Greetings... off of the OT are the speaker leads, one green, one black.....Does it not matter which is + or -, & it's just a matter of being in phase with any other amp I may simultaneously be using?
Thnx folks!!
On My Old Gibson GA40T Amp.....
Moderators: pompeiisneaks, Colossal
Re: On My Old Gibson GA40T Amp.....
No problem on this amp as there is no global feedback.
Tube junkie that aspires to become a tri-state bidirectional buss driver.
Re: On My Old Gibson GA40T Amp.....
On my GA-20 RVT the green is +. As well as a Kalamazoo Mod. 2
Being in phase with another amp you connect along side depends on the number of preamp stages of each amp.
On a wet/dry rig I use a recycled s/s slave amp that I use for my wet amp. My dry amp is tube.
When I connected both amps in parallel the speakers were out of phase so I installed a polarity switch on the s/s speaker to be able to invert the polarity.
The reason I installed a switch rather than just switching the speaker wires is because I had a switch on hand (quicker to test).
After trying a few different configurations, presently I tap off the dry amp speaker with a 40 dB pad into the wet effects and wet amp. Polarity reversal not needed here, but it’s available at the flip of a switch.
You can typically tell when you are in phase where you get the most bass response(I play recorded music when I am testing)
Good luck,
Denny
Being in phase with another amp you connect along side depends on the number of preamp stages of each amp.
On a wet/dry rig I use a recycled s/s slave amp that I use for my wet amp. My dry amp is tube.
When I connected both amps in parallel the speakers were out of phase so I installed a polarity switch on the s/s speaker to be able to invert the polarity.
The reason I installed a switch rather than just switching the speaker wires is because I had a switch on hand (quicker to test).
After trying a few different configurations, presently I tap off the dry amp speaker with a 40 dB pad into the wet effects and wet amp. Polarity reversal not needed here, but it’s available at the flip of a switch.
You can typically tell when you are in phase where you get the most bass response(I play recorded music when I am testing)
Good luck,
Denny