General Installation WARNING DO NOT run unbalanced high impedance microphone cables near mains, data, telephone or 70/100V line cables. THIS APPLIANCE MUST BE EARTHED DO NOT run 70/100V line cable near data, telephone or other low voltage cables. DO NOT exceed 90% of the amplifiers output power when using 70/100V line (speech only).
2120P/2240P User Manual Introduction Description Congratulations on your purchase of a new The QTA 2120P and QTA 2240P are 2 channel Q-Tech Commercial series amplifier. Quest power amplifiers designed for 2 zone Engineering Q-Tech Series amplifiers are applications. engineered and built to a standard that will...
If necessary, turn the gain control • Check also speaker types, ratings and for on the rear panel to what you desire. We any short circuits on the speaker line. suggest turning the gain level to maximum always. Q-Tech Commercial Series User Manual QTA 2120P/2240P...
Speaker Systems Demystified Type Booster Amplifier In a typical paging and background music speaker installation, quantity loudspeakers Model QTA 2120P QTA 2240P are placed across a single amplifier in a parallel wiring configuration (see Fig 1.). Output Power 120W x 2...
The quick way is to just add up all the wattages and then give yourself 10-20% headroom by reducing the number of speakers per amplifier or lowering the wattages slightly. Q-Tech Commercial Series User Manual QTA 2120P/2240P...
Page 10
200W 50Ω (100V plan) P = E x E / Z = 100x100 / Z = 10,000 / Z P: Power(W), Z : Impedance (Ω), E : 100V(Designed voltage of a general-use amplifier) User Manual Q-Tech Commercial Series QTA 2120P/2240P...