PRO-JECT Project Speed Box S Turntable Speed Controller – Can Play Deep Purple Infinite(ly)

Was very happy to get this straight after ordering, as another supplier had messed me around for weeks with ‘supply issues’. Very tidy little unit, but about 2mm too tall to fit underneath an rpm 5. That’s probably not the best idea, but lots of people seem to shove their earlier models into that gap. 1 is the mains switch, a stiff rocker switch mounted underneath. As my deck is on glass (for the time being) it would slide around as you fumbled with the switch, so you had to steady the back of the deck with your other hand to stop this. As this latest speedbox boasts a standby button, you need never touch the rocker switch againwhile changing speed manually with the oem belt (very loose) was trivial, with the upgraded s/e belt (very tight) you would definitely benefit from electronic speed control.

Debut carbon: this unit is not compatible. . Please note , despite an answer in q&a to the contrary, this does not work with debut carbon models, only on turntables with plug in mains sockets and a 16v ac power supply.

Reassuringly heavy little unit. Very convenient for speed change. However i bought this for the sound quality improvement and boy what a difference. Up until now, my turntable had always been the weak element of my hi-fi system. Suddenly you can hear all the space around the instruments and the depth of voices. This is simply the best upgrade i’ve ever made (and i’m a bit of a cable upgrade freak). Here are the specifications for the PRO-JECT Project Speed Box S Turntable Speed Controller:

  • Enter your model number
    to make sure this fits.
  • Quartz-generated high precision electronic speed regulation with microprocessor control
  • Suitable for all turntables with 16 volt AC motor, up to 3 watts max. power consumption
  • Sound improvement through motor running smoothness
  • Clean power decoupled from mains interference
  • Allows electronic speed change 33 & 45 rpm

Not compatible with debut carbon as far as i can see. . I was about to click ‘buy’ when i thought i would download and read the manual for the speedy box s first. It says ‘* all juke box, elemental and debut carbon models, all phono and phono/usb models, all models with automatic switch-off (like debut iii e) and electronic speed change (like debut carbon esprit sb, rpm 6. 1 sb, xpression iii comfort, xperience comfort), xtension (all models) and signature may not be used with the speed box s. ‘. This contradicts the answer to one of the questions posted for this item. Inspection of my own debut carbon shows no way of connecting the speed box s. If someone can authoritatively explain how it might be possible i will gladly revise this review, but in the meantime i hope this is of use to other dc owners.

High quality product which makes speed changes effortless. The speed box is of high quality appearance and feel. It was extremely easy to connect to my system, just swapping it for the existing supply and i can now change between 33rpm and 45rpm a the touch of a button.

Reviews from purchasers :

  • Simply astonishing
  • High quality product which makes speed changes effortless
  • Why did I wait so long?

This controls the speed on my debut iii, and is a great addition. Saves taking the platter off and faffing about with the drive belt. Well built and tidy looking. Connection is a doddle, simply remove your power supply from your turntable, and using the power socket and the (short, about 10 cm) lead provided, connect your turntable to the phonobox, which has it’s own power supply. The phonobox can’t be used with turntables that have a fixed power supply ( i think). A small button on the front controls the speed (33. 3, 45 and (with caveats) 78 rpm. It might also be worth mentioning that these units are described as black, but they seem to me to be more matt gunmetal grey, and the indicator light is a tiny funky blue one.

Reassuringly heavy little unit. Very convenient for speed change. However i bought this for the sound quality improvement and boy what a difference. Up until now, my turntable had always been the weak element of my hi-fi system. Suddenly you can hear all the space around the instruments and the depth of voices. This is simply the best upgrade i’ve ever made (and i’m a bit of a cable upgrade freak).

Yes i like this – hard to tell if really does condition your electricity supply in a way that’s audible but my record player sounds great right now. This unit is really tiny and does indeed fit under my turntable (project xperience perspex one) beautifully – it is really convenient not having to change the speed manually. Yes this is a cool little box the only thing i’d improve is that it automatically defaults to 33rpm so if you’re having a 7in session you have to change the box to 45 each time – not a major inconvenience but would be nice if reverted to the last speed you chose.

Debut carbon: this unit is not compatible. . Please note , despite an answer in q&a to the contrary, this does not work with debut carbon models, only on turntables with plug in mains sockets and a 16v ac power supply.

Bought for the project debut carbon – mine was bought in 2017 but it seems the silver cartridge version has the old pre-2012 16v ac motor. This makes a big difference to the sound, tightening up the bass, and no more removing the platter to change the speed. Add to this the acrylic platter and updated motor mounts (two rubber washers and a flat washer) and it’s a real winner.

Not compatible with debut carbon as far as i can see. . I was about to click ‘buy’ when i thought i would download and read the manual for the speedy box s first. It says ‘* all juke box, elemental and debut carbon models, all phono and phono/usb models, all models with automatic switch-off (like debut iii e) and electronic speed change (like debut carbon esprit sb, rpm 6. 1 sb, xpression iii comfort, xperience comfort), xtension (all models) and signature may not be used with the speed box s. ‘. This contradicts the answer to one of the questions posted for this item. Inspection of my own debut carbon shows no way of connecting the speed box s. If someone can authoritatively explain how it might be possible i will gladly revise this review, but in the meantime i hope this is of use to other dc owners.

This controls the speed on my debut iii, and is a great addition. Saves taking the platter off and faffing about with the drive belt. Well built and tidy looking. Connection is a doddle, simply remove your power supply from your turntable, and using the power socket and the (short, about 10 cm) lead provided, connect your turntable to the phonobox, which has it’s own power supply. The phonobox can’t be used with turntables that have a fixed power supply ( i think). A small button on the front controls the speed (33. 3, 45 and (with caveats) 78 rpm. It might also be worth mentioning that these units are described as black, but they seem to me to be more matt gunmetal grey, and the indicator light is a tiny funky blue one.

Can play deep purple infinite(ly). Got to the point where removing the platter to play 45’s meant i no longer played them. Along came dp’s new album, which is cut at 45, so thought i’d invest in one of these. It may be me but adding this device has improved the sound across the board. It’s difficult to quantify but listening to power windows by rush, neil peart’s drums sounded that bit sharper. It’s breathed new life into my old xpression deck so worth the money for me.

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1 Comment

  1. Not compatible with debut carbon as far as i can see. . I was about to click ‘buy’ when i thought i would download and read the manual for the speedy box s first. It says “* all juke box, elemental and debut carbon models, all phono and phono/usb models, all models with automatic switch-off (like debut iii e) and electronic speed change (like debut carbon esprit sb, rpm 6. 1 sb, xpression iii comfort, xperience comfort), xtension (all models) and signature may not be used with the speed box s. “. This contradicts the answer to one of the questions posted for this item. Inspection of my own debut carbon shows no way of connecting the speed box s. If someone can authoritatively explain how it might be possible i will gladly revise this review, but in the meantime i hope this is of use to other dc owners.
    1. Not compatible with debut carbon as far as i can see. . I was about to click ‘buy’ when i thought i would download and read the manual for the speedy box s first. It says “* all juke box, elemental and debut carbon models, all phono and phono/usb models, all models with automatic switch-off (like debut iii e) and electronic speed change (like debut carbon esprit sb, rpm 6. 1 sb, xpression iii comfort, xperience comfort), xtension (all models) and signature may not be used with the speed box s. “. This contradicts the answer to one of the questions posted for this item. Inspection of my own debut carbon shows no way of connecting the speed box s. If someone can authoritatively explain how it might be possible i will gladly revise this review, but in the meantime i hope this is of use to other dc owners.
  2. This review is from : Project Speed Box S Turntable Speed Controller (Black)

    Was very happy to get this straight after ordering, as another supplier had messed me around for weeks with “supply issues”. Very tidy little unit, but about 2mm too tall to fit underneath an rpm 5. That’s probably not the best idea, but lots of people seem to shove their earlier models into that gap. 1 is the mains switch, a stiff rocker switch mounted underneath. As my deck is on glass (for the time being) it would slide around as you fumbled with the switch, so you had to steady the back of the deck with your other hand to stop this. As this latest speedbox boasts a standby button, you need never touch the rocker switch againwhile changing speed manually with the oem belt (very loose) was trivial, with the upgraded s/e belt (very tight) you would definitely benefit from electronic speed control.
    1. Was very happy to get this straight after ordering, as another supplier had messed me around for weeks with “supply issues”. Very tidy little unit, but about 2mm too tall to fit underneath an rpm 5. That’s probably not the best idea, but lots of people seem to shove their earlier models into that gap. 1 is the mains switch, a stiff rocker switch mounted underneath. As my deck is on glass (for the time being) it would slide around as you fumbled with the switch, so you had to steady the back of the deck with your other hand to stop this. As this latest speedbox boasts a standby button, you need never touch the rocker switch againwhile changing speed manually with the oem belt (very loose) was trivial, with the upgraded s/e belt (very tight) you would definitely benefit from electronic speed control.