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First One - mosFET amplifier module

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N

nanakos

Member
Joined 2017
Fake or bad caps....
I bought 8 pieces ELNA FOR AUDIO 10000uf 63v from AUDIOPHONICS to use them in my FO and the measurements showed about 8400 uf.After sales services told me that tolerance is 20% so these caps are OK.But i have never seen in my life before branded product such as ELNA for audio to have such low measurements.They usually have at least 5-10 percent more.I have 7pcs 10 yo ELNA caps and they have 11000uf or more. I am very disappointed and of course I will not use them.Of course they refused my review that's why I'm publishing it here.
 
Lazy Cat

Lazy Cat

Member
Joined 2007
New FO modules to be launched in 2018

FO modules v1.6 in final phase of preparation, schematic locked, measurements done. PCB layout on my LCD screen so it looks we could still manage them to be dated with 2018 mark.

FO module v1.6 is unconditionally stable and has been thoroughly sound tested at each step of development with two slightly different amplifiers, one having previous - another current variant, so always better sample proceeded to the next level. Time consuming process gave amazing result, we think. Stay tuned.

Pic showing 500 kHz square wave signal at 20 Vpp on 8 Ohm load.
 

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Lazy Cat

Lazy Cat

Member
Joined 2007
All measurements and listening sessions done with large modules. No worries, medium will share same topology only one pair of output mosfets. Experienced tons of amps in our system, all kind of brands and profiles, without any doubt or exaggeration I can say FO will be fearless giant killer.
 
R

RobSoet

Member
Joined 2014
Interested... still have to built my L project but wouldn't mind sizing down... .


Any ideas on price setting for the new modules?
And, LC, somewhere you mentioned you where considering encapsulating the modules in resin... . will you stick to that plan?


And while we're at it... I'd be interested in your experiences with the metrum Pavanne compared to the other dacs your using... .


Cheers,



Rob
 
Lazy Cat

Lazy Cat

Member
Joined 2007
RobSoet said:
Interested... still have to built my L project but wouldn't mind sizing down... .
Click to expand...

Don't need to, First One L will be produced too.


RobSoet said:
Any ideas on price setting for the new modules?
Click to expand...

Same price range as they were, so prices set in the first post of this theme are valid.


RobSoet said:
And, LC, somewhere you mentioned you where considering encapsulating the modules in resin... . will you stick to that plan?
Click to expand...

Most probably only parts of it, not complete module.


RobSoet said:
And while we're at it... I'd be interested in your experiences with the metrum Pavanne compared to the other dacs your using... .

Cheers,

Rob
Click to expand...

We use Adagio by Metrum, of course slightly modified, in our main system. I like it is true dual mono DAC, L/R channel's GND are isolated. S/N ratio, feed-forward correction and dynamics are state of the art.

Cheers
 
Lazy Cat

Lazy Cat

Member
Joined 2007
Entry level First One module, which is the smallest in the new modules family, has size 80 x 50 mm and could be powered with variety of PSU voltages, meaning power ratings from 50 to 150 W on 8 ohm speakers. Less power is to my opinion reserved for chip amps, therefore no interest of mine. I'm sure you'll be enthusiastic using our smallest module which will find place in many active powered speakers and multi-channel home theater power amps.
 
S

syracuze

Member
Joined 2018
v1.6 modules

What is the timeline for the new v1.6 modules availability?


Also, Metrum Adagio is under quite a competition over there. Care to share the differences between Adagio and MSB Select/Reference products you have over there?



Lazy Cat said:
In 2018 we had a lot of supporting equipment for our R&D purposes like Grande Utopia Focal loudspeakers, Select and Reference MSB DAC, Adagio Metrum DAC, Siegfried Reference monoblock and preamplifier VTL, Reference 10 preamplifier Audio Research and many many more. The aim of having them for comparisons was to be at least on the same SQ level like the ones mentioned.
Click to expand...
 
Lazy Cat

Lazy Cat

Member
Joined 2007
Over the weekend we had official launch accompanied with presentation of our new First One 600 power amplifier based on v1.6 modules. 8 power devices per channel generously gives 600 W on 4 Ohm load, easly 1200 W on 2 Ohm. The sound through Mini One speakers was appealing, detailed, realistic attributes kind, we enjoyed together with lots of visitors.
 

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S

syracuze

Member
Joined 2018
Wow! Looks very cool with the Faraday cage for power supply. Would love to see more pictures of the amp.

Btw, what is the power dissipation of new v1.6 modules with 8 devices? You have some big heatsinks.

Lazy Cat said:
Over the weekend we had official launch accompanied with presentation of our new First One 600 power amplifier based on v1.6 modules. 8 power devices per channel generously gives 600 W on 4 Ohm load, easly 1200 W on 2 Ohm. The sound through Mini One speakers was appealing, detailed, realistic attributes kind, we enjoyed together with lots of visitors.
Click to expand...
 
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