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Gear / Technical Help => Battery Boxes, Preamps, Mixers, ADCs, and Processors => Topic started by: kylieshotpants on August 06, 2011, 06:15:20 AM

Title: Should there be any difference in 9v battey boxes from different makers?
Post by: kylieshotpants on August 06, 2011, 06:15:20 AM

Hi


I was wondering should there be any difference in 9v battey boxes from different makers, I own a stealth one from Church Audio and one from Sound Professionals?

Title: Re: Should there be any difference in 9v battey boxes from different makers?
Post by: hi and lo on August 08, 2011, 09:40:32 AM

Beside build quality and design, sure. Depending on what values are used for the dc blocking capacitors, bass roll-off could be dramatically different. Without knowing the input impedance of your recording devices and the exact capacitance of the blocking caps, it's impossible to say how much roll-off is being applied. I wouldn't trust any manufacturer claims unless they provide you a chart specifying these mystery values.

Title: Re: Should there be any difference in 9v battey boxes from different makers?
Post by: Church-Audio on August 08, 2011, 10:08:05 AM

Quote from: kylieshotpants on August 06, 2011, 06:15:20 AM

Hi


I was wondering should there be any difference in 9v battey boxes from different makers, I own a stealth one from Church Audio and one from Sound Professionals?

I cant speak for SP but I use good quality caps and good quality metal film resistors and good quality switchcraft or Neutrik connectors. I dont use cheap shit to make a battery box. I use high value caps that dont give you a roll off. Unless thats what you want. And yes its based on input impedance. All battery boxes I make are designed to be flat from 20hz to 20khz from 5k to 10k input  impedance.

Title: Re: Should there be any difference in 9v battey boxes from different makers?
Post by: kylieshotpants on August 09, 2011, 02:32:55 PM

Thanks for the help- I've got a new recorder and mics and am trying to find a good level - but was wondering if the different battery boxes would offer slightly different results

Title: Re: Should there be any difference in 9v battey boxes from different makers?
Post by: Fried Chicken Boy on August 09, 2011, 09:35:54 PM

Interesting thread.  Is there a (relatively easy) way to test a battery box to see if it's passing a fairly neutral signal or rolling off frequencies?  Perhaps generating a series of different frequencies and feeding them through the BB's input?

Title: Re: Should there be any difference in 9v battey boxes from different makers?
Post by: Church-Audio on August 11, 2011, 07:21:17 PM

Quote from: kylieshotpants on August 09, 2011, 02:32:55 PM

Thanks for the help- I've got a new recorder and mics and am trying to find a good level - but was wondering if the different battery boxes would offer slightly different results

Most battery boxes work the same. The only ones I recommend staying away from are any that operate on small coin cells. They are unreliable and fail often. Coin cells are not a good choice for powering mics.