9SPEAKON® OUTPUTS
PV® 1600 utilizes 4-conductor Speakon connectors. Internally, the Speakons are wired with the Lows on pins 1+ and 1- and the Highs on pins 2+ and 2-. These will properly mate with all Peavey speakers that have Bi-amp inputs via Speakons. Note: For powering SP4 speakers, internal jumpers must be connected inside the speaker terminal plate (see the instructions in the PV4 owners manual).
10FAN GRILL
A two-speed DC fan supplies cool air to the amplifier. THIS INTAKE SHOULD NEVER BE BLOCKED! The fan switches to high speed automatically when the unit requires additional cooling. At idle and cool, the fan should be in low speed. The fan should never stop unless the amplifier is switched OFF or the AC mains power source is interrupted.
11COMBO INPUT CONNECTOR
The combo connector offers both female XLR and 1/4” phone jack balanced inputs. The XLR is wired with pin 1 as ground, pin 2 positive input, and pin 3 negative input. The 1/4” phone jack is a tip/ring/sleeve (3-conductor) type, with the tip being positive input, the ring negative input, and the sleeve ground. It is important to realize that the XLR and the 1/4” jack in parallel. Use a male XLR or a 3-conductor phone jack for balanced input. As an alternative, the 1/4” input can also be used with a regular tip/sleeve (2- conductor) type plug commonly found on single-conductor shielded patch cords. In this case, the input becomes unbalanced, with the tip as positive input, and the sleeve as ground (the ring being grounded by the sleeve of the plug). An additional unique feature of this 1/4” input jack is something called a quasi-balanced input. The sleeve of this jack is connected to chassis ground through a relatively low-val- ue resistance that is part of a ground loop elimination circuit. This circuitry provides hum-free operation when relatively short 1/4” cable patches are made to this input from various outputs on this amplifier, or from other equipment that shares the same rack with this amplifier. The quasi-balanced circuitry is automatic and virtually invisible in normal usage.
