On a muddy system, it a muddy clump of sound. This recording has a lot of noise and effects in parts of it, even on the vocals. Same impression with Green Day - American Idiot. It was a tad fuzzy on the 3875 Gainclone and not as convincing. The subtle cymbal in one part was identifiable on the Reg 3886. The whole sound and vocal is much more solid. On the regulated 3886 the sounds like the distorted synth sounds that come in once in a while or the growly guitar are much more convincing. At the same time though there are many overlayed sounds that come in and out, some of them quite detailed. This track has strong kick drum and bass in it so is probably pretty demanding on the smallish power supply cap.
#Lm4766 vs lm3886 Pc#
(Warning, some may not find this song PC unless you realize it is quoting someone they are poking fun at) An example is cranking up Dire Straits, Money for Nothing from the Brothers in Arms CD. This is clear when playing loud passages. I am driving speakers crossed over to a sub 12db at 90HzĪs has been observed, the regulated 3886 is much more accurate. No buffering on either amp but both have no pot on the input. Power supply caps are the 12,000uF Nichicon. The Regulated 3886 has the snubberized values between the diodes and the regulator, so it is not a pure CarlosFM regulated IGC. I am currently comparing a BrianGT 3875 premium to a CarlosFM Regulated 3886 IGC built on modified Digi01 boards. In terms of power supplies, the new larger power supply board with 10,000uF (will accept 22,000uF ) per rail and Carlo's snubber design, should also help with more difficult speakers." The LM4780 should be considered as 2 - LM3886 in 1 package. Sonically, the best amp might depend on how difficult your speakers are to drive. As for power, this amp has lower current handling, making it not as suitable for lower impedence loads. Sonically, it is said to be better due to it's simplicity. This amp has the fewest pins (5 pins used for +IN, -IN, OUT, V+ and V-). "LM3875 - simplest of the higher power chipamps out there by National, bigger brother to the LM1875. Even at higher power levels, the 3875 offers best sound quality. In terms of power supplies, the new larger power supply board with 10,000uF (will accept 22,000uF ) per rail and Carlo's snubber design, should also help with more difficult speakers.īrian's comment's earlier in this thread, and from reading the datasheets, I am lead to believe that if using 8 ohm speakers, one should stick with LM3875, and stay away from LM3886 and LM4780. With the 2 amps in parallel, each amplifier sees double the output impedence, making this chipamp best for low impedence loads.Īs for a higher power solution, it seems like it would be the most sense to put a bridging chip with 2 LM4780 boards, for a setup similar to the BPA200 application note setup. The pcb that I sell has the 2 LM3886 amps inside wired in parallel, see schematic. The larger package is has higher thermal power dissipation properties. LM4780 - newest chipamp, with 2 - LM3886 dies inside the larger package. There are more pins used also (8 pins, extra V+, GND and MUTE input pins). This chip is more capable with 4 impedence loads due to the higher current handling. LM3886 - newer chipamp based on the LM3875, with higher current handling and mute functionality. LM3875 - simplest of the higher power chipamps out there by National, bigger brother to the LM1875.
Here is what I see as for the difference:
I will need to work on a FAQ (frequently asked questions) section for the website for questions like this.
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