Same amps, same gain no volume control in the amps ? Nothing to tune.How closely were the output levels matched during the AB (ABX?) testing?
Strange LC not notice this.
This happens only with a DPS-500. therefore, we need an attenuator.
Ab test of what we talk? same old story?
this is recording of output voltage on load with music.
You think maybe is not udible the spl difference?
is unacceptable, your behavior (Esperado), and LC.
this is the reason that I want to run away from this thread.
This happens only with a DPS-500. therefore, we need an attenuator.
Ab test of what we talk? same old story?
this is recording of output voltage on load with music.
You think maybe is not udible the spl difference?
is unacceptable, your behavior (Esperado), and LC.
this is the reason that I want to run away from this thread.
Attachments
Last edited:
Just to clarify I also want black. BTW is there a picture of this chassis?
I also changed my chassis to black...
luca 4
danny_66 2
woofertester 4
rainerco 2
pinnocchio 2
jokari69 2
mksung 2
ZZoran 2
Edgar 2
Eric06 2
kimon 2
maxidcx 2 (chassis black)
edbk 2 (chassis)
metallicus69 2
scoutOne 4
quan 2
Greg Stewart 2
colesey 2 (chassis)
analogsa 4
Theodosis O. 2
chunek 2
CaféNoir 4 (chassis)
Nikitas 2 (chassis)
meanman1964 2
jeremysk 2
Dane 2
mikvous 2 (chassis)
PreSapian 2
coolewater 2
edionysus 2 (chassis)
jaggel 2 (chassis black)
fredlock 2
HiroPro 2 (chassis black)
Turbon 2 (chassis)
r8833 2
androa76 2
JethroTull 2
stonehome 2 (chassis)
commstech 2
we417 2
hcbonfim 2
stormsonic 2 (chassis)
fishball79 4
Catal 2
Overkill Audio 7
touchdown 2
sebbyp 2
a333bt 2
flyboi 4
rellum 2
huibert34 2 (chassis)
tjencks 2
back 4
gusto142 2 (chassis)
julcat 2 (chassis)
taccodude 2
glt 2
Dear LC I read your message today and thank you for your good work.I want to mention some points of interest that might be useful to the GB members: 1)Payment methode;Paypal's 5% fee on 500-600 euros order is a considerable amount of money.Is it possible,alternatively, to have payment send to your bank account ? (like in the VSSA GB). 2)I am interested also in the FO chassis;I didn't order it with the modules, because it was too early.Maybe I am wrong,but I thought that every GB member would receive informations about GB offers, i.e.modules,chassis and postages for both.Should I change my order or place a new one?If some delay occurs because of that, it's okay with me.
Hello LC,
My goal is to build an integrated amplifier.
What else do I need besides the two FO modules, the SMPS and the chassis?
Greetings from Greece
Shanachai
Please read post #634
Yes, more than 30 hours of burn-in period for all SMPS-s in the test.Hi LC,
Were the capacitors from the SPMS's also burned in?
Perhaps a good idea to repeat the listening tests next week (for confirmation) before comparing single and dual SMPS operation.
regards,
John
How closely were the output levels matched during the AB (ABX?) testing?
Did you match by voltage or by audio level?
All First One amps have the same gain. Volume control set on the same level for each track played.
Just to clarify I also want black. BTW is there a picture of this chassis?
Yes, post #533. Black is the same design and will be posted later when prepared.
Dear LC I read your message today and thank you for your good work.I want to mention some points of interest that might be useful to the GB members: 1)Payment methode;Paypal's 5% fee on 500-600 euros order is a considerable amount of money.Is it possible,alternatively, to have payment send to your bank account ? (like in the VSSA GB). 2)I am interested also in the FO chassis;I didn't order it with the modules, because it was too early.Maybe I am wrong,but I thought that every GB member would receive informations about GB offers, i.e.modules,chassis and postages for both.Should I change my order or place a new one?If some delay occurs because of that, it's okay with me.
I apologize for any inconvenience but for this GB payments via PayPal only.
You can order modules first, chassis after or wait and order both of them later, no problem. Send me PM and I'll prepare you an offer.
First One GB list update
Hi GB members
Thanks for the payments, some of you are faster than lightning.
Today the offers for GB members who's ordered chassis will be send out.
Chassis will be completely prepared for SMPS1200A400, Hypex, power supply.
luca 4
danny_66 2
woofertester 4
rainerco 2
pinnocchio 2
jokari69 2
mksung 2
ZZoran 2
Edgar 2
Eric06 2
kimon 2
maxidcx 2 (chassis black)
edbk 2 (chassis)
metallicus69 2
scoutOne 4
quan 2
Greg Stewart 2
colesey 2 (chassis)
analogsa 4
Theodosis O. 2
chunek 2
CaféNoir 4 (chassis)
Nikitas 2 (chassis)
meanman1964 2
jeremysk 2
Dane 2
mikvous 2 (chassis)
PreSapian 2
coolewater 2
edionysus 2 (chassis)
jaggel 2 (chassis black)
fredlock 2
HiroPro 2 (chassis)
Turbon 2 (chassis)
r8833 2
androa76 2
JethroTull 2
stonehome 2 (chassis)
commstech 2
we417 2
hcbonfim 2
stormsonic 2 (chassis black)
fishball79 4
Catal 2
Overkill Audio 7
touchdown 2
sebbyp 2
a333bt 2
flyboi 4
rellum 2
huibert34 2 (chassis)
tjencks 2
back 4
gusto142 2 (chassis)
julcat 2 (chassis)
taccodude 2
glt 2
Hi GB members
Thanks for the payments, some of you are faster than lightning.
Today the offers for GB members who's ordered chassis will be send out.
Chassis will be completely prepared for SMPS1200A400, Hypex, power supply.
luca 4
danny_66 2
woofertester 4
rainerco 2
pinnocchio 2
jokari69 2
mksung 2
ZZoran 2
Edgar 2
Eric06 2
kimon 2
maxidcx 2 (chassis black)
edbk 2 (chassis)
metallicus69 2
scoutOne 4
quan 2
Greg Stewart 2
colesey 2 (chassis)
analogsa 4
Theodosis O. 2
chunek 2
CaféNoir 4 (chassis)
Nikitas 2 (chassis)
meanman1964 2
jeremysk 2
Dane 2
mikvous 2 (chassis)
PreSapian 2
coolewater 2
edionysus 2 (chassis)
jaggel 2 (chassis black)
fredlock 2
HiroPro 2 (chassis)
Turbon 2 (chassis)
r8833 2
androa76 2
JethroTull 2
stonehome 2 (chassis)
commstech 2
we417 2
hcbonfim 2
stormsonic 2 (chassis black)
fishball79 4
Catal 2
Overkill Audio 7
touchdown 2
sebbyp 2
a333bt 2
flyboi 4
rellum 2
huibert34 2 (chassis)
tjencks 2
back 4
gusto142 2 (chassis)
julcat 2 (chassis)
taccodude 2
glt 2
Attachments
Thanks for kind words shanachai
First One is power amplifier module with input impedance 10 kOhm and 1,5 Vrms input sensitivity for full power output.
Preamplifier is needed to switch between the inputs - input selector and to have at least output buffer - volume control. It can have 0 dB or + 10 dB voltage gain too, depending to your source's output level.
My suggestion: RelaiXedSMD -- DIY balanced pre-amplifier
LC, many thanks for the answer and apologies for the double post (page 64 was not being displayed).
This Site doesn`t won`t show the last posts and Pages above 61 don`t open.
..........reg. page 61 jumping? works ok here with google chrome, maybe clearing browser history solves problem??
For others who have trouble with displaying certain pages, try as irribeo suggested "clearing your browser history cache". It worked for me and I'm on Win7 and IE11. The problem started when moderator cleaned thread for some post's.LC, many thanks for the answer and apologies for the double post (page 64 was not being displayed).
payment sent but do we need to post it here?
thanks for the great work.
hehe if you wish, otherwise not necessary, every payment double checked and registrated on my side.
Hi LC,
Just received your proforma invoice but I'm afraid we have to amend it.
Please include 2 more boards and change the color of the case from silver to black.
Please send me the new proforma when ready.
Thanks and apologise for the inconvenience.
Done.
Regards L.C.
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