powersoft Digam K4 - Loudspeaker Output Connections; 1.6 Connecting Loudspeaker Outputs

10
PhoenixContacts
GMSTB2,5/2-ST
K3I-K2I
modelonly
K3IandK2ImodelrequiresPhoenixContactsGMSTB2,5/2-ST connectorsforoutputconnections,thepolarityisshowed
inthefigurebelow.InK3Istereoendbridgemodeoutputfollowwiringshowonfigure1.6.1.
figure1.6.2
1.6ConnectingOutputs
Warning:therearelethalvoltagesattheloudspeakerconnectorswhentheamplifieristurnedon.Topreventany
damagesturntheamplifieroffbeforeconnectingtheloudspeaker
Outputconnectorsaremadevianeutrikspeakonconnectors.Consultthewiregaugecharttofindasuitablewiregaugeto
minimizepoweranddampingfactorlossesinthespeakercables. Theoutputscanalsoworkonbridgemode.Foreach
devicethe1+and2+pinsofspeakonconnectorareconnectedinsideandhavetobeconsideredthepositiveoutputofthe
channel;the1-and2-pinsofspeakonconnectorareconnectedinsideandhavetobeconsideredthenegativeoutputof
thechannel.
Note:ChannelBisalwayspolarityreversedoutputstage,butpolaritycompensatedbyfeedingtheminuspinsofthe
channelBoutputwiththeoutputvoltage.Channel A isconnectedinthepolaritymode.Byhavingchannel A andB
operatinginoppositepolarity,theenergystorageinthepowersupplyismoreefficient. Thisissignificantforsignalsbelow
100Hz(subbassetc.)andimprovesthepowerbandwidth. Besuretousebalancedinputsonallmeasurement
equipment(alsooscilloscopeprobes)inyouarebenchtesting.
figure1.6.1
OUT (-) OUT (+)
CH1
OUT
stereomode
bridgemode
+
_
2+
2-
1-
1+
CH2
OUT
+
_
2+
2-
1-
1+
CH1
OUT
+
_
2+
2-
1-
1+
CH2
OUT
2+
2-
1-
1+
OUT2
IN2 IN1
OUT1
T
U
R
N
T
O
L
O
C
K
T
U
R
N
T
O
L
O
C
K
“WARNING
To reduce The Risk of Fire
or Electric Shock, do not
Expose this Apparatus
to Rain or Moisture”
LINK
ON OFF
CLASS2WIRING