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Old 3rd April 2002, 08:47 PM   #1
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Default small / downgrades Aleph for active speakers

Hi,

where to start ?

I have 4-way active speakers, and would like to build Alephs for them.

Aleph3 is the smallest one, right ?

8 x 100 W = 800 W = too much


The mini-Aleph may be is a little too small.

Can I downgrade the Aleph3 by reducing the rail voltage and what else ?

So that I get 15 W output and 50 W dissipation per channel, that is 400 W total and ok

My active filters are full of op-amps, do theese degrade the Aleph qualities ?


Bernhard
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Old 3rd April 2002, 09:46 PM   #2
lohk is offline lohk  Europe
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What about using the new Zen/Aleph ?
Is case you did not know: www.passdiy.com
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Old 3rd April 2002, 09:59 PM   #3
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Hmm, can not find it, what is the exact title ?

The new zen part 1 and 2 ?
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Old 3rd April 2002, 11:52 PM   #4
lohk is offline lohk  Europe
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Are you trying to fool me?
It's the " Zen Variations - Part 2 " of course.
Down on your knees, download the pdf and study it.

I think it will work with low output impedance crossovers. What type do you intend to use ? DIY ?
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Old 4th April 2002, 01:31 AM   #5
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Default Re: small / downgrades Aleph for active speakers

Quote:
Originally posted by Bernhard
Hi,

where to start ?

I have 4-way active speakers, and would like to build Alephs for them.

Aleph3 is the smallest one, right ?

8 x 100 W = 800 W = too much

The mini-Aleph may be is a little too small.

Can I downgrade the Aleph3 by reducing the rail voltage and what else ?

So that I get 15 W output and 50 W dissipation per channel, that is 400 W total and ok

My active filters are full of op-amps, do theese degrade the Aleph qualities ?


Bernhard
Aleph

Bernhard,

A30 is the smallest @ 30W per channel.

You might consider running the Mini Aleph in bridged configuration.... i'm not 100% if this will work but it should and it would give you the power you need.

As suggested above, Zen-Aleph is probably also worth considering as it outputs 35W but if you decide to go this path, i'd wait for the remaining 2 parts of this articles where the zen will gain a 47k input impedance and have it's upper frequency response refined.
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Old 4th April 2002, 09:41 AM   #6
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Audiofreak,

A30 is the smallest @ 30W per channel.

The Aleph3 is also 30 W per channel, is there any difference ?

Where can I find the A30 schematic ? It is not on passlabs.com.

Yes, I will wait for the zen-variations article to be complete.


Bernhard
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Old 4th April 2002, 09:57 AM   #7
Freddie is offline Freddie  Sweden
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Bernhard,

The Aleph 30 schematic can be found here:
www.volksamp.com

/Freddie
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Old 4th April 2002, 10:10 AM   #8
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Sorry Bernhard,

I mustn't have been thinking straight when i posted that earlier and i had it in my head that the Aleph 3 was bigger than 30W

As for the difference, the Volksamp A30 has a front end on it versus the Aleph 3 which is almost all just an output stage.
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Old 4th April 2002, 10:53 AM   #9
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I've built a downscaled prototype 'Aleph 30' with only one output device and it works fine.
Another great advantage is you don't need to match the output devices.
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Old 4th April 2002, 11:34 AM   #10
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Freddie,

thanks, got it.


leroy,

very interesting, what else did You change ?

Rail Voltage ? Resistors ?


Bernhard
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