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Pro-Ject Phono Box RS - With Power Box RS Outboard Battery Based Power Supply - Complete Set

Sale price$0.00
Free Shipping on *ALL* Electronics (Excluding Speakers, Contiguous 48 US States Only)

Pickup currently unavailable at SkyFi 479

Pro-Ject Phono Box Rs - With Power Outboard Battery Based Supply Complete Set Preamplifier

Pro-Ject Phono Box RS - With Power Box RS Outboard Battery Based Power Supply - Complete Set

SkyFi 479

Pickup currently unavailable

479 South Broad Street
Glen Rock NJ 07452
United States


This listing is for a complete set that sold for around $1300 not all that long ago.

More from Pro-Ject on the Phono Box RS:

Reference class phono preamplifier with unique impedance control

This ultra low noise and distortion preamplifier is made for the audio conniosseur and offers not only breathtaking performance but is capable to adapt to virtually any phono cartridge through variable impedance control. Impedance adjustment can be done while playback! Due to use of best parts, like SSM2019 from Analog Devices as input stages and Linear Technology LT1010 as high current buffer stage, Phono Box RS delivers ultra low levels of distortion and noise. Its very low output impedance makes it insensitive to selection of interconnect cables and lenghts.

Fully passive RIAA and DECCA equalisation is selectable. Phono Box RS offers fully balanced circuitry and both XLR and RCA inputs and outputs. All in all vinyl playback will never have sounded as clear, detailed and smooth, than with this superlative phono stage!

Phono Box RS Features:
• MM & MC capable
• True dual mono design
• Balanced XLR & unbalanced RCA In & Outputs
• Fully passive RIAA & DECCA equalisation
• Unique continously variable input impedance loading, matches every cartridge (adjustment even while playing)
• RCA & XLR In & Out
• Superior low noise / low distortion
• Classy & elegant dip switches
• DC power supply (< 1 watt standby power)
• Metal casing protects against vibration and interference

Technical Specifications:

Input impedance:
Fixed: 10 Ohms or 47kOhms,
Variable: 10 - 1200 Ohms

Load capacity switchable:
100pF, 200pF, 300pF, 420pF, 520pF

Output impedance: 
50 Ohms

Gain, MM / MC: 
RCA: 40, 50, 60 dB
XLR: 46, 56, 66 dB

Signal to noise ratio: 
91 dBA


RIAA accuracy:
within 0.3dB/20Hz - 20kHz

20Hz / - 12 dB



Power supply: 
2 x 18V/300mA DC; 220 - 240V, 50Hz

Power consumption:
150mA DC < 1 watt standby

Dimensions W x H x D (with sockets)
8.1" x 2.8" x 8.3" (206 x 72 x 210 mm)

4.48 lbs. (2030 g) without power supply

More from Pro-Ject on the Power Box RS:

Power Box RS Phono: Reach the ultimate level in phono sound!

We at Pro-Ject Audio Systems strongly believe that a power supply is a very important part of the audio path and significantly contributes to the sonic quality of an audio product. In order to offer a maximum in sound quality and optimum isolation of the phono preamplifier from mains interferences, we designed the Power Box RS Phono with battery power output. Pure and clean energy is very important everywhere where low level signals are amplified. A turntable cartridge deliveres the lowest signal level from all the known sources of audio signal. Typical level of a low output MC cartridge is about 0.2mV = 0.0002V. Such low level signal is very vulnerable against all kinds of interferences and noise.

How does it work?

When Power Box RS Phono is connected to Phono Box RS and switched ON, only the accus are connected (adapter and charger are physically disconnected) so Phono Box RS is completely isolated from mains interferences. When accu voltage decreases and reaches certain limits, further playback will be a danger for status of the battery, the charger is automatically connected. This status is indicated by LED on the front panel. Everything continues without any limitation and playback is possible, but the advantage of completely isolating for the charging period is lost. Even if the biggest advantage is temporarily not available, the battery now works as very big filtration bank and the sound is still far better than in case of using the standard power adapter. When accu is fully charged, the charger is disconnected and again Power Box RS Phono powers Phono Box RS only from accu packs.

• Purest & cleanest power for Phono Box RS
• Fully isolates Phono Box RS from mains interference and noise while playback
• Advanced Lithium Polymer battery (one for each channel)
• Playback time approximately 4 hours
• Charging time approximately 4 hours
• Optimised battery life due to intelligent micro-processor controlled charging electronics
• Status indicator LEDs on front

Technical Specifications:

Output voltage:
from +/-14.8V to +/-16.8V
depends on battery charge level

Battery type and capacity:
Volts Li-ion, 2000 mAh

Charging time:
Approx. 4 hours
(longer when Phono Box RS in use)

Battery playing time:
Approx. 4 hours

Outboard power supply:
20V/3000 mA DC
Suitable for your country's mains supply

Dimensions W x H x D:
7.9" x 2.8" x 7.7" (201 x 72 x 195mm)

4.48 lbs. (2030 g) without power supply

Click here for a PDF copy of the Pro-Ject Phono Box RS Owner's Manual

Click here for a PDF copy of the Pro-Ject Power Box RS Owner's Manual 

Please click here for detailed specifics regarding our specialized packing process that separates us from the rest.



Original Box







Yes - Power

Physical Condition


Working Condition


SKU: 101014