TNTRoy said:
What is a series loop? and how would that been different that what it had stock?
Easier to explain what a parallel loop is first. When you have a parallel loop, you have two signals: the pure, uneffected signal, and another that is passed through the effects in the loop. These two are then mixed together. The idea is that since effects can degrade your tone, you also get pure uneffected amp tone. Nice idea, doesn't work in practice. The slightest latency in your effects loop can cast the two signals out of phase with each other, resulting in a horrible sounding out-of-phase 'quack'. It sounds like you had a broken chorus pedal always on. It really ruins your tone. This happens very easily with digital effects since they always have
some latency (A/D and D/A conversion plus processing), no matter how minimal. That is enough to throw the two signals out of phase with each other.
But it can also happen with analog effects. I have experienced it with nothing but a patch cable in a parallel effects loop!
A serial loop simply passes the entire signal through your loop. This can obviously degrade the signal if the effects in the loop color the signal or do poor A/D-D/A conversion, so you want the best quality effects possible in your loop. No Chinese plastic toys.
So, in theory, it will not cause an out-of-phase effect at all. But I've experienced a slight out-of-phase effect with some serial loops, at extremely low (bedroom) volumes. Apparently this is caused by signal bleed. The problem goes away at band volume.
In general, I much prefer serial loops.
TNTRoy said:
What is the difference between Tube and diode Rectifier? is this something i need to consider?
No. Not in your case.
They will slightly change the amp feel and attack - diode rectification makes the attack faster and sharper, with tube rectification it is looser, slower and more vintage-y. It is a very subtle difference, many people don't even notice it. For what you want to play, diode rectification seems to me preferable anyway.
