wuzzzer Posted November 19, 2018 Share Posted November 19, 2018 Here's my thought: RB-5s can be had pretty cheaply. Since I'm currently using RB-5s as my fronts what would be the disadvantage to using two of them wired in series? I would be placing them on their sides with their tweeters next to each other and my tv on top. It would be a MTTM configuration. Each tweeter diaphragm would be about 8 inches from each other. My wife has always wanted a slightly higher tv stand and this way the tv will sit about 9" higher. I know there's comb filtering and such that can happen when doing this but I know the closer the tweeters are placed to each other the better. Obviously the timbre match would be perfect. Also, I believe the horn on the RB-5 is a 90x60 design. How will that affect the sound when placed horizontally? Due to the mounting screws the horn can't be rotated like it can be on other models. 1 Quote Link to comment Share on other sites More sharing options...
Frzninvt Posted November 20, 2018 Share Posted November 20, 2018 I would advise against it but if you do hook them up in series so the amplifier's channel sees it as a single speaker. The ohm load will be higher so you will have to compensate with the preamp output level to match the mains. It would be easier to just get the correct matching center and call it done. Quote Link to comment Share on other sites More sharing options...
baron167 Posted November 21, 2018 Share Posted November 21, 2018 Fwiw, I have 3 speakers in series for my center. No issues.Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
wuzzzer Posted November 21, 2018 Author Share Posted November 21, 2018 2 minutes ago, baron167 said: Fwiw, I have 3 speakers in series for my center. No issues. Sent from my iPhone using Tapatalk What speakers? Got a pic? Quote Link to comment Share on other sites More sharing options...
JohnA Posted November 21, 2018 Share Posted November 21, 2018 Place the on their sides, tweeter to tweeter and wire them in parallel, not series. Unless your power amp is pushed too hard already, the extra current draw will not create enough heat to cause damage. Either way, you will have to recalibrate the center channel level. 1 Quote Link to comment Share on other sites More sharing options...
baron167 Posted November 21, 2018 Share Posted November 21, 2018 Place the on their sides, tweeter to tweeter and wire them in parallel, not series. Unless your power amp is pushed too hard already, the extra current draw will not create enough heat to cause damage. Either way, you will have to recalibrate the center channel level. I do not agree. I strongly suggest wiring in series first.Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
wuzzzer Posted November 21, 2018 Author Share Posted November 21, 2018 1 minute ago, JohnA said: Place the on their sides, tweeter to tweeter and wire them in parallel, not series. Unless your power amp is pushed too hard already, the extra current draw will not create enough heat to cause damage. Either way, you will have to recalibrate the center channel level. Why do you recommend parallel and not series? Quote Link to comment Share on other sites More sharing options...
JohnA Posted November 21, 2018 Share Posted November 21, 2018 5 minutes ago, wuzzzer said: Why do you recommend parallel and not series? Woofer damping. The additional woofer adds impedance to the system and each will react like the power amp has very high output impedance. The woofers will be poorly controlled by the amp and will tend to move too far and "ring" for too long giving a sloppy sounding bass note. Quote Link to comment Share on other sites More sharing options...
wuzzzer Posted November 21, 2018 Author Share Posted November 21, 2018 12 minutes ago, JohnA said: Woofer damping. The additional woofer adds impedance to the system and each will react like the power amp has very high output impedance. The woofers will be poorly controlled by the amp and will tend to move too far and "ring" for too long giving a sloppy sounding bass note. But if the additional woofer adds impedance to the system, series wiring will lessen it, right? Two 8 ohm speakers in series = 16 ohm load, two 8 ohm speakers in parallel = 4 ohm load (approximately). Quote Link to comment Share on other sites More sharing options...
JohnA Posted November 21, 2018 Share Posted November 21, 2018 I was not clear. Wiring in series adds impedance and will make the woofers sound sloppier. In parallel, each woofer sees the amp directly, with no series impedance to interfere. How much sloppier? You'll just have to see with your equipment. 1 Quote Link to comment Share on other sites More sharing options...
wuzzzer Posted November 21, 2018 Author Share Posted November 21, 2018 Thanks! I think to experiment at first I'm going to use my Heresy IIs as fronts and connect the RB-5s as described as a center first and see how it sounds. If I like it I'll get another pair of RB-5s. Quote Link to comment Share on other sites More sharing options...
baron167 Posted November 21, 2018 Share Posted November 21, 2018 No! You're talking about a center channel. Start with series (won't damage anything) and can play with levels. You're not going to experience any sloppiness in anything in series. You will risk burning up your AVR playing around with dropping the load wired in parallel. Good luck! I'm out of this discussion. Happy experimenting and Happy Thanksgiving!Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
wstrickland1 Posted November 22, 2018 Share Posted November 22, 2018 wish I could trade out an RC7 for the HII's... Quote Link to comment Share on other sites More sharing options...
teaman Posted November 22, 2018 Share Posted November 22, 2018 I run a dual center with KP-201 between a pair of KP-250 ii and I have zero issues with them set up like that. I have each powered by a separate amp channel so there is no worry about impedance dips. I use an Emotiva XLR signal splitter to run the dual signal from my preamp out and it does a fine job Tim Quote Link to comment Share on other sites More sharing options...
teaman Posted November 22, 2018 Share Posted November 22, 2018 Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
wuzzzer Posted November 22, 2018 Author Share Posted November 22, 2018 35 minutes ago, wstrickland1 said: wish I could trade out an RC7 for the HII's... I know I know. I'm just going back and forth of what I want to do. Hooked my H IIs back up tonight and man they're awesome. 😔 Quote Link to comment Share on other sites More sharing options...
wstrickland1 Posted November 22, 2018 Share Posted November 22, 2018 55 minutes ago, wuzzzer said: I know I know. I'm just going back and forth of what I want to do. Hooked my H IIs back up tonight and man they're awesome. 😔 Definitely don't blame you. Between the shipping and cutting loose a pair of H2's it's really not that tough of a decision. Quote Link to comment Share on other sites More sharing options...
teaman Posted November 22, 2018 Share Posted November 22, 2018 Not to interfere with any possible deals between you guys...but have you ever thought of using the Heresy pair for fronts and then the RB-5 duals for center? Quote Link to comment Share on other sites More sharing options...
wuzzzer Posted November 22, 2018 Author Share Posted November 22, 2018 7 minutes ago, teaman said: Not to interfere with any possible deals between you guys...but have you ever thought of using the Heresy pair for fronts and then the RB-5 duals for center? I have. I'll try it out soon and see how it works. 1 Quote Link to comment Share on other sites More sharing options...
wstrickland1 Posted November 22, 2018 Share Posted November 22, 2018 or (3) RB5's across the front? 1 Quote Link to comment Share on other sites More sharing options...
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