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Pro-Ject Phono Box USB

Phono preamplifier for moving magnet and moving coil cartridges with USB output

8 Reviews | 3 questions - 10 answers

Item # 252PBUSDCB

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Our take on the Pro-Ject Phono Box USB

Wouldn't it be great to enjoy your record collection wherever you go? Pro-Ject's Phono Box USB makes it easy. This high-quality phono preamp features an analog-to-digital converter with USB output that connects your turntable directly to a computer.

High-performance vinyl playback with a digital twist

Wouldn't it be great to enjoy your record collection wherever you go? Pro-Ject's Phono Box USB makes it easy. This high-quality phono preamp features an analog-to-digital converter with USB output that connects your turntable directly to a computer.

You can record tunes to your computer as high-quality digital files, then load them onto your portable player or recordable CDs. The Phono Box USB also provides RCA outputs for plugging in to any of your receiver's line-level audio inputs to savor that warm, richly detailed sound of vinyl.

This phono preamp works with moving magnet and moving coil cartridges to handle virtually any turntable and cartridge combination.

Need a cable?

This phono preamp does not come with an RCA cable to connect to your receiver or amp.

Product Highlights:

  • USB port for connecting to a computer
    • Windows® and Mac® compatible
    • recording software not included (Pro-Ject recommends Audacity, a free sound recording and editing software program available at
  • compatible with moving magnet and moving coil phono cartridges
  • gold-plated RCA phono input
  • gold-plated RCA line-level output
  • built-in Burr Brown PCM2904 analog-to-digital converter
  • analog and digital outputs can be used simultaneously
  • energy-efficient external power supply for reduced noise and interference (less than 1 watt standby power)
  • RIAA response accuracy: < 0.5dB (20-20kHz)
  • THD: <0.01% (MM); <0.05% (MC)
  • signal-to-noise ratio: 86 dB (MM); 68 dB (MC)
  • 4-1/16"W x 1-7/16"H x 5-5/16"D
  • warranty: 2 years
  • Our 60-day money-back guarantee

What's in the Box:

  • Phono (MM/MC) pre-amplifier
  • AC power adapter (with attached 58" DC cord)
  • Instructions

Nice to be able to listen to vinyl again with a bonus of outputting through USB to my computer and then putting the tracks on iTunes. Sound quality is good and it is easy to set up. The USB output is a mini USB.

Anonymous, Greenwich, CT


Pro-Ject Phono Box USB Reviews

Average Customer Review(s):

(8 Reviews)
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Hands-on research

Product Research


Phono (MM/MC) Preamp: The Pro-Ject Phono Box USB allows you to connect a turntable with either a MM (moving magnet) or MC (moving coil) cartridge to today's home receiver's and amplifier which do not offer a dedicated phono input. There is a button on the back of the unit which allows you to switch between MM or MC mode.

Metal Case: The Phono Box USB's metal case shields the electronics from vibration and electromagnetic interference.

Dual-Mono Circuitry: The Phono Box USB provides optimal channel separation through dual-mono circuitry and low-noise ICs.

RIAA Equalization: The Pro-Ject Phono Box USB provides amplification and RIAA equalization for both MM and MC cartridges.

RCA Connections: The Phono Box USB features gold-plated stereo RCA connections. A stereo RCA input connects your turntable, and a stereo RCA output connects your home receiver or amplifier. RCA cables sold separately.

Ground Terminal: The Phono Box USB also has a turntable ground, in case your turntable has a separate ground lead. This provides shielding to the tone-arm and the sensitive circuitry in the turntable.

A/D Converter with USB Output: The Phono Box USB features a built-in A/D converter (Burr Brown PCM2904 16-Bit Delta Sigma) with a mini-USB (type-B) output to record your vinyl music to a Windows PC or Mac computer (USB cable not included). The unit supports sampling frequencies of 32, 44.1, and 48kHz. Your computer must have a suitable recording program installed (the Phono Box USB does not provide built-in recording software).

Note: Runs on Windows (XP/Vista/7) and Mac OS (operating systems). Automatic recognition, without additional driver, by standard PC.

Outboard Power Supply: The Pro-Ject Phono Box USB operates off of standard household AC current, using the supplied AC power adapter. The external power adapter is separate from the phono preamp to further improve sound quality.

  • Input: 100-240V~50/60Hz, 0.6A
  • Output: 15V - 500mA (18V)

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Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

to go with turntable [ John  Dec 22, 2016 ]
I selected this Pro-ject pre amp for the built in analog to digital converter with usb output. [ DONALD  Dec 14, 2016 ]
I've read Pro-Ject makes quality products and I needed a phono pre-amp with USB to connect turntable to computer. [ Lyle  May 14, 2016 ]
I collect phono pre amps and needed this one for my collection. [ Michael  Dec 12, 2015 ]

3 questions already asked

I do not have to adust the volume. You probably need to press the cartridge selection button in the back of your preamp. I noticed the the factory setting was wrong for my cartridge and the output was low. Good luck. [ KEN  May 12, 2017 ]
I haven't noticed that. I think the volume is the same for all the components on my audio/video setup and it isn't anything fancy. [ ANDREW M  May 12, 2017 ]
Not that I have noticed we run ours through a Rotel system and seems to be at the same volume as blutooth, TV or other inputs. [ Hudson46  May 12, 2017 ]
As long as your favorite software (or app) you want to use runs on Windows 8, Pro-Ject will be be happy with your new laptop and W8. [ Marinos  Apr 19, 2015 ]
It is compatible with any computer. All you need to do is download a program like Audacity. [ Winston  Apr 14, 2015 ]
It depends on whose recording software you're using. I'm using VinylStudio (nice program) on Windows 7, though they claim compatibility also with Win 8. alpinesoft DOT co DOT uk [ Robert  Apr 14, 2015 ]
We use our unit with an Apple Laptop and it works just fine. Have not used it with Windows 8. Seems like a quality unit though. [ Thomas  Apr 14, 2015 ]
If I understand your question correctly, you want to connect the USB out on your PC and send the signal to an amplifier for driving speakers. No that won't work because the USB is a digital signal. Amplifiers and speakers require an analog signal. Also, the USB port on the Pro-Ject Phono box is an output. The PhonoBox takes the unamplified analog signal from the phonograph and digitizes it and sends it to the USB port as digital signal your PC can read. You can't do this process in reverse by sending a digitized signal to the PhonoBox through it's USB port. Hope that answers your question. [ Rob  Dec 15, 2014 ]
Not sure if i understand your question. Pro-Ject Phono Box USB is a pre-amp for connection between turntable and amplifier, or output to computer's USB port should you wish to digitize analog LPs (works very well with Vinyl Studio's software). Re: computer connection to stereo: I have a Pro-Ject Receiver Box S, and simply run a 3.5mm mini plug from computer's audio output into input 2 on back of receiver. An option is to get a 3.5mm Mini Plug to RCA cable, and run to the typical 2 RCA inputs on rear of receiver. [ Robert  Dec 14, 2014 ]
It seems your question is confusing and is not about this product and its intended use. Please resubmit your question in a clear and concise format and I will do my best to give you an honest response. [ Winston  Dec 14, 2014 ]

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