![large advent speaker large advent speaker](https://images.reverb.com/image/upload/s--sz2pXdVT--/f_auto,t_large/v1558381827/u2awsv79lel5roq43qte.jpg)
(For some reason, the maximum thickness is stated at 1", but the minimum thickness is not stated.) One of the Parts Express technicians measured a Dayton Heavy Duty Binding Post and found that the minimum thickness of the material in which the posts can be mounted is 3/8". The biggest challenge presented by either board material will be dealing with the binding posts, which seem to be made for installation in much thicker material. I am going to try the plastic sheeting, because removing a Masonite board from the cabinet for replacement or repairs would damage the board, whereas, the plastic board would probably remain intact. Another good choice might be plastic sheeting. It seems that one good choice would be to use the same 1/8" thick Masonite as was used in the original. I want to build a New Advent crossover network from scratch (without the 3-position switch) and I am still debating what material to use for the board. Parts Express is an excellent source for all crossover components, except for the crossover board.
![large advent speaker large advent speaker](https://community.klipsch.com/uploads/monthly_10_2013/post-11993-13819830176456.jpg)
The values of the resistors and capacitors are printed on the parts, but the values of the inductors are not. The meter arrived last Thursday and I was finally able to obtain the inductance value as well as the DC winding resistance of my New Advent crossover inductors. I chose the $94.65 (390-513), because the $54.11 (390-570) does not have the ability to measure resistance. Parts Express has two meters which measure inductance: Unfortunately, only more-expensive meters are able to measure the value of the crossover inductors. Most inexpensive meters have the ability to measure resistance and capacitance, however, while the less expensive meters may adequately measure resistance, they can fall short of delivering accurate capacitance readings. In order to adequately identify and test the various crossover components, you will need a good multi-meter. The original Advent crossover network was much more complicated than the one used in the New Advent system. It sounds like you have two variations of The Advent Loudspeaker, which preceded The New Advent Loudspeaker. BTW, the tweeter connected to the bad crossover checks out OK. Doug, thanks for your input on the other thread. Does anyone have some input on crossover construction, parts availability, sources, etc.? Thanks for all and any advice. As some have posted, keeping to the original component values would be the best way to go. I would suppose I will have to build two crossovers to achieve a perfect balance or should I try to duplicate the older, working crossover. Both speakers have the masonite ringed woofers and the orange "fried egg" tweeters. It seems as I have both the older style Large Advent with an inductor on the speaker back and a newer Advent with all components on the switch board. What I'm concerned about is the best manner of duplicating the original crossover network and if there are any tweaks to enhance the sound of my Large Advents. I started posting in a different thread about production years and construction differences and later found that one of my crossovers was not functioning.