Tama kayo sir, mukang maganda nga ang AAUDIO kaya lang no budget pa kasi kaya maximize lang muna kung anong meron. And as far as i know, maganda ang frequency range ng mga speakers nya, so comparable to sa mga magagandang branded speakers. Nag-expect lang kasi ako na dahil mukang magaling ang pagkakagawa ng Audyssey algorithm e magagawa nyang tumunog ng maganda kahit na hindi naman ganon kaganda ang speakers mo. Pero sabi nyo nga baka yan lang ang inakala nyang kaya ng speakers ko kaya sa ganyan nya sinet. Pero ang nakakatawa dito nung ng magmanual set nako to cover full range, naging maganda na ang tunog. So kung magagawa yun ng Audyssey by itself (without manual intervention) then mas bibilib ako sa kanya...
Since these speaker set is from an HTIB, then I sincerely believe na kaya nyang icov ang full range. Dahil hindi namn siguro gagawa ang isang known brand like PANASONIC ng HT system which will leave a gap on the frequencies, making the sound innacurate.
We can get a little more technical ... After the Audyssey MultEQ calibration, it set the crossover to 150 Hz. That means that at 150 Hz, the frequency response was more than 3 db down and the speaker was at the limit of its flat frequency response. MultEQ will create a frequency and time domain correction filter only down to 150 Hz and not any lower. Otherwise, if MultEQ were to correct even below what the speaker is capable of delivering (in this case, 150 Hz), it might strain and even destroy the speakers.
In reality, however, the output of the speakers does not abruptly stop at its -3db point. Therefore, it is possible to lower the crossover below 150 Hz (say down to 120 Hz) and the speaker will produce sound from 120 - 150 Hz. However, the sound will not be corrected by MultEQ and it will likely be low in volume. On the other hand, if you have a subwoofer which can handle up to 150 Hz, you could keep the crossover at 150 Hz.
With regard to the quality of HTIB speakers by Panasonic or any other big-name brand, I guess you are entitled to your own opinion. Frankly, I think that in general, Japanese manufacturers (Panasonic, Sony, JVC, Denon, etc.) are pretty good at electronics. For speakers, however, they aren't very good - lalo na siguro kung HTIB because the budget is limited.