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Old 6th July 2010, 04:10 PM   #1
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Default Aleph 4 - the right amp?

Does anyone have a view as to whether a production Aleph 4 is capable of driving a pair of speakers with a nominal impedance of 4 Ohms and a sensitivity of 92dB/W@1m?

My understanding is that the Aleph 4 does NOT increase power into lower impedances (though I'm not sure where I got this from).

I'd really appreciate your thoughts on this. Now just let me know.

Cheers,
Mani.
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Old 6th July 2010, 04:53 PM   #2
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say that yor Aleph 4 have at least 25% more power on 4 ohms than on 8

that's usual ratio for almost all Aleph amps

92db/w/m seems pretty adequate even for lesser Alephs , under condition that they have no wild impedance modul
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Old 6th July 2010, 08:50 PM   #3
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manisandher,
with low impedance speakers Aleph shows its ugly side (a CCS tricked into believing that he's a part of push-pull team).
And make sure not to take advice on this matter from people who own and listen to 16 Ohm speakers - not even if they have a monkey on the shoulder

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Old 6th July 2010, 09:02 PM   #4
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And make sure not to take advice on this matter from people who own and listen to 16 Ohm speakers - not even if they have a monkey on the shoulder
Is that what that is?
Maybe a BA2 or F5 would be better.
I am sure you could tweak the ccs in the aleph to better match 4ohm speakers though, but maybe it is not worth the effort.
As a suggestion I would aim for 24V to 30V rails and 4A bias current.

Last edited by Melon Head; 6th July 2010 at 09:17 PM.
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Old 6th July 2010, 10:04 PM   #5
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manisandher,
......- not even if they have a monkey on the shoulder
wrong ;

for all this years you didn't catch that I'm siting on her shoulder




mani - you know to judge by your own ears ;

nothing will be better than hear exact combo in your place
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Old 6th July 2010, 10:38 PM   #6
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wrong ;

for all this years you didn't catch that I'm siting on her shoulder

No, please don't do that - those pony tails are so you....

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mani - you know to judge by your own ears ;

nothing will be better than hear exact combo in your place
Abosolutely - making one's own judgment is the best solution
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Old 7th July 2010, 09:12 AM   #7
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The Aleph 5 does 90W into 4 ohms, AC gain is higher. You can also increase the AC gain in the Aleph 4 if you wish. Check out the spreadsheet for the X amps or the old Aleph spreadsheet if you can find it. I use a slightly tweaked Aleph J for my Seas Thors with fine results.
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Old 7th July 2010, 09:37 PM   #8
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Normally I would say no, but the 92 dB sensitivity may buy
you the margin you need.

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