I bought (oops, my wife bought me) one of these for Xmas. I have been looking at it since it came out, finally took the plunge.
I am using it in a decent audio system, between a McIntosh C220 tube pre and a pair of Bottlehead Paramount 300B SET tube amps (along with a powered sub) in 2.1 mode. My Triangle Titus monitors are 6' from my ears, and currently 6' apart. The sub is along the front wall (the corners of the room are 'cut' at a 45 degree angle). The room is 13'W x 23'L x 10' ceiling. My chair is 13' from the front wall (~a foot or so back from being centered in the room).
No 'real' room treatment (allowed) since it's a living/dining room
, but it isn't overly live ...
There are modes at 50, 100, 200 Hz; hoping to flatten them somewhat with ERGO (and provide hopefully overall better sound thru the mids/highs that folks have mentioned). I know ERGO only works from 20-500Hz.
I hauled my iMac out to the listening room and ran some cals, listened, didn't hear much 'correction' or differences (altho my 'score' was only 14). I did the cals at less than 'desired' volume, so did another cal with I think -10dB read on the cal display. It was pretty loud (maybe louder than I like to listen, which is only about 70dB SPL or so average).
I set the crossover to 60Hz (and the dial on my sub to ... 100Hz, I think. It was at 60Hz previously, and phased using the Rives measurements previously).
I did some measurements using a RS SPL meter and Rives test tones ('corrected' in the low bass for the RS meter), using 70dB SPL as the '0dB' point at 1kHz. I'm a bit disillusioned, as these show not much difference (well, except 'worse' near 100Hz) between 'focus' and 'bypass', with the modes/'nulls' still there. I think the SPL meter was within a couple inches (at most) of the 'focus' cal mic position, and pointed forward. This process is VERY tedious, so I want to use the Room EQ Wizard to do some (hopefully easier) more comprehensive tests. Maybe even 'averaging' over a small area like JA does in Stereophile.
I expect to see a fairly flat response in focus mode ... or at least much closer than in bypass!
Maybe my measurement method is flawed ... but seems 'OK' to me. I know 70dB SPL is 10dB lower than Rives recommends, but I already freak my animals out doing it at this level ... and the +15dB tones at 50Hz are rattling things in the room. Sheesh.
I have scanned over/read all 877 posts ... haven't found a definitive answer to whether the supplied mic can be used with +48V phantom power (some folks (in other forums) say 'yes'). This response:
Originally Posted by KRKService
Well, The mic used with the interface is given 15v Phantom Power. It is really only made to calibrate the room.
doesn't really sound too 'authoritative' to me, since others have suggested that the mic is a Behringer ECM8000 (altho the current ERGO mic doesn't look exactly the same). The ECM8000 can be used from +15 to +48V, so ... ???
I am hoping that the mic can actually
be used with a mic/USB converter (or small/inexpensive mic pre), which only supplies +48V AFAIK. Doesn't make sense to me that KRK would use a 'custom' mic that only accepts +15V and can be damaged by +48V.
The good news to my ears is that the ERGO doesn't 'mess things up' as far as imaging, resolution, etc.. The converters etc. seem pretty darn good to me, and I haven't had any of the issues the early users experienced. I am hopeful that it can do more to get a flatter response (as 'advertised').
I do want to use my wife's Windows 7 laptop from now on (for cals and Room EQ Wizard measurements), tho, so ...??? what's the latest verdict on this?
Would boosting the volume during cal to '0dB' result in a 'flatter' response? or any other tricks to get it to do so? I think one could dial in a 'flat' response manually (with an EQ), but having the phase correction (or at least non-shifting) is important as well (and the 'automatic' functionality). That's why I got the ERGO and not something else.
TIA for (friendly and informative, if possible) comments.