input for aleph-x

tze-hao yen · 21st February 2007, 05:14 AM

sorry to bother any body but i wonder if my aleph was loud enought so i want to know how much in put should it take ?
i had an pre amp that will give 8 volt out put and 16 volt balanced but i don't heared loud as i trun up the volumen i had an 30volt and 300millvolt on 0.47hom i have 24 fet any one?

h_a · 21st February 2007, 11:48 AM

Well it depends how much power your version of the AlephX has. I think the original schematic delivered 30 W, so with inefficient speakers it is maybe a bit low when you want to play really loud.

However I think 8 V are far too much input and drives the poweramp only into clipping since its rails are 15 V!

Cheers, Hannes

GRollins · 21st February 2007, 08:47 PM

Have you grounded the unused input? If you're using a single-ended input, that's good for 6dB right there.

Grey

tze-hao yen · 22nd February 2007, 12:38 AM

sorry about mistake what i was try to tell is my aleph was not loud it can not play very loud i want to know why ?and how much in put i need to make it maxinun out put ?

wuffwaff · 22nd February 2007, 04:03 PM

Hi,

the gain is 20dB so 1 volt input will give 10volts output.
For a 100 watt/8 ohm Aleph x this means around 2,8volts before clipping.

William

21st February 2007, 05:14 AM	#1
tze-hao yen diyAudio Member Join Date: Jul 2004 Location: brooklyn	input for aleph-x sorry to bother any body but i wonder if my aleph was loud enought so i want to know how much in put should it take ? i had an pre amp that will give 8 volt out put and 16 volt balanced but i don't heared loud as i trun up the volumen i had an 30volt and 300millvolt on 0.47hom i have 24 fet any one?

21st February 2007, 11:48 AM	#2
h_a diyAudio Member Join Date: Sep 2006 Location: Graz, Austria	Well it depends how much power your version of the AlephX has. I think the original schematic delivered 30 W, so with inefficient speakers it is maybe a bit low when you want to play really loud. However I think 8 V are far too much input and drives the poweramp only into clipping since its rails are 15 V! Cheers, Hannes __________________ fresh matched IRFP240/IRFP9240 fets \|\| AlephJ/JX-kits F5 transistor kits \|\| Burning Amp BA-1/2/3 transistor kits

22nd February 2007, 04:03 PM	#5
wuffwaff diyAudio Member Join Date: Aug 2001 Location: Ingolstadt Germany	Hi, the gain is 20dB so 1 volt input will give 10volts output. For a 100 watt/8 ohm Aleph x this means around 2,8volts before clipping. William __________________ een ooievaar is geen konijn want zijn oren zijn te klein!

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21st February 2007, 08:47 PM	#3
GRollins diyAudio Member Join Date: Feb 2001 Location: Columbia, SC	Have you grounded the unused input? If you're using a single-ended input, that's good for 6dB right there. Grey

22nd February 2007, 12:38 AM	#4
tze-hao yen diyAudio Member Join Date: Jul 2004 Location: brooklyn	sorry about mistake what i was try to tell is my aleph was not loud it can not play very loud i want to know why ?and how much in put i need to make it maxinun out put ?

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