Connecting multiple pipes to a Conn Organ?

[skippy]

Hi folks,</P>


Does anyone know how to connect multiple pipes to a Conn organ? Thanks.</P>


Skippy</P>

[jbird604]

Re: Connecting multiple pipes to a Conn Organ?



Skippy,</P>


Assuming you mean "Conn" pipes, just know that each pipe unit is equivalent to an 8 ohm speaker. There are four speakers inside, but they are wired in a series/parallel arrangement so they appear to the amplifier as a single speaker.</P>


That being said, you can't wire more than two of them in parallel on a given amplfier, as two will appear to the amp as a 4 ohm load, the minimum allowed. However, if you are careful about phasingyou can wire the units themselves in a series/parallel arrangement to keep the effective impedance above 4 ohms.</P>


Another factor to consider is that there is very little bass output from these pipes, even from the tall ones. So you really don't want to use them on the flute/pedal channel of a Conn unless you have a crossover network to send the bass to a regular pedal speaker (15" normally) and block the bass from getting into the pipe speakers.</P>


Finally, you need to compensate for the relatively low output level of the pipes versus cone speakers.</P>


If all that is beyond your knowledge, then tread carefully. If you just hooked up 3 or 4 of them in parallelto a single amp output you'd probably destroy the amp, or at least blow a fuse.</P>


Also, read my other post about these pipes on your other thread about them.</P>


John</P>
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[skippy]

Re: Connecting multiple pipes to a Conn Organ?



<SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Thanks again John,<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></P>


<SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">I do understand that bringing down the impedance can fry the amp. I just wonder, if you maintain the 8 Ohm resistance by some clever series/parallel wiring of lets say 4 sets of <?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><st1:place w:st="on"><st1:State w:st="on">Conn</st1:State></st1:place> speakers (16 single speakers) would this not reduce the output volume of each set to 25% of its single use capacity?<o:p></o:p></SPAN></P>


<SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">I intent to buy another set identical to the set I already own together with a Leslie 700 next week (pending inspection). I had no intentions to buy another set of pipes but they come as part ofthe deal of buying the Leslie. All or nothing says the owner. He wants $AU300 for the lot. I suppose that is fair enough provided the gear is in good working condition.<o:p></o:p></SPAN></P>


<SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">I plan to connect these pipes to the main channel of my Thomas Celebrity 871. The main solo voices of this organ can do with some enhancement. I will have a look how the <st1:State w:st="on"><st1:place w:st="on">Conn</st1:place></st1:State> pipe outlet on my 643 is wired. Perhaps I can do the same on my Celebrity. It is probably just a matter of splicing into the 15” main speaker wires. Or perhaps better into the wires of the smaller 12" speaker.The strings are most likely channelled into the smaller speaker.I am just not sure if the Thomas amp can take the extra load. Any ideas?? [I]<o:p></o:p></SPAN></P><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: EN-AU; mso-fareast-font-family: 'Times New Roman'; mso-fareast-language: EN-AU; mso-bidi-language: AR-SA">Skippy<SPAN style="mso-spacerun: yes"></SPAN><SPAN style="mso-spacerun: yes"></SPAN></SPAN>

[jbird604]

Re: Connecting multiple pipes to a Conn Organ?



Just try it and see what happens. But play softly at first and if you hear distortion or clipping you may have a problem. The amps in the Thomas may not be designed to drive anything other than the built-in speakers. But you won't do any harm to it as long as you don't over-work the amps by playing loudly.</P>


John</P>


PS . . someone mentioned on the other thread about Conn pipes that the small units are 16 ohms. I had forgotten that, but it sounds right. Probably two 8 ohm speakers inside wired in series to make 16 ohms. In the case of those units, you could safely drive 3 from a single amplifier.</P>


Also, to answer you other question about series/parallel -- yes, the actual volume level of each pipe unit will be reduced when wiring them in this manner. But that is the only way to safely do it. The better way would be to have a dedicated amplifier for your pipes. Then you could drive two pipe units from each channel of amplification, and as a bonus would be able to control the volume of the pipes independently of the other speakers.</P>


John</P>

[skippy]

Re: Connecting multiple pipes to a Conn Organ?



Thanks John,</P>


The proof of the pudding is in the eating. I will give it a go. It looks like both speakers are fed the same signal and it thereforedoes not really matter where I splice into. I will get the pipes tomorrow (provided they are in reasonable condition). The Thomas is at my weekender in the Blue Mountains. It may be a while before I have a chance to try it. I will keep you posted.</P>


Cheers,</P>


Skippy</P>