First One - mosFET amplifier module

[syracuze]

The presentation is very different to anything FW. These amps can work well with a much wider variety of speakers than FW, but electrostats... dunno, would be a bit apprehensive of fireworks. Unless someone has actual experience of such a marriage.

I am also very interested in differences between First Watt and First one models.
Analog_sa, would be much appreciated if you could share more on your experience

 

[Lazy Cat]

First One amplifier tested few times on Martin Logan Prodigy speaker, last test two weeks ago, one test also few years ago. No problem at all, moderately simple speaker to drive, from DC up to 5 kHz impedance no less than 4 Ohm, from 5 to 20 kHz linear drop (capacitive impedance of the panel) from 6 Ohm down to 1,5 Ohm. Owner said the First One has more 'juice' and definition on bass than MC2 S1400 power amp, and as 'airy' as tube amp. In short

 

[Lazy Cat]

Quick calculation shows Martin Logan Prodigy has app. 5 uF capacitance on the panel, so can cause some amps to ring on transients or even oscillate, sibilants would be harsh and distorted. Heatsinks would become hot in such case, but none of this happened with First One.

 

[Lazy Cat]

First One prototype built in 2016, upgrades performed till the end of 2017. Took few images before it left the building and went to a new home in Hungary. It serves us well, enabling us learning process and progress all the way the end of 2018 when new modules go into production. Yes, tomorrow few hundred PCB-s will start new life cycle. Thanks to the amp bellow.

First One power amplifier, preamp DAC & MAAT loudspeakers

 

[fredlock]

So, when are you planning to start selling the amp modules? And how much does it cost?

 

[Lazy Cat]

PCB-s in a week or two, SMD assembly in Jan 2019. It will be in the same price range as described in post #1.

 

[fredlock]

Thanks for the update. What will be the components for the PCB only option? is it SMD also? How much is the cost of the PCB?

 

[fresher]

@fredlock


as i know you can only buy the complete pcb with solder parts. Only pcb is not available

 

[Bassivus]

@fredlock


as i know you can only buy the complete pcb with solder parts. Only pcb is not available

Thats right. LC announced new modules will be even partially dipped in epoxy...

Thanks for the update. What will be the components for the PCB only option? is it SMD also? How much is the cost of the PCB?

Don't get me wrong, but you should do some reading across the thread...

 

[fredlock]

Thanks Fresher for enlightening me. I thought LC will start selling PCB. It was a long day yesterday, tired and my brain not functioning well.

Oh well, we'll just wait till it shows up.

 

[Inproof]

Any news ?

 

[Lazy Cat]

 

[Erlend Sæterdal]

We are waiting for the last One.

 

[Lazy Cat]

1000 PCB-s already here, waiting to get MELF-s and then production.

 

[taccodude]

Sooo,when can we order????

 

[Lazy Cat]

MELF resistors are a little bit tricky to get, but would be a shame not to have them on board. No pre-orders accepted until modules are finished and ready to ship.

 

[Lazy Cat]

Anybody noticed our new Ubiquitous three-way loudspeaker?

 

[Inproof]

I have. Elipticor... beter than the satory ? Why not go with the 15wu ?
Or maybe something more suitable for that mundorf AMT ? BMS 6s117 ?

 

[Lazy Cat]

Yes, far better than the named ones. DC coupled speaker, very realistic sound.

 

[Tournesol]

MELF resistors are a little bit tricky to get,

Most End up Lying on the Floor

;-)

Happy new year L.C.