Do we need compensate Hi-lo FRQ after use attenuators

[kldguitar]

When we use attenuator lower the loud, there is other problem. The hearing of people is sense to lower and high FREQ in high volume, but sense to middle FRQ in lower sound.
So when we use L-pad to attenuate the power, Do we need add compensated net to compensate hi and low FRQ?

[J M Fahey]

When we use attenuator lower the loud, there is other problem. The hearing of people is sense to lower and high FREQ in high volume, but sense to middle FRQ in lower sound.
So when we use L-pad to attenuate the power, Do we need add compensated net to compensate hi and low FRQ?

Yes, you *should*, but it's not easy.
Being passive devices, there's not that much you can do.
I've seen high frequency compensators, in the form of a 3 position switch, parallelling a capacitor ewith either leg of the resistive attenuator, or unconnected.
It's usually called something like "bright/flat/dark" or similar and works reasonably well.
Now doing the same with low frequencies becomes complicated and expensive.

[Chuck H]

Fahey,

Unless you want to perpetuate the market flood of imported crap, don't feed this troll.

Dig around and you'll see what I mean.

Chuck

[J M Fahey]

Ok, Chuck, thanks.
EDIT:
Now I see, we are some chinese factory R&D team, as well as unpaid think tank.
Mind you, I've seen *everywhere* untrained chinese popping up, asking incredible questions such as "what is bias", yet offering visually well made products, often offering partnerships, distribution deals, the works.
I am sure they are OEM factory workers, quite unskilled, that want to start their own business and milk the fat US cow.
Mind you, the full responsibility of this state of things lies with US government itself.
To get somewhat cheaper products they killed US jobs and are feeding a monster that will eat the world.

[Chuck H]

Mind you, the full responsibility of this state of things lies with US government itself.
To get somewhat cheaper products they killed US jobs and are feeding a monster that will eat the world.

Amen! You could start a new church on that statement alone. Unfortunately "well being" is relative. If the US is such a fat cow, how come we have the hardest working work force in the world? With less paid time off and fewer benefits than most other countries? The economy being what it is, I find myself making decisions that actually support the calamity your forcasting. I don't want to. And it may only be my choice to buy a "more affordable"... whatever, made in China. But the kid needs shoes and school supplies and I'm a painting contractor for a day job. Not many calls lately. It's a hard life for everyone right now and I've had to resign my option to buy only US in favor of the needs of my family. I hate it but I think any man would do the same. Sometimes you just do what you have to and hope the people who CAN do something will. Not to sound pathetic, but that's how it really is.

Damn NAFTA and all. If we implemented import taxes that were scaled reletive to US standards of labor practices, prices would be the same across the board. We could improve circumstances for the work force in other countries and the value of the US dollar would be more stabil on the international market. This is something we CAN do. We are the WORLDS BIGGEST MARKET. We can call the shots and set the standards. But we don't because there are individuals that do better with the current policies. Damn the masses. But that's capitolism idn't it...

Chuck

[kldguitar]

please only discuss tech problem

I checked the reply . we wanted to add EQ after attenutor or Freq compensate net. But we don't know why THD hot plate so expensive. Present we know it, this FRQ circuit is simple in principle, but it need high voltage Resistor and acurate Cap. so it is expensive.

[Chuck H]

done

[yunger]

In china many people hate US people too, US people use USD which's value will be lower and lower, to buy our source which will be fewer and fewer.Who loss? who win? USD only papaer, our coat, steel is source. Our enviroment become bad and bad because the US people's greedy.

yes, there are greedy people in the US just like there are greedy people in china. for that matter, there are opportunistic, selfish people in the US just like in china. it's interesting that your comment about chinese hate for Americans is directed at primarily the same people who you ask advice. interesting business strategy. anyway, your environment becoming bad and bad are solely a result of your own priorities and choices...again, just like we have to deal with our own choices.

btw. i'm not proud of myself for replying to this. this thread is running over with human nature getting the best of us.