codan
New Member
Hi Everybody,
This is going to be a bit long winded-sorry!
I have been reading up on Impedance, for Amplifiers in particular, it
appears there is Low Impedance or High Impedance inputs & outputs.
My question is, at what Impedance range in Ohms is a circuits input or output classified as either Low or High Impedance?.
Next Question.
I found an old Peavey Chorus Classic 130 Amp at our local recycling centre that i purchased for $5 --condition unknown.
It had the mains plug cut off it so i thought it may not work & be good for studying & to scavenge some components out of it.
I found no burnt components or anything that appeared to be shorting out with a DMM so i connected another mains plug & it works nicely.
On the rear panel it has:
240v-60Hz-400Watts
65W RMS
23v RMS
8 Ohm minimum load each channel.
It has two large speakers in it.
I want to make a preamp circuit for my electric guitar so i can amplify the guitar pickup signal & plug this into the main amplifier & study soft clipping.
My question with this is:
What is the maximum output (Volts, Amps or Watts) i can have from the preamp circuit to plug into the main amplifier?
The guitar is a very cheap model & the pickup output signal can be amplified a lot but i am unsure how far i can take this to safely plug it into the amplifier, i would like to take it as far as reasonably possible, for studying & to make more noise --of course & then try some sound effect circuits?
Next question:
The normal connection setup for a foot pedal is to plug a lead into the guitar & the other end into the foot pedal & then another lead from the foot pedal to the Amplfier.
I have noticed that some people plug guitar into the amp & then out of the amp to the foot pedal & then back to the amp, using the main amplifier as a preamp into the footpedal--Feedback Loop??. Apparently this gives a feedback sound effect as well or something?
I would like to try this & i want to make sure this is ok & how to wire this with the leads properly into & out of my amp.
The Amplifier has two inputs on the front panel:
Low Gain & Gain
On the rear panel it has four mono sockets marked:
PWR AMP IN ------ PRE AMP OUT
---1 V(0dbV)
-----1 ---------- 1
PWR AMP IN ----- PRE AMP OUT
---1 V(0dbV)
-----2 ---------- 2
Any help , hints or advice would be appreciated.
Thank You
This is going to be a bit long winded-sorry!
I have been reading up on Impedance, for Amplifiers in particular, it
appears there is Low Impedance or High Impedance inputs & outputs.
My question is, at what Impedance range in Ohms is a circuits input or output classified as either Low or High Impedance?.
Next Question.
I found an old Peavey Chorus Classic 130 Amp at our local recycling centre that i purchased for $5 --condition unknown.
It had the mains plug cut off it so i thought it may not work & be good for studying & to scavenge some components out of it.
I found no burnt components or anything that appeared to be shorting out with a DMM so i connected another mains plug & it works nicely.
On the rear panel it has:
240v-60Hz-400Watts
65W RMS
23v RMS
8 Ohm minimum load each channel.
It has two large speakers in it.
I want to make a preamp circuit for my electric guitar so i can amplify the guitar pickup signal & plug this into the main amplifier & study soft clipping.
My question with this is:
What is the maximum output (Volts, Amps or Watts) i can have from the preamp circuit to plug into the main amplifier?
The guitar is a very cheap model & the pickup output signal can be amplified a lot but i am unsure how far i can take this to safely plug it into the amplifier, i would like to take it as far as reasonably possible, for studying & to make more noise --of course & then try some sound effect circuits?
Next question:
The normal connection setup for a foot pedal is to plug a lead into the guitar & the other end into the foot pedal & then another lead from the foot pedal to the Amplfier.
I have noticed that some people plug guitar into the amp & then out of the amp to the foot pedal & then back to the amp, using the main amplifier as a preamp into the footpedal--Feedback Loop??. Apparently this gives a feedback sound effect as well or something?
I would like to try this & i want to make sure this is ok & how to wire this with the leads properly into & out of my amp.
The Amplifier has two inputs on the front panel:
Low Gain & Gain
On the rear panel it has four mono sockets marked:
PWR AMP IN ------ PRE AMP OUT
---1 V(0dbV)
-----1 ---------- 1
PWR AMP IN ----- PRE AMP OUT
---1 V(0dbV)
-----2 ---------- 2
Any help , hints or advice would be appreciated.
Thank You
Last edited: