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Fender Studio Bass input impedance
- Thread starter Criss
- Start date
input impedance? Like what kind of a load is it going to put on your pickups?
Output impedance - to the speaker - is 8ohms.
Output impedance - to the speaker - is 8ohms.
The input impedance is dependant on the device being plugged in. There are 3 levels.
Low, High, and Ulta High
Low will be in the range of 600 ohms. Low impedance devices are like some mics or DI boxes.
High is what you are probably asking about. This is where you find guitars and basses. Active pups will be seen in the range of 44K ohms, 220K ohms, 60K ohms. Passives will be around 800K to 100K.
Ultra High is where you find piezo transducers and other vibration sensing pups. They will be 1M ohm and up.
I have a fondness for Ultra High
Low, High, and Ulta High
Low will be in the range of 600 ohms. Low impedance devices are like some mics or DI boxes.
High is what you are probably asking about. This is where you find guitars and basses. Active pups will be seen in the range of 44K ohms, 220K ohms, 60K ohms. Passives will be around 800K to 100K.
Ultra High is where you find piezo transducers and other vibration sensing pups. They will be 1M ohm and up.
I have a fondness for Ultra High
Passinwind
I know nothing.
- Dec 3, 2003
- 23,079
- 46,038
- Disclosures
- Designer/Toaster Tech @ Passinwind Electronics
Passinwind
I know nothing.
- Dec 3, 2003
- 23,079
- 46,038
- Disclosures
- Designer/Toaster Tech @ Passinwind Electronics
The #2 input of many Fender tube amps is around 135K. My Studio Bass schematics don't show that switching scheme for the second input jack though.
thanks for the replies! I want to play my double bass on my amplifier. Indeed, a piezo/transducer pickup has a very high input impedance.
I read that if the amp isn't able to cope with high inputs, you will get thin sounds, losing the mids and especially the deep tones.
I read the K&K Bass Max could be used without the preamp, but wasn't sure if this amp was up to that.
I read that if the amp isn't able to cope with high inputs, you will get thin sounds, losing the mids and especially the deep tones.
I read the K&K Bass Max could be used without the preamp, but wasn't sure if this amp was up to that.
I've had pretty good luck using a K & K piezo directly into a tube amp (typically a Vox AC50 or Fender Bassman) with a short cable and no intermediate preamp or transformer for gigs. It's certainly worth a try if you already have this gear.
I just recorded an album's worth of material this past weekend with the AC50; due to the room configuration we had to use a 20' cable, but the sound is very cool. I also recorded the bass with a Beyer M260 ribbon mic (an old one, not the current model which has an 80 hz high pass built in) and will be blending them.
If this was going to be your main or only application for the rig, it might be interesting to bypass or downsize the input resistors on one of the inputs (or one of the pairs of inputs if they have common input resistors like some 4 input amps).
I have a Bass Max. It works okay plugged directly into an amp, but it can be a little boomy. The Bass Max sounds better when used with my HPF preamp, so I do recommend using a preamp. I use to own a Studio Bass so, I'm familiar with its sound and controls. Between the bass control and the 5 band graphic EQ, you should be able to get a usable sound.
