**The F-125, F-165 and 175 claim to use a 10 watt 1 to 20,000 hertz audio amplifier. This amplifer only outputs 65 volts peak to peak voltage. Sixty five volts peak to peak is not 10 watts but is about 1.5 watts.
In a You-tube video the the Audio Mode voltages of both instrument are compaired. The Blaster will have a higher Audio Mode voltage than the GB-4000 but they misread the voltage of the GB-4000 at 18 volts. Their equipment could not read the true peak to peak voltage. Another fact they failed to mention is that 99% of the people who use the GB-4000 use it in RF Mode. The peak to peak voltage of the GB-4000 in RF Mode is 110 volts peak to peak which is 45 volts higher than the Blasters 65 volts peak to peak.
Another thing they failed to mention is the Blasters 65 volt amplifier only goes up to 20 thousand hertz. The GB-4000 goes up to 40,000 hertz in Audio Mode at 40 volts.
In RF Mode almost the full frequency range of the GB-4000 goes up to 110 volts. With the SR-4 Amplifier it goes up to almost 10 watts or over 200 volts. The Blaster F-125, F165 and F-170 only have a peak to peak voltage of 26 volts over almost the complete frequency range of their instruments.
The GB-4000 can be adjusted to output 65 volts in Audio Mode upon request when a wavier of all responsibility is signed. We do not recommend this be done since there is a safety issue with using 65 volts in Audio Mode.
