Simple tone control?

D

DaveC

Guest
I'd like to add a simple op amp-based tone control circuit to my preamp for
desktop speakers & sub that I'm modifying from stock.

This is the simplest I found:

<http://www.simplecircuitdiagram.com/2010/02/03/single-op-amp-tone-control/>

(I have +/- supplies so I will be eliminating all coupling caps and changing
Vcc/2 to ground.)

What are the positives and negatives to this design?

Better circuit (yet simple)?

Thanks.
 
"DaveC"

** Too many crossposts by far.

(I have +/- supplies so I will be eliminating all coupling caps and
changing
Vcc/2 to ground.)
Click to expand...

** The TLC2272 IC specified has max +/- 5 volt supplies.




.... Phil
 
This looks a lot like the kind of tone controls mass-market
consumer-electronics equipment has been using for the past 60 years.

I don't know /exactly/ what your plans are, but the 1kHz corner frequency is
about the worst possible if you're trying to correct errors in the speakers
you're designing.

Unless you want a "tone control" that produces shrill treble and boomy bass,
you need to move the treble corner up, and the bass down.

Furthermore, it would make sense to design the speakers first, and see what
sort of correction they need. There are plenty of inexpensive drivers with
relatively flat response (if you believe the spec sheets). Neither they nor
most recordings will need much in the way of correction, so the best tone
control would be one that supplies small amounts of boost and cut at the
frequency extremes.

Unless you're looking for lots of boom and sizzle.

There are plenty of op-amps with a wider voltage range -- the 5534 and
TL-074 come to mind, but these are rather old designs. I'm sure someone will
be able to recommend something newer.
 
"William Sommerwanker "

I don't know /exactly/ what your plans are, but the 1kHz corner frequency
is
about the worst possible if you're trying to correct errors in the
speakers
you're designing.

Unless you want a "tone control" that produces shrill treble and boomy
bass,
you need to move the treble corner up, and the bass down.

Furthermore, it would make sense to design the speakers first, and see
what
sort of correction they need. There are plenty of inexpensive drivers with
relatively flat response (if you believe the spec sheets). Neither they
nor
most recordings will need much in the way of correction, so the best tone
control would be one that supplies small amounts of boost and cut at the
frequency extremes.

Unless you're looking for lots of boom and sizzle.

There are plenty of op-amps with a wider voltage range -- the 5534 and
TL-074 come to mind, but these are rather old designs. I'm sure someone
will
be able to recommend something newer.
Click to expand...
** Every single notion expressed by this congenital wanker is wrong.

In each case, the opposite is true.


..... Phil
 
"Phil Allison" <phil_a@tpg.com.au> wrote in message
news:9iut9lFgl3U1@mid.individual.net...

"William Sommerwerck"

I don't know /exactly/ what your plans are, but the 1kHz corner
frequency
is
about the worst possible if you're trying to correct errors in the
speakers
you're designing.

Unless you want a "tone control" that produces shrill treble and boomy
bass, you need to move the treble corner up, and the bass down.

Furthermore, it would make sense to design the speakers first, and see
what
sort of correction they need. There are plenty of inexpensive drivers
with
relatively flat response (if you believe the spec sheets). Neither they
nor
most recordings will need much in the way of correction, so the best
tone
control would be one that supplies small amounts of boost and cut at the
frequency extremes.

Unless you're looking for lots of boom and sizzle.

There are plenty of op-amps with a wider voltage range -- the 5534 and
TL-074 come to mind, but these are rather old designs. I'm sure someone
will be able to recommend something newer.

** Every single notion expressed by this congenital wanker is wrong.
In each case, the opposite is true.
Click to expand...
When Mr Allison deigns to speak courteously, he is almost always a fount of
useful wisdom. (Seriously.)

But he is completely wrong. I have given good advice. Ignore it at your own
peril.
 
On Nov 21, 3:53 am, DaveC <inva...@invalid.net> wrote:
I'd like to add a simple op amp-based tone control circuit to my preamp for
desktop speakers & sub that I'm modifying from stock.
Click to expand...
It would really help to explain what you mean by that. 6" drivers in
wood cabs plus a 12" sub? Or 2.5" pc speakers plus a 4" sub? Very
different animals.


This is the simplest I found:

http://www.simplecircuitdiagram.com/2010/02/03/single-op-amp-tone-con...

(I have +/- supplies so I will be eliminating all coupling caps and changing
Vcc/2 to ground.)

What are the positives and negatives to this design?
Click to expand...
As said, the odds are the freq response wont match what you want. A 5
band graphic equaliser would be better, and is pretty aesy to make.

Better circuit (yet simple)?

Thanks.
Click to expand...
If you wanted simplest, the circuit can be far simpler if you use the
existing amp's nfb path to simply insert treble & bass boost controls.

Bass boost: Pot and C in parallel in the nfb path,
Treble boost: Pot and C in series from nfb path to ground, after a
resistor.


NT
 
It would really help to explain what you mean by that. 6" drivers in
wood cabs plus a 12" sub? Or 2.5" pc speakers plus a 4" sub? Very
different animals.
Click to expand...
<
http://www.harmankardon.com/EN-
US/Products/Pages/ProductDetails.aspx?PID=SOUNDSTICKS3AM>

The video is pure marketing.

I don't have these speakers, but I do have the original SoundSticks I which
are USB input devices (no analog input). I've converted them to analog input.

Looking for an op-amp-based filter circuit. Anybody have a favorite you can
link to? Or put up an ASCII or Spice diagram?

Thanks.
 
"William Sommerwanker = Fuckwit Jerkoff "

This looks a lot like the kind of tone controls mass-market
consumer-electronics equipment has been using for the past 60 years.
Click to expand...
** So totally proven to be the RIGHT kind for domestic audio.


I don't know /exactly/ what your plans are, but the 1kHz corner frequency
is
about the worst possible if you're trying to correct errors in the
speakers
you're designing.
Click to expand...
** Tone control are mostly used to alter the frequency balance of the
program material.

That is why they have knobs on the front panel......


Unless you want a "tone control" that produces shrill treble and boomy
bass,
you need to move the treble corner up, and the bass down.
Click to expand...

** The type of circuit shown has variable bass corner frequency and variable
slope treble.


Furthermore, it would make sense to design the speakers first, and see
what
sort of correction they need.
Click to expand...
** False assumption that they need any or that it is the main issue.


so the best tone
control would be one that supplies small amounts of boost and cut at the
frequency extremes.
Click to expand...
** Shame about deficiencies in the program itself.


Unless you're looking for lots of boom and sizzle.
Click to expand...

** Or have program lacking in both lows and highs - like many u-tube vids.


There are plenty of op-amps with a wider voltage range -- the 5534 and
TL-074 come to mind, but these are rather old designs.
Click to expand...
** Both those are wrong for the job, the OP need a dual op-amp - so an
NE5532 or a TL072.

Both these are still the most widely used audio op-amps in the world.


I'm sure someone will
be able to recommend something newer.
Click to expand...

** Only an audiophool wanker would.

And look who did.


..... Phil
 
On Nov 21, 10:36 pm, DaveC <inva...@invalid.net> wrote:
It would really help to explain what you mean by that. 6" drivers in
wood cabs plus a 12" sub? Or 2.5" pc speakers plus a 4" sub? Very
different animals.

http://www.harmankardon.com/EN-
US/Products/Pages/ProductDetails.aspx?PID=SOUNDSTICKS3AM
Click to expand...
nothing there

The video is pure marketing.

I don't have these speakers, but I do have the original SoundSticks I which
are USB input devices (no analog input). I've converted them to analog input.

Looking for an op-amp-based filter circuit. Anybody have a favorite you can
link to? Or put up an ASCII or Spice diagram?

Thanks.
Click to expand...
 
http://www.harmankardon.com/EN-
US/Products/Pages/ProductDetails.aspx?PID=SOUNDSTICKS3AM

nothing there
Click to expand...
Yes there is. Maybe you have to copy & paste the URL, but it is valid.
 
"DaveC"


http://www.harmankardon.com/EN-US/Products/Pages/ProductDetails.aspx?PID=SOUNDSTICKS3AM


nothing there

Yes there is. Maybe you have to copy & paste the URL, but it is valid.
Click to expand...

** The link leads to a home page and nothing else.



.... Phil
 
NT wrote...

http://www.harmankardon.com/EN-
US/Products/Pages/ProductDetails.aspx?PID=SOUNDSTICKS3AM

nothing there
Nothing here either.
Click to expand...

I think the HK site redirects if it doesn't think you are in the US.

UK version here
http://uk.harmankardon.com/harman-kardon-product-detail-uk/soundsticks-
iii.html

Recommended by the News Of the World:)

--
Ken O'Meara
http://www.btinternet.com/~unsteadyken/
 
On 11/21/2011 11:47 PM, UnsteadyKen wrote:
NT wrote...

http://www.harmankardon.com/EN-
US/Products/Pages/ProductDetails.aspx?PID=SOUNDSTICKS3AM

nothing there
Nothing here either.

I think the HK site redirects if it doesn't think you are in the US.

UK version here
http://uk.harmankardon.com/harman-kardon-product-detail-uk/soundsticks-
iii.html

Recommended by the News Of the World:)
Click to expand...

You're links are broken/segmented.
<http://www.harmankardon.com/EN-US/Products/Pages/ProductDetails.aspx?PID=SOUNDSTICKS3AM>
Does work...

"Praised for its stunning design, the harman kardonŽ SoundSticksŽ II
speakers and subwoofer system became a milestone in harman kardon
history when it became part of the permanent collection at New York
City’s Museum of Modern Art (MoMA). Improving on its famous sibling’s
pop-culture appeal, the SoundSticks III system is all that and much
more. As a three-piece, 2.1-channel multimedia sound system, SoundSticks
III brings a new level of excitement to music, games and movies to your
home – with its exceptional sound clarity, enhanced color scheme and
bare minimum of wiring. Beyond its eye-catching appeal, SoundSticks III
continues to be incredibly capable – with 40 watts of dazzling
amplification, a down-firing powered subwoofer, eight full-range
transducers and compatibility with all sorts of multimedia devices. As
the sublime sequel to a prized performer, SoundSticks III is performance
art at its finest."

Only $169

Jeff-1.0

--
"Everything from Crackers to Coffins"
 
"Jeffrey Angus"

You're links are broken/segmented.
http://www.harmankardon.com/EN-US/Products/Pages/ProductDetails.aspx?PID=SOUNDSTICKS3AM
Does work...
Click to expand...

** Not from outside the USA it don't.

And the UK one is the same.

How boring of them.


.... Phil
 
On 11/22/2011 12:07 AM, Phil Allison wrote:
"Jeffrey Angus"

You're links are broken/segmented.
http://www.harmankardon.com/EN-US/Products/Pages/ProductDetails.aspx?PID=SOUNDSTICKS3AM
Does work...


** Not from outside the USA it don't.

And the UK one is the same.
Click to expand...
Well that sucks, what's the point of that?

Jeff-1.0

--
"Everything from Crackers to Coffins"
 
On Tue, 22 Nov 2011 00:22:29 -0600, Jeffrey Angus <grendelair@aim.com>
wrote:

On 11/22/2011 12:07 AM, Phil Allison wrote:
"Jeffrey Angus"

You're links are broken/segmented.
http://www.harmankardon.com/EN-US/Products/Pages/ProductDetails.aspx?PID=SOUNDSTICKS3AM
Does work...


** Not from outside the USA it don't.

And the UK one is the same.

Well that sucks, what's the point of that?

Jeff-1.0
Click to expand...
Just need a proxy within the USA - always useful to have one available
for every major country.

d
 
DaveC wrote:
This is the simplest I found:
http://www.simplecircuitdiagram.com/2010/02/03/single-op-amp-tone-control/
Click to expand...

It looks bog-standard to me. Go ahead and use it and use your mind to go
on to greater things! :)

Cheers!
Rich
 
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