Voltage vs the 10th. So the bass end of the Voltage is definitely an upgraded version of whata on the 10th anniversary. With both switches in the up position, I mentioned the Voltage reminded me of the 10th anniversary tuning. So both sets represents Penons version of the V tuning but both are mild in comparison to what is the norm in IEM land.
In double switch mode the voltage is the big boss version of the 10th anniversary. Simple and plain. A clue to what the bass end is doing is that they both uses similar biofilm dynamics where the 10th is using smaller 6mm crystalline plated biofilm dynamics and the Voltage using fiber composite biofilm 8mm dynamics with a new flexible hanging edge diaphragm. Not only does the size here make a difference but the physical nature of the bass end is different. 10th using a single Sonon BA for mids and 1 knowles BA for highs and 2 Sonion ESTs. 4 way crossover but uses 3 sound tubes separating the 3 zones for sound. The ESTs and Knowles BA handling the highs through one of the channels.
Voltage once again using 4 sound bores. The 4ESTs this time gets its own sound bore to the ear in comparison. Two BAs handling the mids and two handing the trebles.
The Voltage adds a bit more warmth has greater bass fullness and sub bass impact, has more substantial lower mids emphasis vs the 10th. 10th is more mid bass focused and the Voltage is a bit more sub bass focused. The 10th Mid trebles is actually more emphasized vs the better-balanced Voltage trebles. This shifts the tonal character on the 10th to be just a touch brighter in tonal character vs the Voltage more natural balanced - to a warmer tonal character based on which switch you use. Both have excellent stage but the Voltage has the leg up on note weight, fullness with greater depth of sound in comparison. While both sets sound more dimensional than flat the Voltage here is clearly showing that it is a superior IEM. I never thought the 10th anniversary was a thinner sounding IEM but in comparison to the Voltage its tonal shift is a touch brighter and does sound a bit thinner in note weight.
Where these two share the most similarities is in how they fit. The shell shape is very identical with the Voltage being a bit bulker but their shapes are very much the same. Considering the Voltage uses almost double the drivers with bigger dynamics. That is pretty remarkable what Penon was able to fit inside what is essentially the same shells as the 10th anniversary.
If you took one part 10th, one part impact, one-part Volts= You get something close to what the Voltage represents.