I installed this in an open cockpit biplane. The radios and intercom are now very quiet even though I used the voice activation option.

Great intercom

I bought and installed this unit into a two stroke pusher type LSA. Extremely loud cockpit. After a year and 80 or so hours of use I am very pleased with its performance. I installed the aux input jack and sometimes listen to music while flying. Music comes in crystal clear and auto mutes for radio rx or tx. Wouldn't buy anything else.

The Sport 200 (mono) is a big disappointment compared the Sport 200S (Stereo) that I have satisfactorily used many times. The Intercom volume is very weak in this model - compared to the S200S - per Sigtronics. The Mono version uses the radio headphone output for radio transmissions and sidetone - appropriate volume. But, the intercom audio comes from internal 200S audio output which is very weak. This is not identified in any of the information, leading us to assume the audio quality and volume would be the same as the Stereo model. Strongly considering requesting a trade-in of this Mono model with a Stereo model - but the wiring is not a straight plug-in switch. The two models are significantly different and this should be clearly identified before deciding which to purchase. For an application that was not going use stereo music input, the mono Sport 200 simply seemed like a less expensive option - not expecting it to be such week intercom volume.

I am with Greg W. on the Sport 200 mono. The volume of the audio is totally unacceptable. I called the tech line and they told me two modifications I could do with additional resistors and that would improve the volume. No such luck. After some research I have been told the s model has much better volume control. If I thought Sigtronics would let me trade this one on the s I model would be happy to do so even if it does mean a rewire. Disappointed Don H