Axiom Home Page Forums General Discussion Stereo Out with the new and in with the newer

That's real good to hear. Those distances sound good. It'll be interesting to hear how the sound changes when you mess with BGC.

Update on the 500s: each has no problem with the carcinogenic 15Hz bass test. Can't do 10 Hz like the 800 but definitely 15 and maybe less.

https://open.spotify.com/track/0qm3bEbmYBNVVQMF4KSEeP?si=x56EtfPoT6m8E-7dD5gUiw

Yeah ... meters usually are not spec'ed to be accurate below 30 Hz ... and then they only usually offer A or C weighting ... which I think is aimed at measuring work place noise ...

The A weighting, I believe, displays the relative loudness we actually hear (i.e. compensated for human hearing). C weighting is the most used and I have no idea why but it's closer to flat. Z weighting is absolutely flat and is the one I'm interested in but seems to be offered only in the most expensive models ...

So I'd imagine it's best to measure using C weighting and convert back to flat. C rating is something like -0.5db at 80Hz, -2db at 40Hz, -6.2db at 20Hz, and -8.5db down at 16Hz (compared to A which is -22.5, -34.6, -50.5, -56.7 respectively) ... if your device is capable of measuring it.

Think someone who knows more should respond here.

Rich

P.S. That's probably why your subs were a bit hot ... BTW C is 0db down at 200Hz and if your sub can get up there that's the frequency to use (also 160Hz is only 0.1 db down)

If I used A-weighting, I am sure I'd drive myself deaf. It would just be too darned loud. I think that's why C is used in audio. I have A and C on my meter and my meter is only spec'd good down to 125Hz.

Steely Dan 2AN sounds better on my two systems than in my 13 year-old Mazda.

B.B. Gabor's first album stubbornly continued to sound better in my truck than on my stereo until I got the Sierra-1's and M5HP's.

After that I mostly used the truck (standard AM/FM/CD) audio for news and traffic... until I took the AutoTrain to Florida and someone stole the radio antenna while I was down there.

Gabor? Gabor with Chico Hamilton?

Alright, I have an update regarding Steely Dan's "What a shame about me" on 2AN.

I have two systems: main floor and cave.

Main floor consists of A-LFRs driven by a 1000-8 and a 1000-2. The pre-amp is a Pioneer A9. My two sources are a Pioneer D6 CD player and Spotify over a Chromecast Audio dongle. Both are connected to the A9 using RCA cables. All RCA cables are grungy, 40 year-old, bottom-of-the-barrel.

The cave consists of M100s, 800, and twin 500s - all v4 - driven by a 1500-3. My pre-amp is an Onkyo TX-NR818. Sources consist of a PS3 for CD, a Google Video dongle I used for Spotify and a Firestick 4K that I now use for everything. The cables are mostly grungy like the ones on main.

Main floor: no audible difference between CD and Spotify over the Google Audio dongle.

Cave: Higher and gooder bass output over Spotify using the Firestick 4K compared to PS3 (CD and Spotify) and the Google Video dongle (Spotify). No audible difference between PS3 (CD and Spotify) and the Google Video dongle (Spotify).

Of course this was very scientific, level-matched, blah blah.

I am not at all surprised by these results.The Firestick 4K has proven to be a very good device.

Then I’d go C weighted at 150Hz (that should be in the linear region of both your sub and meter). I’d would not even try and correct for the curve as the offset at 150 is basically insignificant.

It might be an interesting measurement to take at your current settings.

https://www.youtube.com/watch?v=msrn1MpdMd0

Metropolitan Life (first track) is the one that never sounded good on my Axioms. Seems to have been mixed with a bump in the 2-3 KHz range and always sounded best on speakers with the "BBC dip".

Not 100% sure but seems like between v3 and v4 the crossovers might have been tweaked just a bit in that range.