H e l i o s
Signal Chain

Helios plugs into Most Commond Sources with a Stereo 1/4" TRS Headphone_Jack:
   Headphone_out from pro mixer < any 600 ohm line driver >  
   Audiophile Receiver Headphone_Jack < Very Convenient to demo in Showroom >
   
   Headphone_Plug goes to a Male XLR < 6' twisted pair with foil & drain >   
   Male XLR connects to [System_Input], a Female XLR at Amplifier Case

 [System_Input = Female XLR wired Headphone TRS]

   pin 1 = Shield = Shaft
   pin 2 = Left =   Tip
   pin 3 = Right =  Ring
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EQ/XO [Network / Side]     R = k,  C = uF,  G = Ground,  '~' = Hz 

          ,01   ,0022                 
         +-)(-+-)(---> >-+
         |    >          > <--[Amp]--> Tweets
         |    > 22k      >
         |    >          >  22k=Ri{ input resistor in ART SLA I Amp )
         |    G          G
    Sys  +---------+
    In    1,0  0,1 |
   >-----+-)(-+-)(-+-> >-+ 
    Zi > |    >          > <--[Amp]--> Mids
    600  |    > 2,2k     >
    ohms |    >          > 22k
         |    G          G
         |          
         |   2k
         +-/\/\/\-+--> >-+ 
                __|__    > <--[Amp]--> Woofs
           16~  _____5uF >
                  |      > 22k
                  G      G

 5 caps & 3 resistors built om a dual 3/4" Banana Plug
 with 3 1' twisted pair & 3 TRS 1/4" Phone Plugs to Amps
 <  -> to Tip, Ground to Ring, {NO shield or Ground}
 < full floating balanced relative to source ground
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Driver  Wiring
 Driver Pairs are [Back to Back],  [Front & Rear]
 Elecrically :   Wired 180 Out of Phase
 Physically : Cones/Domes Move In Phase