ToTo Man
the band not the dog
Well, if nothing else my treatment repositioning has demonstrated the limitations of the frequency response graph's ability to describe a speaker's in-room tonal balance!...
If you look at the above FR graph in post #100 comparing untreated and treated side wall first reflections, you see very little change, and the small change in the MF is comparable to the small change in HF. However, the reality is a much larger audible shift in the speakers' tonal balance, you'd literally have to be deaf not to hear it!
In summary, it now sounds like the mids have been turned down and the treble turned up. Transient attack and dynamics are now sharper and faster, - the presentation is now more 'edge of your seat' and less 'sit back and relax'. It's like the headphone equivalent of changing from HD600 to HD800 or DT880.
I noticed a similar 'night and day' effect when I first installed the treatment in 2013 when I was using Tannoy Lancaster MG15 as my main speakers. However it's been many years since I've had speakers positioned in the room such that their first reflections are completely covered by the side wall absorbers. As my speakers have gradually crept nearer the front wall, the side wall absorbers should have been moved with them, but the location of the door dissuaded me from doing so.
The change is not all positive. I've lost a fair amount of the 'envelopment' that I experienced when the walls were untreated, and the speakers are now far more revealing and unforgiving. I may need to EQ the treble down a little because it's a bit edgy now, - an observation I'd never thought I'd make about the Ditton 66! I'll experiment with toe-in too in case that alleviates it.
PS - @darrenyeats, am I right in thinking that you use GIK Scopus membrane bass traps in your listening room? Do you mind if I ask you what your low frequency reverberation times were before and after, and how many traps were required to achieve this reduction?
If you look at the above FR graph in post #100 comparing untreated and treated side wall first reflections, you see very little change, and the small change in the MF is comparable to the small change in HF. However, the reality is a much larger audible shift in the speakers' tonal balance, you'd literally have to be deaf not to hear it!
In summary, it now sounds like the mids have been turned down and the treble turned up. Transient attack and dynamics are now sharper and faster, - the presentation is now more 'edge of your seat' and less 'sit back and relax'. It's like the headphone equivalent of changing from HD600 to HD800 or DT880.
I noticed a similar 'night and day' effect when I first installed the treatment in 2013 when I was using Tannoy Lancaster MG15 as my main speakers. However it's been many years since I've had speakers positioned in the room such that their first reflections are completely covered by the side wall absorbers. As my speakers have gradually crept nearer the front wall, the side wall absorbers should have been moved with them, but the location of the door dissuaded me from doing so.
The change is not all positive. I've lost a fair amount of the 'envelopment' that I experienced when the walls were untreated, and the speakers are now far more revealing and unforgiving. I may need to EQ the treble down a little because it's a bit edgy now, - an observation I'd never thought I'd make about the Ditton 66! I'll experiment with toe-in too in case that alleviates it.
PS - @darrenyeats, am I right in thinking that you use GIK Scopus membrane bass traps in your listening room? Do you mind if I ask you what your low frequency reverberation times were before and after, and how many traps were required to achieve this reduction?