Sherbourn Technologies LDS16-40 User's Manual
Contents
1. ON ON ON ON ON MUSIC OUT music MUSIC MUSIC MUSIC 12 121 12 12 12 SPEAKERS R SPEAKERS SPEAKERS SPEAKERS SPEAKERS TRIGGER O O os os A J Fig 6 Connections for Bridge Mode Applications Three Year Limited Warranty Subject to the terms and conditions stated below Sherbourn Technologies Inc Sherbourn warrants to the original owner that this model LDS16 40 shall be free from defects in workmanship or materials for a term of three 3 years from its date of purchase from an Authorized Sherbourn Dealer Transfer of this product by its original owner the Owner will automatically terminate this Warranty regardless of when occurring In the event of any defect covered by this warranty Sherbourn shall provide all parts materials and labor necessary to restore the Product to its original specifications and shall return the Product to its owner at Sherbourn s expense In the alternative Sherbourn may at its sole option either replace the Product without charge or if its replacement is not commercially practicable or repair or replacement cannot be accomplished within a reasonable time Sherbourn may refund the purchase price of the Product subject where appropriate to reasonable depreciation for actual use in accordance with applicable laws in full satisfaction of its warranty obligations Sherbourn s sole obligation under this warranty sh2. amplifiers that produce heat 12 Mount the equipment in a wall or cabinet only as described in this owner s manual 13 Do not use the equipment near water for example near a bathtub washbowl kitchen sink swimming pool a wet basement etc 14 Do not place the product on an unstable cart stand tripod bracket or table The equipment is heavy and should it fall it could cause serious injury to a person and or serious damage to the equipment Caution for Installation 1 Your Sherbourn amplifier can be placed on any table or shelf It can also be custom installed in a rack and or in a piece of cabinetry or furniture of your choice It is however important that if the amplifier is going to be housed in an enclosed environment that you allow for adequate ventilation Despite the adequately sized heatsinks built into the amplifier it is still important that good ventilation be provided Do not install the amplifier directly above another heat generating component such as another amplifier without adequate ventilation 2 If your amplifier is going to be placed in an enclosed space such as an armoire it is essential that adequate ventilation be provided We strongly suggest that the shelf on which the product is being placed includes a cutout of at least twenty inches by twelve inches 50 cm by 30 cm directly under the ventilation slots on the bottom of the amplifier A similarly sized cutout should be made in the upper
3. or rear wall behind the shelf so that free air can flow from beneath the unit to the outside atmosphere Also allow a minimum of three inches 7 5 cm free space above the product and two inches 5 cm on either side of the product This combination of space will allow for a free flow of circulating air to help keep the amplifier from overheating If your cabinet includes a number of products it may be advisable to install a quiet fan to assist the cooling process 3 The dealership from which you purchased the product is an expert on custom installation procedures 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 convenience 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
4. 40 will be made discretely via cables from the outputs of your preamp to the gold plated inputs of your LDS16 40 Please ensure that the cables are installed for each channel as described on the following pages Volume Controls Two separate controls are provided for left and right volume control When functioning under the bridge mono mode only the right volume control is used for volume adjustment LDS Operation Each time the power comes on the LDS 16 40 will perform the LDS Load Detection System test sequence from zone 1 to the last zone amplifier Sherbourn s LDS technology incorporated in this product will automatically detect a short circuit in the speaker wiring and will also check for speaker s that may be configured with too low an impedance of less than 4 ohms typically During the test sequence observe the rear panel LDS LEDs for the following test results The power should be off during your installation Once your installation is complete and the unit is powered up the LDS16 40 will automatically perform the LDS Test Sequence described in the previous paragraph Please note MODE O L VOLUME i MODE L L LI IN R NE VOLUME 4 VOLUME Sherbourn DESIGNED AND TECHNOLOGIES INC Model LDS16 40 ENGINEERED IN U S A NORTH BILLERICA S A GROUP A GROUP B y y y y INPUT SELECT INPUT SELE
5. CT INPUT SELECT INPUT SELECT INPUT SELECT INPUT SELECT INPUT SELECT INPUT 1 INPUT 1 INPUT 1 INPUT 1 INPUTS INPUTS INPUTS 1 O 2 ix 3 4 5 Lx 61 7 8 MODE i MODI EE D Z L WARNING LINE SHOCK HAZARD N DONOTOPEN RISQUE DE CHO INE i VOLUME VOLUME R R R R R R R L L TRIGGER TRIGGER TRIGGER TRIGGER TRIGGER TRIGGER TRIGGER TRIGGER ON LINE ON ON ON ON UNE ON ON ON OUT muse music OUT musie Music 12 N 12 77 w SPEAKERS A SPEAKERS SPEAKERS SPEAKERS SPEAKERS R SPEAKERS SPEAKERS SPEAKERS 10 10 10 10 10 0 0 10 L L L L iL o o o o o o o o TRIGGER TRIGGER o o jo jo o jo jo jo R R R R R R R 0 Os 0 Os 0 ODs Os O O s 0 0 0 105 A A A A A A A 2 LDS LED STATUS GREEN THE AMPLIFIER IS OK FOR DRIVING THE CONNECTED LOADS BLINKING RED INDICATES THE OFFENDING ZONE S ARE IN THEIR PROTECTION MODE S SEE THE OWNER S MANUAL FOR TROUBLE WARNING REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE Fig 1 Rear Panel of LDS1640 With Eight Zones that this Test Sequence will be performed just once immediately after the unit is first powered up If LDS LEDs are all Green the test results are good If all the LDS LEDs are in green bright or dim it indicates all speakers
6. L zone signal The group A amplifiers can thus receive a Global A signal fed to the zone 1 RCA input and the group B amplifiers can receive either the same group A signal by setting zone 5 s input selector to ZONE 1 or receive its own global B signal fed to the Zone 5 RCA input With the input selection switch of a zone set to its own zone the zone amplifiers receive the signal via the RCA jacks of that zone Trigger Mode Switch On Setting the trigger mode switch to the ON position allows the LDS 16 40 to stay ON all the time None of the amplifiers will enter the standby mode The power to the amplifiers can only be turned off by turning off the front panel power switch or disconnecting the power cord Music Setting a trigger mode switch to MUSIC position sets the LDS16 40 zone amps into auto on standby power control mode Each zone amp can sense individually a very low level music signal fed to its signal input which will turn the amplifier into an active state and will play the music When the music stops and no further signal is received for more than 10 minutes the zone amp will turn into a standby mode which cuts off the power consumption substantially and the green LED will become dim The zone amp will wake up from the standby mode or sleep mode whenever the zone receives a music signal again 12V Setting the trigger mode switch of a zone amp to 12V allows the power on standby function of that zone amp to
7. Sherbourn Technologies Inc Owner s Manual for Model LDS16 40 Power Amplifier Thank you so much for your decision to purchase one of our superb Sherbourn amplifiers We take enormous pride in the design and build quality of all of our products and we are confident that our product will provide you with many years of enjoyable and trouble free service Should you have any need to call upon our services please feel free to contact us at the address shown at the end of this booklet or of course you can contact the dealership from which you purchased the product Full details of the warranty coverage provided by Sherbourn Technologies can be found at the end of this booklet Safety Instructions 1 Important Safety Instructions Please read all the safety and operating instructions shown in this manual before operating this equipment WARNING SHOCK HAZARD DO NOT OPEN AVIS RISQUE DE CHOC ELECTRONIQUE NE PAS OUVRIR 1 The lightening flash within an equilateral triangle shown above is intended to alert you to the presence of uninsulated dangerous voltage within the product s enclosure that may be of sufficient magnitude to constitute an electric shock 3 The exclamation point within an equilateral triangle shown above is intended to alert you to the presence of important operating and maintenance servicing instructions in the literature accompanying this appliance 4 Please retain this manual in a safe pla
8. UT 1 POSITION GROUP B AND 8 TO THE INPUT 5 POSITION UPPER POSITION UPPER POSITION GROUP A MUSIC 12 SPEAKERS SPEAKERS SPEAKERS SPEAKERS 10 ao o Fig 4 Settings to Operate the Amplifier in Two Separate Groups GROUP A GROUP B nat d SELECT 2 net SELECT 3 wert SELECT 4 INPUT SELECT 5 nests 6 SELECT ned SELECT 8 MONO MODE MONO MODE 2 N VOLUME VOLUME VOLUME O O TRIGGER u TRIGGER IGE INE TRIGGER TRIGGER muse OUT O Muse OUT O Q SPEAKERS R SPEAKERS SPEAKERS SPEAKERS R SPEAKERS SPEAKERS 10 10 L L R R O O os A 2 12V TRIGGER INPUT FOR ZONE 1 2 AND 4 TRIGGERING WIRE THE 12V TRIGGER OUTPUT UNDER GROUP ATO THE 12V INPUT UNDER GROUP B FOR ZONE 5 6 7 AND 8 TRIGGERING Fig 5 12V Trigger Connections SET THE MODE SWITCHES FROM ZONE 1 TO ZONE 8 TO THE BRGD POSITION AUDIO INPUTS CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8 CH1 VOLUME CH2 VOLUME CH3 VOLUME CH4 VOLUME CH5 VOLUME CH6 VOLUME CH7 VOLUME CH8 VOLUME CONTROL CONTR OL CONTROL CONTROL CONTROL CONTROL CONTROL CONTROL JODE STEREO BRDG L VOLUME VOLUME R TRIGGER TRIGGER TRIGGER TRIGGER TRIGGER
9. all be to repair or replace the product or at its option refund the purchase price as provided for hereinabove Sherbourn does not warrant against nor shall it be liable for any of the following removal installation charges shipping expenses to Sherbourn or its authorized service facility loss of use property damage of any kind or other incidental or consequential damage or losses of any kind Note Some states do not allow exclusion or limitation of consequential damages so the foregoing exclusions may not apply to you This warranty does not cover any of the following a cabinetry trim or other appearance items except where they are defective at the time of original sale and the Product is delivered for repair within the first thirty days 30 thereafter b failures arising from accident catastrophe misuse neglect or failure to properly connect and operate the product in accordance with the accompanying instruction c failures arising from improper installation of the Product or incompatibility of other components in the system of which the Product is a part failures of any kind in products 1 which have been purchased from other than Authorized Sherbourn dealers or which evidence any tampering alteration or attempted servicing by anyone other than Sherbourn or an Authorized Sherbourn Service Facility and Sherbourn shall have no liability or obligation of any kind with respect to any of the fore
10. be controlled by a 12V DC voltage connected to the 12V input jacks of group A and group B amplifiers When 12V DC is present at the 12V trigger input jacks the zone amplifiers will turn on and when the 12V disappears the zone amps will enter the standby mode momentary Under standby mode no music signal will go through that zone amps and there is no output sent to the speakers The zone amplifiers will wake up from the standby mode whenever the zone receives a 12V trigger input Note that the 12V trigger input jack of group A is not internally connected to the 12V input jack of group B A cable must be connected from the trigger output jack of A group to the trigger input jack of B group if amps in both groups are to be triggered simultaneously by only one 12V trigger source Speaker Terminals and Speaker Loads Each LDS16 40 provides one set of speaker terminals per zone for left and right speaker connections When operating a zone amplifier under a stereo or mono mode use only a speaker of 4 ohms or greater impedance for your installation But when operating in BRGD bridge mode use only a speaker of 8 ohms or greater impedance Stereo Mono Bridged Switch Stereo Setting the switch to STEREO operates a zone amplifier in a regular 2 channel stereo mode Mono Setting the switch to MONO sums the left and right inputs together and plays the same signal to both the left and right speakers Bridging Setting the switch t
11. ce for future reference about safety and operating matters 5 Adhere to all warnings and follow all operating instructions 6 Warning To reduce the risk of fire or electrical shock do not expose this equipment to rain or moisture There are no user serviceable parts inside Refer servicing to qualified personnel 7 Caution To prevent electrical shock do not use this polarized plug with an extension cord receptacle or other outlet unless the blades can be fully inserted to prevent blade exposure 8 For added protection for this product during a lightening storm or when it is left unattended and unused for long periods of time it is recommended that you unplug the unit from the wall outlet This will prevent damage to the product due to lightening or power line surges 9 Do not use attachments not recommended in this owner s manual as they may cause hazards 10 Locate the equipment for proper ventilation For example the product should never be allowed to operate while positioned on a bed rug sofa or any such surface where proper ventilation is not possible Nor should the unit be placed in a built in installation such as a cabinet or armoire etc in such a way as to impede the air flow Always ensure adequate ventilation openings please see later comments regarding such an installation 11 Locate the product away from heat sources such as stoves heat registers radiators or other appliances including other
12. connected to the amp are greater than 4 ohm and no short circuit exists in the speaker wiring The amplifier is safe to drive the speakers The LDS LED of a zone will be in full brightness if the trigger switch of that zone is set to ON or to MUSIC if the amp is receiving a music signal or to 12V if a 12Vdc trigger input is fed to the trigger input jack Otherwise it shall remain in low level green For those zones with LDS LED in full brightness their speakers are automatically connected by internal relays if an LDS LED is dim the internal relay of that zone amp does not get connected to the speaker If any of the LDS LEDs are Red it is an indication that on the offending zone s either the load is too low or a short circuit exists Indicates the speaker connected to that zone amp either has a short circuit connection or speaker impedance that is too low less than 4 ohms typically for the amplifier The amplifier repeats the LDS test on that zone and the LDS LED keeps flashing red The amplifier will not be connected to the speaker unless the fault condition is corrected See the troubleshooting section on page 5 if you encountered this problem Input Selection Switches The zone amplifiers of LDS16 40 are split into two groups A and B with zone to 4 being the A group and 5 to 8 the B group Except for zone 1 each zone contains an input selection switch allowing it to receive either a GLOBAL main signal or a LOCA
13. el will output if speakers are connected at left and right for stereo mode listening Set the mode mode switch to stereo for correction SET MODE SWITCH SET MODE SWITCH TO BRGD TO BRGD GROUP A INPUT SELECT 1 2 INPUT 1 MONO ODE 0 L AUDIO R INPUT L OA i RO TRIGGER MUSIC 12 SPEAKERS oO SPEAKERS 10 L TRIGGER OUT USE FOR L VOLUME o o Oo Los oO 10 A USE FOR R VOLUME Fig 2 Bridging Two Zone Amplifiers in a Stereo Installation AUDIO SET THE INPUT OF ZONE 2 3 4 AND 5 TO SET THE INPUT OF ZONE 6 7 AND 8 TO INPUT THE INPUT 1 POSITION UPPER POSITION THE INPUT 5 POSITION UPPER POSITION GROUP A INPUT INPUT 1 GROUP B y CT INPUT INPUT 5 LOCAL L TRIGGEI TRIGGER TRIGGER TRIGGER LINE ON ON ON ON Music OUT music Music Music O Music Music 10 7 12 12 12 SPEAKERS R SPEAKERS SPEAKERS SPEAKERS SPEAKERS SPEAKERS SPEAKERS 10 10 10 10 10 0 O lo lo lo Jo o TRIGGER o o O o 0 R R R R R R 10 s 10 10 lps 10 105 10 0 Ds 19 A A 2 Fig 3 Global Setting to Play The Same Music Through All Zones SET THE INPUT OF ZONE 5 TO THE LOCAL POSITION AUDIO LOWER POSITION AUDIO INPUT SET THE INPUT OF ZONE 2 3 INPUT SET THE INPUT OF ZONE 6 7 GROUP A AND 4 TO THE INP
14. going losses types of failures To obtain service under this Warranty the Owner must first obtain from Sherbourn a Return Authorization Number and must then at the owner s expense i arrange for any necessary de installation of the Product and ii deliver or ship the Product properly packaged and clearly identified with the Return Authorization Number prepaid and insured to Sherbourn at the address shown below or to an Authorized Sherbourn Service Facility In addition the Owner must provide evidence that the Product is at the time of delivery within the scope of this Warranty by including the ORIGINAL dated sales receipt with the Product when submitted for repair Safeguard your original sales receipt as it may be required to validate Warranty coverage The owner is solely responsible for payment of all expenses for removing the Product from its installation delivering it to Sherbourn or an Authorized Sherbourn Service Facility and reinstalling it following repair as well as for any repairs made to Products which are subject to the exclusions noted above In order to learn the name and address of the nearest Authorized Sherbourn Service Facility obtain a Return Authorization Number and shipping instructions or obtain answers to any other questions you may have concerning this Warranty you may telephone Sherbourn between the hours of 9 00 am and 5 00 pm Eastern Standard Time Monday through Friday at 978 663 7385 o
15. in the house you must use a three pin adapter plug to earth ground which is the E earth pin of the power cord connected to this product 3 Do not overload wall outlets extension or integral convenience receptacles as this could result in a risk of fire or shock Operating Voltage The LDS16 40 amplifier is factory set for 110V 120V 60 HZ or 230V 50HZ AC operation according to the country for which the unit was manufactured 230V in European Union countries in compliance with CE regulations The operating voltage cannot be changed by the user and any attempt to do so may risk of causing damage to the amplifier and will void the warranty Care of the Product Clean the product by dusting with a dry cloth Do not permit objects of any kind to be pushed and or fall into the product through the enclosure openings Front Panel Description The front panel houses the main Power ON OFF switch A blue power LED will illuminate when the LDS16 40 is ON and will dim when all zone amplifiers are in the Standby mode The LED will only extinguish when the Power ON OFF switch is in the OFF position or when the LDS16 40 is disconnected from the electrical outlet Rear Panel Connections The LDS16 40 has been designed to provide multiple stereo zones with identical performance and features The following descriptions apply to all zones The connections of the audio signal between your preamp control center and your LDS 16
16. o BRGD operates a zone amplifier in the bridged mode which turns the output of the left channel into the same signal as the right channel but in the opposite polarity Under this bridged mode a speaker of 8 ohms minimum impedance can be connected between the positive marked polarity of the right speaker terminal and the positive polarity marked of the left speaker terminal in order to receive a two times output voltage for higher power output The positive polarity of the speaker should be connected to the terminal of the right channel for the speaker to be in the correct phase Troubleshooting Symptom No sound from one zone One channel out Possible Cause Solution Incorrect input setting Check setting of the Global Local switch Bad speaker connection LDS LED in bright green swap speakers from other zone to identify the problem Bad input connection Swap inputs from other zone to identify the problem Speaker output shorted or too low speaker impedance LDS LED shall flash red turn off unit power swap speakers from other zone then turn on the power again to identify the problem Trigger switch set to 12V Feed a 12V trigger signal to turn unit on or set the switch to Music or on position Level adjust pot set too low Turn both L and R level control up Can possibility be any of the above Check through above solutions Mode switch set at BRGD Only R chann
17. r write to our Service Department at Sherbourn Technologies Inc 19 3A Sterling Road North Billerica MA 01862 This warranty gives you specific legal rights and you may also have other rights which vary from state to state If this product has been purchased outside of the United States of America you should contact your local dealer or distributor to determine the warranty coverage provided in your country Sherbourn Sherbourn Technologies Inc 19 3A Sterling Road North Billerica MA 01862 Tel 978 663 7385 Fax 978 663 7389 Web www sherbourn com
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