burst /power |
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gen0me
Young Croc Joined: 20 February 2016 Location: UK Status: Offline Points: 999 |
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Posted: 07 July 2017 at 5:18pm |
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Infinite 7.
What is the thd on this test for k10? It changes during test? As power changes? Edited by gen0me - 07 July 2017 at 5:21pm |
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toastyghost
The 10,000 Points Club Joined: 09 January 2007 Location: Manchester Status: Offline Points: 10920 |
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That's not an Infinite 8v2… |
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gen0me
Young Croc Joined: 20 February 2016 Location: UK Status: Offline Points: 999 |
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I meant 40hz
This powersoft isnt just a burst either.. Edited by gen0me - 07 July 2017 at 3:45pm |
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gen0me
Young Croc Joined: 20 February 2016 Location: UK Status: Offline Points: 999 |
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You mean its number of transistors? Some tests are quite tempting on its brother 1) how does abeltronics test them? Create sinus 50hz for 100ms plays on the level of clip and measure voltage on dummy load? Got from it both thd and power. 2)Limiter in void will not allow me to measure on such strong burst like k10? It could be good for thd though. |
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toastyghost
The 10,000 Points Club Joined: 09 January 2007 Location: Manchester Status: Offline Points: 10920 |
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You might find that if you run an Infinite 8v2 that hard at 2 ohm loads, eventually channel 2 will need repair...
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gen0me
Young Croc Joined: 20 February 2016 Location: UK Status: Offline Points: 999 |
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Those void measurements are continuous measurements. So on this k10 chart they would be just straight line exept the 2R burst for 0.1s (4158w) that later should fall to 3112)
Regret there is no thd for this burst 100ms for void. Hmm Why powersoft has 7500W on burst 100ms falling to 1200W and infinite 4158 falling to 3112. Its a HUGE unproportion.
I meant when hes getting out of steam Edited by gen0me - 07 July 2017 at 1:30pm |
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djkeet
Registered User Joined: 26 December 2011 Location: England Status: Offline Points: 462 |
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Very true Abletronics were about 100ms in some cases and ive seen 33 and 66 and as low as 5 and 12 also to be included which as been mentioned already is the freq at which the signal is delivered in an attempt to determine a power supply's strength and weaknesses. The difference comes in what are manufactures burst signals made of that's how it appears to me that they need to come together and decide on real world comparators to use, as oppose to the EIA standard 40ms burst @ 1khz Edited by djkeet - 07 July 2017 at 4:08pm |
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snowflake
Old Croc Joined: 29 December 2004 Location: Bristol Status: Offline Points: 3118 |
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all measurements are burst measurements - just some people's bursts are longer than others
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djkeet
Registered User Joined: 26 December 2011 Location: England Status: Offline Points: 462 |
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[QUOTE=gen0me] Hmm any estimate how much will have for example infinite 8 in burst?
https://www.abeltronics.co.uk/amptesting.php?z=Void_Infinite_8_mk2 Infinite 8 appears to behave well under burst testing conditions but Toastyghost hits the nail on the head with his analysis of the K20. What makes them different to the toroidal is the pfc (Power factor correction)where in a nut shell the amp will deliver its wattage regardless of voltage fluctuation which most know anyway.I own smp amps But do they deliver what it says on the can its close but NO it reminds me of the new washing machine it says it can spin at 1400rpm it can with two panty and pair of socks, once we start loading it up we have to change the settings so its considerably slower. Edited by djkeet - 07 July 2017 at 5:01am |
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toastyghost
The 10,000 Points Club Joined: 09 January 2007 Location: Manchester Status: Offline Points: 10920 |
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The limiter starts working wherever you program it to? It will depend on your driver and cabinet combination - and how well/true the manufacturer is at providing ratings for those. For example a TH118 can handle 160v RMS.
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gen0me
Young Croc Joined: 20 February 2016 Location: UK Status: Offline Points: 999 |
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Weak in comparison to amount of transistors. Old toroid vs new powersoft.
Can you give some examples of music material where limiter starts working? |
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toastyghost
The 10,000 Points Club Joined: 09 January 2007 Location: Manchester Status: Offline Points: 10920 |
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Define 'weak' - it takes well under half a second to fully recharge the caps in a K series. 1 second of above rated power at 2 ohms is enough for the vast majority of even bass heavy material - remember that most tunes don't sustain a single note at full power for more than that. We work with a whole bunch of stuff that tests the boundaries of what could be called 'music' and even then, don't find it lacking. We tend to run our K20s at 4r per channel, simply to give that 10s spread. A reduction of ~18% is perfectly acceptable at 10 second sine wave duration. Edited by toastyghost - 07 July 2017 at 12:45am |
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