Any connection between Aleph dynamics and transformer!

bbakota2000 · 14th April 2005, 11:43 AM

Is there any connection between sound (especially dynamics) and the transformer rating?
I'm asking this because I have two 300VA toroids per channel in my Aleph 5, and now I have some extra cash so I thought it would be good to make my Aleph better.
What can I expect from 500VA per channel?

Netlist · 14th April 2005, 07:14 PM

Because current in class A amps is constant and the 300VA’s seems to be able to do the job, you will gain nothing with replacing them with 500VA’s.

/Hugo

bbakota2000 · 14th April 2005, 07:48 PM

Thanks. I thought so, but I wasn't sure after I red Nelson's "Power supply" paper!

Blues · 14th April 2005, 08:51 PM

I believe it will help any Aleph. The Aleph's current source, besides a 0% ACIG setting, will try to deliver more current in lower impedances in Class AB. Having a transformer only able to deliver an Aleph's rated Class A power will be strained in my opinion and might sound hard depending on your speakers' impedance variations. The feedback on the Aleph current source sets the current sharing in the +/- signal and also allows the Aleph to deliver Class AB power beyond its Class A DC bias.

wuffwaff · 14th April 2005, 09:02 PM

Hi,

up until 50% ac current gain the mean power taken from the power supply will be the same all the time regardless of signal.

This doesn´t mean that other transformers will sound the same as they also function as mains filters, sources for magnetic fields etc. etc.

I think the power supply caps are (generally speaking) more important for dynamics cause they have to deliver the short peaks needed. So before you invest in bigger trannies you could try more caps......

William

Nelson Pass · 14th April 2005, 09:38 PM

I think it's a question of diminishing returns. A constant average
draw design like the Aleph is less sensitive to transformer
rating once the minimum requirement is met, but we still like
them bigger, don't we...

mastertech · 14th April 2005, 10:13 PM

Netlist []
Poseidon's Horse
diyAudio Moderator

Offline
Registered: Jan 2003
Location: Belgium

Post #2
Because current in class A amps is constant and the 300VA’s seems to be able to do the job, you will gain nothing with replacing them with 500VA’s.

-------------------------------------------
you does gain more reliability and easthetic appeal arent you
guys do the same thing to look like those professionals making
high-end stuff, and dont forget the other stuff like overrated heatsinks and gold plated stuff etc

14th April 2005, 11:43 AM	#1
bbakota2000 diyAudio Member Join Date: Jan 2004 Location: Croatia	Any connection between Aleph dynamics and transformer! Is there any connection between sound (especially dynamics) and the transformer rating? I'm asking this because I have two 300VA toroids per channel in my Aleph 5, and now I have some extra cash so I thought it would be good to make my Aleph better. What can I expect from 500VA per channel?

14th April 2005, 09:02 PM	#5
wuffwaff diyAudio Member Join Date: Aug 2001 Location: Ingolstadt Germany	Hi, up until 50% ac current gain the mean power taken from the power supply will be the same all the time regardless of signal. This doesn´t mean that other transformers will sound the same as they also function as mains filters, sources for magnetic fields etc. etc. I think the power supply caps are (generally speaking) more important for dynamics cause they have to deliver the short peaks needed. So before you invest in bigger trannies you could try more caps...... William __________________ een ooievaar is geen konijn want zijn oren zijn te klein!

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14th April 2005, 07:14 PM	#2
Netlist diyAudio Moderator Join Date: Jan 2003	Because current in class A amps is constant and the 300VA’s seems to be able to do the job, you will gain nothing with replacing them with 500VA’s. /Hugo

14th April 2005, 07:48 PM	#3
bbakota2000 diyAudio Member Join Date: Jan 2004 Location: Croatia	Thanks. I thought so, but I wasn't sure after I red Nelson's "Power supply" paper!

14th April 2005, 08:51 PM	#4
Blues Lightning In A Bottle diyAudio Member Join Date: Sep 2003 Location: Bremerton, WA	I believe it will help any Aleph. The Aleph's current source, besides a 0% ACIG setting, will try to deliver more current in lower impedances in Class AB. Having a transformer only able to deliver an Aleph's rated Class A power will be strained in my opinion and might sound hard depending on your speakers' impedance variations. The feedback on the Aleph current source sets the current sharing in the +/- signal and also allows the Aleph to deliver Class AB power beyond its Class A DC bias.

14th April 2005, 09:38 PM	#6
Nelson Pass The one and only Join Date: Mar 2001	I think it's a question of diminishing returns. A constant average draw design like the Aleph is less sensitive to transformer rating once the minimum requirement is met, but we still like them bigger, don't we...

14th April 2005, 10:13 PM	#7
mastertech Banned Join Date: Mar 2005 Location: Australia	Netlist [] Poseidon's Horse diyAudio Moderator Offline Registered: Jan 2003 Location: Belgium Post #2 Because current in class A amps is constant and the 300VA’s seems to be able to do the job, you will gain nothing with replacing them with 500VA’s. ------------------------------------------- you does gain more reliability and easthetic appeal arent you guys do the same thing to look like those professionals making high-end stuff, and dont forget the other stuff like overrated heatsinks and gold plated stuff etc

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