NOTE-
The circuitry associated with the insert send and return is bypassed when not in use,
(the bypass circuitry senses either the presence of a jack in the insert return
connector or the position of the front panel switch. When active, this circuitry is the limiting factor in the system headroom.
· Side chain input
Nominal signal level of +4, balanced input, normalled source from the insert return circuitry. Provides access to the control circuitry for use in Deessing or Ducking.
· Side Chain Couple
Provision for coupling multiple units. Both source and input are carried via this port, and the signal at this port is the active DC control line. The signal(s) are summed on this port and it should only be used with other BA-660 limiters. The protocol for direct operation of the gain cell is available upon request from the manufacturer.
· Line Output The line output is a balanced and floating solid state class A type power stage that can have either leg taken to ground without degradation of either headroom, gain, distortion or noise. Care must be take however to select the correct polarity to be grounded with the Un-Balance switch on the rear. The ground will be taken at the output of the unit, and should not be take at the input to a single ended device. Rather, wire as balanced and have the single ended input pick up it's reference from the output of the BA-660. The shield is source’d at pin 1 of the XLR. Pin 2 is wired as plus (+) and Pin 3 is wired as minus (-)
· Signal Gnd (Black)
This is the ohmic contact to the technical earth of the BA-660 and ties via a #12 cable to this point. If any studio grounds, aside from the 3rd pin of the power cord are supplied, they should be referenced to this binding post. The link should be removed when the 3rd pin is attached as well as the studio ground wire. If the 3rd pin is not attached, and the link is lifted, severe hum is likely. There is a small degree of safety provided by 2 cross shunting diodes and a .047m cap that internally ties these two points together.