robforst1 Posted October 4, 2002 Share Posted October 4, 2002 I am thinking about using a Heresy for my front center channel with my Yamaha RX-V1 Receiver. Is there any way to wire it to use 2 Heresy speakers for the front center instead of just 1? Rob Quote Link to comment Share on other sites More sharing options...
Stephen328 Posted October 4, 2002 Share Posted October 4, 2002 The obvious way to do it would be to buy an aditional amplifier. Just make suer the amplifier you buy has the same gain as your reciever. I'm sure it will sound great. Quote Link to comment Share on other sites More sharing options...
dougdrake Posted October 4, 2002 Share Posted October 4, 2002 Why do you want to do that? Some of the Yamaha's had connections for two center channel speakers. Does yours? You COULD wire them in series, which would present a 16-ohm nominal load to your Yammy rather than in parallel which would drop the load to 4-ohms (which may not be a problem -- better check the owner's manual). Doug Quote Link to comment Share on other sites More sharing options...
Malcolm Posted October 4, 2002 Share Posted October 4, 2002 Yep, wiring them in series or parallel is the simplest way. Why do you want to do this? Quote Link to comment Share on other sites More sharing options...
jtkinney Posted October 4, 2002 Share Posted October 4, 2002 I've got my Heresy's wired in parallel to my RX-V1. I have never had a problem, but there is a switch on the back to change the minimum impedance to 4ohms. Quote Link to comment Share on other sites More sharing options...
robforst1 Posted October 4, 2002 Author Share Posted October 4, 2002 How do you wire them in parallel? Quote Link to comment Share on other sites More sharing options...
robforst1 Posted October 4, 2002 Author Share Posted October 4, 2002 If I want to use a Heresy for the center (best timbre match), I will have to buy 2. I figure that I may as well try and use both. Although, I could always use the other one for a rear center... Quote Link to comment Share on other sites More sharing options...
Malcolm Posted October 4, 2002 Share Posted October 4, 2002 In this case, two may not be better than one. You may get interactions between the two. Might be better to use the extra one for a rear center or sell it. There is another current thread that explains series and parallel wiring. Quote Link to comment Share on other sites More sharing options...
dougdrake Posted October 4, 2002 Share Posted October 4, 2002 jtkinney has done exactly what you are contemplating. Jim, any negative interactions (like frequency cancellation/boosting) that you can detect from having two front center channel speakers? DD Quote Link to comment Share on other sites More sharing options...
Q-Man Posted October 4, 2002 Share Posted October 4, 2002 Use one for the front center and the other for the rear center. I have a Yamaha RX-V2092 that I dont use anymore. It has two front center channels oututs. I tried two speakers for a while, but went back to one speaker. One seems more detailed and localized, and that is what you want from the center channel. Quote Link to comment Share on other sites More sharing options...
kjohnsonhp Posted October 4, 2002 Share Posted October 4, 2002 You may want to see the following post from BobG: COPIED POST FROM SEVERL MONTHS AGO "If you use two centers, they will actuall interfere with each other just like dropping two rocks into a pond makes two series of waves that crash into each other and cancel, or add unpredictably. It just doesn't work. (This is also the reason you want to keep your speakers away from nearby walls which would reflect sound and cause interference). The resulting interference makes a total mess of tonal balance. " -- Quote Link to comment Share on other sites More sharing options...
jtkinney Posted October 4, 2002 Share Posted October 4, 2002 I have always been told there would be cancellation or comb effects using two speakers for the front center, but have never heard them. I am using a pair of Heresy's connected in parallel, +'s together and -'s together. Before the Heresy's I used parallel SF-1's and SF-2's. In my case, I can't use a single speaker and have it centered with the TV. The closest I could come would be a Heresy turned sideways in front of the TV. I've attached a photo showing my current setup. Quote Link to comment Share on other sites More sharing options...
erikjohn Posted October 23, 2002 Share Posted October 23, 2002 I run 2 heresy's in parallel for a center on my RX-V1. Sounds great and no problems. I have to disagree with the notion of them canceling. Common sense would tell me that if this was true than any monoral sorce played out two speakers or even identical sound that is reproduced in stereo out of L-R speakers would cancel itself out. What about center channels with 2 drivers? Technically they are reproducing the same sounds, wouldn't they then cancel each other out? Using 2 heresey's is no different than using a center with with two drivers. Please correct me if I am wrong as this seems to be an ongoing question. EJ Quote Link to comment Share on other sites More sharing options...
robforst1 Posted November 3, 2002 Author Share Posted November 3, 2002 Is there a cable that has already been set-up to do what I am thinking about (or do I need to make my own)? Quote Link to comment Share on other sites More sharing options...
jtkinney Posted November 3, 2002 Share Posted November 3, 2002 I have never seen one premade. You can just run the wires from both speakers and put them in the same jacks on the receiver. I may have used banana plugs on mine, with one speaker plugged into the back of the banana plug for the other speaker plugged into the receiver jacks. Did that make any sense? Quote Link to comment Share on other sites More sharing options...
robforst1 Posted November 3, 2002 Author Share Posted November 3, 2002 Jim, That did not make sense. Could you please give me a more detailed explanation. If you have any pictures, that would be terrific too...thanks! Rob Quote Link to comment Share on other sites More sharing options...
erikjohn Posted November 4, 2002 Share Posted November 4, 2002 Rob, When runnjing in p[arallel all you are doing is running two speakers the exact sme way you would run one. Insted of hooking one pair (+/-) of wire off the amp you run 2 off one channel. You can also pigglyback one set of wires off the back of one speaker to the other if you do not want to run 2 sets of wires from the amp to the speakers. Parallel just means you run positive to postive terminal and negative to negative terminal on both speakers. To clarify what series is: When you hook the positive wire from amp to (1) center speker positive binding post, run one wire form (1) center spekaer negative post to (2) center speker positive binding post, run one wire from (2) center speaker negative binding post back to negtive output terminal on amp. Thus now these two speakers are wired in a series. Noting that a series connection will give your overall impedence that the source sees as (1)center impedence plus (2)center impedence. The formula(ohm's law) for resistors(speakers in this case) in parallel is ((1) center impedence plus (2) center impedence)/N, where N equals the nuber of resistors which in this case is two(2 speakers). Series is just the sum of resistor impedences. Also noting that impedence or resistance is measured in Ohms. Thus when running in parallel will give you 4 ohms and series will give you 16 ohms. To make a long story short to run in parallel just run the speaker wire the way you would run any speaker wire except hook two spoeakers up to one output on your receiver. EJ Quote Link to comment Share on other sites More sharing options...
jtkinney Posted November 5, 2002 Share Posted November 5, 2002 Sorry Rob, no pictures. Banana plugs have jacks built into the backs of them, so you can daisy chain several together. Plug the first one from say the left speaker into the receiver. Then plug the second one from the right speaker into the back of the other plug. Make sure like EJ said, that the positive and negative sides of the speakers and receiver are all hooked up the same. Quote Link to comment Share on other sites More sharing options...
artto Posted November 21, 2002 Share Posted November 21, 2002 You really don't want to have 2 center speakers. Two speakers producing the same signal in such close proximity to each other (in a, relatively speaking, small space)produces something called the "comb filter" effect. Various alternating frequencies will be cancelled and exaggerated (producing a "comb" like effect to the acoustic wavefront) due to the time difference between the two speakers. It will create a rather jagged frequency response. artto Quote Link to comment Share on other sites More sharing options...
Invidiosulus Posted November 21, 2002 Share Posted November 21, 2002 artto, How would this be any different then having a center channel speaker with two drivers for the midbass? Just idle curiosity on my part as I barely have room for the speakers I have Peace, Josh Quote Link to comment Share on other sites More sharing options...
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