"Pure Direct" Virginity Popping.

Circa 1976, but also used multi-band and parameter EQ to do "by ear" room corrections. However in HT's with sophisticated DSP room correction software and proper sub placement/speaker x-over pure direct is far less applicable/accurate.

Except that EQ absolutely CANNOT address frequency anomalies caused by the superposition of non-minimum phase interaction of direct and indirect energy signals.

Thus, EQ can ONLY correctly tailor minimum-phase direct signals.
And as such, it cannot address the broad range that defines the interaction of the speaker and room.

These issues must be dealt with in the time domain - Not the frequency domain.

It was kind of hard to deal with time domain (never had heard of it at the time) with limited funds from my high school job in circa 1976. Please reread my post.

"pure direct" is a 20 dollar handjob in a back alley...

"properly setup and eq'd" is a weekend with scarlett johansson...

you decide...

omg!!!

^^^

right...

It depends what im watching. I have a Yamaha receiever and it uses DSP modes that are supposed to enhance content. When watching football, I always use the Sports mode which keeps the announcers voices on the center channel and game sound plus crowd noise on the L/R and surrounds. I also sometimes use the Spectacle mode when watching action movies. This DSP mode widens the front soundstage and increases the effect of left to right and front to back panning. However, I usually use Pure Direct mode on most Blu Ray content. I put a lot of time and money into my room in order to get close to a flat response. When I run auto calibration software, the center channel is the only speaker that gets boosted to +.5db. Everything else stays at 0.0. I do bump the surround speakers .5db in order to enhance the surround effects a little bit when using the Spectacle mode.

^^^

it has been explained to you (numerous times i might add), why your "theory" of all levels at 0 is, ummm, hogwash....

post graphs of your response curve... iow, put up or shut up....

Pure Direct on my AVR is never used because if I want to listen to 2ch material in straight two channels... then it doesn't go into my AVR in the first place! An old Perreaux 2ch preamp and poweramp does a much better job for stereo listening.

But I actually prefer 2ch material through my AVR with its '7ch stereo' mode that beats the pants off my old 2ch preamp. (both systems using the same front poweramp) 2ch material through my 5.1 system has a glorious soundstage.

I don't have instruments to measure response curve. The only thing I can do is post a video of my AVR running auto calibration and the on-screen results.

I could care less what you think is hogwash. I know that before I added acoustic treatments at the first reflection points and on the rear wall, my levels were all over the place.

My right channel would be bumped up +1.5db and my left channel would get bumped down to -5db. My center channel would get bumped up nearly +4db every time I ran it.

I really don't know why you care so much that auto calibration doesn't do anything to my speakers when it comes to level adjustments. If you think it's better for the calibration software to assign fluctuating levels across all of the channels then thats you. I would rather have all speakers as close to 0 as possible.

I have an IB subwoofer. Direct just routes to the towers no 2.1 so I loose all the sub goodness. My main setup is a dedicated theater optimized for 7.1. 2.1 is better for me than 2.0

In some non-sub tests I didn't find any change between it and "straight". I don't ever use DSP modes outside of of Dolby/DTS modes for some 5.1 -> 7.1 conversions.

I run Yamaha receivers with preouts to amps.

My stereo no-sub setups don't use any DSP.

Have Fun!

I use Straight instead of Pure Direct on my Yamaha so my subs are still used.

The AVR settings of 0 are trim levels (SPL=how loud speakers are set) they have nothing to do with the frequency response of the speakers. Basically means speakers are well matched and symmetrical in relation to listening position.

All I know is that after I measured all speakers from the listening position and then used a laser level and protractor to get the same angle on everything on top of adding acoustic panels to the first reflection points and rear wall, the level adjustments were no longer all over the place. At this point, the only speaker that was getting boosted was my center channel and that was only at +.5db.

never use the EQ in past setups. my current receiver has a "source direct" mode, which all used inputs have turned on. most of the equipment I research/dream about purchasing doesnt even have an EQ option... or I would just ignore it

I never use pure/direct because i lose my sub. Neutral Speakers + PB13 Ultra + Room Treatments + Audyssey Multeq XT = Fun times.