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In the Forum: Playback Listening
In the Thread: The open project: a lateral cross-injection.

Post Subject: The open project: a lateral cross-injection.Posted by Romy the Cat on: 3/27/2013

A few days back I visited an audio person who demonstrated to me his experiments with extreme lateral deviation of souses. Regardless if I agree or not what he was doing or trying to do the demonstration has an unexpected result.

One day I was driving home from work and I asked myself: could the imaging that we get from out stereo to be improved but in different ways? The key for my thinking was my familiarity with Lamm L1-L2 preamps that did some amassing imaging trick the no other preamp could approach. Do not get me wrong, there are much more interesting preamps, my current is one of them but not of the preamps known to me do that imaging trick. I use to write about it in past.

So, if you remember I proposed that Lamm in his L1 ad L2 preamps does some intentional or not intentional cross-injection of phases, mixing some signal from one channel to signal with other. It is not what I know or something that Lamm told me – that is pr my speculation as it has similar effect with sound I heard when cross-phasing was done in headphone amplifiers.

Looking what my lately visited person did and considering some results I got from Lamm electronics I wonder: of t would be interesting to introduce lateral phase cross-injection in Macondo. Macondo is phenomenally easy for such experiments as it has multi-amping and to do it very simple. All that I need to do it take 4-5 itch MF driver, attach it to frame and source it from another channel. I do a pair of small monitors the I can use for that purposes.

For sure such of acoustic cross-channel injection will kill something and here is the key (I think) for the whole application. The cross-channel injection need to be very smart cross-phase injection what the injection needs to be very limited by band and very precisely dialed by amplitude. I think I will start with 300-2000z hand and with minuses 12dB. The time alignment of such injection is also might be the factor but I have no opinion about it as now.

So, I declare the Club’s open projects. I have outlined the idea, feel free to experiment and to post your results. I presume that somewhere in during experiment one of us might (or might not) come across a configuration that might take the whole notion of imaging, instruments positioning, distance to the first reflective boundaries to a very new dimensions.

The Cat

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