Tony Moore's ribbons and Peerless 831857 Bass Units Photographs

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Wide-angle view of Tony Moore's ribbons and Peerless 831857 bass units in Bill's place with Bill (height 179cm or 5' 10 1/2") standing in between. Tony Moore's ribbon on the right has grill cloth over it. The ribbons open baffles are far too wide and will be replaced by solid Jarrah open baffles of the appropriate width and the ribbon raised up from the floor. The bass boxes will be veneered with Jarrah.

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Closer view of the left-hand ribbon and bass unit. The black bars across the ribbon are black plastic spacers for the ribbon aluminium frame with foam on the ribbon side. The black plastic spacer is some distance out from the front of the ribbon.

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Closeup of the front of the left-hand ribbon. Note that there are four strands of aluminium to the ribbon held together with an orangy yellow high temperature opaque tape. If you look closely you will notice that the ribbon is free at its edges excepting for where it is constrained by some plastic guides in the middle of the big patch of yellow tape. This constraining divides the ribbon into three sections and is done to save the ribbon from excessive movements with high signal levels.

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Back view of the left-hand ribbon.

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Closeup of the back of the left-hand ribbon. Note the magnets. Beside the magnets run the return wires. If you look closely again you will notice that the ribbon is free at its edges. At the bottom is a spacer/strengthener for the aluminium frame.

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Closeup of the back of the left-hand ribbon at the bottom. Note the soldering of the four aluminium strands of the ribbon to the copper wires beyond where the ribbon is clamped at the bottom.

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View of the well braced 160l box before finally adding the bottom and driver. Both the front and back walls are two sections of 25mm (1") thick MDF glued and screwed togther to give a thickness of 50mm (2"). Stuffing was added to the inner internal section in an effort to stop any internal standing waves. These boxes are very heavy as 6 large sheets of 25mm (1") thick MDF were used in the construction of the four boxes.

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Front view of the well braced 160l box before finally adding the bottom and driver to show how the holes in the internal bracing line up.

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The Peerless 831857 12" driver.


For suggestions, comments contact Bill Alford
Last modified 29 October 2001.