A T C S C M 2 0 A S L U s e r P r o O p e r a t i n g / S C M 2 0 P S L P r o M a n u a l AC O U S T I C ENGINEERS ®
SCM20ASL/SCM20PSL Pro Safety Warnings 1. Read instructions – all the safety and operating instructions should be read before the appliance is operated. 2. Retain these instructions – the safety and operating instructions should be retained for future reference. 3. Heed warnings – all warnings on the appliance and in the operating instructions should be adhered to. 4. Follow instructions – all operating and other instructions should be followed. 5.
SCM20ASL/20PSL Pro Introduction Welcome. In selecting ATC, you have chosen an example of the finest audio engineering available. ATC was founded on a principle of engineering excellence, and that principle still defines our products today. Given the right opportunities, ATC products will deliver exceptional audio performance, but the opportunities will only arise from careful and thoughtful installation and use. Please read the following manual fully.
SCM20ASL/SCM20PSL Pro 1. Description 3. Monitor Placement The SCM20 Pro series consits of two models of loudspeaker; one passive, one active. Passive units are denoted by a PSL suffix and active units by an ASL suffix. Passive monitors are equipped with a “bi-wire” connection panel to enable separate amplification of mid/bass and high frequency drivers if required.
SCM20ASL/20PSL Pro Fig. 3. 5.1 and 7.1 Surround Loudspeaker Positioning centre All loudspeakers should be equidistant from the listening position: distance L=C=R=LS=LR=RR=RS Ÿ For 5.1 systems, position the surround speakers between 110° and 150° degrees (ITU spec. is 110°) Ÿ If ideal positioning isn’t possible, position loudspeakers as close as possible to ideal.
SCM20ASL/SCM20PSL Pro 6. Operation - SCM20ASL Pro power/limit Fig. 7. SCM20ASL Pro Front Baffle 6.1 Power On/Limit LED Situated on the lower-front baffle of the SCM20ASL Pro is the Power On/Limit indicator LED. When the monitor is powered ‘On’, the LED will illuminate green. This feature is shown in Fig. 7 above. When the monitor is driven hard and the amplifier FET limiter begins to act, the LED will turn red. The brighter and longer the duration the LED red ‘flash’, the more severe the limit event.
SCM20ASL/20PSL Pro 6.3 Power Switch Switches on the monitor. When powered up, the front panel power/limit LED will illuminate green. 6.4 Fuseholder Should a monitor fail to switch on when the power switch is operated, the fuse should be inspected. Lift out the fuseholder cover using a small flat-blade screwdriver, remove the fuse and inspect for damage. If required, a replacement fuse should be fitted. Ratings are printed on the amp rear panel.
SCM20ASL/SCM20PSL Pro SCM20PSL Pro 7. Connection The SCM20PSL Pro monitors are equipped with a “bi-wire” connection panel to enable separate amplification of the bass/mid driver and tweeter. The connection panel is shown in Fig. 8 below. If not bi-wiring, connect your speaker cable to either the upper or lower horizontal pair of terminals. Remove the linking bars, between vertical pairs of terminals should you wish to take advantage of the bi-wire facility.
SCM20ASL/20PSL Pro 9. Specifications SCM20ASL Pro 1. Acoustic l Drive unit - Low Frequency (LF) l Drive unit - High Frequency (HF) l l l l l l Amplitude linearity Cut-off frequencies Horizontal dispersion Vertical dispersion Maximum continuous SPL Crossover frequency 2. Electronic l Audio input l Input sensitivity l Input sensitivity trim l Total input sensitivity range l Input impedance l LF amp max output power l HF amp max output power 6.
SCM20ASL/SCM20PSL Pro 10. Care and Maintenance High technology material finishes are used in this product.The surfaces are durable and with a little care can be kept as good as new, even under conditions of heavy use. Normally a dry duster will be all that is required to keep the finishes clean. Heavy soiling can be cleaned using a cloth slightly moistened with a non-abrasive household cleaner.
AC O U S T I C ENGINEERS ® Loudspeaker Technology Ltd Gypsy Lane, Aston Down, Stroud, Gloucestershire GL6 8HR United Kingdom Telephone 01285 760561 Fax 01285 760683 Email: info@atc.gb.net Web: www.atcloudspeakers.co.uk Acoustic Transducer Company is the trading name and ATC is the registered trade mark of Loudspeaker Technology Ltd.
