Actually it is on the order of 4 times the power, not twice. A bridged amp produces twice the voltage which means 4 times the power but the load each amp sees is half the impedence so use 8 ohm speakers not lower or the amp will think its driving a sub-4ohm load.
so if i wanted to use a 4ohm load would i need to use another 2amps bridged the same way then parralle them?
Pretty much....you'd need a parallel-bridged configuration...there are a bunch of posts concerning in here in the 'Chips Amps' section 😎
Finally, I find a suitable chassis(factory OEM).
it has enough room for setting up different designs
I am interested in several following results:
1,3886igc/3875nigc/4780 with unregulator psu
2,3886igc/3875nigc/4780 with regulator psu
3,3875nigc with BLD
4,3886igc/4780 with BLD,bridging work
BTW,thanks BranGT,he has offered two 3875 and 4780 to help me to test.
digi
it has enough room for setting up different designs
I am interested in several following results:
1,3886igc/3875nigc/4780 with unregulator psu
2,3886igc/3875nigc/4780 with regulator psu
3,3875nigc with BLD
4,3886igc/4780 with BLD,bridging work
BTW,thanks BranGT,he has offered two 3875 and 4780 to help me to test.
digi
Attachments
I assume (perhaps wrongly) this can also be used to connect to Pro gear that only accepts XLR inputs? This is an area in which I (perhaps very obviously) have just about no experience or knowledge.
Also, the optional resistors are for what? Or does that end up being the feed for the ground wire on an XLR...
It's always fun when I discover just how little I know and understand. 🙂 More fun when folks are nice enough to answer.
C
Also, the optional resistors are for what? Or does that end up being the feed for the ground wire on an XLR...
It's always fun when I discover just how little I know and understand. 🙂 More fun when folks are nice enough to answer.
C
digi forgot to ask, how much did you pay for it (the chassis)?
even with all the searching of this forum i still cant find the answers to somestuff. 🙁
even with all the searching of this forum i still cant find the answers to somestuff. 🙁
Frequently, cheaper 'pro' gear has xlr inputs that are not really balanced inputs but just use the 'hi' and ground. XLR is the pro standard as it should be a true balanced input to reject as much environmental noise as possible. And, yes you can use the circuit for pro gear with true balanced inputs.cjd said:
Member
Joined 2002
for Evilsizer,
the chassis is 150RMB($18USD).
for JasonL,
the board is available now.
group order threads here
here is the wiki page,ROUND 2
enjoys🙂
the chassis is 150RMB($18USD).
for JasonL,
the board is available now.
group order threads here
here is the wiki page,ROUND 2
enjoys🙂
YAY! How did they work out with BrianGT's amps?
Havent found the answer to this so here it is. Would i also need to use one of these if i were to parallel your 3886 boards?
edit: went back and read on post on the other page about using it for paralled(or suggested use) but im still kinda confused. i thought you would only need it for a brigded amp not paralled as you are only increasing the current of the amp(s) to the drivers.
Havent found the answer to this so here it is. Would i also need to use one of these if i were to parallel your 3886 boards?
edit: went back and read on post on the other page about using it for paralled(or suggested use) but im still kinda confused. i thought you would only need it for a brigded amp not paralled as you are only increasing the current of the amp(s) to the drivers.
Evilsizer said:
the BLD is a unbalance to balance module,the purpose is used for connect two single amp in bridge.the two single amplifiers,can be an integrated stereo amplifier,it can be a pair of dual mono amplifiers too.
Because drv134 has certain output ability,it is beneficial to each half bridges of parallel connections.
I am still waiting for the PCB parcel of BrianGT's to arrived, it is still on the way.
digi
ok now got it. I would need three of these to parallel two sets of lm3886's and then bridge the two paralled.
thanks in advance
thanks in advance
digi01 said:
What schematics are you using for it? Did you already try it on an actual bridge with your 3886 modules?
Carlos
this is the sch file:
http://www.diyaudio.com/forums/showthread.php?postid=494571#post494571
I have work on it for my 3886igc in skeleton building.its fine😉
Now,I am setting up all parts in the chassis.I think that clean and compact assembly can obtain better performance.
http://www.diyaudio.com/forums/showthread.php?postid=494571#post494571
I have work on it for my 3886igc in skeleton building.its fine😉
Now,I am setting up all parts in the chassis.I think that clean and compact assembly can obtain better performance.