longdrive03 Posted March 14, 2017 Share Posted March 14, 2017 A friend of mine bought a group of speakers including two RC7 center channels in black paint. I am building new cabinets and arranging the woofers and tweeter in a WWT alignment with the top woofer crossed over at the higher crossover point. The cabinet is a little larger (32" H x 11" W x 11" D) Finished one and started on the second. I used birdseye maple veneer and white grill cloth at the request of his wife. Turns out that it looks pretty good even though I had my doubts about the white grill cloth . I did the "DeanG" 2ohm resistor switch to 1.8ohm on the tweeter series notch filter. Man they sound sweet. 2 Quote Link to comment Share on other sites More sharing options...
jjptkd Posted March 14, 2017 Share Posted March 14, 2017 Very nice, your cabinet work looks great! I use two in a vertical position and they sound great, I actually prefer them over the RB-75's. Quote Link to comment Share on other sites More sharing options...
TasDom Posted March 14, 2017 Share Posted March 14, 2017 Very cool and great craftsmanship as always! Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted March 14, 2017 Share Posted March 14, 2017 I thought the crossover and MTM configuration were designed to eliminate comb filtering. Wouldn't this configuration defeat that purpose? 1 Quote Link to comment Share on other sites More sharing options...
longdrive03 Posted March 14, 2017 Author Share Posted March 14, 2017 Thanks guys. CEC I'm not sure on your question but maybe some technical guys (above my level) can address that issue. I know that they sound very good (I think they are smoother than the RF7ii set I built even though they use the "old" K-67. This one seems better balance without the sometimes shrill sound of the RF 7ii. Could be room size/placement other factors as well. But I really enjoy this speaker. 1 Quote Link to comment Share on other sites More sharing options...
Deang Posted March 14, 2017 Share Posted March 14, 2017 Carl is right. The RC-7 network was designed to work in the MTM configuration. One of the woofers actually rolls much faster than the other one (I think one of those 8" drivers dives pretty hard at 500Hz). Like Carl said, the idea is to reduce comb filtering and increase dialogue intelligibility. I know everyone is tired of hearing this, but there is a mathematical relationship between the drivers, cabinet size, and port(s). The crossover is modeled to achieve best performance based on these parameters. When you start jacking around with things -- well, it's hard telling what you really have. Quote Link to comment Share on other sites More sharing options...
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