Sherbourn technologies lds 2 75 owners manual
This is the 8 pages manual for sherbourn technologies lds 2 75 owners manual.
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Extracted text from sherbourn technologies lds 2 75 owners manual (Ocr-read)
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2 plifier is going to be housed in an enclosed envi- ronment, that you allow for adequate ventilation. Despite the adequately sized heatsinks built into the amplifier, it is still important that good ventila- tion be provided. Do not install the amplifier di- rectly above another heat generating component such as another amplifier without adequate venti- lation. 2. If your amplifier is going to be placed in an en- closed space such as an armoire, it is essential that adequate ventilation be provided. 3. The dealership from which you purchased the product is an expert on custom installation proce- dures and can provide invaluable advice to help you make an aesthetically pleasing and trouble free installation. Caution For Connections 1. Connect this equipment only to the type of AC power source as marked on the unit. Always route AC power cords so they are not likely to be walked on, or tripped over, or where they may be pinched by items placed on or against them. Always pay particular attention to cords at plugs and/or conve- nience receptacles, and at the point where they exit from the product. 2. Do not defeat the inherent design features of the polarized plug. Non-polarized line cord adapters will defeat the safety provided by the polarized AC plug. If the plug should fail to fit, contact your electrician to replace your obsolete outlet. Do not defeat the safety purpose of the grounding-type plug. If you use this product in a country which only has two slotted receptacles in the house, you must use a three-pin adapter plug to earth ground which is the E (earth pin) of the power cord con- nected to this product. 3. Do not overload wall outlets, extension or inte- gral convenience receptacles, as this could result in a risk of fire or shock. Operating Voltage The LDS2/75 amplifier is factory-set for 110V, 120V or 230V AC operation at either 50 or 60 Hz, according to the country for which the unit was manufactured (230V in European Union countries, in compliance with CE regulations). The operat- ing voltage cannot be changed by the user and any attempt to do so will void the warranty. Care of the Product Clean the product by dusting with a dry cloth. Donot permit objects of any kind to be pushed and/or fall into the product through the enclosure open- ings. General Description The LDS2/75 is an intuitive product that has been designed to provide amplification for up to two pairs of 8 ohm speakers or one pair of 4 ohm speak- ers. The LDS2/75 outputs a total of 100 watts into 8 ohm loads and 150 watts into 4 ohm loads. An embedded MPU (Micro Processing Unit) ensures that the amplifier cannot be overdriven, and the LDS (Load Detection System) ensures that all speaker connections must be good before the am- plifier is connected to the speakers. The LDS2/75 has an automatic internal sub-sonic filter of -18dB per octave which rolls off very low frequency content (below 20 Hz) to avoid low fre- quency saturation of a transformer volume control. The unit can be set for a bridged/mono application in which case the output will be 150 watts into 8 ohm loads. The 2/75 has a great many features all of which are described in this manual. Front Panel Description The front panel has a blue LED will glow brightly when the unit is active and will dim considerably whenever the unit is in its sleep mode. The volume control knob allows you to set a pre- ferred level. Rear Panel Description The following description identifies each of the main controls/connection options and follows the rear panel from left to right. Input The amplifier offers both speaker level and line level inputs. A balanced input buffer is employed in the speaker level input circuit that will accept an output signal from either a grounded or a float- ing music source. Line Output (Buffered) For use whenever a daisy-chain installation and multiple LDS2/75s are used. Mode Switch This control allows for a selection of Stereo
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3 Mono or Mono/Bridged. In the latter mode, the maximum output power is 150 watts. Please note that R-Channel input is accepted under the bridged operation. Bridging is ONL Y recom- mended when 8 Ohm speakers (or greater imped- ance) are used. Music With the LDS2/75s trigger switch in the music position, it will automatically function once it re- ceives a music signal and will move into its standby mode whenever the signal is absent for approxi- mately five minutes. It will reactivate immediately a signal is again received. 12 Volt Trigger With the switch in the 12V position, the LDS2/75 can be turned on from a standby state whenever a 6V to 15V input signal appears at the 12V input connector. 12 Volt Connector For 12V trigger input and output use the upper two circuits marked +IN- for 12V trigger input (to turn on the LDS2/75 amplifier) and use the lower two circuits marked -Out+ for trigger output. The in- put accepts only a continuous DC trigger signal from 6V minimum to 15V maximum for turning on the LDS2/75 amplifier. The trigger output is capable of delivering a con- tinuous 12V, 30 mA of DC current to drive the down-stream products (or multiple units of LDS2/ 75 amplifiers) that may be associated with the LDS2/75 amplifier.NOTE: If the music is discontinued for longer than 5 minutes, the LDS2/75 will automatically enter its sleep mode to cut down on energy con- sumption. The front blue LED will then dim to indicate that the amplifier is in Sleep and will only return to its full luminance when it again receives a music signal. LDS LED This important control indicator is provided to in- dicate the correctness of your speaker connections and to indicate that the intended speaker load is not too great for the amplifier. Speakers 1 and 2 These are the speaker-out terminals that are con- nected with the cables from the loudspeakers. Power Switch Normally once you have switched on the amplifier the signal sensing mode or the 12 volt trigger switch will ensure that the amplifier goes into a sleep/ standby mode whenever it is not being directly used. Protection Features Your LDS2/75 includes some important circuits that are designed to protect the amplifier. LDS (Load Detection System) The LDS feature is a patent pending circuit that prevents bad speaker connections to be made that could cause the amplifier to short. Fig. 2. Rear panel view LINE SPEAKER INPUT L R LINE OUTPUT (BUFFERED) LEVEL LO HILDS LED SEE BELOW 12 SPEAKERS L R + + 12V POWER 120V 60Hz 3A 275 TECHNOLOGIES, INC.Sherbourn STEREO BRDG MONOMODE OUTIN+ + L R + + MUSIC TRIGGER VOLUME MIN MAX POWER Sherbour n Fig. 1. Front panel view