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Hd500 Amp Pre Vs. Full Models

Best Answer phil_m , 15 October 2013 - 09:16 AM

So I think what you're experiencing might have something to do with how the POD handles a single input with a dual tone. If you just using Tone A set to Variax, Tone B is essentially being muted if you have it set to Guitar. So that signal comes and when it hits the split, it essentially gets halved with one side going to the amp model in Path A and the other in Path B. So the signal going to the Pre model is attenuated versus what you're sending to the DT25 when you switch the amp in Tone A off. Try setting Input 2 to "Same" and see if the sounds are any closer. It should give you a hotter signal going into the Pre model. It will increase the signal going into Path B as well now that I think of it, but there may be no way around it.


Essentially, even though the preamp models in the HD500 and DT25 are the same, the signal paths going to and from them can be made to be different. I think you may have stumbled onto one of those times where this becomes apparent.

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#21 innovine



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Posted 24 January 2014 - 08:32 AM

It's amazing that the thing is out several years yet its signal chain is still not fully understood.
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#22 chrishlp


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Posted 24 January 2014 - 08:51 AM

To pick the right model (pure/full) you need to think about how the digital amp model will work with the real valve power amp in the DT25. At low volumes the pre combined with the DT power stage lacks the power amp distortion and compression. This is not a problem on clean tones but is not going to work for crunch and distorted tones, you are better off using the full amp models in these cases.

As you increase the master volume on the DT you reach a point where the valve power section is working hard and producing the distortion you need. At this point you are better off using the pure amp model.

At volumes in between low and high, you can use the full amp model but reduce the HD amp master volume to reduce the modelled power amp distortion.

What this does mean is that if you are using your POD HD / DT for both gigging then you will probably need two sets of patches. the only way around this is to ditch the DT and go for a Stage line or the new amplifier.
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