6safety
LT / ST owner’s manual
user responsibility
Your LT / ST Series amplifier is very powerful and can be potentially dangerous to loud- speakers and operators alike. It is your responsibility to read important precautions (see the
Many loudspeakers can be easily damaged or destroyed by overpowering, especially with the high power available from a bridged amplifier. Always be aware of the speak- er’s continuous and peak power capabilities. Crest Audio is not responsible for damage to loudspeakers for any reason.
speaker protection
All loudspeakers have electrical, thermal and physical limits which must be observed to pre- vent damage or failure. Cone or compression drivers can be damaged (sometimes to the point of failure) from excessive power, low frequencies applied to high frequency drivers, severely clipped wave forms,and DC voltage. All LT / ST Series amplifiers automatically protect speak- ers from DC voltages and subsonic signals.
Mid- and
The amplifier’s clipping point is its maximum peak output power. At maximum peak output power,Crest Audio LT / ST Series amplifiers will deliver more power than many speakers can safely handle. Be sure the peak power capability of the amplifier is not excessive for your speaker system.To ensure that the speakers never receive excessive power, and to prevent amplifier clipping,use a properly adjusted external limiter (or a compressor with a ratio of 10:1 or higher) to control power output. Use one compressor/limiter for each frequency band in systems with active electronic crossovers.
The ACL clip limiting circuit will automatically limit the duration of
recommended speaker cabling
The wire gauge charts will assist you in determining the optimum copper wire gauge for your speaker cables. Remember that the speaker cable resistance robs amplifier power in two ways: through power lost directly to resistance (often referred to as I2R loss), and through increased total load resistance, which decreases the amount of power available from the amplifier. Appendix C gives cable length figures in feet/AWG wire gauges and in metric values.
p.22