The first hifi room I visited is Mr. foong house, he has the room ratio of L=24ft, w=15ft, H=7.9 ft at front and H=8.6ft at listen position. ratio is H x W X L ( 1: 1.74: 2.79). He used fiber board for ceiling front and side and various bass panel absorber. His room RT30 from 300hz to 20 Khz is within 0.3 to 0.4, from 30hz to 300hz , range from 0.5 to 0.7. This is a very well acoustic treated room, the ambient sound is just nice, not dark or over live. The waterfall or spectrogram also well behave without any resonant, only room resonant freq is at 22.15 Hz due to length of the room, but listen to music has no issue as seldom we have 20 Hz to excite the room mode.
He use AR preamp with jadis power amp to drive the Apogee signature Duetta, spk cable is Nordost valhalla and some Ordin I/C. Well, if you like Apogee sound, this is a dream hifi heaven, the Apogee spk strength is exhibit to full here! The wide sound stage and layering depth is the strength of this spk, Play some big ambient music like raining or thunder , you will be transport to nearly live! the presentation is very 3d and real...play some female vocal, the speaker can really sing as if the singer is right in front of you. For big Panel speaker, you really need the large room space for the speaker to breath... so for the rest of time, we just listen to different disc, you will never get fatigue listen to a well tune hifi system...a must visit for any user who like Apogee sound.