| | 4QD Uni 4 - 12V Speed Controller
Uni series are Universal - Unidirectional - Unique controllers of unimpeachable reliability suitable for all the usual applications as well as some unusual ones! This controller is non-reversible.  $97.00 |
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| | 4QD Uni 4 - 36V Speed Controller
Uni series are Universal - Unidirectional - Unique controllers of unimpeachable reliability suitable for all the usual applications as well as some unusual ones! This controller is non-reversible. $108.00 |
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| | 4QD Uni 8 - 12V Speed Controller
Uni series are Universal - Unidirectional - Unique controllers of unimpeachable reliability suitable for all the usual applications as well as some unusual ones! This controller is non-reversible. $114.00 |
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| | 4QD Uni 8 - 24V Speed Controller
Uni series are Universal - Unidirectional - Unique controllers of unimpeachable reliability suitable for all the usual applications as well as some unusual ones! This controller is non-reversible. $114.00 |
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| | 4QD Uni 8 - 36V Speed Controller
Uni series are Universal - Unidirectional - Unique controllers of unimpeachable reliability suitable for all the usual applications as well as some unusual ones! This controller is non-reversible. $121.50 |
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| | 4QD PRO-150 Speed Controller
Probably the most user-friendly programmable motor controller available! The Pro-150 has a display and on-board sounder to make programming easy.  $385.00 |
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| | 4QD PRO-120 24V Speed Controller
Pro 120 Mark 2 is built on the success of the Pro controller. The circuits of these are so well proven and successful that no major design was possible, but the board has been re-laid using sub-miniature resistors to give room for more features. $310.00 |
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| | 4QD PRO-120 36V Speed Controller
Pro 120 Mark 2 is built on the success of the Pro controller. The circuits of these are so well proven and successful that no major design was possible, but the board has been re-laid using sub-miniature resistors to give room for more features. $320.00 |
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| | 4QD-200 48V Speed Controller
Designed to give currents in the range of 100 to 300 amps making them probably the most powerful controllers in their price range. $495.00 |
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| | 4QD-300 48V Speed Controller
Designed to give currents in the range 100 to 300 amps making them probably the most powerful controllers in their price range. $624.00 |
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