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Old 9th February 2013, 11:56 PM   #1621
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I'm sure it's very fine.
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Old 12th February 2013, 02:30 PM   #1622
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Are there any other suggestions for operating point for 8ohm load other than below?

Juanitox wrote:
"1.6amp 19V with inductor
or at 14V 2.4amp with res load"

Michael Rothacher wrote:
"19-20V across the SIT @ 1.55-1.6A " - IXTH6N50D2 Constant Current Source

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Old 12th February 2013, 06:30 PM   #1623
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i have made some test with a 10ohm reosthat bypassed with a 47000uf
and looking at the loadline it's difficult to find a bad operating points .. or the best one if you don't have a distorsion analyzer .. at this time i run mine at 16V 2.13A with a 1.8R source resistance and 47000uf bypass.
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Old 26th February 2013, 07:34 PM   #1624
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Is there a simple diy preamplifier that could drive the L'Amp?
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Old 26th February 2013, 08:41 PM   #1625
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BOZ-J drives my SIT-CCS L'amp. Mike Rothacher is coming out with a companion preamp for the L'amp, but that preamp might be a few months out.
See his site for more info.
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Last edited by vdi_nenna; 26th February 2013 at 08:44 PM.
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Old 27th February 2013, 02:12 PM   #1626
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I'll look into that. Thank you
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Old 27th February 2013, 03:02 PM   #1627
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Cool Pre-amp for LĀmp...

Hi Bluewater!

I run mine LĀmp with the Passive B1 - and now that my Alp12P is finished - the soundpressure and revelation from the sources is magnificent. Really enough for my 35sq-meter room.

Best

Olav
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Old 27th February 2013, 04:59 PM   #1628
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Hi Olav,
I do have the B1 but I unfortunately only a 2v source. I do plan on bi-amping my BassZillas with two paralleled B1's. With little gain from L'Amp I think it would be good to give the source output a boost.

Eric
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Old 27th February 2013, 07:29 PM   #1629
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Default Hi Eric

Earlier I used my B1 with the LĀmp - and the Alp10.2(which is about 89 db). The source was then the DirectDac(SC4398) which gives about 1,75 volt output!
on some recordings it could be somewhat low output - but mostly very good. Today I have the Alp12P - and I have installed Sowthers on the balanced output on the Dac(so it should give approximately 2,5 Volt output). The same configuration on the LĀmp and....
So today it very good and strong output!

Best

Olav
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Old 27th February 2013, 11:27 PM   #1630
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Hi Olav,
I'll definitely give it a try with the B1 alone. I've just about collected all the parts for my L'Amp. I'm going almost exactly by Michaels Inductor version. I'm only waiting for Antek to make the AS-4428 available. They said some time in mid April.
Eric

Last edited by bluewater; 27th February 2013 at 11:52 PM.
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