Two-Zone 140V (Bridged) Wiring

The illustration below shows the wiring for a single channel of a DS70 being used in a non-standard 140 volt mode (which can be used with custom equipment where exceptionally long cable runs are required. Because each transformer within the DS70 can deliver up to 70 volts, so to get a 140 volt output, two of the transformers have to be bridged

(i.e., connected in series). Since the two input channels are bridged, a signal of up to 240 watts (into 8 ohms) can be received from the power amplifier. In this kind of setup, the output level controls of the power amplifier can be used to control the volumes of each of the two zones. For volume control of each of the speakers within a zone, optional autotransformers can be used (see Appendix A on page 9 of this manual for more information). Note that four speakers are being used for purposes of illustration only— any number of speakers (up to the rated wattage of the power amplifier or DS70) can in fact be used in each zone. Note also that the the remaining two channels of the DS70 can be used to provide the same or different output voltages.

+

-

+

-

+

-

+

-

RISK DO NOT OPEN

DS70

+

– INPUT +

 

 

 

CAUTION

 

 

 

 

 

 

OF ELECTRIC SHOCK

 

 

 

 

 

 

 

SPEAKER DISTRIBUTION

 

 

 

 

BRIDGE 70V

 

CH1

 

CH2

70V 25.2V COM COM

70V

25.2V

COM COM

 

BRIDGE

 

 

 

 

 

SAMSON

 

 

 

 

SAMSON TECHNOLOGIES CORP.

 

140V

100V

NC

SPEAKER DISTRIBUTION SYSTEM

CH1 OUTPUT

 

CH2 OUTPUT

 

 

 

 

BRIDGE 100V

 

 

 

 

 

+

– INPUT

+

CH3

 

 

CH4

 

BRIDGE

 

 

SERIAL NUMBER

 

 

 

 

 

 

AVIS

 

RISQUE DE CHOC ELECTRONIQUE

 

 

NE PAS OUVRIR

 

DO NOT EXPOSE THIS EQUIPMENT

 

 

TO RAIN OR MOISTURE

 

BRIDGE 70V

 

70V 25.2V COM COM

70V

25.2V

COM COM

 

140V

100V

NC

CH3 OUTPUT

 

CH4 OUTPUT

 

BRIDGE 100V

 

 

-

+

+

-

-

+

+

-

CAUTION

!

 

 

 

 

 

 

 

 

 

 

RISK OF ELECTRIC SHOCK

 

 

 

 

 

 

 

 

 

 

DO NOT OPEN

 

 

 

 

 

 

 

 

 

 

USE CLASS 2 WIRING

 

 

 

 

 

 

 

 

 

 

 

emc

 

-

+

4Ω 120W

+

-

 

-

+

+

-

 

 

CH4

CH3

AC USA & CANADA 115V - 60Hz

CH2

4Ω 120W

CH1

 

 

-

MAX. LOAD

+

INLET EUROPE & UK 230V - 50Hz

 

+

MAX. LOAD

 

 

 

 

MONO 8Ω

 

650W MAX.

 

-

 

EUR . USA . JPN

 

 

 

 

CAUTION:

 

ATTENTION:

 

MONO 8Ω

 

AVIS;

 

 

 

 

 

DISCONNECT SUPPLY CORD

 

DEBRANCHER AVANT DE

 

 

 

RISQUE DE CHOC ELECTRIQUE

 

 

 

 

 

BEFORE CHANGING FUSE.

 

REMPLACER LE FUSIBLE.

 

 

 

NE PAS OUVRIR

BRIDGE

 

 

 

FOR CONTINUED PROTECTION

 

UTILISERUN FUSIBLE DE

 

 

 

DO NOT EXPOSE THIS EQUIPMENT

 

 

 

 

 

AGAINST RISK OF FIRE, REPLACE

 

RECHANGE DE MEM TYPE.

 

 

 

TO RAIN OR MOISTURE.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ONLY WITH SAME TYPE OF FUSE.

USA & CANADA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OFF

ON

 

 

 

FUSE

T 8A/125V (115V)

 

 

 

 

 

 

 

CH4 R

 

CH3 R

EUROPE AND UK

 

CH2 L

 

CH1 L

 

 

 

 

 

 

 

 

 

 

 

 

T 6.3A/250V (230V)

 

 

 

 

 

 

 

 

 

 

 

 

 

SERVO 4120

QUAD AMPLIFIER

SERIAL NUMBER

SAMSON

SAMSON TECHNOLOGIES CORP., U.S.A.

BRIDGE

OFF ON

10

Page 10
Image 10
Samson DS70 owner manual Two-Zone 140V Bridged Wiring