Guest One-Shot Scot Posted June 7, 2006 Report Share Posted June 7, 2006 The New Advent Loudspeaker came in four separate models: The A3, U3, A4 and U4. The A-series New Advents were Furniture models and the U-series Advents were Utility models. I currently have some of the A3, A4 and U4 models, but none of the U3 models.Here is what is stated on the back cover of the brochure entitled, _The New Advent Loudspeaker_:*** *** ***Cabinet ConstructionThe cabinet of the New Advent Loudspeaker is constructed of non-resonant particle board finished in genuine walnut veneer with a solid walnut front molding.The New Advent Loudspeaker is also available in a "Utility" cabinet on non-resonant particle board finished in walnut-grain vinyl.*** *** ***For a modest additional cost, the New Advent Loudspeaker buyer could choose to have a Furniture cabinet decorated with genuine walnut trim instead of a vinyl-clad Utility cabinet. Until recently, I assumed that outer cosmetics were the only differences between the Utility cabinets and the Furniture cabinets. I also assumed that the sonic characteristics of the Utility cabinet were identical to those of the Furniture cabinets. I was wrong.The overall construction of the A3 and A4 Furniture cabinets is not identical in the models that I have:The A3 cabinets have medium-grain particle board only on the front and back panels of the cabinet. Another type of real wood paneling -- possibly plywood -- was used for the top, bottom and side panels.The A4 cabinets are made entirely of fine-grain particleboard.The huge difference in cabinet construction is evident in the U4 models, which are made entirely of coarse-grain particleboard. The U4 cabinets also have two vertical baffles mounted on the center of the left and right cabinet walls, which measure 21" x 2" x 3/4". The A4 and A3 cabinets do not have these baffles.As an experiment, I lined up pairs of A3, A4 and U4 cabinets, all of which have had their grilles, crossovers, insulation, tweeters and woofers removed. Tapping on the tops of A3 and A4 cabinets produced similar sounds and they exhibited virtually no echo. However, tapping on the tops of the U4 cabinets produced a very noticeable hollow, ringing echo, which lasted for about half a second. In spite of Advent's claim to the contrary, the U4 is not made of "non-resonant" particle board. After hearing the unpleasant sonic characteristics of the U4 cabinets, I am inclined to believe that the vertical baffles were installed in an attempt to minimize the echo. I am assuming that the U3 cabinet is the same as the U4, but since I don't have one, I can't know for sure.Now, I am beginning to appreciate the value of the various sound-deadening materials offered in the Parts Express catalog. I am very interested in hearing from anyone who has dealt with speaker cabinet resonance, particularly in the U4 cabinet.The website below contains pictures of the interiors of the A3, A4 and U4 cabinets:http://home.comcast.net/~newadvent/NewAdventCabinets.htmlOne-Shot Scot Link to comment Share on other sites More sharing options...
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