maxdown
Fractal Fanatic
How have you set it up?
Are you using AxeFX the fx loop in the JMP-1 or sending the JMP-1 main outs direct to the AxeFX?
Any issues with gain staging or tone suck?
Any way to utilise an isolated stereo cab IR into a FOH feed? (It's not possible I know without another device added - but what tapped off stereo/2 channel DI Cab emulation device exists to do this that can go between power amp and speaker .... I'd prefer to be able to use third party IRs .... but if it's silly money then I'll just use real Mics)
The reasons and thoughts are below if you want to read more
For some of our small gigs (cramped stages, iffy PAs, strange shaped rooms etc) I'm having too much hassle with FRFR so want to use a conventional tube power amp and guitar cabs. I'm therefore ressurrecting my old Marshall JMP-1 /G Major 2/Mesa fifty/fifty rig ..... and was thinking of going 4CM with the AxeFX. The G Major 2 is a bit disappointing IMO - especially in the loop of the JMP-1.
The thing is the fx loop in the JMP-1 is a little strange - it has a per preset setting range of 0-12 - 0 being off and then varying degees of 'parallel' up until 6 (so at 6 it's sending an equal amount of dry to it's main outs as it's sending to the FX device in the loop) and then from 7 to 12 it's varying degrees of 'serial' (so at 12 it's sending all it's dry signal to the FX unit).
There's some sort of phase inverting going on in the JMP-1 loop and at full serial setting it seems to thin out the sound (I just have a patch cable going from send to return L to test that)
I'd rather just have the loop 'proper' serial - there's apparently a mod (remove 2 resistors - R167 and R169 in the loop circuit) to acheive this and let the AxeFX handle any parallel FX routing set up before feeding back into the JMP-1 loop returns - but I'm not sure if that cures the phase inversion issue.
I want to use the fx loop in the JMP-1 if possible because once set it's unaffected by any adjustment made to the main 'level' knob on the front of the JMP-1. If I were to take the direct outs on the JMP-1 straight to the AxeFx loop returns and then from there to the power amp then if I was to turn up my stage volume using the JMP-1 level knob it would affect the input levels on the AxeFX.
However ..... if I do have to do it that way then I guess the output level on the AxeFX is where I'd need to go to when wanting to send more level to the power amp.
With the AxeFX in there I think I've options to also set up presets to use it direct to the power amp (power amp simulation off) for backup
Options I see are:
1. Guitar > AxeFx in > (add mono front of amp fx stomps) > AxeFX fx send L > JMP-1 In > JMP-1 fx send > AxeFX L Fx return > (add stereo mod/time based FX) >AxeFX Output 1 L/R > Power Amp
2. Guitar > AxeFX Instrument in <front of amp FX stomps followed by FXL block> AxeFX FXL send L > JMP-1 Instrument in > JMP-1 main outs > AxeFX FX returns > AxeFX Output 1 L/R to Power amp/cabs
Are you using AxeFX the fx loop in the JMP-1 or sending the JMP-1 main outs direct to the AxeFX?
Any issues with gain staging or tone suck?
Any way to utilise an isolated stereo cab IR into a FOH feed? (It's not possible I know without another device added - but what tapped off stereo/2 channel DI Cab emulation device exists to do this that can go between power amp and speaker .... I'd prefer to be able to use third party IRs .... but if it's silly money then I'll just use real Mics)
The reasons and thoughts are below if you want to read more
For some of our small gigs (cramped stages, iffy PAs, strange shaped rooms etc) I'm having too much hassle with FRFR so want to use a conventional tube power amp and guitar cabs. I'm therefore ressurrecting my old Marshall JMP-1 /G Major 2/Mesa fifty/fifty rig ..... and was thinking of going 4CM with the AxeFX. The G Major 2 is a bit disappointing IMO - especially in the loop of the JMP-1.
The thing is the fx loop in the JMP-1 is a little strange - it has a per preset setting range of 0-12 - 0 being off and then varying degees of 'parallel' up until 6 (so at 6 it's sending an equal amount of dry to it's main outs as it's sending to the FX device in the loop) and then from 7 to 12 it's varying degrees of 'serial' (so at 12 it's sending all it's dry signal to the FX unit).
There's some sort of phase inverting going on in the JMP-1 loop and at full serial setting it seems to thin out the sound (I just have a patch cable going from send to return L to test that)
I'd rather just have the loop 'proper' serial - there's apparently a mod (remove 2 resistors - R167 and R169 in the loop circuit) to acheive this and let the AxeFX handle any parallel FX routing set up before feeding back into the JMP-1 loop returns - but I'm not sure if that cures the phase inversion issue.
I want to use the fx loop in the JMP-1 if possible because once set it's unaffected by any adjustment made to the main 'level' knob on the front of the JMP-1. If I were to take the direct outs on the JMP-1 straight to the AxeFx loop returns and then from there to the power amp then if I was to turn up my stage volume using the JMP-1 level knob it would affect the input levels on the AxeFX.
However ..... if I do have to do it that way then I guess the output level on the AxeFX is where I'd need to go to when wanting to send more level to the power amp.
With the AxeFX in there I think I've options to also set up presets to use it direct to the power amp (power amp simulation off) for backup
Options I see are:
1. Guitar > AxeFx in > (add mono front of amp fx stomps) > AxeFX fx send L > JMP-1 In > JMP-1 fx send > AxeFX L Fx return > (add stereo mod/time based FX) >AxeFX Output 1 L/R > Power Amp
2. Guitar > AxeFX Instrument in <front of amp FX stomps followed by FXL block> AxeFX FXL send L > JMP-1 Instrument in > JMP-1 main outs > AxeFX FX returns > AxeFX Output 1 L/R to Power amp/cabs