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Pro-Ject Tube Box DS2 Vacuum tube phono preamplifier for moving magnet and moving coil cartridges (Silver)

Item # 252TBDS2SL

It lets you hear your vinyl with characteristic tube warmth and a spacious, inviting soundstage.

It lets you hear your vinyl with characteristic tube warmth and a spacious, inviting soundstage.

8 questions - 14 answers

Item # 252TBDS2SL

Ships free

Expected: 5/23/2024

Other options

About the Pro-Ject Tube Box DS2

Ned O.

Great sound from your favorite cartridge(s)

This vacuum tube phono preamp provides versatile options and settings for a wide range of phono cartridges — from moving magnet, to high- or low-output moving coil — so you can dial in the perfect sound for your system.

Great sound from your favorite cartridge(s)

This vacuum tube phono preamp provides versatile options and settings for a wide range of phono cartridges — from moving magnet, to high- or low-output moving coil — so you can dial in the perfect sound for your system.

Characteristic tube warmth for your vinyl

The characteristic warmth of vacuum tube output helps create an effortlessly inviting soundstage. Two pairs of gold-plated RCA inputs and two pairs of gold-plated RCA outputs let you keep both of your favorite rigs connected without having to change cables to switch between them.

Convenient adjustments

The DS2 features adjustable input capacitance settings for moving magnet and high-output moving coil cartridges, plus gain-adjustment options to fine tune for the best sound in any given configuration. A switchable subsonic filter protects your amplifier and speakers from power-wasting low-frequency rumble below 20 Hz.


Product highlights:

  • dual-mono design using two dual-triode ECC83 (12AX7A) vacuum tubes for optimal channel separation
  • compatible with moving magnet and moving coil phono cartridges
  • pre-mounted Cool Dampers reduce vacuum tube vibration for lower distortion and provide better heat dissipation for longer tube life
  • front-panel input impedance control for low output moving coil cartridges (continuously variable from 10-1000 ohms)
  • adjustable input capacitance and gain settings for more accurate cartridge matching
  • audiophile-grade polypropylene capacitors
  • subsonic filter reduces low-frequency rumble and wasted amplifier power (-12dB/octave at 20 Hz)
  • all-metal chassis for improved shielding from vibration and electromagnetic interference
  • two sets of gold-plated RCA connectors for corrosion-free signal transfer from two turntables
  • switchable loading: variable or 47k
  • capacitance settings: 100pF, 220pF, 320pF (for MM and high-output MC cartridges)
  • gain settings: 40dB, 45dB, 50dB, 60dB, and 65dB
  • RIAA response accuracy: 0.2dB (20-20,000 Hz)
  • THD: less than 0.04%
  • signal-to-noise ratio: 88 dB
  • 8-1/8"W x 3-5/8"H x 9"D
  • weight: 3.6 lbs.
  • warranty: 2 years
  • MFR # 9120071651732

Customer reviews for Pro-Ject Tube Box DS2

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5.0 out of 5 stars
15 reviews

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More details on the Pro-Ject Tube Box DS2

Stacey B.

Features & specs

Cartridge Type MM, MC
Subsonic Filter Yes
Cartridge Loading Variable
Adjustable Resistance Load Yes
Adjustable Capacitance Load Yes
Vacuum Tube Yes
RCA Inputs 2 Pair
XLR Inputs No
RCA Output 2 Pair
XLR Output No
USB Output No
3.5mm Output No
Optical Output No
Coaxial Output No
Signal-to-noise Ratio (MM) 88
Signal-to-noise Ratio (MC) 88

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Customer Q&A

8 questions already asked

Have the rt85 with ortofon blue. Emotiva ta1 pre amp. I hooked up the pro ject tube box ds2 to the aux on the ta1 and it sounds awful, distorted. Any suggestions? would appreciate.
patrick  Jan 12, 2024
1 answer
Greetings Partick. This would be technical support related. If you purchased the Tube Box from Crutchfield, feel free to contact our Tech Support team. They can walk you through the settings on the product and see if there may be a fix. Our toll-free Tech Support number is printed on your invoice, and is also available under the "My Orders" tab in the "My Account" section of our website. If you did not purchase the unit from Crutchfield, then you may want to contact Pro-Ject at 510-843-4500.
hogan  Jan 12, 2024 (Staff)
I see that it says that it's a dual mono preamp, does that mean it won't play back my records in stereo?
nick  Dec 26, 2022
1 answer
Yes you will certainly still be able to use that preamp on your turntable with vinyl is recorded in stereo. We have friendly advisors standing be able to go into details about this unit so please give us a call at 800.324.9695 and we can get you taken care of!
arielle  Dec 26, 2022 (Staff)
I don't see a place for grounding turntables. Are they grounded directly to preamp?
nelson  Sep 20, 2021
1 answer
The metal screw head in the upper left corner is the earthing wire (grounding wire) connection location per the manual
jason  Sep 22, 2021 (Staff)
If I hook up two turntables, I am assuming that coming out of this preamp I will need separate inputs (or two sets of inputs) in my main preamp.?
nelson  Sep 20, 2021
2 answers
The above answer is actually incorrect- I own one of these Tube Box DS2 phono stages and do in fact run 2 turntables into it. You only need one set of inputs on your preamp/integrated amp/receiver as the inputs on the phono stage are toggled via a front panel button. The second output is if you want to run the phono stage to 2 different systems. The outputs are also toggle selectable from the front panel. So in summery you can connect 2 tables (or tonearms) to one input on your system and toggle on the fly. It's incredibly user friendly and easy to use.
justin  May 06, 2022
Yes you will because each output on this unit is only linked to the input next to it. So it has two different outputs and will need two different inputs on your main preamp.
jason  Sep 22, 2021 (Staff)
It doesn't specifically say you can use two MM carts or two MC carts. Can I use two MM carts with this unit?
paul  Sep 05, 2021
5 answers
yes,you can use any combination. 2 mm's, 2 mc's, or 1mm and 1 mc. ,using the settings. the unit also saves these settings for each input. note; i'm getting this info from manual. i don't have 2 turntables, yet
steven  Sep 06, 2021
Yes, you can use two MM carts with this. You can hook up two turntables to this unit. It doesn't care whether the cartridges are MM or MC. You can choose which turntable by selecting the desired input. Your selected presets will be saved for MM-capacitance, gain and the 47k impedance setting. With MC the presets you select will be saved (gain is only relevant here) with the exception of the variable load setting. If you are using two MC carts this will need to be changed to suit whatever input you have selected for use. That should be the only adjustment made switching between two MC cartridges.
matt  Sep 06, 2021
Absolutely. You can use two carts or tone arms in any combination with this unit. It retains the settings for each of the two inputs. I have mixed and matched while experimenting with different configurations.
norman  Sep 05, 2021
Yes you can . I'm using a Fluance RT-81 and sounds amazing . What a difference!!!
neil  Sep 05, 2021
You can do either of the two. I am currently using two mc carts and have also used two mm's.
joel  Sep 05, 2021
Is there a sound quality difference between this and the original DS, or is it just the extra input and easier control of settings?
michael  Mar 08, 2021
1 answer
This DS2 has more settings that can be adjusted (gain, capacitance, etc..) to help improve its match with turntables which in turn helps improve the sound quality.
jason  Mar 22, 2021 (Staff)
Is there a warranty?
nathan  Sep 07, 2020
1 answer
I think there is a one or two year warranty on the Pro-ject tube box ds2 phono preamp.
richard  Sep 14, 2020
Is it conplicated getting the settings right for this pre-amp? I'm getting it for my Fluance RT85 turntable and Edifier S3000 pro active speakers
new user  Jun 13, 2020
2 answers
In general this is a very easy Pre AMp to set up. I don't use it with active speakers, but I imagine it's not that different. You would take the output of your RT85(ihave the same turntable) and plug that into the input(Right and Left) on this Pre amp. It has to ins and two outs so you can set up two turntables at once, but you just use the input 1 for both Right and Left. THen you take the Outputs and those go into your amp, which in this case would be your active speakers input. Ok if you already knew all of that, in terms of settings, it depends on your cartridge. So usually onj the RT85 you have either an Ortofon 2m Red, or 2m Blue. In the manual there is actually details as to which selections to use, and you wouldnt even use the dial because that is for MC carts, not MM like those two Ortofons. If you changed your cart, then you would just look up that cart online and it will tell you what setting to use. But it's as easy as pushing a button on this pre amp. Once you've done that I recommend letting the pre amp be on, for days, and you will see it gets better and better as it "burns in." That's it. I love this pre amp. Hope this helped. M.H.
michael c.  Jun 16, 2020
I didn't find it difficult to get the settings right. I based the initial settings for gain and load based on the cartridge manufacturer's specs. Then I tuned it manually by listening and making small adjustments. It was pretty easy and it sounds awesome.
robert  Jun 16, 2020

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