FM Acoustics 711 schematic

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#127
mV is indicated on the board, I measured it there
 

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#129
dht 4 me said:
I have bought several of the FM clones over the course of the last 6 yrs. After the first purchase I was very impressed, especially for the cost.
I did a ton of research on the Chinese language sites as well as Baidu. For starters it should be understood that all the items on Aliexpress or Baidu are NOT all the same. There are several small shops making clones and some are somewhat "Boutique" if there is such a thing in China, and some just make poor quality look alikes.
What I did find is that the FM modules have proven difficult to replicate, however the module in the entry level Preamp FM155 was cracked with great success and that was my first purchase which unfortunately skewed my perception of the quality of China gear. Several Baidu sits recently claim they have cracked the latest 19200 HR modules as earlier ones had some noise when SE outs were used.

Most of the gear is single ended with the modules being Balanced to SE converters that have good rejection. The amps are not bridged and use a SE signal.
There is a "House" sound to FM gear that is spacious and gives outstanding vocal reproduction. I have heard better low bass and slam but the midrange is really special.
I did find a shop based in Beijing ( Oak Leaf )that makes very good units but they are expensive and bought a 222MK2 Phono stage from them.

The 711 schematic has a special high breakdown diode that gets subbed for a regular diode and that is the only thing I can find in good power amp clones other than matching of transistors and their branded power transistors. They also use 2 bridge rectifiers which gives lower forward resistance and is a ground loop breaker.
The PCB's have been cloned for identical layouts as well.
The FM amps are quasi complimentary like the Phase Linear and JLH amp so they do not use complimentary NPN / PNP outputs.

FWIW I sold my Levinson ML333 and kept the FM711 clone.
Click to expand...
Hi,
Please I’m interested to buy a module FM 19202 cracked , Can you tell me where I can buy it? Thanks
dht 4 me said:
I have bought several of the FM clones over the course of the last 6 yrs. After the first purchase I was very impressed, especially for the cost.
I did a ton of research on the Chinese language sites as well as Baidu. For starters it should be understood that all the items on Aliexpress or Baidu are NOT all the same. There are several small shops making clones and some are somewhat "Boutique" if there is such a thing in China, and some just make poor quality look alikes.
What I did find is that the FM modules have proven difficult to replicate, however the module in the entry level Preamp FM155 was cracked with great success and that was my first purchase which unfortunately skewed my perception of the quality of China gear. Several Baidu sits recently claim they have cracked the latest 19200 HR modules as earlier ones had some noise when SE outs were used.

Most of the gear is single ended with the modules being Balanced to SE converters that have good rejection. The amps are not bridged and use a SE signal.
There is a "House" sound to FM gear that is spacious and gives outstanding vocal reproduction. I have heard better low bass and slam but the midrange is really special.
I did find a shop based in Beijing ( Oak Leaf )that makes very good units but they are expensive and bought a 222MK2 Phono stage from them.

The 711 schematic has a special high breakdown diode that gets subbed for a regular diode and that is the only thing I can find in good power amp clones other than matching of transistors and their branded power transistors. They also use 2 bridge rectifiers which gives lower forward resistance and is a ground loop breaker.
The PCB's have been cloned for identical layouts as well.
The FM amps are quasi complimentary like the Phase Linear and JLH amp so they do not use complimentary NPN / PNP outputs.

FWIW I sold my Levinson ML333 and kept the FM711 clone.
Click to expand...
hi, I'm looking for a cracked FM 19202 module, can you help me? Thanks .
Ago
 
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