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 28 - Sep 2

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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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D Olson
Waukegan, US
★★★★★ 5
Keeps pet busy
Size: 1 Count (Pack of 16)
Must have for Busy Buddy Bones. Keeps them busy. Durable and must taste great. I keep these on my subscribe and save. I have never noticed any smell or mess with these, unlike some other rawhides.
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Reviewed in the United States on July 21, 2024
D
Verified Purchase
Donna Valentine-Jones
Phoenix, US
★★★★★ 5
PetSafe Busy Buddy Refill Ring Dog Treats
Size: 1 Count (Pack of 16)
Great! My Baby Pearl Anne loves them. And, she won't normally play with anything else. The Vet says it's due her being in a HORRIBLE Puppy Mill. She never had a puppyhood. She is still Neurotic, even after having been her parent for over 4 years. I would definitely like to get my hands on these people, if I knew who they were. She was found her on a VERY busy intersection way up north in the Texas town where I live. I don't normally go in this neighborhood, so I didn't see her on the street. My best friend, who died just 4 years ago on the 18th of March, had a ex coworker. Leslie(my best friend),KNEW I wanted a dog. I fell in love with her dog: a Miniature Schnauzer. One day Leslie's coworker called her. She said they had found a dog on the street. The coworker said that she couldn't keep anymore dogs. She has 3. So, when they described her, I knew I wanted her! She's a rare pure white Miniature Schnauzer. She was skinny, shaking, with horribly matted hair. She was scared to death, and freezing to death. I put her in a towel, and took her the Vet. And, she said she had worms, was dehydrated, and malnourished. not anymore. She's my baby, my child. Who is now spoiled to death. Sorry this is so long, but, I really needed to tell her story. Donna Valentine-Jones.
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Reviewed in the United States on March 24, 2015
J
Verified Purchase
Jenny
Port Orchard, US
★★★★★ 3
Sometimes they arrive chewy and great, other times stale and hard as a rock!
Size: 1 Count (Pack of 16)
My dog loves these added to her toys, but alot of time they arrive hard as a rock.
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Reviewed in the United States on December 26, 2025
K
Verified Purchase
Kindle Customer
Dallas, US
★★★★★ 5
Greatest Dog Toy Ever
Best toy for doggy. She gets worn out playing and so entertaining for us to watch.
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Reviewed in the United States on May 17, 2026
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Verified Purchase
Janet
Pawtucket, US
★★★★★ 1
Unsafe
This looked like a great idea for my energetic pup until I charged it and turned it on. It worked for maybe 3 minutes and she loved it while it was moving. It stopped suddenly and when I opened the Velcro to pull out the ball to check it, it was VERY warm. Unsafe for human or dog. For over $20 I would expect more for a dog toy. Cheap and non working! I will request a refund !
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Reviewed in the United States on February 17, 2026

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