motleypixel
Member
- Joined
- Jul 12, 2025
- Messages
- 11
The punchline here is if I should further “manually” tweak my RC PEQ and if so what bumps (up/down) would you do? For starters, after some trial and error with my active Definitive Technology SuperCube II subwoofer I found that setting volume at about 40% on the sub and phase from 0 degrees to 180 degrees provided the best starting point. When calibrating sync of sub to my mains with phase at 0 it would always adjust between 5ms and 13ms but when setting to 180 it was always 0ms in-sync. So my assumption here is 180 is better than 0 for this control on the back of the sub.
After this I used REW connected from my PC’s sound card (created cal file for it too) to the line-in of the Ultra. Line out of the Ultra went to my Fosi BT30D Pro (tone controls set to 12 o-clock/flat and volume around 90%) that feeds my two NHT SuperOnes which are 8ohm 88db sensitivity speakers. I used a Umik-1 with horizontal cal file via USB input on my PC sitting at my prime listening position. Brought SPL 75db and did a 512k sweep with 1/6smoothing. This is the red freq sweep in the attached image. I then left the WiiM at the same volume level and moved the Umik-1 over to my iPad with the WiiM app and performed a RC. The settings for RC were B&K target curve, freq 20-1000Hz (not understanding why many keep the upper around 400Hz, why not cal the full range? It certainly defaults to a much larger range?), max/min gain at 10/-10db, Max Q at 7 (found explanation about this setting, seems 5 could be too conservative, so I thought 7 is a good starting point?), sub calibration on, smoothing 1/6th, and multiple measurements enabled (it does 3 sweeps and averages them I think?).
So, after this I can see it really did well flattening the curve. This is the yellow curve. The blue curve is one with stock RC settings and when my sub was at 0 degrees phase, which I didn’t like as much. So, with focus on both the red and yellow curve there are a couple of -db peaks I’d like to question if I could possible manually tweak and improve? There is an ~8db dip between 65 and 85hz, an ~6db dip between 110 and 160hz and I think you get the point. The peaks here are about half-way between each range and I would only really be concerned for issues greater than 5db (realistically). Thoughts?
Thank you.
After this I used REW connected from my PC’s sound card (created cal file for it too) to the line-in of the Ultra. Line out of the Ultra went to my Fosi BT30D Pro (tone controls set to 12 o-clock/flat and volume around 90%) that feeds my two NHT SuperOnes which are 8ohm 88db sensitivity speakers. I used a Umik-1 with horizontal cal file via USB input on my PC sitting at my prime listening position. Brought SPL 75db and did a 512k sweep with 1/6smoothing. This is the red freq sweep in the attached image. I then left the WiiM at the same volume level and moved the Umik-1 over to my iPad with the WiiM app and performed a RC. The settings for RC were B&K target curve, freq 20-1000Hz (not understanding why many keep the upper around 400Hz, why not cal the full range? It certainly defaults to a much larger range?), max/min gain at 10/-10db, Max Q at 7 (found explanation about this setting, seems 5 could be too conservative, so I thought 7 is a good starting point?), sub calibration on, smoothing 1/6th, and multiple measurements enabled (it does 3 sweeps and averages them I think?).
So, after this I can see it really did well flattening the curve. This is the yellow curve. The blue curve is one with stock RC settings and when my sub was at 0 degrees phase, which I didn’t like as much. So, with focus on both the red and yellow curve there are a couple of -db peaks I’d like to question if I could possible manually tweak and improve? There is an ~8db dip between 65 and 85hz, an ~6db dip between 110 and 160hz and I think you get the point. The peaks here are about half-way between each range and I would only really be concerned for issues greater than 5db (realistically). Thoughts?
Thank you.
