AVS Forum Addicted Member
Join Date: Feb 2009
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Well, my experience with DSP is as follows: without my MiniDSP 2x4 unbalanced, the SQ from my sub sounds awful and harsh with lots of uneven ringing due to large peaks and dips that are not smooth in nature and my room is completely untreated and in the dreaded square shape. I recently tested this by removing the MiniDSP from the signal chain and just connect the AVR to sub LFE input directly and run YPAO, disabling auto PEQ in the AVR after running YPAO. I watched a movie and the last time I was this unhappy with my bass was when I had the Dayton SUB-1200 and before I bought the MiniDSP. My AVR doesn't EQ the sub by the way, so the MiniDSP is solely responsible for that.
Now add in the MiniDSP and set target level automatically and auto calculate cut only filters that create a smooth response that adheres very closely to my desired target line without using too many filters or very high Q filters and the sound quality is suddenly sublime as if I had a different sub entirely.
So, DSP added to my LV12R in the form of simple sub PEQ of just 6 filters max is the difference between loving my sub and hating it. In fact, it makes me wonder if I had kept the SUB-1200 and used the MiniDSP if I would have needed to upgrade to the LV12R.
Now, don't get me wrong... the LV12R after sub PEQ is still clearly superior to the SUB-1200 after sub PEQ, namely in terms of low end impact, general power, and in terms of musicality BUT what prompted me to get the LV12R was actually more related to a lack of sub PEQ at the time because of my room's terrible acoustics. So, DSP was a real lifesaver, especially via REW because of how much control it gives you over the target curve, target level, filters applied, etc.
Now in terms of the DSP in the Yamaha AVR I have with respect to the auto PEQ YPAO does, that is a mixed bag as it mainly corrects the treble frequency response and alters the sound of the speakers in not necessarily good ways. I can either take it or leave it and I've left it off mostly since it doesn't improve much and what is does do isn't always subjectively pleasing. However, I'm sure the higher end versions of YPAO and Audyssey, etc fare better.
I'm intrigued by Audyssey XT32 and the new app, as I feel it will be worlds better than my very basic version of YPAO and I will be able to limit correction at at highest frequencies if desired and/or roll off the top end gradually to eliminate any harshness from my speakers.