Manual
AUDIO
OSD
Amplifier and Receiver Consideration
The omni speakers should be powered by an amplifier or receiver that provides 
a minimum of 10 watts per channel.
Optional Accessories -
Outdoor Volume Control (HD-OVC300) 
Tools needed for installation
- Spade or trench tool
- Direct burial rated speaker cable
16AWG.............................................................................................................100 ft
14AWG..................................................................................................100 - 150 ft
12AWG..................................................................................................150 - 200 ft
Specifications
Design:
Tweeter:
Woofer:
Frequency Response:
Power Handling:
Finishes:
Impedance:
70V tap (optional):
Sensitivity:
Dimensions: (H x D)
Gross Shipping Weight:
Unit of Measure:
Warranty
1.5” mylar whizzer cone
8“ with a 360 horizontal dispersion pattern
38 Hz - 20 kHz
300W
Green
8 Ohm or optional 70V switch
2.5W, 5W, 10W, 15W & 20W 
90.5 dB 1W/1m
H 18” x D 13.3” 
20 lbs 
1 Piece
2 years
The Technical Support Center at OSD Audio is available between the hours of 
8:30 AM - 5:30 PM PST, Monday through Friday, excluding holidays.
Warranty & Repair
All OSD Audio speaker products have (2) year Limited Warranty against defects in materials and 
workmanship. Proof of purchase must accompany all claims. During the warranty period OSD 
will replace any defective part and correct any defect in workmanship without charge for either 
parts or labor.
OSD Audio may replace returned speakers with a product of equal value and performance. In such 
cases, some modifications to the mounting may be necessary and are not OSD’s responsibility.
For this warranty to apply, the unit must be installed and used according to its written instructions. 
If necessary, repairs must be performed by OSD. The unit must be returned to OSD at the owner's 
expense  and  with  prior  written  permission.  Accidental  damage  and  shipping  damage  are  not 
considered defects,  nor is  damaged resulting  from abuse  or from  servicing performed  by an 
agency or person not specifically authorized in writing by OSD.
OSD  Audio  sells  products  only  through  authorized  dealers  and  distributors  to  ensure  that 
customers obtain proper support and service. Any OSD product purchased from an unauthorized 
dealer or other source, including retailers, mail over dealers and online sellers will not be honored 
or serviced under existing OSD warranty policy. Any sale of product by an unauthorized source or 
other manner not authorized by OSD shall void the warranty on the applicable product.
Damage to or destruction of components due to application of excessive power voids the warranty on 
those parts. In these cases, repairs will be made on the basis of the retail value of the parts and labor. To 
return for repairs, you must email customer service at RMA@osdaudio.com for a Returned Merchandise 
Authorization (RMA) number# then the unit must be shipped to OSD at the owner's expense, along with 
a note explaining the nature of service required. Be sure to pack the speaker(s) in a corrugated container 
with at least 3 inches of resilient material to protect the unit from damage in transit.
This Warranty Does Not Cover:
Damage caused by abuse, accident, misuse, negligence, or improper operation (installation) • Any 
products that have been altered or modified • Any product whose identifying number of decal, 
serial #, etc. has been altered, defaced or removed • Normal wear and maintenance.
Step 1
Evaluate the location of the speakers. 
Project the length of speaker wire you 
will run.
Note: when purchasing additional direct 
burial speaker wire, make sure the wire 
gauge is consistent.
Omni speakers reproduce sound in a full 
360 degree and a few speakers will cover 
a large area with sound if properly placed 
Step 2
Once you have decided on the locations 
for your in ground speakers, dig a trench 
about 5” leading from the speakers to the 
input source for the speaker cables.
For the OS850 omni speaker, dig a trench 
hole approximately 16” in diameter and 
10” deep for the speaker enclosure.
Step 3
Place the omni speaker in the hole you 
have dugged. Run the direct burial wire 
through the trench to the location of the 
amplifier or receiver.
Please note: When connecting the 
additional wire be sure to use water tight 
wire connectors.
Step 4
Connect the wires from the omni 
speakers to the amplifier or receiver. 
Please make sure the polarity on the 
cables and the speakers are in sync.
Optional: Using an outdoor volume 
control makes it convienet for you to 
adjust the volume outside.
Step 6
Turn on your amplifier or receiver to test 
the speakers. If the speakers sound fine, 
refill the wire trench and cover the 
submerged part of the speaker.
All weather high fidelity in ground 360 sound 
speaker made with reinforced raisin fiber 
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8
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OSD
AUDIO
OSD
®
Receiver/Amp
OS 850 High Fidelity 360 Omni Speaker
Installation Manual
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Step 5
Optional 70V Tap setup (Default setting 8 
ohm for regular home usage)
The 70V transformer offers you the ability 
to daisy chain multiple number of 
speakers in series. In doing so, you simply 
connect 1 speaker to subsequential 
speaker/s. In doing so, adjust the wattage 
setting for ideal volume level.
8
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 OSD AUDIO • 775 Columbia St • Brea • CA • 92821 • www.osdaudio.com • Tel (888) 779 - 4968 • Fax (714) 256 - 8300

