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Pro-Ject Phono Box DS+

Phono preamplifier for moving magnet and moving coil cartridges (Black)

5 Reviews | 3 questions - 18 answers

Item # 252PBDSPB

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Our take on the Pro-Ject Phono Box DS+

This phono preamp is all about giving you choices. It provides a super-clean phono stage to boost output from your moving coil or moving magnet cartridge, then offers a handful of adjustable settings and filters that help you fine-tune the sound.

The bright, clear screen on the Pro-Ject Phono Box DS+ helps you choose settings that get premium sound out of any cartridge.

The bright, clear screen on the Pro-Ject Phono Box DS+ helps you choose settings that get premium sound out of any cartridge.

Clean phono equalization for your turntable system

This phono preamp is all about giving you choices. It provides a super-clean phono stage to boost output from your moving coil or moving magnet cartridge, then offers a handful of adjustable settings and filters that help you fine-tune the sound.

Audiophiles get pinpoint control over input impedance, capacitance, and gain, and there's a subsonic filter that can eliminate any low-end rumble, too.

Find the perfect match

When you use the Pro-Ject Phono Box DS+, you can choose the phono cartridge you prefer, and use the preamp's settings to get the most out of it.

For instance, our customers love the Pro-Ject Debut Carbon turntable, which comes with an Ortofon 2M Red moving magnet cartridge pre-mounted. Pro-Ject recommends that you set input impedance at 47k, input capacitance at 147p, and input gain at 40dB. The preamp's bright, clear screen shows you how to dial in your choices, so your records sound their absolute best.

Then, if you upgrade your system in the future, the DS+ is ready to match up with your next 'table and cartridge.

Need a cable?

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

Product Highlights:

  • compatible with moving magnet and moving coil phono cartridges
  • match preamp settings to your cartridge to get the best possible sound
  • vibration-resistant metal casing
  • bright, clear screen displays your settings
  • adjustable parameters:
    • input impedance: 10, 100, 1k or 47k ohms
    • input capacitance: 47, 147, 267 or 367 pF (picofarads)
    • input gain: 40, 45, 60 or 65 dB
    • subsonic filter on/off
  • retains settings while powered down
  • stereo RCA inputs and outputs
  • audiophile-grade linear RIAA equalization
  • RIAA response accuracy: ±0.3dB (20-20,000 Hz)
  • signal-to-noise ratio: 90dB
  • THD: < 0.005%
  • 4-1/16"W x 2-7/8"H x 6-3/16"D
  • weight: 2.25 lbs.
  • warranty: 2 years
  • Our 60-day money-back guarantee

What's in the Box:

  • Phono preamplifier (MM/MC)
  • AC power adapter (attached 5' DC cord)
  • 3 AC plug inserts (US/EU/UK)
  • Instructions For Use

Pro-Ject Phono Box DS+ Reviews

Average Customer Review(s):

(5 Reviews)
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Hands-on research

Product Research


Phono Preamp: The Pro-Ject Audio Systems Box DS+ is a very high-quality phono cartridge preamplifier. This precision phono preamplifier benefits from outstanding circuit technology from Dr. Sykora and uses high-quality components. All components, including polypropylene capacitors, are audiophile-grade and guarantee a breathtaking sound experience.

MM/MC Compatible: The Pro-Ject Box DS+ phono preamplifier offers amplifications and RIAA equalization for MM and MC cartridges.

Front-Panel Controls: The  Pro-Ject Box DS+ phono preamplifier's front-panel consists of a LCD screen and four push-buttons. The following settings can be adjusted from the front-panel.

  • Input Gain: The phono preamp's input gain can be adjusted to 40dB, 45dB, 50dB, or 60dB.
  • Input Impedance Adjustment: The is a variable input impedance adjustment can be set to 10, 100, 1k, or 47k ohms.
  • Input Capacitance Adjustment: Input capacitance can between 47pF, 147pF, 267pF, or 367pF.
  • Subsonic Filter: The Subsonic filter (-12dB @ 20Hz) can be turned on or off, and helps to reduce low-frequency rumble and wasted amplifier power.

Gold-Plated RCA Connections: The Pro-Ject Box DS+ is equipped with a pair of gold-plated RCA connections for the output stage and input stage. The gold-plate RCA connectors offer corrosion-free signal transfer.

Metal Case: The phono preamplifier features a metal case that shields the electronics from vibration and electromagnetic interference.

Power Requirements: The Pro-Ject Box DS+ turntable preamplifier operates off of standard household current using the included external power supply. The outboard power supply helps reduce noise and interference.

  • Input: 100-240V~50/60Hz, 0.4A
  • Output: 18V AC, 0.5A

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

I did some research and this phono amp meets my requirements. . [ RALPH  May 23, 2018 ]
I was looking for a phono preamp and this was available at a great price and the reviews are good, so I thought I would give it a try. [ Gary  May 21, 2018 ]
Needed an adjustable gain amplifier, liked that it had other features to adjust as well. [ D  Aug 25, 2017 ]

3 questions already asked

I have the Project Debut Carbon and I've used the Ortofon Red and Bronze cartridges and both sound great. I haveen't tried any moving coil cartridges but that is one thing that drew me to this preamp. It can accommodate both MM and MC cartridges and the settings are easy to change. [ Charles  May 05, 2018 ]
The preamp has is adjustable and I doubt there is a cartridge on the market that this preamp can't handle. It works great with my Shelter 501 cartridge, which has a very low output and wouldn't work with me two previous photo preamps. [ Robert  May 05, 2018 ]
When looking at a phono pre-amp, it's all about the cartridge and with the exception of connections, not about the turntable. Said differently, if your turntable has a low output moving-coil or moving-magnet type cartridge, you would consider a phono pre-amp. Particularly important when you do not have a dedicated phono input on your [whatever]. This particular pre-amp allows you to select from different levels of signal boost and cartridge loading values (impedance and capacitance) which will allow you to choose those settings you think sound best with your cartridge. [ EEWdad  May 04, 2018 ]
Any turntable that doesnt have a built in preamp. And then some of those can be bypassed for a better phonostage. It supports moving magnet and moving coil cartridges. [ roger  May 04, 2018 ]
Any turntable you like with a MM Cartridge. [ Douglas  May 04, 2018 ]
This will apply the standard phono cartridge response equalization and also work fine with moving magnet or both high and low output moving coil cartridges. It has nice selectable loading also to make it compatiable with most if not all moving coil cartridges. No reason to be picky on the turntable. Anything from a $100 turntable to a $3500 turntable. Usually people who pay over $3000 for a turntable and still need a tonearm for several hundred to several thousand dollars more plus a cartridge for $500 up will likely buy a "higher end" preamp I would think. Worth a try at least. Price is exceptionally good for the quality of this product. [ William  May 04, 2018 ]
I think any turntable that doesn't have a built amp will benefit. These are the selected settings, which should cover any cartridge you choose. Input impedance: 10, 100, 1K, 47 K In capacitance: 47p, 147p, 267p, 367p Input gain: 40dB. 45dB, 60dB, 65dB Subsonic filter; On or Off The [ Charles  May 04, 2018 ]
Dual CS-5000 with a Ortofon M2 Blue [ John  May 04, 2018 ]
Pretty much anything! Both moving coil and moving magnet cartridges are compatible. This unit is very programmable, so you just need to find the correct settings for your particular cartridge, and you're good to go. The only turntables that wouldn't work with this are ones that include a phono preamp (like certain tables with USB output). [ Scott  May 04, 2018 ]
the output should work on any auxiliary input on any receiver. Your Onkyo may however have a terminal marked phono which does not apply the needed gain nor the phono EQ required, just gives you a place to plug it in with an identity that will work with your remote or read phono on the front panel. . Read the manual. Very few AVR's have the gain in an input called phono to use it for phono. It may just be marked to accept the phono preamp output. Check the manual. If the manual says it requires a phono preap, then it should be ok to use with the phono preamp and is really just another auxiliary marked phono. [ William  May 04, 2018 ]
I believe you can use this preamp on any input EXCEPT phono. The Phono input has it's own preamp built into the receiver and only allows a low level signal [ Eric  Feb 25, 2018 ]
Any rca jacks but do NOT use phono if has them. This unit if for amplifying and correcting output from a record. Use aux or tuner or some other device in like even cd if you want. If you have a high output cartridge for playing records you do not need the Phono Box DS It does the correction and you do not want to do that twice! [ William  Feb 25, 2018 ]
My Onkyo TX SR805 has direct input for the output of a turntable. I use the Pro-Ject device to connect a Pioneer turntable. Sorry but don't know much about your Onkyo. But in any regard the Onkyo manual for your model should address your questions R/Jonathan [ JONATHAN A  Feb 25, 2018 ]
Any non phono input, regardless of how it's labeled. [ NELS  Feb 24, 2018 ]
Auxilary input would work fine. [ Douglas  Feb 24, 2018 ]
I'm not familiar with that particular receiver, but you can plug the output of the phono box to any line level input on the receiver. Looking at that receiver's info, I would use either the CD or the DVD input. Make sure to NOT use the phono input. [ Scott  Feb 24, 2018 ]
Connect to audio in jacks [1-6] Your choice. Just do not use the phono jacks! I love my DS+ ,hope you enjoy yours. Joe [ Josef  Feb 24, 2018 ]
the only thing I can suggest to you is thatypucant hook it up to your phono pre amp connection you would have to try an auxiliary outlet to hook up your amplifier and the project phono preamp but if you trying to run two turntables you would have to have more than one preamp and neither could be hooked in your phono pre amp I had the same problem with mine it was very noisy and made the record sound like it was damaged with a lot of clicking and popping so that it was un recognizable you would be better off hooking into your phono preamp alone or if you want two turntables I would suggest another phono pre amp that is made for that type of hook up so that you could hook up the turntables together the money you spend on the project phono would be better spent on another preamp with two hook ups for turntables that also has built in filters [ Phyllis  Dec 18, 2017 ]