Advanced Discussion - Burst Test/Power

Burst Test/Power

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Forum Name: Advanced Discussion
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URL: https://forum.speakerplans.com/forum_posts.asp?TID=103136
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Topic: Burst Test/Power

Posted By: djkeet
Subject: Burst Test/Power
Date Posted: 12 January 2019 at 7:54pm

If an amp gives 3500W per channel into 4ohm @40ms burst 1kHz sine wave,what wattage would the amp be delivering at 25-100HZ is there a formula,100 ways to skin a cat,guestimate,nothing or is it just scope thats gonna give this answer bearing in mind certain amp manufactures claim you cannot do measurements in the traditional way phew

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Replies:

Posted By: levyte357-
Date Posted: 12 January 2019 at 9:17pm

There is no formula, it all depends on manufacturer/build quality of unit.

The cream of the old transformer amps, had manly enough PSUs, and enough output devices, perform to spec down to 2 ohm stereo at 40hz.

My personal "formula" for I apply to ALL lightweights playing sub, is expect lightweight amp to provide MAX 66% of rated power on sub notes.

Which is why you need ridiculously rated lightweight power amps, to really power 4/6x subs on 1x lightweight amp.

Back in the days of transformer amps, how many people actually bought transformer amps rated at 10K?

That's because, those days quality amp rated at 1.8k - 2kw per channnel at 4 ohms, did what it aid on the tin, or more.

Where as today, MOST lightweight stereo amps rated 3-5kwpc at 4 ohms 1khz burst, actually provide approx 1.8-2.5kwpc @ 4 ohms @ 40hz, and hence easily matched by Void Infinite 8MK2.

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Posted By: djkeet
Date Posted: 12 January 2019 at 10:00pm

My personal "formula" for I apply to ALL lightweights playing sub, is expect lightweight amp to provide MAX 66% of rated power on sub notes.

Interesting points Levyte how did you arrive 66% and not 55% or 75% like you say dependent on manufacturer some could inflate the specs and some overbuild. There is a supposed small % difference for void @ 1kHZ and 40HZ prob 20/30W with above formula for light weights your talking 1000W difference between 1Khz and 40HZ

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