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Introduction
Thank you for purchasing the ZM series mixer/amplifier from Samson Technologies! The ZM series mixers
provide an ideal solution for small to medium size commercial sound system installations. This manual cov-
ers two models: the ZM75 and the ZM125. Both ZM series models feature a built in constant voltage power
amplifier capable of running at 25, 70 or 100 volts or at low impedance 4-ohm operation. The ZM75 pro-
vides 75 watts, while the ZM125 provides 125 watts of clean power. Six input channels with individual level
controls are provided so connecting sound sources is simple thanks to the available XLR, 1/4-inch and RCA
connectors. In addition, both models feature five selectable speaker Zone outputs. The ZM75 and ZM125
are ideal for distributing music and announcements throughout different rooms in an installation and the
dedicated paging microphone input allows you to setup a distant paging station (for a hostess in the res-
taurant, for example). There’s even an onboard Chime, with four selectable tones, to alert the listeners of an
upcoming page. For businesses that want to improve their customers telephone experience, a MOH (Music
on Hold) facility is also included. When interfaced with a business telecom system, music or valuable pre-
recorded announcements are heard while customers are on Hold. To control the overall tonal response of
the sound system, the ZM series employ a seven-band graphic equalizer. A Master level control and five seg-
ment level meters allow you to set a clean signal at the correct volume. For added flexibility you can add the
optional Samson TCM-3 sound module with FM tuner and CD player that can play MP3 recordings. The ZM75
and ZM125 can be table-top or mounted in a standard 19-inch equipment rack using the included rack
mount ears. The sleek black finish matches just about any décor, plus the steel chassis adds to it durability
and reliability. Perfect for schools, restaurants, office buildings, small factories, or just about any place good
quality, distributed sound is needed, the ZM75 and ZM125 offer excellent sound and great value.
In this manual, you’ll find a detailed description of the features of the ZM Series Amplifiers, as well as a
guided tour through the front and rear panels, step-by-step instructions for using the unit, suggested appli-
cations 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 other Samson products in the
future. Also, be sure to check out our website (www.samsontech.com) for complete information about our
full line of Samson audio products.
With proper care and adequate air circulation, your ZM Series amplifer will operate trouble free for many
years. We recommend you record your serial number in the space provided below for future reference.
Serial number: _______________________________
Date of purchase: _____________________________
Should your unit ever require servicing, a Return Authorization number (RA) must be obtained before ship-
ping your unit to Samson. Without this number, the unit will not be accepted. Please call Samson at 1-800-
3SAMSON (1-800-372-6766) for a Return Authorization number prior to shipping your unit. Please retain the
original packing materials and if possible, return the unit in the original carton and packing materials. If you
purchased your Samson product outside the United States, please contact your local distributor for warranty
information and service.
Summary of Contents for ZM125
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