The volume control inside an electric bass guitar is connected in parallel with the pickup.
A resistor in parallel with an inductor makes a high cut filter, so unless the potentiometer is of the order of Megohms and the input impedance of the amplifier as well, high frequencies may suffer.
On the Yamaha RAX200 the volume pot as well as the treble reducing pot are both 250K and they are in parallel.
So the obvious thing to do was to bypass them and connect the pickup directly to a Pleiades pre preamplifier.
The pickup was directly connected to the secondary of the input transformer of Pleiades V5. The transformer's secondary inductance of 5.1H forms a useful low cut filter as without it bass is tremendous and unnatural. The sound was amazing. Great bass, mid and treble detail and attack. The 2nd EF183 electron tube stage possibly gently compressing while keeping subjectively punch and volume.
It would great to connect the V5 to the mic input of iPad Air 2 to record in GarageBand.
With a K117 JFET Pleiades pre preamp whose input was terminated by 5.1Henrys there was more treble due to the higher input impedance as explained in earlier euroelectron entry.
It would be great to instantaneously limit with electron tubes all this high frequency containing signal and then high cut with a capacitor at the anode to restore waveforms round shape Mike Oldfield way.
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