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Group order of non-inverted LM4780 pc boards? Anyone interested?

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Re: Pickem up truck...

Had a long weekend of moving, and almost everything is moved out of my old apartment except for the internet router and my laptop.

rabstg said:
So that was your WRX in the driveway...

Nope, that is my wife's car. I am still driving my 1998 Honda Civic CX hatchback, which I will keep on driving for quite a while. My wife's car is a 2004 regular WRX. It is a fun car, but she doesn't let me drive it too often.

cjd said:
First thing I thought... that house needs some color! You painting it all boring white(ish)?

Congrats on the purchase though. You have kids to fill up all those rooms?!

Nope, no kids. I just turned 24 yesterday, and don't foresee having kids for quite a while. Being married with dual income and no kids seems like a good choice for a while. As for the colors, the walls are currently a pinkish-white color, and we painted one room bluish-gray, and picked out a sandstone color, and a light brown-grey color for other rooms.

jajabin said:
Brian-
Is the LM4780 group buy finish yet?

The order is not finished yet, and I will post details in this thread when it is ready.

--
Brian
 
Brian-

Woman in a WRX, nice...

Married two children and one income... I can't complain, but I remeber dual income and no kids. It was a life time ago for me, I suggest you not rush it.

I have a similar entry way in my home that is still white. Been 3.5 yrs now and every other room in the house has been painted. Good choice on the scafolding and getting it done quickly.

Congrats and good luck on the home,

Troy
 
Brian/Peter:

What is the status of this project?

This has been asked a number of times by a number of different people but there has been only deafening silence in reply.

I know Brian was going to get some PCBs made, and I know he has had a lot on his plate in the last several months, but perhaps I missed it but have not heard anything since early June or so.

Thanks
 
Easy guys. Peter and Brian both have lives and families outside this forum. Brian now has a new handicap, er... wife, a new house and a relatively new job that he has to schedule around his free time 😀 . They'll get to it as soon as they can. You can always P2P their layout until then. It is doable with this chip, believe it or not.
 
I think this is a case where we have to draw our own conclusions. I am sure Brian and Peter are both very busy and have proper lives unlike some of us (Me!). However they both use these forums frequently and I think they have both posted today.

The fact that they have not answered questions about this project, despite being asked on several occasions, has led me to the conclusion that they have deliberately chosen not to answer these questions, and I would guess that they are working on it as commercial project. In some ways this is understandable following the fuss about commercial project earlier.

What I do not understand is why they don't just say so. A short comment saying whats happening would be very easy and whatever they have chosen to do is completely their choice, I don't have any complaints they have already produced some great stuff that I and many other have benefited from. After all this thread was started by Brian 🙂
 
Peter:

Thank you for the update.

The concern is not to rush you and/or Brian but simply to find out if it was a dead project or not. People can then decide what they want to do.

Now that it is not dead we can wait, for as long as is needed.

Thank you again
 
I too am waiting as hundreds probably are 🙂

If you are board waiting and haven't heard what the LM3886 sounds like then do what I did and jam one into on of Brian's LM3875 boards. The pinout of the chips is not that different. I only had to cut one trace on the board with a utility blade. Simple if you compare the pinouts of the two chips at the National.com site. I even unsoldered a chip and put in a new one so changing chips is posible if you want to try it bad enough.

The only thing new you have to know is that there is a mute pin. Put a 68K to 10K resistor from the Mute pin to V- to keep the mute off.
By defalt the mute is on.

How does it sound? Very different! Currently I like it more then the LM3875 and that is after a couple days of breakin. I would say LM3886 has more power and is quicker, the bass seems the same. My speakers are weak in the bass, so I may not be a good judge of bass.

Since I found a big diffence between these two chips I am wondering what the rest of the chips sounds like.

When multi-amping speakers one chip may do one frequency range better then another. Giving us even more DIY control over the music we hear.

For those who have heard the LM4780 how does it sound compared to the LM3875?

Can anyone describe how all the chips sound? Sorry I had to ask on the off chance that someone knows and is willing to share.
 
Hey brentw-

I have a handful of the Alesis amp modules Steve @ Apex.jr was selling for $5!!

Those have an LM 3886 and an LM 3876 crossed over at 1.5K with a 48 dB(not a typo !!) electronic crossover. All SMD components.

60 wpc for bass/mid, 40 wpc for tweeter. I made a set of self powered surround speakers, 6.5" two way, with some and they work really well.

I will be changing another sets x-over freq to about 100 Hz and making a sat/sub computer speaker shortly.


Best of luck on your project,

Troy
 
Alright, I will work with Peter to make this project a reality.

I am considering doing a beta run of 25 boards or less, relatively soon.

Sorry for the long delay with this project. I didn't imagine that I would be so busy with the rest of the stuff in my life for the last 4 months, new house, new married life, along with keeping busy with my full-time job. I am finally getting settled in my house, and will put effort into this project again.

--
Brian
 
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