"Wally" wrote in message
...
Keith G wrote:

I've got a *best yet* sound, others have all expressed
delight/amazement and no-one has said they didn't like it! (Yet....)

The stuff about harmonics sounds about right to me. There's no way a pair
of
computer speakers will produce 20Hz that you can reasonably hear. At that
sort of frequency, it's hard to hear it at all, but you can certainly feel
it if it's really there.

My recent DSP dabbling showed me that 25Hz is in line with the following
frequencies (32, 40, 50, 63...), but, subjectively, sounds quieter. That's
two Kef B139s (the big ovalish ones with flat fronts instead of concave
cones), powered by the 50W Cyrus Straightline.


Interesting stuff, Wally.....

Keith G wrote:

Interesting stuff, Wally.....

That DSP gizmo is, without doubt, one of the best bits of audio gear I've
bought. It has utterly transformed the bass. I'll see if I can post a pic
illustrating my current settings, which don't make the sound flat, but give
it a bit of a lift as it goes down.

One of the things I look for is the sort of bass I've experienced when
playing in bands and jamming. When the band's on song, the bass really does
fill the room - deep and smooth, something you can literally feel. Something
happens, emotionally maybe, when it gets like that. It becomes a buzz.


--
Wally
www.wally.myby.co.uk
Stress: You wake up screaming and realise you haven't fallen asleep yet.

Wally wrote:

I'll see if I can
post a pic illustrating my current settings, which don't make the
sound flat, but give it a bit of a lift as it goes down.

Here y'go - my current DSP settings.

http://audio.yachtsea.com/BassDSP.gif

Note the drop around 80Hz, and again at 25Hz. The latter is the resonant
frequency of the driver, not sure what's happening at 80 (and 63). Even with
+9dB on 20Hz, it's near impossible to pick it up, whereas there are
collywobbles at 25 and, to an extent 32. After that, it becomes much more
distinctly an audible rather than a visceral thing.

At the other end of the scale, I threw a function generator at my preamp a
few weeks ago, to see how high it went. It laughed at 100KHz, but looked
rather wayward by the time it got to 4-500KHz. It seemed to be fine at a few
hertz as well, but I can't remember when it barfed (the generator goes down
to 0.1Hz, and I got bored watching the dot slowly make its way across the
scope's display - at a guess, it was probably happy down to 4 or 5Hz). I'm
talking about amplitude of a sine wave, here - I was just look to see when
the signal got noticably attenuated. I was surprised at the HF end!


--
Wally
www.wally.myby.co.uk
Call me a saint, call me a sinner - just don't call me... late for
dinner.

"Wally" wrote in message
news
Keith G wrote:

Interesting stuff, Wally.....

That DSP gizmo is, without doubt, one of the best bits of audio gear I've
bought. It has utterly transformed the bass. I'll see if I can post a pic
illustrating my current settings, which don't make the sound flat, but
give
it a bit of a lift as it goes down.

One of the things I look for is the sort of bass I've experienced when
playing in bands and jamming. When the band's on song, the bass really
does
fill the room - deep and smooth, something you can literally feel.
Something
happens, emotionally maybe, when it gets like that. It becomes a buzz.



Yes indeed - there's the music, then (dare I say it?) there's the 'sound of
music'!!

When people ask me do I listen to the music or the kit, the answer's *both*
but not necessarily at one and the same time!!

;-)