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OWI Inc. * 17141 Kingsview Ave., Carson, CA 90746 * 310-515-1900 * www.owi-inc.com 

 

                      

OWI AMP-STCOMB 

 

           

 

 
 

Features

 

 

Converts unbalanced stereo audio to unbalanced mono audio  

 

Input: 3.5 mm female stereo mini plug  

 

Output: dockable connector  

 

Resistor network provides passive audio summing  

 

Compact design for easy installation into small spaces or behind equipment in a rack  

 

5” long pigtail  

DESCRIPTION

  

The AMP-STCOMB is a small and passive device to be used where space is limited.  The AMP-
STCOMB is ideal for summing stereo signals for use in mono PA systems.  The AMP-STCOMB is 
a single-cable solution meant for combining two-channel stereo audio into a mono audio signal. 
OWI uses a 3.5 mm female stereo mini plug for its connection.  The 3.5 mini connector is for 
unbalanced stereo input signals and an unbalanced mono audio output. 

SPECIFICATIONS

  

Audio 
 Frequency response  

20 Hz to 20 kHz, ±0.001 dB 

THD + Noise 

0.001% @ 20 Hz to 20 kHz at nominal level 

  S/N   

130 dB at maximum output 

Audio input 

(1) 3.5 mm female stereo unbalanced mini plug 

Connector 

(1) 3.5 mm female stereo mini plug (tip-ring-sleeve) 

Impedance   

 1k ohms unbalanced  

Maximum level   

+24 dBu (12.3 V) 

Nominal level   

-10 dBV (316 mVrms) 

Audio output 

1 mono, unbalanced - 1k ohms 

Connectors   

(1) 3.5 mm direct insertion captive screw connector, 3 pole 

Maximum level   

+24 dBu (12.3 V) 

Nominal level   

-10 dBV (316 mV) 
Storage: - 40 to +158 °F (-40 to +70 °C) / 10% to 90%, non-condensing 

Temperature/humidity   

Operating: + 32 to +122 °F (0 to +50 °C) / 10% to 90%, non-condensing 

Product weight   

 0.03 ounces  

dimensions   

5/8 WIDE BY 6” LONG (WIRE INCLUDED) 

Enclosure 

G4 rated PCB with 3.5 female mini attached 

MTBF 

50,000 hours 

Warranty   

5 years parts and labor 

 

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