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Pro-Ject Speed Box II

Electronic speed control for Pro-Ject turntables

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  • Pro-Ject Speed Box II

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  • Pro-Ject Speed Box II

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  • Pro-Ject Speed Box II
  • Pro-Ject Speed Box II

Item# 252SBIIB offer details

Item# 252SBIIB

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Pro-Ject

Our take on the Pro-Ject Speed Box II

by Dave Bar

If you own a Pro-Ject turntable, this little black box is a must have. First, it lets you change speeds between 33-1/3 and 45 rpm with just the touch of a button — no need to manually move the belt. But what really impressed us is the way it stabilizes the record platter's rotation speed. Even slight speed fluctuations can detract from the magic of vinyl sound, but with the Speed Box II in place, your records will spin with greater speed accuracy and rock-steady consistency. When we plugged it in to one of our Pro-Ject RM 1.3 turntables, we immediately heard tighter, more defined bass. Vocals sounded fuller, with added "body" and presence, lending a greater sense of sonic realism. Pitch accuracy for instruments with long decay times, such as piano, was spot on. Overall, the music seemed to flow just a little easier from a quieter background.

The Speed Box II makes an easy and cost-effective upgrade. Simply plug it into your turntable's AC jack, then connect it to power with the supplied transformer. That's all it takes to enjoy enhanced performance and convenience.

See more info on this item

Highlights:

  • compatible with turntables that use Pro-Ject's 16 Volt AC power supply, including the Debut, xPression III, and RM models
  • provides electronic speed change between 33-1/3 and 45 rpm playback
  • quartz-generated high-precision electronic speed regulation
  • small size allows placement near turntable
  • metal case shields circuitry from vibration and electromagnetic interference
  • LED speed indicators
  • microprocessor control of all functions
  • external power supply reduces chance of noise and interference
  • 14" DC cord connects to Pro-Ject turntable
  • weight: 20 ounces
  • 4"W x 1-1/2"H x 4-1/2"D
  • warranty: 2 years
  • Our 60-day money-back guarantee
Shop all Pro-Ject Phono Cartridges & Accessories
     

    Hands-on research from the Crutchfield Labs (what are the Labs?)

    What’s in the box? | In-depth notes

    Product Research

    Product Research
    What's in the box?

    Download owner's manual

    • Electronic turntable speed-change (33/45 rpm) unit with attached 14" DC cord
    • AC power adapter (with attached 6' DC cord)
    • Instructions

    Our Product Research Team

    At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

    Features

    Overview: The Pro-Ject Speed Box II permits electronic speed change of select Pro-Ject turntables (that do not have built-in electronic speed change) between 33 and 45 rpm.

    Note: Only Pro-Ject turntable models with main socket power supply of 16V/19mA AC (max.) are compatible.

    Metal Casing: The unit's metal case shields the electronics from vibration and electromagnetic interference.

    Electronic Speed Regulation: The Pro-Ject Speed Box II utilizes Quartz-generated high precision electronic speed regulation and filter circuits to provide speed stability. All functions are microprocessor controlled.

    Dual Speeds: The Speed Box II performs speed change by the push of a button between 33 and 45 rpm.

    Connections: The Speed Box II features an attached 14" DC cord which replaces your Pro-Ject turntable's existing power supply. The included AC adapter of the Speed Box II then plugs into the back of the Speed Box II and into AC wall outlet.

    Specifications:

    • Speed Change: 33 and 45 rpm
    • Power Output: 16V/190mA AC (+/-3%)
    • Outboard Power Supply: 16V/500mA AC
    • Quartz Oscillator: Speed stability 0.001%
     

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    Reviews for the Pro-Ject Speed Box II

    Average Customer Review:

    4 people say:

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    5 out of 5

    Pro-Ject Speed Box II

    Written By Anonymous, Irmo, SC on Thursday, October 04, 2012
    Crutchfield Customer Review (What's this?)
     
    This certainly makes a difference to the sound quality of your Pro-Ject turntable. Very easy to hook up. The instructions state that the power cord that comes with this replaces the power cord to your turntable, so I did change it out, but I don't think it is necessary. The cable from the turntable to the Speed Box is 14", not 18", but that did not really matter, although the extra 4" would have allowed it to be placed where I originally wanted to. The blue light is extremely bright, especially if your room is dark. You now use the button on the Speed Box to turn the turntable on. Switching speeds is a plus. Turntable is definitely quieter in 33, but there is a little hum in 45. Not noticeable, and I play more 33s so I rarely hear it. I highly recommend this product.
    Pros:
    Increased sound quality. Speed change. Quiets 33 operation.
    Cons:
    Cord still needs to be a little longer. Not as long as stated in the Crutchfiield discription, which is 18'. It is actually 14". Initial price seems high, but really, once you get it, you see why it is costly. I don't see why the light is so bright, but if that is all I can really find to complain about, that says a good deal.
    1 out of 1 people found this helpful
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    4 out of 5

    Great tweak for the price

    Written By VinceC, Charlotte, NC on Monday, November 21, 2011
    Crutchfield Customer Review (What's this?)
     
    Certainly a great improvement to the sound of your Project turntable. The clean power seems not only to stabilize the speed, but also seems to quiet the motor. Essentially it cleans the sound; backgrounds are quieter, highs are cleaner, lows are cleaner. The small size is a plus.
    Pros:
    Small size, improved sound
    Cons:
    The cable from the SpeedBox to the motor is a little short limiting placement options.
    2 out of 2 people found this helpful
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    2 out of 5

    Serious Design Flaw

    Written By Karl H, Provo, Utah on Thursday, June 16, 2011
    Crutchfield Customer Review (What's this?)
     
    The speed box works as advertised and works well at changing speeds and maintaining accurate speed. However, one thing that Pro-ject did in the design is quite unbelievable - they made the cord that plugs into your turntable's motor - only 1 FOOT LONG! Seriously? This means that the box has to go literally right next to your turntable. I own the Pro-Ject RM 1.3 turntable and it is obviously a work of art that is really meant to sit alone on its own table or shelf. Putting the speed box next to it just looks ridiculous. So now I've got to order an extension cord for the cable that goes to the motor. Found one on another website. Just ridiculous that for this price they couldn't give you 3 feet of cable so that you could put the box on the shelf below the turntable.
    5 out of 14 people found this helpful
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    5 out of 5

    It's worth the purchase

    Written By Glen, New York, NY on Wednesday, April 13, 2011
    Crutchfield Customer Review (What's this?)
     
    Most people that are purchasing this will probably consider the convenient
    change in speed as the primary purpose. For me and considering all the other
    reviews, speed is a secondary benefit. The primary benefit is the better sound
    quality from this external power supply. For a small box, its got a bit of weight.
    It fits conveniently under my pro-ject xpression iii and is easy to set up. There
    are enough professional reviews extolling the virtues of getting this upgrade for
    you to read and they are all correct. I'm just saying as a normal guy that likes
    playing records, that this is the real deal and this should be part of your pro-ject
    turntable.
    7 out of 7 people found this helpful
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    1-4 of 4

    For a more in-depth review and enhanced detailed information on the Pro-Ject Speed Box II, please visit the Crutchfield website product page (/S-MDTOnV5mlar/p_252SBIIB/Pro-Ject-Speed-Box-II.html ).

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      Pro-Ject Speed Box II

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      Pro-Ject Speed Box II