First One - mosFET amplifier module

[Inproof]

I would be more happy to have those modules and have safe replacements than to sell them...
But it is how it is...


Can someone recommend a good preamp for them ? Not analog ones. Have to have the ability to amplify the input signal.

 

[dd16]

My FO has good sound with ak4497 and opa1611. For 200 € you probably won't do any better.

 

[J.M.K]

Topping dac & preamps

I would be more happy to have those modules and have safe replacements than to sell them...
But it is how it is...


Can someone recommend a good preamp for them ? Not analog ones. Have to have the ability to amplify the input signal.

Have a look at Topping dac & preamps - excellent.
Some of them have remote control & headphone output.

JMK

 

[Erlend Sæterdal]

Anybody still have moduls to sell?

 

[Vunce]

I still have a pair of unused FO V1.4M modules.
PM me if interested.
Thanks

 

[stretchneck]

Anyone got 6-8 modules I can buy medium or large. Shame we don’t have schematics and permission to do a new group buy

 

[Bassivus]

Anyone got 6-8 modules I can buy medium or large. Shame we don’t have schematics and permission to do a new group buy

Have you done some thread reading research? Sure you will not find the schematic but it could help you with your decision...

 

[stretchneck]

Have you done some thread reading research? Sure you will not find the schematic but it could help you with your decision...

Hi Bassivus - just trying my luck! Inproof managed to get 6 modules. There's obviously still demand there. Was there any reason given for ceasing production?

 

[Erlend Sæterdal]

I still have a pair of unused FO V1.4M modules.
PM me if interested.
Thanks

I bought theese if anybody wonder.

 

[felixx]

I have a pair of FO V1.4 L modules, never use it, for sale.
If anyone interested send me a message....

 

[Studley]

I have a working L module for sale. I also have a non working one !

I also have 2 stuffed power banks.

 

[Studley]

What do people think is a fair price for a working L module? ( I can’t even remember what I paid for it.)

 

[bondar100]

Alone, one single module require a big cooler ( 0.5°C/W).

Does anyone know what should be the temperature resistance of the radiator in a large module? What is the idle current of the power supply?

 

[Tournesol]

Double the dissipated power ?
The ideal quiescent current of each die in a lateral mosfet is around 125mA, where they are thermally neutral. Take into account double dies and total number of them. (8 for a L module ?)

 

[bondar100]

Thank you so much! I guessed about it, but was not sure. Each L module has 4 mosfets. I need a huge heatsink 0,25 K/W. It looks overkill.

 

[Erlend Sæterdal]

Double the dissipated power ?
The ideal quiescent current of each die in a lateral mosfet is around 125mA, where they are thermally neutral. Take into account double dies and total number of them. (8 for a L module ?)

In each Die? So you mean 250 ma I'll n a Double Die? I think 110.ma will do it in a Double Die. 250 is way to much if voltage is 90 v.

 

[The Saint]

Holton Ex Nihilo - Power Mono Block's – Holton Precision Audio

60K$ per pair and 94kg x 2 shipping weight

The price for the Ex Nihilo Mono Blocks is $30K for a pair and the cost includes free shipping worldwide.
There is currrently a pair of them on Stereonet second hand for $15k.

 

[stretchneck]

Where can I get one of the nice chassis from? Like this?

An externally hosted image should be here but it was not working when we last tested it.

 

[fredlock]

Hi Tournesol, what happen to Pizzicato thread? If that amp will really work great, that will be the way to go and everybody can DIY it. If there's a 100 watt version it will be more better.

It seems like we're not gonna get new First One modules anymore. Lazy Cat design/amp probably been bought by a Company that make amps and now they own the rights (just my assumption), so he can no longer sell the modules here. But he could have said something to let us know, so everybody can move on.

 

[Tournesol]

Hi Tournesol, what happen to Pizzicato thread?

WE reap what we sow.
For the moment, I don't want to participate at this forum any more (and its rules don't allow-me to explain why).