Here is the latest information and our recommendation -
Currently, we request that you DO NOT USE any external speaker of any impedance value with the CS800. We are working on solutions to correct this problem as quickly as possible.
We have been able to recreate the damage to the audio output system while using an external speaker. On careful analysis, Jerry has determined that this problem originates in speakers with a high inductance, and that impedance will play little role. The cause is a voltage spike generated due to high inductance that is reflected back into the system, overpowering the MOSFETs. The spike is generated when a sharp waveform is passed to the speaker, which is possible under both analog and digital reception.
We are researching solutions and have some ideas that need to be tested and approved by the manufacturer. We will publish the changes for those who would like to make the modification
themselves, and we will handle them for those not comfortable doing so. Please do not start shipping radios to us until we get an RMA process in place to handle them.
As always, please contact us with any questions.
Chris Edwards
Connect Systems Inc.
Blog Connect Systems Inc DMR
Connect Systems, They will send you a diode to install which is supposed to fix this.
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