Hotone Nano Legacy Amps - Heart Attack  [traced]

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Re: Hotone Nano Legacy Amps - Heart Attack

Postby phatt » 25 Dec 2017, 04:44

Specs state 6 Watts max into 8 Ohm load.
These are car amp chips and are designed to work into low Ohms and the output drops quite a lot into 8 Ohms
Also if you are using hifi type woofers or similar then the output SPL will be reduced even more. You need to use an MI speaker.

Another thing to note; You mentioned you have several preamp stages and the output might be too hot for such a small power stage.
As mentioned by *Fiveseven* above,, you need head room if you want clean and that means larger supply voltage and if that is not enough then a higher output power amp section.

It is my observation from experience that LM1875 chip or similar is just the ideal size for small bedroom amps the really small stuff just does not have the head room for clean.
At a guess the LM1875 should get close to 10Watts into 8 Ohms even from a single 20 Volt supply.

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J0K3RX (25 Dec 2017, 18:23)
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Re: Hotone Nano Legacy Amps - Heart Attack

Postby Ichabod_Crane » 25 Dec 2017, 14:58

Definetly I need more headroom, indeed I want absolute to find the right PSU how I described before.

I want to be more clear to help the topic. My experimental project, and I am not an expert, will have two separate preamps (clear and high gain), maybe one buffer in front of them, and one booster with the high gain preamp.
I never considereted the number of circuits in front of the power amp. I tested with happy results all the stages in front my main guitar amp. Now I'm testing the power amp stand alone with my cab.
My cabinet is a simple homemade cabinet, a wood box with a cheap 8" guitar amp 8 Ohm.

I'll remember the LM1875 for a louder amp project. Now, the TDA2003 should be fine. At least I would.
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Re: Hotone Nano Legacy Amps - Heart Attack

Postby peterc » 27 Dec 2017, 18:49

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