CurtPalme.com Home Theater Forum

[Corleone88]

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Hi,

Could we get a cleaner picture on our CRT pj if we 'filter' the electrical signal before entering the pj?
Thanks

[kal]

I don't think there's a black and white answer to this that can be used in all situations.

Depends on how noisy your power is.
Depends on how your projector is designed (how well it rectifies/filters/uses power/etc).
Depends on how much the viewer notices too.

As an electrical engineer, I've never been big on the idea of power cleaning before feeding to products. If a product needs very clean power to operate correctly or look good, it should do something internally to ensure that the power is clean. Otherwise how the product behaves is too reliant or too tied to the mains power coming in.

The better the performance of the product the more closely they'll look at this (if it matters) and ensure that power cleanliness isn't an issue so it's generally not an issue on higher end products where they don't mind spending a bit of $$$ on clean rails. A $10 product on the other hand is probably going to have poor performance to begin with when compared to a $100 product that does the same thing so no point in applying clean power to that $10 product. It's not going to turn it into a $100 product. The customer buying the $10 product isn't gone to care anyway.

On devices that completely rectify the AC to DC on input, any pre-cleaning seems especially silly to me.

My 2 cents!

Kal

[kal]

I don't think there's a black and white answer to this that can be used in all situations.

Depends on how noisy your power is.
Depends on how your projector is designed (how well it rectifies/filters/uses power/etc).
Depends on how much the viewer notices too.

As an electrical engineer, I've never been big on the idea of power cleaning before feeding to products. If a product needs very clean power to operate correctly or look good, it should do something internally to ensure that the power is clean. Otherwise how the product behaves is too reliant or too tied to the mains power coming in.

The better the performance of the product the more closely they'll look at this (if it matters) and ensure that power cleanliness isn't an issue so it's generally not an issue on higher end products where they don't mind spending a bit of $$$ on clean rails. A $10 product on the other hand is probably going to have poor performance to begin with when compared to a $100 product that does the same thing so no point in applying clean power to that $10 product. It's not going to turn it into a $100 product. The customer buying the $10 product isn't gone to care anyway.

On devices that completely rectify the AC to DC on input, any pre-cleaning seems especially silly to me.

My 2 cents!

Kal

[Corleone88]

Thanks (again) Kal

[kal]

Now that said, give it a go if you want, but make sure to let us know what you think along with the equipment you used and what you did!

I know there are lots of audiophiles that are deep into power conditioning / filtering equipment but I generally don't see the value and it's not because I don't want to spend the money... The irony is that some will throw a really expensive (high end) power conditioner in front of a really expensive (high end) piece of electronics that already has everything it thinks it needs to be top of the line in terms of power management. Kind of a waste of money if you ask me.

Kal

[kal]

Now that said, give it a go if you want, but make sure to let us know what you think along with the equipment you used and what you did!

I know there are lots of audiophiles that are deep into power conditioning / filtering equipment but I generally don't see the value and it's not because I don't want to spend the money... The irony is that some will throw a really expensive (high end) power conditioner in front of a really expensive (high end) piece of electronics that already has everything it thinks it needs to be top of the line in terms of power management. Kind of a waste of money if you ask me.

Kal

[mp20748]

[kal]

[kal]