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Old 14th June 2012, 03:46 PM   #1
M Gregg is offline M Gregg  United Kingdom
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Default Loudness controls

I thought,

It would be interesting if people could add links or circuits for Loudness controls for tube circuits..I noticed some people still use them..
I guess it would be interesting for comments as to the the use<<or are they worth using??
If they are worth using which topology is the preferred and why?? (Passive, active, tapped volume,)

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M. Gregg
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Old 14th June 2012, 04:54 PM   #2
M Gregg is offline M Gregg  United Kingdom
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Other linked information,

Its old but still relevant..

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M. Gregg
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Old 14th June 2012, 05:16 PM   #3
M Gregg is offline M Gregg  United Kingdom
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Just for interest...
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Old 14th June 2012, 09:11 PM   #4
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I lost my loudness control when the volume control pot wore out on my dynakit PAS2 preamp. I liked the loudness function fine. I had a **** of a time finding a 250 k log stereo pot, much less one with a loudness section, too. I modded a disco mixer to replace the preamp before I found a pot. The replacement pot I got from stereo cost cutters in 1980 was a dynaco reject, the shaft was too tight. It had to be turned by vice-grip pliers. Bet this new pot doesn't last 19 years, either. Mil-spec copy analog parts are as dead as the dodo bird. I was laughing all through college in the seventies, everybody in the dorm had these import receivers that the volume and tone controls were bad in the second or third year. My best friend's Heathkit developed the same problem. Meanwhile the dynaco ST35's in the college library listening rooms just plowed on, impervious to constant use. I was lucky to find a used set in 1970, just needed new e-caps and rectifier tubes.
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Old 3rd July 2012, 06:17 AM   #5
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Smile Loudness controls

Hello All,

Heaven forbid line level equalization controls.

In the old days it was built into my PAS 2. Then we read about the “recommended” mods that removed the tone controls and loudness controls.
Now I am scratching my head over baffle step correction for my home brew speakers. In the old days this is when I would kick in the loudness control on the Pas 2.

Decision made, I am pulling the original old PAS 2 off the shelf to recall what tone and loudness controls are about.

All for Fun
DT
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Old 3rd July 2012, 08:00 AM   #6
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I have a bunch of piher 50x2 with "bass tap" you can have if you want.

Click the image to open in full size.

Wasn´t it called hearing compensated volume control or something like that ?
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Old 3rd July 2012, 12:25 PM   #7
TheGimp is offline TheGimp  United States
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I never found much use for the tone control, but when I was in college I used the loudness control when I turned the stereo down for background music when I was studying.

Any more I play the system loud enough that the it is not necessary.

Nice Articles.
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Old 3rd July 2012, 03:48 PM   #8
smbrown is offline smbrown  United States
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I have often thought that baffle step correction was essentially like a "fixed" loudness control. Personally, I like using a loudness control for low level listening. I'd add one to my existing preamp if I had the correct parts to do it.
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Old 5th July 2012, 07:44 AM   #9
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The Yamaha Natural Sound series solid-state amplifiers had a separate loudness control next to the volume. One set the volume to comfortable levels, then used
the loudness knob to reduce the sound without losing the lows and highs.
Can't think why this circuit could not be used with a valve circuit. Also, it does
not require a tapped-track potentiometer.
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