[QUOTE = "Igor Kirkwood, post: 358178, member: 12826"] Obtaining good results for speaker measurements in an anechoic room or with a Klippel system is satisfactory for the manufacturer and for the customer.
But to optimize his system, the auditor needs real measures in his
room.
Some software such as Dirac or hardware have been discussed here.
I would like to present another solution used in my system.
As a sound engineer for classical music, I generally work with a minimum recording configuration:
2 Neumann TLM50 microphones, no compression, no DSP,…
So my listening configuration is used to check my recordings:
A 130 cubic meter room, the walls are treated with almost 5 cubic meters of glass wool
The listening distance is 3.1 m, the distance between the front speakers is 2.9 m The stereo front channels are Yamaha NS1000X in an active 3-way configuration, the original tweeter has been replaced by a 27 mm Focal Be, foam on the front wall to minimize diffraction
-2 surround with passive Yamaha NS1000X
-4 SVS PC-2000 subwoofers in the middle of the walls
-QSC Q-Sys 110F performs FIR filtering for subwoofers (FIR filter at 90Hz, 70dB / oct), crossovers for NS1000X (375 and 1800Hz, 70dB / oct), EQ FIR and IIR correction, delays, .. .
This processor also takes care of the choice of source, stereo / multichannel, phantom center, LFE and bass management,…
The management of the subwoofer is also special: you can choose between mono, stereo, M / S, Griesinger (improved LR),… and possibility of modifying L + R
(in phase) and LR (out of phase) bass levels
For listening tests, all configurations can be switched and compared instantly without "clicks" on a computer with a user-friendly interface
The configuration of the system was carried out by Jean-Luc Ohl (who introduced MMM on
www.ohl.to )
About the correction (that's the subject): it is based on MMM for the amplitude (therefore min phase only) and several averaged scans for the excess phase;
DRC-FIR, thanks to Denis Sbragion software, and loaded into Q-Sys with 8192 FIR taps plus IIR
(all programming and measurement analyzes are carried out remotely).
Now let's share some measures:
1 / no equalization on the NS1000X before, just crossings and delays
2 / NS1000X front with equalizer
3 / NS1000X front with 4 subwoofers:
This configuration is optimized for
improve LR (stereo signals on low frequencies, see Griesinger) [/ QUOTE]
This seems to be done by the book, which is to be expected from the professional insider. I also very much like the idea of checking your recordings on the home system like this.