Owner's Manual

OSD Audio Limited Warranty
OSD Audio will repair or replace any defect it in material or workmanship which occurs during normal use of this product
with new or rebuilt parts free of charge in the US for five years from date of original purchase. This warranty does not
cover damages in shipment, failure caused by other products not supplied by OSD Audio or failures due to accident,
misuse, or alteration of the equipment. This warranty is extended only to the original purchaser and a purchase receipt,
invoice or other proof of original date will be required before warranty repairs are provided
Mail in service can be obtained during period by emailing [e-mail]. A return authorization number must be
obtained in advance and be marked on the outside of the shipping carton.
This warranty gives you specific legal rights and may have other rights (which vary from state to state). If a problem
with this product develops during or after the warranty period please contact OSD Audio or your dealer
OSD Audio · 775 Columbia St., Brea CA 92821 · www.osdaudio.com
Power Rating:
The Internal Volume Controls (2) are rated at
100W so the speaker(s) connected to it needs the
transformer setting to be equal to or less than the
rated watts of each MVC. You can have multiple
speakers connected to one MVC but total wattage
must 80% or less than the rated Wattage of the
each of the internal 100 Watt Volume Controls.
Picking the right Distribution Amplifier:
To start with the Amplifier must have a 70Volt output. It must have an output power rating equal to or greater than the
total wattage of the system once you have calculated what each speaker should be set to and the total sum of those
settings. If you had four speakers at 5 watts each (20 total) and one speaker set to 10 watts (20 + 10 = 30) your amplifier
must be rated at least 30 watts minimum. If you had five speakers at 10 watts each (50 total) and another 5 five speakers
at 5 watts each (25 + 50 = 75) you would need a amplifier rated at a minimum 75 watts.
Some companies recommend the total should be closer to 80% of the minimum rating of the amplifier. It is also a good
idea to install an amplifier with more than enough power in case you want to add more speakers later.
Key Point: The Power rating of the amplifier is determined by the transformer settings, not the attenuator Rating, The
rated power of the Attenuator is based upon the minimum setting of the transformer taps which have to be equal to or less
than the rated wattage of the respective MVC Attenuator
STEP ATTENUATION
10
Full Volume
0dB
9 3dB minus 3dB
8 3dB minus 6dB
7 3dB minus 9dB
6 3dB minus 12dB
5 3dB minus 15dB
4 3dB minus 18dB
3 3dB minus 21dB
2 6dB minus 27dB
1 6dB minus 33dB
0 0dB Speaker off
Internal Volume
Control Specs:
10 Step, 33dB
Plus Full Off
Features and Specifications
DECORA style high-quality auto transformer provides advantages of excellent frequency response, low insertion loss
and reliable performance for volume control applications in 25 and 70 volt systems. Attenuation is accomplished in ten
make before break steps plus positive off position (no stop between maximum and off position to prevent switch
damage). The Attenuator features removable input/output terminal blocks, Two in, two out and two optional for
through output for daisy chain option. An attractive alternative to Commercial series attenuators mounts into most
single gang E.O boxes. UL Listed White, Almond and Ivory Plastic Plates with Matching Skirted Knobs in DECORA® Style
New SSVC2V7; 2 Zone, 70V
Mono Speaker Selector