OSD Audio MVC-25 Manual

OSD Audio Ikke kategoriseret MVC-25

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Side 1/2

New 70V Attenuators MV 25,

MV 50 & MV 100

DECORA® Style 70V

Volume Controls/Attenuator

Basic Connecons:

1) All speaker connecons are in parallel whether the

speakers are “home run” individually back to the

amplier; or in a Daisy Chain conguraon Opon#1

from one speaker; to the next making sure Opon#2

they are connected in parallel.

Note: the 3 MCV Aenuators feature a convenient

through-output to easily connect the speakers in Daisy

chain conguraon using the thru-put connecon (by

passing the Transformer) of each Volume Control you

use in the chain.

2) The Common and 70Volt outputs of the Amplier

connect to the Common and Input of each Aenuator

whether all are coming directly from the Amplier in

“Home Run” or from the Aenuator to the previous

Aenuator in the “Daisy Chain”

3) The Common and Output of each Aenuator

connects to the Common and desired color coded

waage wire on the Primary of the 70 Volt Transformer.

Or the Common and Output of each aenuator

connects to the negave (black) and Posive (red) for a

speaker with built in transformer. Then the waage is

set with the selector switch (as featured in the images

to the le)

4) The 8 ohm secondary (output) wires on the

transformer connect to the speaker terminals

(Black-/Red+).

5) Then connect the Line or Auxiliary output from your

main mixer to the Auxiliary input on the Distribuon

amplier.

Transformer

Oponal

Through

Output to

Aenuator

Input

from Amplier

Output

to Speakers

Features and Specicaons

DECORA style high-quality auto transformer provides advantages of excellent frequency response, low inseron loss

and reliable performance for volume control applicaons in 25 and 70 volt systems. Aenuaon is accomplished in ten

make before break steps plus posive o posion (no stop between maximum and o posion to prevent switch

damage). The Aenuator features removable input/output terminal blocks, Two in, two out and two oponal for

through output for daisy chain opon. An aracve alternave to Commercial series aenuators mounts into most

single gang E.O boxes. UL Listed White, Almond and Ivory Plasc Plates with Matching Skirted Knobs in DECORA® Style

Power Rangs: MV 25: 25W,

MV : MV50 50W & 100: 100W

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 ve 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 alteraon 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 . A return authorizaon number must be RMA@osdaudio.com

obtained in advance and be marked on the outside of the shipping carton.

This warranty gives you specic legal rights and may have other rights (which vary from state to state). If a problem

with this product develops during or aer the warranty period please contact OSD Audio or your dealer

OSD Audio · 775 Columbia St., Brea CA 92821 · www.osdaudio.com

DECORA® Style 70V

Volume Controls/ Aenuator

Power Rang:

The MVC are rated at 25W, 50W and 100W so the

speaker connected to it needs the transformer

seng to be equal to or less than the rated was

of each MVC. You can have mulple speakers

connected to one MVC but total waage must be

equal to or less than the rated Wattage of the

respecve MVC that you are using.

Transformer Taps:

For a 70V speaker, whether a in- require more than Rated was to produce ceiling or wall mounted speaker you shouldn’t

more than enough sound. Normally to get the volume right you would need to experiment with the separate waage

sengs (10w, 5w, 2.5w, 1.25w) at each locaon to get the volume you desire. It is more exible to add an aenuator

(volume control) for each speaker. If you add an aenuator you would turn it to full volume then select the transformer

tap (25 wa for MVC-25, 50 watts for the MVC50 and 100 was for the MVC100) which gives you the most volume you

could want.

Picking the right Distribuon Amplier:

To start with the Amplier must have a 70Volt output. It must have an output power rang equal to or greater than the

total waage of the system once you have calculated what each speaker should be set to and the total sum of those

sengs. If you had four speakers at 5 was each (20 total) and one speaker set to 10 was (20 + 10 = 30) your amplier

must be rated at least 30 was minimum. If you had ve speakers at 10 was each (50 total) and another 5 ve speakers

at 5 was each (25 + 50 = 75) you would need a amplier rated at a minimum 75 was.

Some companies recommend the total should be closer to 90% of the minimum rang of the amplier. It is also a good

idea to install an amplier with more than enough power in case you want to add more speakers later.

Key Point: The Power rang of the amplier is determined by the transformer sengs, not the aenuator Rang, The

rated power of the Aenuator is based upon the minimum seng of the transformer taps which have to be equal to or less

than the rated waage of the respecve MVC Aenuator

Each Kit includes color matched White, Almond and

Ivory outer plate, DECORA® insert and rotary knob

STEP ATTENUATION

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 o

10 Step, 33dB

Plus Full O

New MV 25 70V,

MV 50 70V &

MV 100 70V

Produkt Specifikationer

Mærke:	OSD Audio
Kategori:	Ikke kategoriseret
Model:	MVC-25

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