We use a MiniDSP Flex in the living room. It suits us very well as a "preamp" and we actually use all the inputs on it.
- Analog input is for the turntable, using the
ART Precision phono preamp
- Optical input is for the HDMI switch and audio extractor, which connects to the video streamer (Roku) and a BluRay/DVD player.
- Coax connects to the Wiim Pro audio streamer (for lossless streaming from Amazon Music and my media server with ripped CDs)
- Bluetooth is useful for the phone, e.g. podcasts and audiobooks
- USB connects to the Raspberry Pi which runs Volumio, which we don't really need any more given the WiiM and bluetooth
Output of the MiniDSP Flex goes to a
@Buckeye Amps Hypex 250 Wpc amp which feeds Ascend Sierra Tower loud speakers.
We think it sounds real good. After we got the MiniDSP and set it up using measurements there was no longer any need to adjust the volume control while watching TV and movies. Previously it was necessary because if we set the volume loud enough to hear the dramatically quiet dialog (directors love it when actors whisper) then the dramatic music and dramatic sound effects are too loud. I don't know why for sure but I take this as a sign that something is "better" that the problem is gone. It is certainly more comfortable.
In my office/study/studio I use Equalizer APO on the Windows OS. I need to do the room EQ again because we just installed two rugs in there, each thick wool rug from India 3 x 2.4m. One is on the wall. Once again, this was not
simple but now it is done and we like it. What do you think?
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I like the engineering principle that things should be as simple as possible but not more simple than that. In other words, simplicity/complexity is constrained by requirements. In the case of high quality audio reproduction the requirements are stringent and the acoustical problems are complex. I am grateful that we can use measurements and equalizers to sort out some of the problems.