Various Room Measurements
Speaker placement is everything right? I’ve been following Bob Robbins’ The Art of Rational Speaker Placement Setup and while my system sounds good, damn good, I don’t ‘think’ I’m there yet? And that might be the pitfall in Bob’s method, just how do you know when you’ve made it; aside from hiring Bob to do it himself.
I’ve decided not to tweak for a while. Yes, I’ll start the art over again, but this time I decided to take Room EQ Wizard measurements just to see what’s going on. I’ve been inspired by John Darko and wanted to see how my RT time measures too.
Before beginning, I binge watched Jesco’s (Acoustics Insider) and Jonathan’s (Music City Acoustics) videos, linked here:
How to Use Room EQ Wizard Pt.2
Treating A Studio Start-To-Finish #1: Desk And Speaker Placement (with MusicCityAcoustics)
Treating A Studio Start-To-Finish #4: Do MEMBRANE (RESONANCE) TRAPS work? (with AcousticsInsider)
To start, I populated room dimensions into amroc and REW, both gave consistent outputs; however, my room is more complicated than the rectangle I’ve described, especially on the right side.
Main speaker response is not terrible, but not +/- 3 dB. HF roll of at 10 kHz.
I need to measure the Tannoys now.
The JL Audio E112s add gain, that makes me a bass head. It sounds really damn good.
There is a (left main + left sub) null at 51 Hz, and a null at 67 Hz
The left and right subs (JL E112) have a 60 degree phase difference in their non-inverted, 0 deg position.
+ left and right main phase. Both mains track very closely with some variation at 55 Hz.
Inverting both subs 180 deg
As left configuration, left tune (sub invert switch + 180 deg dial rotation), not too bad.
As left configuration, right tune (sub invert switch + 230 deg dial rotation). The right side has more non linearity.
As left
As left
The left main + left sub null at 51 Hz filled in.
Pass: RT time >0.3 & <0.6 with no major step changes between octaves.
The right wall is a only a half wall.
MiniDSP Umik-1. Six feet from speakers, at ear height, centered
