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10 

 

Technical specifications 

Audio 

Parameter 

Value 

Note 

Balanced input connectors 

3-pin XLR, gold-plated 

Case=Gnd, Pin1=Gnd, 
Pin2=Hot(+), Pin3=Cold(-) 

Balanced input impedance 

10 KOhm 

AC-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 

2 V 

200 W/8 Ohms 

Voltage gain 

26 dB 

 

Output connectors 

4 insulated binding posts, gold-
plated 

Will accept bare wire ends up 
to 5 mm diameter. 

Output power, 8 Ohms 

2 x 200 W 

1 kHz, 1% THD+N 

Output power, 4 Ohms 

2 x 375 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-wgt. 

THD+N, 1 W/4 Ohms 

0.006% 

A-wgt. 

THD+N, 100 W/8 Ohms 

0.01% 

A-wgt. 

THD+N, 180 W/8 Ohms 

0.07% 

A-wgt. 

THD+N, 275 W/4 Ohms 

0.07% 

A-wgt. 

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-17. 

Summary of Contents for SDA 2175

Page 1: ...SDA 2175 Compact Analog Power Amplifier Owner s Manual...

Page 2: ...ns 5 Introduction 6 Front panel 6 Controls 6 Indicators 6 Rear panel 7 Mains Connector 7 Loudspeaker connectors 7 Input connectors 8 Balanced inputs 8 Unbalanced inputs 9 Trigger connectors 9 Cleaning...

Page 3: ...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 Vo...

Page 4: ...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 voltag...

Page 5: ...he mains voltage setting for your SDA 2175 can be changed ONLY BY A QUALIFIED TECHNICIAN WARNING Connect the power input only to the AC source printed on the label The warranty will not cover any dama...

Page 6: ...strumentation 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 217...

Page 7: ...ins 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 termina...

Page 8: ...nced 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...

Page 9: ...he 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...

Page 10: ...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 Frequen...

Page 11: ...on 1 5 W 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...

Page 12: ...epresentative 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 Denm...

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