REAR PANEL
INPUT A / INPUT B
CL800 +1.15dBu / 0.88V CL1200 +3.2dBu / 1.12V CL1600 +4.7dBu / 1.33V CL2000 +5.5dBu / 1.46V
The inputs INPUT A & INPUT B of the CL series are electronically balanced. The voltage gain of all models is set to 32 dB (constant gain). This results however in different input sensitivities for the different models (see table), but the level adjustment of active crossovers or signal processors in multi-way systems is much easier. Power amplifi ers with different output power can be changed without consideration, the crossovers have not to be adjusted due to the constant amplifi cation of the whole unit line. If external voltage limiters are used, they should be set to the used power class with consideration of the connected speaker systems. The XLR-type connectors OUTPUT A & OUTPUT B are prepared for „through-connecting“ input signals to additional external power amps. The input signal is directly routed to these output connectors. There are no repeaters or other electronic components within that signal path. Accordingly, input and output connectors of the corresponding channel are interconnected in parallel, offering permanent electrical connection, without regard to the setting of the Power-ON switch.
Although having XLR-type output connectors, some mixing console models provide unbalanced output connection only. When using mixers with unbalanced outputs, bridging PIN1 and PIN3 of the power amp’s input connectors or leaving PIN3 of the cable’s plugs unconnected is necessary. Otherwise, when feeding in unbalanced audio signals via PIN3 (b, -, „cold“) and PIN2 (a, +, „hot“), strange humming and RF-interference may occur, which very likely will damage the power amplifier and/or the connected speaker cabinets.
NF-CONNECTION CORDS
Choosing high-quality balanced cables (two conductors for the audio signal plus seperate shielding mesh) with XLR-type connectors are recommended for LF-signal connection. Although connecting un- balanced cables to the power amplifi er inputs is possible as well, using balanced cables is always pref- erable. A great number of today’s audio appliances employ balanced outputs. With balanced cabling, the shield connects all metal enclosure parts and therefore effi ciently eliminates the introduction of ex- ternal interference – mostly noise and hum.
XLR-type connector pin-assignment
PARALLEL
The input connectors of channel A and channel B are electrically connected in parallel when the selector switch is set to PARALLEL. However, individually controlling the volume of both channels is still possible via the corresponding level controls A and B.
DUAL
If the selector switch is set to DUAL, the audio signals of channels A and B are independently amplifi ed.
