[Sirfishalot]

I have a color document that is 33" x 17" and will be outputing to a color postcript device with a 150 dpi resolution.
I want to print it at twice the original size (66" x 34), should increase the dpi of the document to 300 dpi when I enlarge it or will it not mattter since the max resoulution of the printer is 150?

Thanks

[godzookie2k]

what kind of document is it? Photo? Vector/Type? If its a photo you can't just willy nilly increase the dpi. You'll lose image quality fast. You can taketh away, but you can't giveth. Same goes for size. Vectors you can increase in size until the cows come home, since they are just math equations. So, if its photographic I'd recommend getting it rescanned at the higher size/resolution and having your document set up to the size it should print at, if its just type, then just scale it up in illustrator. Also, what you are getting it printed on factors in too.

[MikeM33]

The thing with real large formats is you can sometimes get away with the lower resolution. Of course I'm talking several hundred feet x several hundred feet. Because something that big isn't going to be viewed from just a few feet away. Place I worked at briefly last year did gigantic museum/sports arena style banners on fabric. We'd actually output these large panels of dye sub prints at resolutions as low as 72 - 100 dpi. But when viewed from the proper/expected viewing distance you never even notice all those huge "blocks" (pixels).

This thing you're printing sounds to be about the size of the garden variety household door. My guess is it will look just fine at 150 dpi. Besides as godzookie mentionned you never want to "up" the resolution on anything other than vector graphics because you'll just lose image quality. Even if you did boost the resolution you still can only output at 150, so you're kinda stuck.

Or to answer you're question directly, it won't matter.

MikeM