Little ISP question:

  • Thread starter Thread starter Sam Laming
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Sam Laming

Sam Laming

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What's the difference between the ProRack and the ProRackG?
 
The difference is in the internal routing of the guitar input signal.

In the ProRack, the two channels are identical to each other and totally independent of one another.

In the ProRackG, the intended use is that your clean, dry guitar signal goes into channel one and your high gain preamp output goes into channel two (for example the FX loop of your amp before any FX.) The input from channel one is split and feeds both channels so that the Low Level Downward Expansion and the Dynamic Low Pass filters on both channels track the dry, unprocessed guitar signal. This way, when you switch from a low gain, clean channel to a high gain dirty channel, the unit can compensate automatically for the gain changes.

I know it may seem a little confusing, but if you go to the ISP website, they have a PDF available for download called DECIMATOR TECHNOLOGY PRIMER. That is where I got my information, so it may be able to help clear up any other questions you may have.

Hope this helps! :thumbsup:
 
Thanks man ;)

I doubt I'd need to use it on clean parts so I wouldn't need to worry about it so I'll stick with the Prorack I think then :thumbsup: once I buy one that is...
 
Well, I can understand your line of reasoning, but I must share with you that the Pro Rack was designed for uses where there is no gain changes. To get the best use of this unit on a clean channel, you should completely remove it from your signal chain. The Pro RackG will compensate for the gain change automatically so that you can "set it and forget it". Anyway, that's the designed, intended use. What you do with it is totally up to you! If it works for you, then great! I just thought I'd share that bit of info.
 
chalnger86":552d3 said:
Well, I can understand your line of reasoning, but I must share with you that the Pro Rack was designed for uses where there is no gain changes. To get the best use of this unit on a clean channel, you should completely remove it from your signal chain. The Pro RackG will compensate for the gain change automatically so that you can "set it and forget it". Anyway, that's the designed, intended use. What you do with it is totally up to you! If it works for you, then great! I just thought I'd share that bit of info.
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That's what I meant, on clean parts I'd have it bypassed, though I've got 2 distortion channels on my Herbert obviously each ones different, considering that's all I'll use it on - my 2 distortion channels, what do you think I'd be better getting in your experience?

Thanks very much for your help :)
 
I suppose if you're using this on a guitar rig, then you'll only need one channel; unless you have a stereo rig. The cheaper route is to get the pedal and insert it in your FX loop before any other FX pedals/processors in the loop and set the threshold accordingly for your highest gain channel. Then you can remove it from the chain by stomping on the pedal when you go clean. I suggested this route because it would be the cheapest route. The ProRack would work as well and provide you with a back up channel, but you would need an FX switching system to remove it from your signal chain for your clean sound. Though, it may not affect your clean sound, left in the chain. That's something you'll have to see for yourself. Hope this helped!
 
Hmmmm and yes that helped lots indeed! The main reason for wanting it in rack form is that all my presets will be on my Diezel Columbus, so this way, if I'm switching from distortion to say a clean and chorus preset, I won't have to jump on the Columbus and another box at the same time - it could all be programmed in.

Thanks very much for your help! :)
 
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