The V4 is here!
The new V4 LDR attenuator & preamp controller system has started shipping. Check out the latest evolution in our LDR preamp technology.
The ePot.V4 system
Is an integrated preamp controller & LDR attenuator for any passive or active preamp project or product
With a high contrast menu-driven OLED display
That is fully remote controlled

Key features
And uses LDRs to control volume
How do LDRs work?
“A photoresistor (also known as a light-dependent resistor, LDR, or photo-conductive cell) is a passive component that decreases in resistance as a result of increasing luminosity (light) on its sensitive surface, in other words, it exhibits photoconductivity.” – Wikipedia
About our LDR modules
Ok, but why LDRs?
“Because when I listen to music through an LDR preamp I enjoy it more than with any other type of preamp or attenuation. Turns out our customers agree with me. ” – Morten Sissener (founder)
The V4 is inherently a passive preamp

A passive preamp

is a pure volume controller

where the audio signal is not touched by a power supply
When are passive preamps better?
If your audio source has a robust output stage capable of delivering the required energy (voltage & current), then a passive preamp will most likely yield excellent results that will rival most active preamps regardless of price point,
When are active preamps better?
If your source has a weak output stage, an active preamp will likely mitigate this weakness to some extent resulting in better sonics than a passive preamp.
How do you know which is better?
Try a passive preamp.
Try an active preamp.
Then you’ll know.
Because there’s no other practical way to know how well your source performs