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The client, Chris Venhaus, is owner and operator of VH Audio. He has quite a bit of experience with acoustic measurements and had made an effort to acoustically treat his room. However he wanted to get an expert "second opinion" on his acoustic measurements and what further opportunities for improvement there might be.
Chris Venhaus listening room with measurement mic set up for room acoustic analysis
At the time of the project Chris used Legacy Audio Whisper XD speakers, which use a Xilica DSP unit for crossover, speaker and room correction. He had two Legacy LF Extreme 15" subs, Antique Sound Lab amplifiers, a Bent TAP transformer volume control, Empirical Audio OverDrive Signature USB DAC and a modified Mac Mini source. His room was well acoustically treated with RealTraps RFZ panels, 12 MegaTraps, 6 ASC ¼ rounds, ASC Soundplanks, Furutech RWL1 panels and some generic panels for ceiling 1st reflection points. His room a nice sized dedicated space of 17'x23'.
Chris's listening room was well treated but still had some nagging acoustical issues
Chris was an advanced Room EQ Wizard user and had used the program extensively to position and integrate his subs and create EQ filters to reduce the negative effects of room modes.
We agreed with Chris to work on an hourly basis to analyze his acoustic measurements, determine root causes and propose high level solutions. Essentially a Room Acoustic Analysis without the formal report.
Room acoustic analysis in progress!
The measurements we analyzed were left speaker by itself, right speaker by itself, subs by themselves and left/right/subs together. We also examined the lateral and vertical off axis response of the speakers in order to determine the spectral content of the major reflections in the room. Our main conclusions were:
After the consulting work the acoustic measurements were improved and the sound was better.
Post consulting measurements, 1/3rd octave smoothing
Nyal Mellor, Founder, Acoustic Frontiers