• The swap meet forum is for private non-commercial transactions. Only unmoderated members can post here.

    diyAudio provides this forum for the convenience of our members, but makes no warranty nor assumes any responsibility. We do not vet any members. Use of this facility is at your own risk. Customers can post any issues in those threads as long as it is done in a civil manner. All diyAudio rules about conduct apply and will be enforced.

LME49600 Buff-A-Lot 12.5W amp PCB

Status
Not open for further replies.
It is a fairly simple design;
A smd opamp (lme49990 or similar) for feedback and ten LME49600's as output stage.

An audio input, output and a +/- 18Vdc MAX voltage input for power, that's all. Single Ended in->Single Ended out.

This is a PCB only since the parts are expensive and when I keep the weight down, shipping cost is much lower.

There are only a couple of through-hole components; elco's, 1 cap, and the connectors. Everything else is smd.

Shipping is expected to be around 10 dollars and a set of PCB's (2) costs 20 dollars.

I have one stereo sets available.
1 set shipped, 30 dollars,

PS. As you can see, there is a 60mm*70mm area underneath the LME49600's which has no parts on it and is "flat". There is where to put a heatsink of some sort. I will be mounting it vertically to the side of an enclosure by making a piece of aluminum which will perform the conducting to the chassis.
 

Attachments

  • foto (6).JPG
    foto (6).JPG
    406.5 KB · Views: 357
Last edited:
My application will be an extra/second power amplifier for my loudspeakers. I have quite sensitive loudspeakers at 90dB@1m@1W.
All the opamps/buffers operate in parallel. The output stage can deliver +/-18V (minus a bit of loss) and 2.5A of output current with short peaks of 4.5A max
Performancewise I have not made a proper measurement since my current pc has no proper line/mic input. It's silent, even with a SMPS as power supply and has no harsch turn-on or off clicks. What it sounds like? Don't know. When it's done I can compare it to my ESP P3A.

I expect it to be "boring/clean/neutral/transparant" but only when the amp is 99% complete, I will commence a full 1-to-1 compare to the ESP P3A
 
Status
Not open for further replies.