Lyngdorf Audio SDA 2175 User's Manual
Contents
1. Balanced input impedance 10 KOhm AG coupled Balanced input CMRR 40 dB 20 Hz 20 kHz Unbalanced input connectors Phono gold plated Case Gnd Tip Hot Unbalanced input impedance 100 KOhm AC coupled Max input voltage 15Vp AC 0 20 VDC Input sensitivity 2V 200 W 8 Ohms Voltage gain 26 dB Output connectors 4 insulated binding posts gold Will accept bare wire ends up plated to 5 mm diameter Output power 8 Ohms 2 x 200 W 1 kHz 1 THD N Output power 4 Ohms 2 x375 W 1 kHz 1 THD N Nominal load impedance 4 8 Ohms It is safe to operate the amplifier with no load Frequency response 0 3 Hz 33 kHz 3 dB points 8 Ohms load Frequency response 0dB 0 2dB 20 Hz 20 kHz 8 Ohms load Frequency response 0 2dB 0dB 20 Hz 20 kHz 4 Ohms load Output impedance 0 035 Ohms 20 Hz 1 kHz Output impedance 0 4 Ohms 20 kHz THD N 1 W 8 Ohms 0 004 A wat THD N 1 W 4 Ohms 0 006 A wot THD N 100 W 8 Ohms 0 01 A wot THD N 180 W 8 Ohms 0 07 A wot THD N 275 W 4 Ohms 0 07 A wot S N ratio 117 dB A wgt ref 200 W 8 Ohms Channel separation 84 dB 1 kHz 200 W 8 Ohms Peak output current 40 A Output common mode voltage 35 VDC Ref Ground The amplifier can not be used in bridged mono mode Output DC voltage 5 mV All audio measurements except frequency response are measured with a 20KHz low pass filter in accordance with AES 172. Protection Parameter Value Note Grounding Mains earth chassis and audio ground are connected internally Output short circuit current 40 A Output DC voltage 5 VO lt 0 1 Hz Over temperature All heatsinks and mains transformer Mains Parameter Value Note Mains input connector IEC 320 cold type Mains lead supplied Mains voltage range 100 120 VAC 50 6 0Hz 115 V version Mains voltage range 200 240V AC 50 60Hz 230 V version Internal mains fuse 8 Amp 115 V version Internal mains fuse 4 Amp 230 V version Power consumption 1 5W STANDBY mode Power consumption 35 W OPERATE mode no output Power consumption 116 W 2 x 37 5 W 4 Ohms Power consumption 820 W 2 x 300 W 4 Ohms Trigger Parameter Value Note TRIGGER IN connector 3 5 mm 1 8 mono jack Case Gnd Tip Input TRIGGER BYPASS connector 3 5 mm 1 8 mono jack Case Gnd Tip Output TRIGGER IN impedance 10 Kohm TRIGGER IN sensitivity 4 VDC or 4Vp AC Positive DC voltage on Tip AC gt 50 Hz Max input voltage 25 Vp Mechanical Parameter Value Note Width 450 mm 17 72 Depth 340 mm 13 39 Excluding loudspeaker connectors Depth 361 mm 14 21 Including loudspeaker connectors Height 88 8 mm 3 5 Excluding feet Height 100 6 mm 3 96 Including feet Net weight 15 5 kg 34 Ib Shipping weig
3. AND PACKING MATERIALS for future use or in the unlikely event that the unit needs service If this unit is shipped without the original packing damage could occur and void the warranty Accessories The following items are included in the accessories kit 1 One mains cord 2 This manual 3 Customer registration form Operating voltage The SDA 2175 is available in a version for 115V mains voltage and in a version for 230V mains voltage Check the label on the SDA 2175 rear panel and verify that you have the version with the proper voltage for your area The 115V version requires a mains voltage of 100V 120V at 50 60Hz with a current rating of 8A The 230V version requires a mains voltage of 200V 240V at 50 60Hz with a current rating of 4A The mains voltage setting for your SDA 2175 can be changed ONLY BY A QUALIFIED TECHNICIAN the label The warranty will not cover any damage caused by WARNING Connect the power input only to the AC source printed on connecting to the wrong type of AC mains Product Registrations Please record the serial number of your amplifier here for future reference The serial number is printed on the label on the SDA 2175 rear panel You will need this serial number should you ever require service for your SDA 2175 power amplifier SDA 2175 serial number Lyngdorf Audio so that we can register you as owner of the unit and keep you informed of future upgrades of the product A Please fil
4. changing any connections to its inputs or outputs When the SDA 2175 is operating there is 35V DC on its output terminals with reference to ground gt gt gt Input connectors The SDA 2175 has input sockets for both balanced and unbalanced signals but only one may be used at a time The XLR and phono sockets are internally connected in parallel so only one set of the connectors should be connected externally ALWAYS use EITHER the XLR inputs OR the phono inputs NEVER use both at the same time AMPLIFIER BALANCED UNBALANCED Fig 3 SDA 2175 Input configuration Balanced inputs The balanced XLR inputs are wired in accordance with IEC268 Pin 1 Chassis and ground Pin 2 Hot Pin 3 Cold Shell Chassis and ground When the balanced inputs are used with a balanced source the input selector switch MUST be set to the BALANCED position The switch position can be changed with a small screwdriver If any cables are connected to the unbalanced inputs remove these before the switch is put in the BALANCED position We recommend the use of the balanced inputs whenever possible as balanced signals are much less sensitive to noise than unbalanced signals Unbalanced inputs The unbalanced RCA inputs are wired in accordance with normal practice Shell Chassis and ground Pin Hot When the unbalanced inputs are used the input selector switch MUST be set to the UNBALANCED position The switch posi
5. EN Explanation of symbols Exclamation symbol The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance service instructions in the literature accompanying the product Lightning symbol The lightning with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated Dangerous Voltage within the products enclosure that may be of sufficient magnitude to constitute a risk of electrical shock to a person Important safety instructions 1 Read these instructions carefully before installing or operating this apparatus 2 Keep these instructions 3 Heed all warnings 4 Follow all instructions 5 Do not use this apparatus near water 6 Clean only with a dry cloth 7 Do not block any ventilation openings Install in accordance with the manufacturer s instructions 8 Do not install near any heat sources such as radiators heat registers stoves or other apparatus that produce heat 9 Do not defeat the safety purpose of the grounding type plug A grounding type plug has two pins and a third grounding prong The third prong is provided for your safety If the provided plug does not fit your outlet consult an electrician for replacement of the obsolete outlet 10 Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatu
6. SDA 2175 Compact Analog Power Amplifier Owner s Manual Table of Contents WARNINGS AS RN as 3 Brplanaton ok symbolsk A A cie 3 ExEla matones RR 3 Lightning symbol sa E di 3 Important s fety INSERUCLIONG vos daa SST 4 Unpacking the SPA IB seres E IA AAA ATAR 4 PNCCESSOTICS A Gets AA epee sale 5 A sees NE 5 Produc Restad sv 5 A SS SENSE SEE SE SENESTE SES ES SES SEES RETTE SSOS REE ES SRETRE 6 Frontpanel faseire areas 6 COMO EE EE A ESEESE EE EE N e Ena 6 NO 6 ON 7 Mains Connect OF id AAA ed nd 7 Loudspeaker connectors meee eror E eSa oE EE ar eee PrE EAEE E E a tse 7 PUE COTS LOS EE EE A TS NE SAR 8 Balanced MUS spasere SR 8 Unbalan ed m puts it A e E E i 9 Trigger COMME COTS Hie E E was ad dau E R A Pan ao E vad E EE 9 CHEATS and M OAA E or 9 Always unplug the unit from the electrical outlet before cleaning oooocononccnncnonccnocanonnnoonnnanncnnnnnonccnnos 9 Technical Specifications senesini ei E EE EE E E des E R E a 10 PE EEE EE EE a a E EE ae Saag ana Nr Me De 10 Protection 5 vass 11 NN ABTS SEERE ae cence sided EE EN ENE 11 TALE ener 11 Mech nical ap 11 Technical assistance tl ai dentale 12 UD 12 WARNINGS TO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCK DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE CAUTION TO REDUCE THE RISK OF ELECTRICAL SHOCK DO NOT REMOVE COVER NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED PERSONNEL CAUTION RISK OF ELECTRICAL SHOCK DO NOT OP
7. ht 17 5 kg 39 Ib 11 Technical assistance If you have any problems with or questions regarding your Lyngdorf Audio product please contact Lyngdorf Audio or your nearest representative Support Please check the Lyngdorf Audio Denmark website under Support for latest version of control software newest version of this document and Questions and Answers Lyngdorf Audio Denmark Nordhavnsvej 12 DK7800 Skive Denmark Phone 45 46 91 10 90 Phone 45 86 27 7500 Fax 45 86 27 45 00 E mail info Q Iyngdorf com Web http www lyngdorf com
8. l in the enclosed Customer registration form and submit it to Introduction Lyngdorf SDA 2175 is a compact high performance analog switch mode amplifier utilizing some of the circuit topologies originally developed for the Lyngdorf Millennium and M2150 amplifiers Due to the switch mode topology with an efficiency of up to 85 the SDA 2175 will provide its output power with minimal heat dissipation A massive power supply with a 650VA toroidal transformer and more than 40000 microF capacitors ensures that the SDA 2175 can deliver the current to drive even the most demanding loudspeakers The SDA 2175 has 2 gold plated XLR connectors accepting balanced input signals and 2 gold plated phono connectors for unbalanced signals The input signal is fed to the power amplifier circuit via an AC coupled true instrumentation type input amplifier Except for the input amplifier the SDA 2175 is fully DC coupled with no bypass capacitors or DC servos to degrade performance The protection circuitry in the SDA 2175 shuts down the unit in case of over temperature DC voltage on the outputs and too high output current The amplifier will resume normal operation when the fault condition is no longer present A trigger input and bypass on 3 5 mm minijack connectors allow the SDA 2175 s standby mode to be controlled remotely Front panel LYNGDORF OPERATE O Power SDA 2175 Semi Digital Amplifier equilog Fig 1 SDA 2175 front panel Con
9. s Do not use this unit with a damaged cord or plug 11 Only use attachments and accessories specified by the manufacturer 12 Use only with cart stand tripod bracket or table specified by the manufacturer or sold with the apparatus When a cart is used use caution when moving the cart apparatus combination to avoid injury from tip over 13 Unplug this apparatus during lightning storms or when unused for long periods of time 14 Connect only to the proper mains voltage 15 Do not connect any output from the amplifier to any other amplifier s output or any other voltage source 15 To avoid electrical shock make sure that no conductive part of the loudspeaker wiring is exposed while the amplifier is operating Do not connect loudspeakers with uninsulated terminals to the amplifier 17 Refer all service to qualified service personnel Service is required when the apparatus has been damaged in any way such as when the power supply cord or plug are damaged liquid has been spilled or objects have fallen into the apparatus the apparatus has been exposed to rain or moisture does not operate normally or has been dropped Unpacking the SDA 2175 Carefully remove the unit and accessory kit from the carton visually check for shipping damage Contact both the shipper and Lyngdorf Audio immediately if the unit shows any sign of damage from mishandling All Lyngdorf Audio equipment is carefully inspected before leaving our factory KEEP SHIPPING CARTON
10. tion can be changed with a small screwdriver The switch must be changed to the unbalanced position before any connections are made to the RCA connectors Trigger connectors The SDA 2175 is equipped with TRIGGER IN and TRIGGER BYPASS sockets These are ordinary 3 5 mm mono mini jack sockets When TRIGGER IN is left unconnected the SDA 2175 will go into OPERATE mode when power is applied If there is a plug in the TRIGGER IN socket the SDA 2175 standby mode is controlled by the voltage on the plug With no voltage applied the SDA 2175 will go into standby mode If a DC voltage of 5 24V or a 50Hz AC voltage of 4 17Vrms is applied the SDA 2175 will go into OPERATE mode TRIGGER BYPASS is for daisy chaining a number of SDA 2175 and controlling them via the same signal Connect the control signal to TRIGGER IN on the first SDA 2175 and connect its TRIGGER BYPASS to TRIGGER IN on the next unit etc Cleaning and maintenance Always unplug the unit from the electrical outlet before cleaning This unit does not require any regular maintenance except to keep its exterior clean Simply wipe its exterior with a clean soft cloth A small amount of non abrasive cleaner may be used on the cloth to remove any excessive dirt or fingerprints Do not use abrasive cleaners Technical specifications Audio Parameter Value Note Balanced input connectors 3 pin XLR gold plated Case Gnd Pin1 Gnd Pin2 Hot Pin3 Cold
11. trols Mains switch Turns the power to the unit on or off Indicators OPERATE Indicates the operational status of the SDA 2175 Off The SDA 2175 is in standby mode controlled via the TRIGGER input Flashing The SDA 2175 is in soft start mode or the protection circuit is engaged On The SDA 2175 is operating normally POWER Illuminates when power is applied to the SDA 2175 and the mains switch is ON Rear panel LYNGDORF LYNGDORF dead HAZARD DO NOTE OPEN OK O MOD 0 0 I Y oe IX LEFT Rx y md amp l SPEAKERS WARNING VOLTAGE ON ALL TERMINALS Fig 2 SDA 2175 rear panel Mains Connector Mains voltage to the SDA 2175 is applied via an IEC320 type connector The supplied cable with safety ground should be used to connect the SDA 2175 to a mains outlet WARNING Connect the power input only to the AC source printed on the label The warranty will not cover any damage caused by connecting to the wrong type of AC mains gt Loudspeaker connectors The SDA 2175 loudspeaker connectors accept banana plugs spades or bare wire ends up to 5 mm in diameter Connect the wires from each loudspeaker to each channel s and terminals Do not make any other connections to the output terminals The loudspeaker cable is inserted into the slot in the loudspeaker terminal and the terminal is tightened firmly WARNING Always disconnect the SDA 2175 from the mains before
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