Introduction / DS70 Features
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 output for use in
paging and public address systems and wherever long cable runs and multiple speakers
are required. Particularly well-matched to the Samson Servo Quad 4120 and Servo
Quad 4060 power amplifiers (which offer four discrete outputs), the DS70 can also be
used with any standard stereo or mono power amplifier delivering a signal of up to 120
watts per channel (into 4 ohms).
In this manual, we’ll provide you with an overview of DS70 features, followed by a
guided tour of its rear panel and a general discussion of the theory and application of
distributed sound. Also included is a series of wiring diagrams, a block diagram, and full
specifications. You’ll also find a warranty card enclosed—please don’t forget to fill it out
and mail it so that you can receive online technical support and so we can send you
updated information about this and other Samson products in the future.
SPECIAL NOTE: Should your DS70 ever require servicing, a Return Authorization
number (RA) is necessary. Without this number, the unit will not be accepted. Please
call Samson at 1-800-372-6766 for a Return Authorization number prior to shipping your
DS70. Please retain the original packing materials and, if possible, return the DS70 in
its original carton and packing materials.
DS70 Features
• Used in conjunction with quality power amplifiers and speaker transformers, the
DS70 delivers audio fidelity far exceeding that usually obtained from high-impedance
distributed sound systems.
• No external power required.
• Flexible wiring configuration allows the DS70 to deliver various output level voltages,
including 70 volts, 25.2 volts, and 100 volts.
• Four independent channels of operation. Each channel can receive a separate
input signal (up to 120 watts) and each can output a signal at any of the available
voltages.
• Non-bridged modes of operation deliver up to 120 watts of power to each of four
discrete zones. Bridged modes of operation deliver up to 240 watts of power to each
of two discrete zones.
• A unique “Bridged 70 Volt” mode enables the use of two discrete
transformer-isolated lines which receive the same input signal. This not only
allows the level of each zone to be controlled independently, it also ensures that a
line failure in one zone does not affect the other one.
• Provision for custom 140 volt output where exceptionally long cable runs are
required.
• Binding post inputs and shrouded screw terminal outputs for convenient and reliable
connection to power amplifiers and speaker systems.
• Included heavy-duty rack ears allow the DS70 to be mounted in a standard 19" rack
(taking just two rack spaces), making it easy to integrate into any existing system.
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