SKU: 13491238950

Pro-Ject Phono Box RS2 True Balanced Phono Preamplifier

Sale price$1259.55 Regular price$1399.50
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Ships within 48 hours · Estimated delivery Aug 7 - Aug 12

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Description

Pro-Ject Phono Box RS2 True Balanced Phono PreamplifierReference class phono preamplifier with unique impedance control The Phono Box RS2 is the ultimate phono preamplifier of the highest class. It is fully balanced from the input to the output. Electronics are fully discrete, no op amps are in use and it uses split passive RIAA and DECCA equalisation. Discrete Circuitry A discrete circuit is composed of electronic components which are disparate, individual devices, also called discrete components. These

Reference class phono preamplifier with unique impedance control

The Phono Box RS2 is the ultimate phono preamplifier of the highest class. It is fully balanced from the input to the output. Electronics are fully discrete, no op-amps are in use and it uses split passive RIAA and DECCA equalisation.

Discrete Circuitry

A discrete circuit is composed of electronic components which are disparate, individual devices, also called discrete components. These can be “passive” components, like resistors, capacitors and inductors, as well as “active” components, which in our case are transistors. The opposite to this would be an integrated circuit, which uses operational amplifiers (Op-Amps) in the signal chain. Countless hours of listening tests and years of experience have shown us that even the very best Op-Amps do not tend to be so neutral, natural, dynamic or vivid. Standard phono pre-amplifiers with integrated circuits have a few tens or hundreds of components, but discrete designs will employ hundreds or thousands of components by comparison. That makes for an extended and more costly design process, but results in the best sound for your money.

Fully Balanced

The Phono Box RS2 employs a true fully balanced design principle. Balanced transmissions consist of a hot and a cold (also called + and -) signal. Both the + and – signal chains effectively carry the same musical information. A true balanced amplifier can now extract the final musical information out the +/- signals and subtract, remove, all noise that could potentially be added along the transmission. In a true, fully balanced amplifier, like the Phono Box RS2, the + and – sections of both the left and right channel are treated individually, which doubles the amplifier sections by 2 as a result.

Split passive EQ

The Phono Box RS2 uses split passive equalization for both of its RIAA and DECA curves. This is more costly to design and implement but ensures the most accurate representation of the ideal EQ curve. Split passive equalization allows for better impedance matching and lower deviation from the ideal RIAA or DECA curve.

Extreme cartridge loading options

No other phono-preamp in the world has such fine options of setting the gain like the Phono Box RS2. Very large ranges from 40dB (voltage amplification by 100x) up to 70dB (voltage amplification by 3690x) are possible.

Load impedance can be set continuously via potentiometer, a system invented by Pro-Ject Audio Systems. It allows you to seamlessly adjust the impedance during playback and immediately assess the impact of different loading options.

Cartridges, by nature, suffer from small imbalances between the left and right channels. To correct this the Phono Box RS2 introduces a new feature that is absolutely rare in this price category. A potentiometer allows you to adjust the exact center of the sound stage in ranges of 2dB to the left or right.

Steel/aluminium chassis

The Phono Box RS2 has a steel chassis which is covered by screwed aluminium panels. This construction brings very good rigidity and splendid isolation against interferences.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 13491238950

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Verified Purchase
Calling Home
Whiting, US
★★★★★ 4
The Stand Is the Unexpected Favorite
Color: Gray
I use this at my morning coffee station for mixing powdered supplements into my coffee shake — more than one goes in and it handles them without complaint. For a small battery-operated device it has real power. Cleans easily. The foam quality is good for home lattes without any particular technique required. But my favorite part is, unexpectedly, the stand. It’s sturdy and well made and gives me somewhere sensible to set a dripping frother instead of it lying on the counter. A small thing that earns its counter space.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026
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Verified Purchase
Linda M
Whiting, US
★★★★★ 5
Perfect frother
Color: Glossy Black
Absolutely love my frother. I'm actually impressed. This frother definitely makes a bigger better frothed milk. I use this frother multiple times a day and have been so pleased with the battery life. Easy and quick to charge. Love the reliability of this little gadget
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Reviewed in the United States on June 9, 2026
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Verified Purchase
C Dixon
Charlottesville, US
★★★★★ 5
Pretty and works well
Color: Gray, Color: Gray
Love this and the stand it comes on. I’ve used it to mix everything from creatine, coffee creamer, and even pudding
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Reviewed in the United States on June 2, 2026
M
Verified Purchase
Michelle S.
Grantham, US
★★★★★ 5
This is the one!
Color: Gray
I ended up going with another brand, which I returned because it was impossible to insert the batteries into the too-tight compartment (other reviewers had the same issue and I should have listened). So I bought this one and not only is the battery compartment ample size and easy to insert the batteries into, the company even sends you two AA batteries to start you off! I also very much appreciate the fact that you don't have to hold down the button, just push it once to start and push it again to stop. It's powerful and I love that it sits in its own stand and looks nice in my kitchen while doing so.
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Reviewed in the United States on May 29, 2026
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Verified Purchase
Elaine
Massapequa, US
★★★★★ 5
Great quality, great price and works great !
Color: Flat Black
Works great ! Quick delivery and great price and I love that it comes with a cover !
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Reviewed in the United States on June 5, 2026

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