[kach22i]

Originally Posted by aschen

This is pretty much the bible on this sort of thing.
https://www.amazon.com/Sound-Reproduction-Psychoacoustics-Loudspeakers-Engineering/dp/113892136X/ref=sr_1_1?keywords=sound+reproduction&qid=1557327758&s=gateway&sr=8-1

Also REW analysis software is free and you can do quite a detailed analysis with an inexpensive calibrated Mic.

It is however possible to get very good sound in rooms that have some compromises for usability and it doesn't require a phd in acoustics. However putting your stereo on a convenient wall without much thought wont get you there either. 80/20 guideline applies here.

Great information about the software and all, but his unit has all this built-in for the most part.

The link the original poster provided.

https://www.avrev.com/home-theater-av-receivers/av-receivers/b-k-avr307-receiver.html

The interface for the AVR307 is a bit different than other receivers, but once you understand the logic behind it, it easy to set up the parameters of your system. Using the OSD (On Screen Display) for system setup, the menu structure is clear and simply laid out. The initial six menu picks on the main menu allows you to access the two zone setups and the system setup. Starting at the system setup first is the speaker menu for speaker size, location, levels, crossovers and LFE. The crossovers for each speaker can be set from 20-200 Hz in 5-Hz increments, and you can control the crossover slopes in 6 or 12 dB per octave for the surround channels. For the subwoofer, you can change the slope in 12 to 24 dB per octave, or you can use the external crossover setting, which utilizes the sub's internal crossover.

Room equalization can be very powerful if used correctly. The AVR307 allows you to use a test tone that is adjustable from 20 to 300 Hz to determine room modes. By using a SPL meter to measure the most offensive frequency, you can set the notch filter provided at that particular frequency and set up the notch width to have a range that centers on the notch frequency. For example, if the notch is set at 100 Hz, the notch width could be set from 96.6 Hz – 102.4 Hz. All of this is independent of other EQ settings and is engaged full-time. For the detail-minded person, this gives the user the tools to nail a room for the best response. This is the most flexible receiver I've experienced in terms of speaker setup, giving the AVR307 the ability to dial in your speakers to your room like never before. If you have patience, you will be rewarded with the most accurate sound your room might be capable of, especially at this price.

Note, all this technology is not intend to fix poor placement or practices, it is intended to get that last 10% out of your room once you have done everything else right. It can make up for a lot of imperfections but not a miracle worker.