Supro Huntington II Piezo circuit

[CereBassum]

Yes, piezos can be problematic. It’s something about the elements in the saddles seated and working properly.

I think you are correct.

 

[Mugre]

Is that why I can set my acoustic bass at the lowest possible setting and it's as potent as my G&L L2000 at halfway or more?

I'm getting in over my pay grade. My tech chops are incidental from working as a customer service rep in a repair shop for a couple of decades and not from study/practical application. It may or may not be why the acoustic seems to be so "hot." The two real issues with an unbuffered piezo is that the gain structure, that is the matching of the two loads is screwed up. Some input structures handle it better than others. The other issue is that the mismatch creates a filter that eats low mids. That's one of the reasons why unbuffered (passive) piezo pickups sound buzzy and thin. You want a pre-amp with a really high, input impedance. A mega ohm or more.

As to your problem with levels. If the acoustic has a battery, it's possible/probable that it's putting out something close to line level. If it's going into a combo with an input that was designed for high impedance (not as high as piezo), really low level magnetic pickups, it would explain why the acoustic is coming in hotter than the electric bass.

HTH,

Mugre

 

[jd56hawk]

I'm getting in over my pay grade. My tech chops are incidental from working as a customer service rep in a repair shop for a couple of decades and not from study/practical application. It may or may not be why the acoustic seems to be so "hot." The two real issues with an unbuffered piezo is that the gain structure, that is the matching of the two loads is screwed up. Some input structures handle it better than others. The other issue is that the mismatch creates a filter that eats low mids. That's one of the reasons why unbuffered (passive) piezo pickups sound buzzy and thin. You want a pre-amp with a really high, input impedance. A mega ohm or more.

As to your problem with levels. If the acoustic has a battery, it's possible/probable that it's putting out something close to line level. If it's going into a combo with an input that was designed for high impedance (not as high as piezo), really low level magnetic pickups, it would explain why the acoustic is coming in hotter than the electric bass.

HTH,

Mugre

Good enough. I'm not complaining, of course. Nothing to complain about with the bass. Just curious.

 

[WayneDupuis]

I just bought one of these too and love the thing but it's doing much the same.
The switch to piezo pops and volume control does very little with hot hot piezo.
Just weird.
In magnetic pickup mode tone and volume work fine.
Ever figure this out?

 

[Kevin Doyle]

Can someone tell me what size tool I need for the truss rod on one of these? My Piezo is also insanely bright. I do think mine is the way it’s supposed to be and it sounds pretty good blended with the front pick up. Definitely hear every bit of finger noise with piezo even with flats. Might be good for me to practice getting a light touch..