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Topic: Help understanding DDT Compression on NV112 |
Don Davis Jr
From:
Georgia, USA
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Posted 28 Feb 2008 7:53 am |
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Could anyone provide a layman's (not necessarily something only an amp tech would comprehend) primer on exactly what this is and what it does?
About all I can gather from a search is that it acts as sort of a limiter (on the overall signal?) to the power amp to prevent clipping at loud volumes. That may or may not be close.
But how does it impact the 112's sound on a day-to-day basis?
If you wanted to increase the "country" characteristics of this amp, should you still use a compressor pedal?
Thanks,
Don |
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Jonathan Cullifer
From:
Gallatin, TN
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Posted 29 Feb 2008 7:03 pm
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Yes, it limits the power amp gain to keep the amp from clipping. I notice it when I play low notes at high volumes, as the attack on the notes seems somewhat muted. It's not as harsh as clipping and you can drive the amp pretty hard without any real issue.
The DDT compressor does not replace an external compressor, as it's not adjustable and is only activated when the amp approaches clipping. If you want further compression, use a pedal. |
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Bill Myers
From:
Camp Hill, Pennsylvania, USA
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Posted 7 Mar 2008 10:44 am
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| One thing you have to remember is that a limiter is just a compressor with the compression ratio set to infinity. That is when a signal gets to a certian db or waveform no more is let through. The compression in the Nashville amps is really a limiter. It senses a squared waveform (cliping) and then cuts the signal back. This squared waveform is what destroys speakers. Use of a compressor in a normal way (in front of the amp) is designed to dynamic of the signal to allow the overall volume to be increased in order to give that compressed effect. So the DDT compression does not give you that effect...it is just there to protect the speaker. |
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