How do my measurements look, please?

[Joffieb]

Hi All,

I am relatively new to the whole Room EQ/Correction thing and read the REW instruction manual and watched countless videos on YouTube and it eventually clicked.

My workflow has been as follows:

1. Set up my mains (B&W 685 s2) using L.O.T.S. from New Record Day.

(Tried Sumiko Master Set but couldn't get it right);
2. Placed sub in various places in the room on neutral settings ran REW Full Range measurements;
3. Luckily found an WAF spot for the sub that measured as well as the WAF objectional places;
4. Set sub adjustments (in this order: gain, crossover, notch (AE Aegis Neo sub has this feature) and finally phase) by comparative REW measurements until I could get the curve as flat as possible;
5. Moved around one kist in the room that helped an extra bit with one notch;
6. Created filters;
7, Uploaded to Minidsp nanoDigi 2x8 which is between my streamer (Audioengine B-Fi) and DAC (Modi 3);

I can't measure my corrected system because REW plugs into my pre-amp from my laptop and there is a delay when I try to use Bluetooth from the laptop to my streamer for measurements so I am not sure if it is even accurate at all.

My streamer has an analogue out which I have connected to my Pre-Amp so I can A/B test and the difference is vast. The corrected version takes away what seems to be a background deep noise and the instruments and vocals remain and are more accurately located but seem a bit thinner. It's a different world. The volume levels are different and the uncorrected signal is a bit louder and that may account for the better signal sounding thinner. I just cant believe the difference! NOT snake oil and the biggest tweak ever. It will take getting used to because that uncorrected signal has that boom/warmth that appeals to the Id whereas we're aiming for the superego. (Coke vs Dry WIne/21 year old scotch).

I have a few questions, please:
1. I have attached my pre-EQ but REW optimised setup and was wondering how good my graphs look?
2. Any advice how I can do measurements through my streamer?
3. I know the common perception is to only correct by reducing hills, not boosting troughs, because that puts extra exertion on the amp and troughs are less audible anyway but does that also apply when the correction is being performed in the digital domain before the DAC?

Thanks again!!!

 

[skid00]

You don't boost steep troughs because those occur when out-of-phase reflections meet direct radiation from the speaker, nulling the signal. You can boost those forever, with little result, while hugely increasing bass in other areas of the room.

If you use the moving microphone method, with pink noise, to measure your frequency response, you can get a better sense of what your speaker is radiating into the room. I also measure close to my speakers (one at a time), to see what they radiate with less intrusion from the room and other object boundaries.

I would analyze your system by feeding the pre-amp. (Is the pre-amp connected directly to the amp? Not sure what you mean with your streamer comments... If you have to, wire laptop directly to amp (well, you need a DAC in there, somewhere!).

 

[JStewart]

2. Any advice how I can do measurements through my streamer

IIRC with the REW signal generator you can record a file for playback. If you can stream local files …

 

[John Mulcahy]

Measuring with file playback