Specialists > Audiologists
That fine line
P.I.:
Yeah, that "Loudness" contour was the only frequency control I would use during the way back era. Always on at low levels and off at high levels. There was that in-between volume that always was way too thick sounding.
Don: an ad copywriter can say anything in print, but they can't warp physics in reality. Advertising writers and political speech writers should all be distrusted! :^o
steve:
--- Quote from: dflee on June 16, 2021, 06:51:10 AM ---Well, that is something I'll reread a few more times.
Is that why speaker manufacturers develop speakers with humps in certain areas? To
make up for that natural loss at certain frequencies at certain levels.
"floorstanding speaker delivers the series’ signature clarity and articulation along with visceral bass. The system will suit larger listening environments but is capable of revealing a huge dynamic range even when played at low volumes in smaller rooms"
This is taken from an advertisement for a speaker. After reading F-M Curve article can it be taken seriously?
Thanks
Don
ps: Forgot all about the loudness button (dang).
--- End quote ---
Yes, the F.M. curve can be taken seriously, RCA Radiotron Designers Handbook uses the graph in their discussions. Scott has it right, just use a loudness button, or use a Bass control with different spl levels, with a bypass switch to remove/bypass the control/parts out altogether at high spl levels. The switch will probably affect the sonics a little, but less than all the connections and parts.
cheers
steve
James Edward:
--- Quote from: steve on July 11, 2021, 03:04:21 PM ---
--- Quote from: dflee on June 16, 2021, 06:51:10 AM ---Well, that is something I'll reread a few more times.
Is that why speaker manufacturers develop speakers with humps in certain areas? To
make up for that natural loss at certain frequencies at certain levels.
"floorstanding speaker delivers the series’ signature clarity and articulation along with visceral bass. The system will suit larger listening environments but is capable of revealing a huge dynamic range even when played at low volumes in smaller rooms"
This is taken from an advertisement for a speaker. After reading F-M Curve article can it be taken seriously?
Thanks
Don
ps: Forgot all about the loudness button (dang).
--- End quote ---
Yes, the F.M. curve can be taken seriously, RCA Radiotron Designers Handbook uses the graph in their discussions. Scott has it right, just use a loudness button, or use a Bass control with different spl levels, with a bypass switch to remove/bypass the control/parts out altogether at high spl levels. The switch will probably affect the sonics a little, but less than all the connections and parts.
cheers
steve
--- End quote ---
I don’t know what equipment you have, but I would seriously consider this, or something similar from another company. https://www.svsound.com/products/sb-1000-pro-subwoofer
They have a true free tryout period- free shipping both ways. I’m not a shill for SVS- I use Hsu for my sub- but Hsu doesn’t offer the remote adjustment of the SB1000.
It has speaker level inputs, which will work if you don’t have bass management built into your equipment. Most of what us 2 channel old codgers use doesn’t.
Just as importantly, you can turn it on, off, and adjust it from your phone or ipad. There is your ‘loudness’ control…
I’ve been battling bass issues, and a sub is sometimes a good answer.
steve:
--- Quote from: James Edward on July 12, 2021, 05:22:59 AM ---
--- Quote from: steve on July 11, 2021, 03:04:21 PM ---
--- Quote from: dflee on June 16, 2021, 06:51:10 AM ---Well, that is something I'll reread a few more times.
Is that why speaker manufacturers develop speakers with humps in certain areas? To
make up for that natural loss at certain frequencies at certain levels.
"floorstanding speaker delivers the series’ signature clarity and articulation along with visceral bass. The system will suit larger listening environments but is capable of revealing a huge dynamic range even when played at low volumes in smaller rooms"
This is taken from an advertisement for a speaker. After reading F-M Curve article can it be taken seriously?
Thanks
Don
ps: Forgot all about the loudness button (dang).
--- End quote ---
Yes, the F.M. curve can be taken seriously, RCA Radiotron Designers Handbook uses the graph in their discussions. Scott has it right, just use a loudness button, or use a Bass control with different spl levels, with a bypass switch to remove/bypass the control/parts out altogether at high spl levels. The switch will probably affect the sonics a little, but less than all the connections and parts.
cheers
steve
--- End quote ---
I don’t know what equipment you have, but I would seriously consider this, or something similar from another company. https://www.svsound.com/products/sb-1000-pro-subwoofer
They have a true free tryout period- free shipping both ways. I’m not a shill for SVS- I use Hsu for my sub- but Hsu doesn’t offer the remote adjustment of the SB1000.
It has speaker level inputs, which will work if you don’t have bass management built into your equipment. Most of what us 2 channel old codgers use doesn’t.
Just as importantly, you can turn it on, off, and adjust it from your phone or ipad. There is your ‘loudness’ control…
I’ve been battling bass issues, and a sub is sometimes a good answer.
--- End quote ---
Hi James,
Check the bottom of my post for components. :)
I have a parallel adjustment control on the 11A Line Preamplifier to compensate for different amplifier input impedances (Z). My 25PPT monoblocks have switchable treble and bass controls (parallel parts in power supply) to compensate for tube near end of life aging, for personal adjustments and screwy room and components.
There has never ever been a sub I have liked, so won't use them. I would rather use a large box design, each with a woofer. No worries concerning stereo imaging. Response is -3db at 28hz and easily reproduces to 20hz.
I use a 12" woofer, with Qts I wanted, and modified 4" full range driver. The crossover is a quasi 2nd order ~165-170hz, with 2 control adjustments, each down to hundreds of thousandths of an ohm adjustment. (This requires the amp/speaker connections to be pristine and quite tight as well.)
cheers
steve
James Edward:
I was replying to Don’s original post. I’ll bow out now.
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