That's the price for B grade chips.peranders said:1000 price at Analog is 15 USD.
A grade price is $6.74.
See above.peranders said:That's the one, Urban.. Odd that the have so much lower 100 prices than Analog's 1000 prices.
Yeah that's a good idea. I mean paying 150% more / pc is no good deal at all.peranders said:I'll guess I'll call the group buy for AD8610 off. Digikey.com seems to be a good choice.
Hi P-A
In general my comments of previous posts still stands. What I do experience now after listening for a certain period of time that some of the harshness, if I even can call it that, is gone. Is it because the components are settling in or am I getting used to the sound I don't know. The music it reproduces is very smooth, detailed and open. What I like the most is the spatial image the amplifier creates. I'm also still amazed by the fact that a $5 chip acompanied by some SMD's can produce such a mature sound. All I can say is that this little amplifier produces a BIG sound.
Still busy on the housing of the amps and my new hobbyroom/bedroom speakers.
PS. Already desided what the surprise will be?
Cheers
Walter
In general my comments of previous posts still stands. What I do experience now after listening for a certain period of time that some of the harshness, if I even can call it that, is gone. Is it because the components are settling in or am I getting used to the sound I don't know. The music it reproduces is very smooth, detailed and open. What I like the most is the spatial image the amplifier creates. I'm also still amazed by the fact that a $5 chip acompanied by some SMD's can produce such a mature sound. All I can say is that this little amplifier produces a BIG sound.
Still busy on the housing of the amps and my new hobbyroom/bedroom speakers.
PS. Already desided what the surprise will be?
Cheers
Walter
Looking in the datasheet I see your point.peranders said:They are OK if you are satisfied with the output power you will get. 2 x 28 VAC is max.
Unfortunately I can't get 28, so I settled for 2x25 225VA. That must do the job as well.
Hi Roibm
I also use a 2x25VAC / 225VA transformer per amp and it works great.
Cheers
Walter
so I settled for 2x25 225VA. That must do the job as well.
I also use a 2x25VAC / 225VA transformer per amp and it works great.
Cheers
Walter
I think that 2 x 28 is actually problematical.
Datasheet, page 14, output power vs supply voltage:
we all know that our speakers are not perfect resistors, they have a variable resistance, hence, using the maximum voltage will give us only problems when the resistance drops under 8ohm. Am I wrong?
Datasheet, page 14, output power vs supply voltage:
we all know that our speakers are not perfect resistors, they have a variable resistance, hence, using the maximum voltage will give us only problems when the resistance drops under 8ohm. Am I wrong?
I have rather little experience when it comes to different loads, versus supply voltage. What happens if you have 40-42 volts and a 4 ohms speaker? Does the LMN3886 goes on it's knees or can it handle this if we talk "music"? My test speaker has 6.5 ohms DC resistance and it sang very good (with 2 x 24VAC ) compared to my 2 x 500 W Mosfet amp. I didn't supervise the signal with an ocsilloscope so I wasn't aware of how near I was clipping.
If the cooling is good and the voltage is +- 40-42 volts how does the LM3886 handle 4 ohms' loads? Anybody who knows?
My gut feeling says that 2x24-25 VAC is a very good choice and 2 x 22 VAC not so bad either if we talk decibells.
If the cooling is good and the voltage is +- 40-42 volts how does the LM3886 handle 4 ohms' loads? Anybody who knows?
My gut feeling says that 2x24-25 VAC is a very good choice and 2 x 22 VAC not so bad either if we talk decibells.
peranders said:My test speaker has 6.5 ohms DC resistance and it sang very good (with 2 x 24VAC )
Do you have a plot impedance vs frquency for these speakers?
Considering the datasheet this chip should be on it's knees. In this respect it's just a bit better than 3875.peranders said:What happens if you have 40-42 volts and a 4 ohms speaker? Does the LMN3886 goes on it's knees or can it handle this if we talk "music"?
In reallity, I don't have the possibility to test, so I'll let others.
Wouldn't it be possible to use the T version on your pcb?peranders said:The datasheet tells you also that if you are planning to use the LM3886 in a heavy application you must choose the "T" model.
I see you recommend TF, what is the reason?
T or TF, it's your choice really.roibm said:
Wouldn't it be possible to use the T version on your pcb?
I see you recommend TF, what is the reason?
... but since LM3886 has much better current capability it may handle this better?AndyB said:I have heard the 3875 clipping when driving two Peerless (8ohm) 8" SLS drives in parallell. (Powered by 2x24V AC, +-37V DC)
It sounded like some extra drums or some strange pops in the sound.
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