Hello everyone,
I'm newbie and i almost finish my first gainclone amp (based on LM3886 chip). I added a very nice pre-amp (diy also) and now i want complicate things adding a headphone jack. My idea is put the headphone jack after preamp but before amp with a jack/switch (for switching off the speakers).
Can you help with comments about the wiring? I need to put resistor, capacitor, etc? There's any risk of damage for the Amp?
BTW: Sorry for my english 😀
I'm newbie and i almost finish my first gainclone amp (based on LM3886 chip). I added a very nice pre-amp (diy also) and now i want complicate things adding a headphone jack. My idea is put the headphone jack after preamp but before amp with a jack/switch (for switching off the speakers).
Can you help with comments about the wiring? I need to put resistor, capacitor, etc? There's any risk of damage for the Amp?
BTW: Sorry for my english 😀
Most preamps can't drive low impedance headphones without a buffer.
The simplest option is to connect the headphone jack after the amplifier
with two small value series resistors, assuming the amplifier is not balanced.
Hi rayma,
Thanks for the reply. This is the pre-amp that i built:
Hi-Fi Preamplifier
would could happen if the preamp can't drive low impedance headphones?
Thanks for the reply. This is the pre-amp that i built:
Hi-Fi Preamplifier
would could happen if the preamp can't drive low impedance headphones?
Hi Rayma,
Thanks for the reply. This is the pre-am that i built:
Hi-Fi Preamplifier
would could happen if the preamp can't drive low impedance headphones?
Thanks for the reply. This is the pre-am that i built:
Hi-Fi Preamplifier
would could happen if the preamp can't drive low impedance headphones?
Do you have the 5532 datasheet?
it specifies the lowest impedance for load and the maximum current (not the short circuit current).
You might just about be able to run 600ohms headphones from a 5532 but it will probably get very warm, or maybe overheat.
The 5532 has two channels inside so has to get rid of twice the heat compared to a 5534.
it specifies the lowest impedance for load and the maximum current (not the short circuit current).
You might just about be able to run 600ohms headphones from a 5532 but it will probably get very warm, or maybe overheat.
The 5532 has two channels inside so has to get rid of twice the heat compared to a 5534.
I suggest looking into an actual headphone amplifier. There are quite a few schematics floating around based on the BUF634. I put one together in a circuit simulator and it performs quite nicely.
Tom
Tom
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