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Old 26th September 2003, 05:35 PM   #1
Apogee is offline Apogee  United States
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Question Aleph 1.2 vs Aleph 2?

I know there has been lots of discussion on the various Alephs.

Here's my dilemma:

I was planning on building a pair of 1.2's. I already have the metal and most of the parts for the project. But, now I'm wondering if it wouldn't make more sense to build an Aleph 2 in the same chassis using a large transformer, possibly additional fets and really crank the bias since the chassis will be able to dissipate much more heat than a standard Aleph 2 chassis...

I've read repeatedly that higher bias sounds better. The question that comes to mind - is there a point of diminishing return?

Which is better, high output wattage or much higher bias?

Opinions?

The load will be a pair of Apogees...

Thanks,
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Old 26th September 2003, 06:57 PM   #2
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If u intend to drive Diva's in high spl's in a larger than average listening room, I think u need 4 Aleph 1.2's.

If it's about Scintilla's, Lord knows.

And if you have Duetta's, I think 4 Aleph 2's can do the job.

Good luck,

Nick
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Old 26th September 2003, 07:59 PM   #3
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Default Apogee and Aleph's

You need the current for youíre the Apogee speakers. I use to own a pair of one ohm Scintilla's, that speaker would eat the output of my Threshold amps, so I got a Krell it had more current capability, which worked fine with that load.

Therefore, I would go with the amp that has the most current capability and that is the Aleph 1.2. Having said that, I believe if you lower the source resistors to 1 ohm instead 1.5 that would lower the output impedance of the amp making it an easer to drive the load. Also, should consider look at lowering the value of all those .47 ohm output resistors that are in series with the speakers. Making these changes might help am Aleph 2 work with the Apogee speakers. Of course this all depend on which Apogee speakers you have, they all like high current amps.

So my Aleph build is in the same state as yours, however I no longer have my Apogee speakers.

Maybe Nelson might respond to the changes in the output stage
of the Aleph.
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Old 26th September 2003, 08:07 PM   #4
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Default Re: Aleph 1.2 vs Aleph 2?

Quote:
Originally posted by Apogee
Which is better, high output wattage or much higher bias?
Higher bias. I would use the number of transistors found in the
Aleph 2 with the heat sinks and bias wattage of the 1.2
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Old 26th September 2003, 08:25 PM   #5
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Question Re: Re: Aleph 1.2 vs Aleph 2?

Quote:
Originally posted by Nelson Pass

Higher bias. I would use the number of transistors found in the
Aleph 2 with the heat sinks and bias wattage of the 1.2

Say........ Just how many shares do you have of International Rectifier?

With all respect,

Fred
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