User manual SMART DEVICES TA250

[. . . ] This limited warranty does not cover products that have been abused, altered, modified, or operated in other than specified conditions. Prior factory approval is required on all returns. Returned equipment or defective parts must be shipped freight prepaid to us by the dealer or customer. Our limited warranty does not cover damages resulting from accident, misuse or abuse, lack of responsible care, or failures not attributable to manufacturing defects, except as provided herein. [. . . ] If the amplifier is to be mounted in an equipment rack or cabinet with other heat producing equipment, ensure environmental operating temperatures do not exceed 55C (131F). Should overheating occur because of inadequate ventilation, thermal protection circuitry will automatically protect the amplifier. When a safe operating temperature is restored, the amplifier will resume normal operation. Because the amplifiers are capable of delivering high power from a relatively small physical package, considerable heat can build up in cabinets containing several instruments. A good rule of thumb to adopt is; "Provide forced air cooling in any enclosure containing four or more instruments. " 3 INSTALLATION & OPERAShould the heat sink reach 95C, thermal protection circuitry will automatically disconnect the amplifier's output stage from the load (loudspeaker) until the temperature decreases sufficiently. The action of removing the load eliminates output current, resulting in an immediate temperature drop. The thermal protection circuit will automatically reconnect the load when the temperature drops below 95C. Fan Assist Cooling To provide continuous operation under adverse operating conditions, a Dual Fan Forced Air Cooling System has been added for extra protection. Temperature is controlled automatically by a thermal switch which turns on the Cooling System when required. Controls/Connections POWER SWITCH To turn the amplifier ON or OFF, press the upper or lower portion of this rocker switch. POWER INDICATING LED This LED indicates power is turned ON. LEVEL CONTROLS Each channel has a separate low noise 41 click detent rotary level control. Rotate controls clockwise to increase level. SIGNAL STATUS INDICATORS Two green LED indicators are normally off with no signal present and illuminate when signal is present. CLIP INDICATORS Two red LED indicators illuminate when the amplifier has reached full power, If the amplifier is driven into a clip condition, a Softclip circuit is activated attenuating the input signal and preventing a Hard Clip condition where the amplifier's output saturates to a DC level. 1/4" JACK INPUT CONNECTIONS Balanced and Unbalanced inputs can be accepted via the 1/4" Jack. Balanced inputs: Tip = High, Ring = low, Sleeve = Ground. . Unbalanced inputs: Tip = High, Sleeve = Ground. Note: The Unbalanced 1/4" Jack parallels the XLR connector for easy daisy chaining of amplifier inputs. XLR INPUT CONNECTIONS XLR input connectors are provided for balanced input signals. Please note; Pin 1: Ground, Pin 2; High, Pin 3: Low 1) PARALLEL: The input signal is applied to Channel One only. Channel One and Two inputs are connected in parallel and the same signal at both Channel One and Channel Two outputs. [. . . ] Set the INPUT SELECTOR SWITCH to BRIDGE. Connect the input signal to Channel One's input jack. Connect the speaker load to the two red terminals of each channel. Confirm the (+) terminal of the speaker to channel one and the (-) terminal to channel two. [. . . ]