Loudspeaker Design
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well 50v is 141.5 watts, 159v is 449 watts and that's the watt rating of the driver. All i'm saying is I wish the driver was safe within that extra 100v range.Gregory East wrote:Is that 450W per cab you're meaning? What's the problem?
I think your math might be a little off.Dan30 wrote: well 50v is 141.5 watts, 159v is 449 watts and that's the watt rating of the driver. All i'm saying is I wish the driver was safe within that extra 100v range.
I get you, squashed/limited signal is not what I desire. But wouldn't that be the situation only if you had some serious gain staging AND full throttle on the amp, if you dial the signal with the gain/master on the mixer you won't have to push the limiter too hard?Gregory East wrote:All things being equal the RMS power delivered in a signal is independent of the frequency. It is determined by the load and applied voltage.
Your crossover must be affecting things.
You need to understand system gain structure. There will be a link in the education section for you. Cooks version: Every unit in the signal chain has a minimum and maximum gain setting, in and out, for an acceptable noise and distortion level in realtion to the actual signal you want to hear. In the extreme, say you have a "gigawatt" amp, and limit it to -30dB, as soon as you turn on the mixer you get a bit of hum and no music at all! That's what you are up against, to a lesser degree, if your amp is way too powerful.osse wrote:I did some testing today, and I get different voltage measurements depending which frequency sine I choose.
I'm using a DRPA+, isn't this a good unit for this purpose? I mean, with my peavey PV3800 amp the voltage swing is very unpredictable, it seem you can't "set and forget" the limiter as it depens on frequency... Everytime I accidently feed the 3012lf with more than 50 volts it feels like i've just killed someone..
I'm feeding the DRPA from the computer, amp on full throttle. is this right way?
Also, I can't really understand the concept with a too high power amp being bad in the situation. For example:
high power amp on full throttle, feed with sine wave and limit at 50v, then set a good relationship between tops and subs and remote the limiter with the gains on the mixer. why would this result in squashing? as long as you keep an eye on the limiter I can't see whats bad with high headroom on amp?
What concerns me the most is that I can't find any good settings for a reliable limiter on the subs.
But the T30 is really bad-ass..
Only so much can be put into the plans. OTOH there's this:osse wrote:How come no info is included in the plans on how to set the limiter correctly? Or am I missing the point somewhere? I'm sorry for being noob if that's the case..
Oh that makes a lot more sense. I thought 1w = 2.83v.CoronaOperator wrote:I think your math might be a little off.Dan30 wrote: well 50v is 141.5 watts, 159v is 449 watts and that's the watt rating of the driver. All i'm saying is I wish the driver was safe within that extra 100v range.
Watts = Volts squared/impedance
50*50/8 = 312.5 watts
159 * 159/8 = 3160 watts
I need to do some more reading but i'm on the right track now.Gregory East wrote:1W is made by 2.83V at 8 ohms.... bada-ching! Back to school for ye!
Do your voltage readings with the speakers disconnected from the amp!osse wrote:I did some testing today,... Everytime I accidently feed the 3012lf with more than 50 volts it feels like i've just killed someone..
See this thread for some voltage indexes: http://billfitzmaurice.info/forum/viewt ... =7&t=16062Dan30 wrote:I need to do some more reading but i'm on the right track now.Gregory East wrote:1W is made by 2.83V at 8 ohms.... bada-ching! Back to school for ye!
Better yet, just use this...Jon Barnhardt wrote:See this thread for some voltage indexes: http://billfitzmaurice.info/forum/viewt ... =7&t=16062Dan30 wrote:I need to do some more reading but i'm on the right track now.Gregory East wrote:1W is made by 2.83V at 8 ohms.... bada-ching! Back to school for ye!
