I found that running the SDC on Sensitivity 1 and 4 LED Threshold to be the quietest re EMI and other noise. However, the volume at my ears was not enough for me.
I first tried the B&Z (same detector settings) to improve the volume to a clear target response, the B&Z created a noticable Humm, which quickly became intollerable.
I then used the SP01 in several configurations, all gave outstanding results.
I'll Ignore the SDC supplied headphones as the plug won't allow use of any booster. I have Nenads adaptor cable to give the 1/4" jack socket output. I also have the Deteknix wireless headphones with its Tx module. I also have a seperate Deteknix Tx/Rx module that I can use normal headphones or a speaker.
To use the SP01 with the Deteknix wireless system there are 2 options - 1. 1/4" socket (Nenads Lead) to a small patch lead to the input of the SP01. The output of the SP01 to the Deteknix Tx module. This amplifies the detector before the signal is TX.
The 2nd option can use the Deteknix headphones or, as I did, the Koss GPX5000 headphones; Using the seperate Tx/Rx modules, I connected the Tx directly to Nenads patch lead at the detector. For the Koss phones I plugged the Rx to the input of the SP01 and the Koss to the output, this amplifies the audio after it's Tx.
The Deteknix headphones has a cabled option in case the battery goes flat during the day, it is a 1/8" plug which requires a 1/8" skt to 1/4" plug adaptor (which I have).
I used the same methodology for the B&Z Booster. The last test I did was to replace the Koss phones with the single speaker on my harness.
Conclusions
1. On the SDC2300 the B&Z Booster, speaker or headphones is problamatic and not recommended. (I'm being polite
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2. The Sp01 gives a slightly better response when used after a wireless signal is transmitted.
3. If using the Deteknix wieless system, the seperate Tx/Rx modules using Koss headphones gives a clearer signal than the Deteknix headphones.
4. If using wireless to speaker, the duel speaker option would be significantly better than a single speaker.
In the 2 days I was able to use the SP01, I found 8 bits of gold, some of which I am sure would have been missed without it.