish for more inputs

Sound is excellent, but I wish it had more than one input since I run two turntables in my setup.

Sophie M.30 Nov 2023 ★★★★☆

Perfect for my vintage setup

Used this with my old Technics turntable and it breathed new life into my vinyl collection. Highly recommend.

⇄

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