Originally Posted by David HT guy
I have a very basic question, as I am just learning about eq for subwoofers. I read that a flat response is actually not preferred. What is desired is a "house curve," with more emphasis on the lower frequencies. You may have already answered my question, but in a more technical way. My question is does the 8033 give the option to have different frequency curves so that I can pick which sounds best to me?
8033 has 3 different "house" curves, flat and two boosted (one around 20-40Hz and the other around 30-60Hz). However, you can also calibrate the 8033 with subwoofers lowpass on "flat", keep the 8033 on "flat" and after calibration use the lowpass of the subwoofer to achieve any kind of "house curve".
The flat is all flat down to 5Hz, and here are the other two presets (sorry about the image quality). The boosting presets also activate infrasonic filter, so that the frequency content below 15Hz is suppressed to avoid the subwoofer amplifiers clipping or excessive cone movement. In "flat" there is no infrasonic filter, the 8033 will go the way down below to 5Hz (-3dB). The ADC and DAC have very steep DC-blocks on 8033. So unlike some other auto-EQ, 8033 can be used with ultra-low reproducing subs (frequencies below 10Hz). The correction range, however, is 16Hz -144 Hz.
Considering the SRRs question about priority on the first measurement point: Yes, the first point is treated as the primary point, giving it more weight compared to the following points. For example if you have a couch, the center can be used for primary calibration, and sides as secondary. This way the sides on the couch will get rather good response, but not so with too much cost on the response of the center position