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VSSA Lateral MosFet Amplifier

Hi dear diyAudio friends :wave:

Now is the right time to present all the details about the VSSA set. Today I received the test batch of a six VSSA PCB's for final inspection, which actually means to assemble two VSSA channels, test their full functionality and only than order something like 200 PCBs. I really don't want any surprises so this precaution step is necessary at least from my point of view.

PCBs are very good quality, FR4 material 2 mm thick, 0,1 mm thickness of copper tracks, this can actually be seen on pics, finger's touch confirms that too.

I know all would like to know something about the pricing, well, here it is. The whole package for one VSSA channel consists of a VSSA PCB, all semiconductors, two 2 mm polyamide spacers for KSA/KSC, bill of materials and assembling instructions for roundly and exactly 30,00 EUR net price. Only postal-shipment costs will be added onto this price, the amount depends on destination, so this will be calculated from case to case individually.

Any questions?
Best regards, Andrej :cheers:


Hi Andrej,

This is great and for some of us it is a rare opportunity to build a world class amp. I see you are offering the semiconductors, is it possible to offer rest of the SMD parts too and adding their price to final price. Because some of us don't have the SMD resistors/capacitors and probably cost more to source them separately. But if you would offer that as part of the kit, I believe most of the people jump in.

Kudos to your contribution.
 
Joachim Gerhard 2 PCB set
AKN 2 PCB set
Idefixes 2 PCB set
kimon 2 PCB set
brianco 2 PCB set
Dane 2 PCB set
MKHunt 2 PCB set
Cambe 2 PCB set
Supernet 2 PCB set
boyet0173 2 PCB set
tom42107 2 PCB set
presbel 2 PCB set
meltman 2 PCB set
gannaji 2 PCB set
dodo 2 PCB set
jj506 2 PCB set
vgeorge 2 PCB set
touchdown 2 PCB set
wponline 2 PCB set
Luke 4 PCB set
cvtaudio 10 PCB set
Renio 2 PCB set
maillard 2 PCB set
PauloPT 2 PCB set
hcbonfim 2 PCB set
gusto142 2 PCB set
PinkPink 2 PCB set
dine1967 2 PCB set
bressix 2 PCB set
nico2k3 4 PCB set
routhun 2 PCB set
CaféNoir 4 PCB set
ColinAlex 8 PCB set
Murdoc 2 PCB set
regal 2 PCB set
AUSTINP 2 PCB set
kroyin 2 PCB set
fredlock 2 PCB set
mikvous 2 PCB set
myfi 2 PCB set
FelixG 4 PCB set
ichiban 2 PCB set
padamiecki 2 PCB set
gogu 2 PCB set
joshvi 2 PCB set
philippeleite 2 PCB set
DavorXXL 6 PCB set
sakdi 2 PCB set
buzzfo4b 2 PCB set
acqu27 2 PCB set
siberia 2 PCB set
mravlca 2PCB set
baswamin 2PCB set
gazzagazza 2 PCB set
miksi 4 PCB set
chunek 4 PCB set
raysimmons 2 PCB set
johnkrammer 2 pcb set
jony 2PCB set
analog_sa 2PCB set
davidhoang ,4 channels
 
Joachim Gerhard 2 PCB set
AKN 2 PCB set
Idefixes 2 PCB set
kimon 2 PCB set
brianco 2 PCB set
Dane 2 PCB set
MKHunt 2 PCB set
Cambe 2 PCB set
Supernet 2 PCB set
boyet0173 2 PCB set
tom42107 2 PCB set
presbel 2 PCB set
meltman 2 PCB set
gannaji 2 PCB set
dodo 2 PCB set
jj506 2 PCB set
vgeorge 2 PCB set
touchdown 2 PCB set
wponline 2 PCB set
Luke 4 PCB set
cvtaudio 10 PCB set
Renio 2 PCB set
maillard 2 PCB set
PauloPT 2 PCB set
hcbonfim 2 PCB set
gusto142 2 PCB set
PinkPink 2 PCB set
dine1967 2 PCB set
bressix 2 PCB set
nico2k3 4 PCB set
routhun 2 PCB set
CaféNoir 4 PCB set
ColinAlex 8 PCB set
Murdoc 2 PCB set
regal 2 PCB set
AUSTINP 2 PCB set
kroyin 2 PCB set
fredlock 2 PCB set
mikvous 2 PCB set
myfi 2 PCB set
FelixG 4 PCB set
ichiban 2 PCB set
padamiecki 2 PCB set
gogu 2 PCB set
joshvi 2 PCB set
philippeleite 2 PCB set
DavorXXL 6 PCB set
sakdi 2 PCB set
buzzfo4b 2 PCB set
acqu27 2 PCB set
siberia 2 PCB set
mravlca 2PCB set
baswamin 2PCB set
gazzagazza 2 PCB set
miksi 4 PCB set
chunek 4 PCB set
raysimmons 2 PCB set
johnkrammer 2 pcb set
jony 2PCB set
analog_sa 2PCB set
davidhoang ,4 channels
Malvin 2 PCB set
 
Joachim Gerhard 2 PCB set
AKN 2 PCB set
Idefixes 2 PCB set
kimon 2 PCB set
brianco 2 PCB set
Dane 2 PCB set
MKHunt 2 PCB set
Cambe 2 PCB set
Supernet 2 PCB set
boyet0173 2 PCB set
tom42107 2 PCB set
presbel 2 PCB set
meltman 2 PCB set
gannaji 2 PCB set
dodo 2 PCB set
jj506 2 PCB set
vgeorge 2 PCB set
touchdown 2 PCB set
wponline 2 PCB set
Luke 4 PCB set
cvtaudio 10 PCB set
Renio 2 PCB set
maillard 2 PCB set
PauloPT 2 PCB set
hcbonfim 2 PCB set
gusto142 2 PCB set
PinkPink 2 PCB set
dine1967 2 PCB set
bressix 2 PCB set
nico2k3 4 PCB set
routhun 2 PCB set
CaféNoir 4 PCB set
ColinAlex 8 PCB set
Murdoc 2 PCB set
regal 2 PCB set
AUSTINP 2 PCB set
kroyin 2 PCB set
fredlock 2 PCB set
mikvous 2 PCB set
myfi 2 PCB set
FelixG 4 PCB set
ichiban 2 PCB set
padamiecki 2 PCB set
gogu 2 PCB set
joshvi 2 PCB set
philippeleite 2 PCB set
DavorXXL 6 PCB set
sakdi 2 PCB set
buzzfo4b 2 PCB set
acqu27 2 PCB set
siberia 2 PCB set
mravlca 2PCB set
baswamin 2PCB set
gazzagazza 2 PCB set
miksi 4 PCB set
chunek 4 PCB set
raysimmons 2 PCB set
johnkrammer 2 pcb set
jony 2PCB set
analog_sa 2PCB set
davidhoang ,4 channels
Malvin 2 PCB set
vitalica 2 PCB set
 
Joachim Gerhard 2 PCB set
AKN 2 PCB set
Idefixes 2 PCB set
kimon 2 PCB set
brianco 2 PCB set
Dane 2 PCB set
MKHunt 2 PCB set
Cambe 2 PCB set
Supernet 2 PCB set
boyet0173 2 PCB set
tom42107 2 PCB set
presbel 2 PCB set
meltman 2 PCB set
gannaji 2 PCB set
dodo 2 PCB set
jj506 2 PCB set
vgeorge 2 PCB set
touchdown 2 PCB set
wponline 2 PCB set
Luke 4 PCB set
cvtaudio 10 PCB set
Renio 2 PCB set
maillard 2 PCB set
PauloPT 2 PCB set
hcbonfim 2 PCB set
gusto142 2 PCB set
PinkPink 2 PCB set
dine1967 2 PCB set
bressix 2 PCB set
nico2k3 4 PCB set
routhun 2 PCB set
CaféNoir 4 PCB set
ColinAlex 8 PCB set
Murdoc 2 PCB set
regal 2 PCB set
AUSTINP 2 PCB set
kroyin 2 PCB set
fredlock 2 PCB set
mikvous 2 PCB set
myfi 2 PCB set
FelixG 4 PCB set
ichiban 2 PCB set
padamiecki 2 PCB set
gogu 2 PCB set
joshvi 2 PCB set
philippeleite 2 PCB set
DavorXXL 6 PCB set
sakdi 2 PCB set
buzzfo4b 2 PCB set
acqu27 2 PCB set
siberia 2 PCB set
mravlca 2PCB set
baswamin 2PCB set
gazzagazza 2 PCB set
miksi 4 PCB set
chunek 4 PCB set
raysimmons 2 PCB set
johnkrammer 2 pcb set
jony 2PCB set
analog_sa 2PCB set
davidhoang ,4 channels
Malvin 2 PCB set
vitalica 2 PCB set
Andrewc556 2 PCB set
 
Joachim Gerhard 2 PCB set
AKN 2 PCB set
Idefixes 2 PCB set
kimon 2 PCB set
brianco 2 PCB set
Dane 2 PCB set
MKHunt 2 PCB set
Cambe 2 PCB set
Supernet 2 PCB set
boyet0173 2 PCB set
tom42107 2 PCB set
presbel 2 PCB set
meltman 2 PCB set
gannaji 2 PCB set
dodo 2 PCB set
jj506 2 PCB set
vgeorge 2 PCB set
touchdown 2 PCB set
wponline 2 PCB set
Luke 4 PCB set
cvtaudio 10 PCB set
Renio 2 PCB set
maillard 2 PCB set
PauloPT 2 PCB set
hcbonfim 2 PCB set
gusto142 2 PCB set
PinkPink 2 PCB set
dine1967 2 PCB set
bressix 2 PCB set
nico2k3 4 PCB set
routhun 2 PCB set
CaféNoir 4 PCB set
ColinAlex 8 PCB set
Murdoc 2 PCB set
regal 2 PCB set
AUSTINP 2 PCB set
kroyin 2 PCB set
fredlock 2 PCB set
mikvous 2 PCB set
myfi 2 PCB set
FelixG 4 PCB set
ichiban 2 PCB set
padamiecki 2 PCB set
gogu 2 PCB set
joshvi 2 PCB set
philippeleite 2 PCB set
DavorXXL 6 PCB set
sakdi 2 PCB set
buzzfo4b 2 PCB set
acqu27 2 PCB set
siberia 2 PCB set
mravlca 2PCB set
baswamin 2PCB set
gazzagazza 2 PCB set
miksi 4 PCB set
chunek 4 PCB set
raysimmons 2 PCB set
johnkrammer 2 pcb set
jony 2PCB set
analog_sa 2PCB set
davidhoang ,4 channels
Malvin 2 PCB set
vitalica 2 PCB set
Andrewc556 2 PCB set
Atupi 2PCB set
 
Joachim Gerhard 2 PCB set
AKN 2 PCB set
Idefixes 2 PCB set
kimon 2 PCB set
brianco 2 PCB set
Dane 2 PCB set
MKHunt 2 PCB set
Cambe 2 PCB set
Supernet 2 PCB set
boyet0173 2 PCB set
tom42107 2 PCB set
presbel 2 PCB set
meltman 2 PCB set
gannaji 2 PCB set
dodo 2 PCB set
jj506 2 PCB set
vgeorge 2 PCB set
touchdown 2 PCB set
wponline 2 PCB set
Luke 4 PCB set
cvtaudio 10 PCB set
Renio 2 PCB set
maillard 2 PCB set
PauloPT 2 PCB set
hcbonfim 2 PCB set
gusto142 2 PCB set
PinkPink 2 PCB set
dine1967 2 PCB set
bressix 2 PCB set
nico2k3 4 PCB set
routhun 2 PCB set
CaféNoir 4 PCB set
ColinAlex 8 PCB set
Murdoc 2 PCB set
regal 2 PCB set
AUSTINP 2 PCB set
kroyin 2 PCB set
fredlock 2 PCB set
mikvous 2 PCB set
myfi 2 PCB set
FelixG 4 PCB set
ichiban 2 PCB set
padamiecki 2 PCB set
gogu 2 PCB set
joshvi 2 PCB set
philippeleite 2 PCB set
DavorXXL 6 PCB set
sakdi 2 PCB set
buzzfo4b 2 PCB set
acqu27 2 PCB set
siberia 2 PCB set
mravlca 2PCB set
baswamin 2PCB set
gazzagazza 2 PCB set
miksi 4 PCB set
chunek 4 PCB set
raysimmons 2 PCB set
johnkrammer 2 pcb set
jony 2PCB set
analog_sa 2PCB set
davidhoang ,4 channels
Malvin 2 PCB set
vitalica 2 PCB set
Andrewc556 2 PCB set
Atupi 2PCB set
88bruce 2 PCB set
 
Hi cvtaudio

SMPS400A180 is specified as 400 W/600 Wmax SMPS and VSSA can give 100 Wrms/4 Ohm, so enough power for two channels at least on the paper. Four VSSA will need two of these. ;)

I will test one to one just for max performance outcome in comparison with linear PSU. :cool:

Hi LC,

thank you!
Looking forward to you reporting on the differences between SPMS and linear PSU. Theoretical question: could we run the amp with a lower voltage without or just a simple modification ?
 
Hi Andrej,

This is great and for some of us it is a rare opportunity to build a world class amp. I see you are offering the semiconductors, is it possible to offer rest of the SMD parts too and adding their price to final price. Because some of us don't have the SMD resistors/capacitors and probably cost more to source them separately. But if you would offer that as part of the kit, I believe most of the people jump in.

Kudos to your contribution.

Dear LC, Please consider the above favorably. I had purchased the PCBs for Fetzilla but could not complete even after 2 years for want of Parts.
Please consider supplying all the parts that go onto the PCB, at least those which are surface mount. Then, we can complete the project.
Thanking you for a great GB.
 
Joachim Gerhard 2 PCB set
AKN 2 PCB set
Idefixes 2 PCB set
kimon 2 PCB set
brianco 2 PCB set
Dane 2 PCB set
MKHunt 2 PCB set
Cambe 2 PCB set
Supernet 2 PCB set
boyet0173 2 PCB set
tom42107 2 PCB set
presbel 2 PCB set
meltman 2 PCB set
gannaji 2 PCB set
dodo 2 PCB set
coolet 2 PCB set
jj506 2 PCB set
vgeorge 2 PCB set
touchdown 2 PCB set
wponline 2 PCB set
Luke 2 PCB set
cvtaudio 10 PCB set ;)
Renio 2 PCB set
maillard 2 PCB set
PauloPT 2 PCB set
hcbonfim 2 PCB set
gusto142 2 PCB set
PinkPink 2 PCB set
dine1967 2 PCB set
bressix 2 PCB set
nico2k3 2 PCB set
routhun 2 PCB set
CaféNoir 6 PCB set ;)
ColinAlex 8 PCB set ;)
Murdoc 2 PCB set
regal 2 PCB set
AUSTINP 2 PCB set
kroyin 2 PCB set
fredlock 2 PCB set
mikvous 2 PCB set
myfi 2 PCB set
FelixG 4 PCB set ;)
ichiban 2 PCB set
padamiecki 2 PCB set (no ALF)
gogu 2 PCB set
joshvi 2 PCB set
philippeleite 2 PCB set
mefistofelez 4 PCB set ;)
DavorXXL 6 PCB set ;)
sakdi 2 PCB st
buzzforb 2 PCB set
acqu27 2 PCB set
siberia 2 PCB set
mravlca 2 PCB set
baswamin 2 PCB set
miksi 2 PCB set
chunek 4 PCB set ;)
raysimmons 2 PCB set
johnkrammer 2 PCB set
jony 2 PCB set
sng001 2 PCB set
atupi 2 PCB set
analog_sa 2 PCB set
davidhoang 4 PCB set ;)
Malvin 2 PCB set
vitalica 2 PCB set
Andrewc556 2 PCB set
88bruce 2 PCB set
jkuetemann 2 PCB set
RAYSIMMONS 2 PCB set
Odysseas 2 PCB set
yassud 2 PCB set
Junie 2 PCB set

176 VSSA PCB set (2 PCB sets without ALFs) requests so far. Incredible. :grouphug:

That means great responsibility I have to all of you guys, that everything will be well prepared, tested and shipped without any flaws.

Let me just inform you that two of the new VSSA PCBs will be assembled by the end of this week and tested with SMPS through the weekend. Next week addresses will be collected and envelopes prepared. So much for the plans I could do before ALFs arrive.

Thanks again to each and everyone of you for the trust presented in the VSSA project. :cheers:
 
Both VSSA PCBs now filled with SMDs, one board cleaned just to show how it looks and that it is of no such bogeyman to do it. On contrary it is simple and can be done even faster than with through hole parts. Bottom all SMDs installed, top only R9, R10 CCS trimming resistors and optional R17a, R18a output bias trimming resistors not installed yet. All these can be done before big elcos are soldered, just to have more space around R9, R10 to conclude trimming procedure. ;)
 

Attachments

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Joachim Gerhard 2 PCB set
AKN 2 PCB set
Idefixes 2 PCB set
kimon 2 PCB set
brianco 2 PCB set
Dane 2 PCB set
MKHunt 2 PCB set
Cambe 2 PCB set
Supernet 2 PCB set
boyet0173 2 PCB set
tom42107 2 PCB set
presbel 2 PCB set
meltman 2 PCB set
gannaji 2 PCB set
dodo 2 PCB set
coolet 2 PCB set
jj506 2 PCB set
vgeorge 2 PCB set
touchdown 2 PCB set
wponline 2 PCB set
Luke 2 PCB set
cvtaudio 10 PCB set
Renio 2 PCB set
maillard 2 PCB set
PauloPT 2 PCB set
hcbonfim 2 PCB set
gusto142 2 PCB set
PinkPink 2 PCB set
dine1967 2 PCB set
bressix 2 PCB set
nico2k3 2 PCB set
routhun 2 PCB set
CaféNoir 6 PCB set
ColinAlex 8 PCB set
Murdoc 2 PCB set
regal 2 PCB set
AUSTINP 2 PCB set
kroyin 2 PCB set
fredlock 2 PCB set
mikvous 2 PCB set
myfi 2 PCB set
FelixG 4 PCB set
ichiban 2 PCB set
padamiecki 2 PCB set (no ALF)
gogu 2 PCB set
joshvi 2 PCB set
philippeleite 2 PCB set
mefistofelez 4 PCB set
DavorXXL 6 PCB set
sakdi 2 PCB st
buzzforb 2 PCB set
acqu27 2 PCB set
siberia 2 PCB set
mravlca 2 PCB set
baswamin 2 PCB set
miksi 4 PCB set <--correction
chunek 4 PCB set
raysimmons 2 PCB set
johnkrammer 2 PCB set
jony 2 PCB set
sng001 2 PCB set
atupi 2 PCB set
analog_sa 2 PCB set
davidhoang 4 PCB set
Malvin 2 PCB set
vitalica 2 PCB set
Andrewc556 2 PCB set
88bruce 2 PCB set
jkuetemann 2 PCB set
RAYSIMMONS 2 PCB set
Odysseas 2 PCB set
yassud 2 PCB set
Junie 2 PCB set
ivanlukic 2 PCB set

I've made some corrections...
 
May I ask why my name has been removed from the list?


176 VSSA PCB set (2 PCB sets without ALFs) requests so far. Incredible. :grouphug:

That means great responsibility I have to all of you guys, that everything will be well prepared, tested and shipped without any flaws.

Let me just inform you that two of the new VSSA PCBs will be assembled by the end of this week and tested with SMPS through the weekend. Next week addresses will be collected and envelopes prepared. So much for the plans I could do before ALFs arrive.

Thanks again to each and everyone of you for the trust presented in the VSSA project. :cheers: