Free Shipping on US orders above $49

Pro-Ject  |  SKU: NEW-PRPWBS3PH-BLK  |  Barcode: 9120122292709

Pro-Ject Power Box S3 Phono Power Supply and Filter - Black

The Pro-Ject Power Box S3 Phono is a very efficient and flexible power supply and power filter for your Pro-Ject turntable and phono preamp.

✔ 60-Day Money-Back Guarantee — Try it risk-free for 60 days
✔ Free Shipping on orders over $49
✔ Financing Available — Pay over time | Learn more
✔ Price Guarantee — We match authorized dealer pricing | Details
✔ Expert Help — Call us at 800-942-0220 weekdays 9am–6pm EST

Regular price $249.00

Condition
Available in 39 days or less

Delivery and Shipping

  • Audio Advisor will ship products anywhere in the United States, including Alaska, Hawaii, and U.S. Territories.
  • For more information, visit our Delivery & Shipping Policies.

Step Up to Filtered Power for Better Turntable and Preamp Sound

Upgrade your Pro-Ject gear by stepping up to an affordable and highly effective power supply upgrade. The Pro-Ject Power Box S3 Phono is a very efficient and flexible power supply and power filter for your Pro-Ject turntable and phono preamp.

Here is why this is such an effective upgrade. By separating the power supply from the main component, noise and signal contamination are avoided. And it is no secret that clean, steady power contributes significantly to the sound quality of audio gear. It's a difference you can clearly hear.

An Instant Upgrade for Turntables and Phono Preamps

The Power Box S3 Phono has two DC power outputs that are specifically engineered to power Pro-Ject turntables (15V DC only!) and phono preamps (18V).* If you have a compatible turntable and/or preamp, you are in for a listening treat when you upgrade to this sophisticated, filtered power supply.

Sophisticated DC power filtration allows your turntable and preamp to perform their best. Expect greater speed stability from your turntable and a lower noise floor from your phono preamp, amounting heightened clarity and resolution in analog playback. The metal enclosure of the chassis helps block RFI/EMI for greater signal purity.

Reduce Power Cord Tangle, Too

In addition to the sonic improvements, Power Box S3 Phono has another benefit that may not be as significant as the audio upgrade, but it is a nice plus. The Power Box also helps with cable/PSU management by eliminating the need for turntable and phono preamp wall-wart power supplies. One less power cord can make a welcome difference.


*Note: This product is not compatible with Pro-Ject X8, Xtension 9, Xtension 10, Xtension 12, RPM 5, RPM 9, RPM 10 nor Signature Model turntables. For these turntables we recommend Power Box RS2 Phono or Power Box RS Uni TT power supply upgrades.

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

  • Free shipping

    On all US orders over $49

  • Special offers

    Regular sales and discounts

  • Easy returns

    Hassle free returns policy

Audio Advisor

Expert Help For Every Listening Journey

From choosing your first turntable to building a world-class hi-fi system, our audio specialists are here with honest advice, product guidance, and personalized support—backed by over 40 years of expertise.

Customer Reviews

{"statementLink":"","footerHtml":" ","consistentHelpData":[],"hideMobile":false,"hideTrigger":false,"disableBgProcess":false,"language":"en","position":"right","leadColor":"#146ff8","triggerColor":"#146ff8","triggerRadius":"50%","triggerPositionX":"right","triggerPositionY":"bottom","triggerIcon":"people","triggerSize":"medium","triggerOffsetX":20,"triggerOffsetY":40,"mobile":{"triggerSize":"small","triggerPositionX":"right","triggerPositionY":"bottom","triggerOffsetX":10,"triggerOffsetY":10,"triggerRadius":"50%"}}