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Old 22nd February 2006, 06:28 PM   #1
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Default Info on Resistors / series resistance

I am experimenting a bit with open baffles and lower Q drivers. I know, not ideal. But, I plan to roll off the bottom end to a woofer in the end anyway, so I'm not concerned about lower bass.

So my question is, if I were to purchase a handful of resistors to experiment with, what kind would I get? I was looking at Parts Express, and there are a variety of different kinds available, such as this list:

Non-Inductive
1/2 Watt Flameproof
1 Watt Flameproof
5 Watt Wirewound
10 Watt Wirewound

I'm planning on lower values, maybe between 2 and 5 ohm or so.

Any thoughts are appreciated! I'm working with the FE166ESR and the FE168E Sigma at the moment and will most likely decide between them for the final project. Note that I'm not trying to get any real bass out of them, just balance them out a little.

I'll post thoughts once I spend a little time with them. Thanks for your help.
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Old 22nd February 2006, 06:52 PM   #2
Stocker is offline Stocker  United States
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Use this to figure out what rating you will need. You *do* know how much voltage and/or current your amp will be putting out, right?
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Old 22nd February 2006, 07:00 PM   #3
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Stocker - Thanks for the response, but you're link doesn't seem to be working.

As for my amp, I actually don't know, beyond the 40 or so watts it puts out. I'm running an Audio Zone Amp-1 prototype. It has no literature at all with it.

Any thoughts?
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Old 22nd February 2006, 07:51 PM   #4
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One thought, is there a way to figure this out with a volt meter? If so, what would the result mean in this case? Thanks.
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Old 23rd February 2006, 01:42 PM   #5
Stocker is offline Stocker  United States
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Sorry, I was tired; that was a local file. I got it from here
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Old 24th February 2006, 03:59 AM   #6
soongsc is online now soongsc  Taiwan
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Default Re: Info on Resistors / series resistance

Quote:
Originally posted by one1speed
I am experimenting a bit with open baffles and lower Q drivers. I know, not ideal. But, I plan to roll off the bottom end to a woofer in the end anyway, so I'm not concerned about lower bass.

So my question is, if I were to purchase a handful of resistors to experiment with, what kind would I get? I was looking at Parts Express, and there are a variety of different kinds available, such as this list:

Non-Inductive
1/2 Watt Flameproof
1 Watt Flameproof
5 Watt Wirewound
10 Watt Wirewound

I'm planning on lower values, maybe between 2 and 5 ohm or so.

Any thoughts are appreciated! I'm working with the FE166ESR and the FE168E Sigma at the moment and will most likely decide between them for the final project. Note that I'm not trying to get any real bass out of them, just balance them out a little.

I'll post thoughts once I spend a little time with them. Thanks for your help.
Whatever the wattage the drivers can take, I would recommend using twice that rating. My gut feeling is use inductive. The different way non-inductive resistors are made may have adverse influence unless you know exactly how they are layed out internally.
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Old 24th February 2006, 12:24 PM   #7
sreten is online now sreten  United Kingdom
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Hi,

wire wound resistors can typically take 10 times their continuous
ratings short term, and have a much longer longer time constant
than bass unit voice coils.

With the sort of drivers you are using anything above 3W will be fine.

I'd use 5W for experimentation, and can be re-used for tweeters.

For final I'd use non-inductive.

/sreten.
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Old 24th February 2006, 01:29 PM   #8
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Thanks much folks, that realy helps. I did use stockers link and was getting different numbers, which I suppose may be accurate, though a bit confusing.

Appreciate it!
Layne
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