How does box rise work?

[Flex68 10+ year member]

Ok, I'm glad you clarified. Your posts prove that you know nothing. The clamp results need voltage and current. You assume you can just look at the peak current and know something. You can't. That doesn't make sense. Nobody would know you aren't smart if you'd stop talking so much.

Jaysus, you're an idiot..... so ur insinuating that someone should clamp to find the lowest current so they can adjust/account for minimum or negative box rise?

Please.

Using the "Range" and "Hold" functions on the clamp meter will tell 95% of folks what they wish to know using with their standard music selection/preference playing, since surely most are looking for nominal - to - max box rise.

I am not the one who needs to stop talking, here, poodlenutz, lol

 

[LBC]

Jaysus, you're an idiot..... so ur insinuating that someone should clamp to find the lowest current so they can adjust/account for minimum or negative box rise?
Please.

Using the "Range" and "Hold" functions on the clamp meter will tell 95% of folks what they wish to know using with their standard music selection/preference playing, since surely most are looking for nominal - to - max box rise.

I am not the one who needs to stop talking, here, poodlenutz, lol

You missed the point genius. What do you multiply that number with? At this point everyone realizes that you need the current AND the voltage. You are explaining how to find the maximum current the amp puts out over a specific period of time. How would a person get a relevant voltage to plug into the calculation? This is why you should stop talking. It doesn't matter what you say here.... it will prove that you have NO CLUE what you're talking about.

 

[Flex68 10+ year member]

I'm done with ya, you braindead, non-reading schmuck

 

[LBC]

I'm done with ya, you braindead, non-reading schmuck

AKA you realized you have no idea what you're talking about, decided to throw a few putdowns and exit before you do any more harm to your already tarnished name. Awesome idea bro.

 

[THATpurpleKUSH 5,000+ posts]

Flex- I know you're not an idiot and I get what you're trying to say but I'm gonna have to side with lbc on this. Music has a range of different freqs and rise will be different at every note and because of that the only true way to know how much rise you are incurring is to clamp a variety of single note tones and then graph the results.

 

[Flex68 10+ year member]

Flex- I know you're not an idiot and I get what you're trying to say but I'm gonna have to side with lbc on this. Music has a range of different freqs and rise will be different at every note and because of that the only true way to know how much rise you are incurring is to clamp a variety of single note tones and then graph the results.

Thank you.

That is cool, but anyone who wants to obtain basic ranges or a "peak" box rise is going to be able to do that via the method I posted.

Def going to work for most daily drivers....In fact, for those seeking a basic idea of how much box rise they have, I don't know any other way to go about obtaining such info.

Folks in SPL comp's are likely going to go deeeeeper, but such likely doesn't apply to the original question OP posted, and thus the "caveat" that I put in my second post in response to yours.

Regardless, I still say that LBC never even bothered to read my two posts in their entirety before attempting to "rebut."

Don't expect much more from his ilk, anyway......

Its all good

 

[Kangaroux 5,000+ posts]

Holy butthurt batman.

 

[n8skow 10+ year member]

You can't calculate impedance rise by reading AC voltage alone, (see Ohm's law). You would also need an ammeter to clamp the AC amperage (Voltage divided by Amperage = impedance), and both numbers vary greatly throughout the musical spectrum (and is influenced by your enclosure design, as well as the driver parameters).

Peak hold will be worthless while playing music because you wouldn't be measuring peak voltage and peak amperage at the same time. You would either need to take measurements one frequency at a time, or use a device capable of plotting both measurements simultaneously (as far as music is concerned).

 

[LBC]

You can't calculate impedance rise by reading AC voltage alone, (see Ohm's law). You would also need an ammeter to clamp the AC amperage (Voltage divided by Amperage = impedance), and both numbers vary greatly throughout the musical spectrum (and is influenced by your enclosure design, as well as the driver parameters).
Peak hold will be worthless while playing music because you wouldn't be measuring peak voltage and peak amperage at the same time. You would either need to take measurements one frequency at a time, or use a device capable of plotting both measurements simultaneously (as far as music is concerned).

Exactly. It's good to know there are others on here who understand.

 

[quackhead 10+ year member]

UniBox - Unified Box Model for Loudspeaker Design - Kristian Ougaard

 

[shpatb 10+ year member]

Thanks guys, for the information and entertainment.

 

[n8skow 10+ year member]

The bottom line is - don't treat impedance rise as a 'bad' thing, it's simply a function of physics.

All setups are going to have some rise, learning to manipulate it, that is the trick.

 

[wenn_du_weinst 10+ year member]

not reading,

boxes lower impedence not make it rise.

you need impedence rise to play music, with out it you would only do burps