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Samson DS70 manual

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Table of contents for the manual

  • Page 1

    ® O WNERS MANUAL SPEAKER DISTRIBUTION SYSTEM[...]

  • Page 2

    Intr oduction 3 DS70 Features 3 Guided T our 4 Modes of Operation 5 Wiring Diagrams 6 Four-Zone 70V (Unbridged) 6 Two-Zone 70V (Bridged) 7 Four-Zone 25.2V (Unbridged) 8 Two-Zone 100V (Bridged) 9 Two-Zone 140V (Bridged) 10 Appendix A: Block Diagram 11 Specifications 12[...]

  • Page 3

    Intr oduction / DS70 Featur es Congratulations on purchasing the Samson DS70 Speaker Distribution System! The DS70 provides four high-quality toroidal step-up transformers in a single chassis. Each transformer can accept a nominal-level signal from any standard power amplifier, and can then convert it to a 70 volt, 25.2 volt, or 100 volt line-level[...]

  • Page 4

    Guided T our 1: Channel inputs (1 - 4) - Connect output signal from a power amplifier to these four sets of binding post input connectors, making sure to follow the polarity markings silk-screened above each connector. When using the DS70 in two-zone (bridged) modes of operation, a bridge connection must be physically made between two channel input[...]

  • Page 5

    About Distributed Sound A distributed sound system (sometimes known as a “ constant voltage ” system) allows a single power amplifier to drive multiple loudspeakers over a single high-impedance line. Used commonly in public address and paging systems (such as in schools, houses of worship, hotels, factories, stores, and other places of business[...]

  • Page 6

    6 Four-Zone 70V (Unbridged) Wiring The illustration below shows the wiring for a single channel of a DS70 being used in standard 70 volt mode. In this kind of setup, the output level controls of the power amplifier can be used to control the volumes of each of the four zones. For volume control of each of the speakers within a zone, an optional aut[...]

  • Page 7

    7 The illustration below shows the wiring for two channels of a DS70 being used in Bridged 70 volt mode. 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 t[...]

  • Page 8

    CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN ! USE CLASS 2 WIRING AVIS; RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. emc EUR . USA . JPN BRIDGE OFF ON CH4 R CH3 R CH4 CH3 4 Ω 120W MAX. LOAD -++- CH2 L CH1 L -++- BRIDGE OFF ON SAMSON SERIAL NUMBER SERVO 4120 QUAD AMPLIFIER SAMSON TECHNOLOGIES CORP., U.S.A[...]

  • Page 9

    Two-Zone 100V (Bridged) Wiring The illustration below shows the wiring for a single channel of a DS70 being used in 100 volt mode. Because each transformer within the DS70 can deliver up to 70 volts, so to get a 100 volt output, two of the transformers have to be bridged (i.e., connected in series). Since the two input channels are bridged, a signa[...]

  • Page 10

    Two-Zone 140V (Bridged) Wiring 10 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 tr[...]

  • Page 11

    11 Note: The block diagram below shows the signal flow for a single channel of the DS70. Appendix A: Block Diagram Po w e r amplifier DS70 Speaker transf ormer Optional local s witcher and v olume control[...]

  • Page 12

    12 Specifications 1: Input Impedance 4 Ω (non-bridged modes) 8 Ω (bridged modes) 2 Ω (dual mode) 2: Maximum Power Each Input 120 Wrms (non-bridged modes) 240 Wrms (bridged and dual modes) 3: Output 70 V, 25.2 V (non-bridged), 100 V, 140 V (bridged) 4: Insertion Loss -0.55 dB @ 1kHz 5: Frequency Response Flat, +0 dB, -3 dB 20 Hz to 20 kHz, ref[...]

  • Page 13

    Produced by On The Right Wavelength for Samson Technologies Corp. Copyright 1998, Samson Technologies Corp. Printed January 1998 Samson Technologies Corp. 575 Underhill Blvd. P.O. Box 9031 Syosset, NY 11791-9031 Phone: 1-800-3-SAMSON (1-800-372-6766) Fax: 516-364-3888[...]