#16
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At first I thought.. no way.. has to be a 1MOhm input. I even looked up the manual. You're absolutely correct of course. 47KOhm is the 'High' in. Odd. And I think the consequence is that you need another box to go with it.
If I were you I would get a preamp with the appropriate input impedance and a line out (stereo level) output. Drive the Schertler 100 with the line out from the preamp. You really don't want big impedance mismatches.
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Spook Southern Oregon |
#17
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When using a resistor... canīt the 27db attentuator be compansated by just turning up the volume of this channel? Or what problems do occur?
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Goodall Grand Concert Italian spruce/EIR Taylor GS-mini mahogany In process of construction: 0-12 (own build) |
#18
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if one was to go through a di box and use
the amp out on the box to the hi z input of the jam 100 amp would this effect the input impedance or is that only the XLR out of a Di that alters the impedance..?? |
#19
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Cheers
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i got tired of updating my guitars. |
#20
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Some people say the K&K sounds good plugged into anything but that has not been my experience. |
#21
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Louis |
#22
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Power Transfer
Impedance matching is all about power transfer. When matched maximum power is transferred.
In the extreme the power line coming into your house has a extremely low impedance. If you were to match the same impedance with your toaster it would consume all the power the power company has to offer. One huge flash bulb. Plus the existing power lines would also vaporize. That is the extreme. In reality your toaster has a impedance many orders of magnitude higher than the power line so it just toasts your bread. In general low impedance power source (your guitar) into a high impedance input ( your amp ). is good. the other way around not so good. With all that said try whatever you want if you like the "sound" keep it.
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"My opinion is worth every penny you paid for it." "If you try to play like someone else, Who will play like you". Quote from Johnny Gimble The only musician I have to impress today is the musician I was yesterday. No tubes, No capos, No Problems. |
#23
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Many people really like a Fire Eye with a K&K and I'm sure they are a great complement, but it's probably due to the preamp's voicing and not its input impedance. Many people also like the Tonebone PZ Deluxe and PZ Pre with the K&K and it also has a 10mohm input impedance, but unlike the Baggs, it's designed to be very neutral and clear in its sound. It isn't trying to warm-up a bright sounding pickup. Impedance mismatch refers to running something high-impedance into an input that's low-impedance, not running high-impedance into something marginally more or less high-impedance. Once you get in the high-impedance realm, it's more or less the same.
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Alvarez MC90 Guild GAD-50 w/Seymour Duncan Mag Mic Taylor 352ce Taylor 514ce Zoom AC3 https://linktr.ee/erikjmusic |
#24
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1) Matching Impedance: This involves signal transmission which requires identical impedance values between two units. Early analog telephones did this (600 Ohms). In modern settings, this "matching" is found when connecting digital devices, such as 75 Ohms for wordclock or SPDIF or 110 Ohms for AES3 (aka AES/EBU). Both the source output and the input load must match, i.e., have identical impedance, in order for the circuit to work as designed. 2) Bridging Impedance: This is different and involves feeding a lower impedance source output into much higher input load impedance, usually at a minimum of a 1 to 5 ratio. Most connections in a studio or in sound reinforcement involve bridging impedance. For example, a mic with an output impedance of 300 Ohms should be connected to a preamp with an input impedance of at least 1,500 Ohms. There is no "matching impedance" here. Running a mic at 300 Ohms into a preamp input of 300 Ohms will not work well. All impedance discussions involving passive pickups (such as the K&K mini) connecting to a preamp involve bridging impedance, not matching impedance. To complicate things a bit, passive pickups have a variable output impedance, depending on the specific frequency and to some extent upon amplitude. The K&K mini has variable output impedance in the range of thousands of Ohms to over a 100,000 Ohms. This is a "high impedance" source. Applying bridging impedance discussed above, the input receiving that signal should have an input impedance at least 5 times higher than the highest output impedance of the pickup, which is why the suggestion of 1,000,000 Ohms is used. |
#25
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Excellent post!
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"Lift your head and smile at trouble. You'll find happiness someday." |
#26
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When you compare a PADI vs a Red-Eye, you're getting many other variables, and it's hard to say why you might prefer one over the other. I have never used a PADI, so I have no thoughts on it. I do have a Red-Eye and it sounds quite nice to me, but I suspect it's the clarity, simple clean circuit, and the treble control, which is very effective (tho that's just a guess - who knows why it sounds good). But I have a bunch of other preamps, Venue, Felix, SPS-1, Raven Labs PMB-1, all of which also work great with K&Ks even tho they have different impedances.
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Music: Spotify, Bandcamp Videos: You Tube Channel Books: Hymns for Fingerstyle Guitar (std tuning), Christmas Carols for Fingerstyle Guitar (std tuning), A DADGAD Christmas, Alternate Tunings book Online Course: Alternate Tunings for Fingerstyle Guitar |
#27
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Interesting discussion. My limited experience is that my K&K equipped guitar always sounds better when run through a preamp. For small gigs, I run straight into a Fishman Mini, which sounds good, but when Ive used a better external preamp (T1) it always sounds better. Probably because the external preamp is more capable than the onboard preamp that comes with the mini.
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