Old Reviews Air pumps???

[akito]

Many auctions do not sell to the usa and they say because the electronics are different. I just thought i could get an adapter. Am i missing something?

 

[JM]

the place to go:

http://www.aquariumguys.com/aquarium-air-pumps.html

 

[JM]

on bungeees inside a cooler or other "noise dampening " box?

 

[akito]

I wish they sold the hailea...

 

[waveguide]

i had the Shittest Air Pump You Can Get.. $5 from petsmart. noisy as hell.

i managed to make it quieter by engineering the cab some.. wedging a bit of dowel at a strategic point inside, or otherwise finding ways to make it resonate/vibrate less...

..the thing about sound is that low frequencies have a long wavelength, and you need thicker material to damp them. that's why you can hear bass from far away... and bass freqs are many feet in length, so you can't damp them easily. so while you can take the high freqs off by putting a pump inside something, there's not much you can do for mids and lows. sometimes a strategic position in the room will help (eg. so that the freqs reflected off the wall cancel them out some..) but that's tricky and will change if you move your head.

i don't know if the rena or fusion pumps sold in the u.s. are any good., they get better reviews.

 

[akito]

I think i am going to try the general hydro. Im still learning hydro and im sure that one puts out more than my 4 combined

 

[JM]

guess you might knw a little RF theory as well huh waveguide?

right on the money mate! :thumbs: point(s) well taken.... so what we need then is an ultra-high frequency air pump... so we can easily suppress the resultant noise...

so lets make a "joule ringer" for the air pump that runs at 5000 Hz...

 

[waveguide]

nah, jus audio.. maybe a little from electronic harassment

ordered the fusion 500.. can't put it to use for a while (haha i can't afford the $6 for net buckets) but i'll be able to report how quiet it is...