I am not sure I understand - do you mean to use a transformer as input for gain? Like Neutrik NTM-4?
Me?
Transe = transistor - In this case;-)
A transformer ... a cheap thing does really good sound too. But the gain ... may be, it would not be enough.
I do use:
NFU 1-10: NF-Ubertrager, 1:10, RM 10 x 12,5 mm bei reichelt elektronik
and the other ones here.
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I tried to simulate the LM317 amps, both versions. I played around with the power supply voltages and gains and I think it should work for a trial. I also found this one by google: https://www.electroschematics.com/6684/lm317-audio-amplifier/ There are also some crazy LM317 designs by Elvee here. Thanks to everyone for inspiration, now it is time to get some parts and start experimenting🙂
For very good measured performance (low noise) You can check out Neurochrome Audio's Modulus amplifiers
Neurochrome Audio: High performance DIY audio circuits.
One diyA member used them with his horn speaker system:
https://www.diyaudio.com/forums/ven...ier-achieving-0-0004-thd-226.html#post4821224
By further investigations on the subject, I found the FAOW amplifier and also the following thread - so I am saving it here for reference. amplifier for compression driver
I am sure I had some old SE Tube OTs somewhere...just need to find them🙂
I am sure I had some old SE Tube OTs somewhere...just need to find them🙂
The time has come when I will actually need the amplifier - for running a pair of DCX464 in large 350 Hz horns (passive crossover for the HF). I ordered a TPA6120 board with a power supply and a box to try out. The horns are loud enough when running directly from a headphone output of an old laptop, so this should work well.
1 transistor, 1 trimmer, 1 power resistor. 1 input cap. 1 output cap. Nothing else.
The quality of the parts will make the sound - a lot to proof;-)
No interactive or active load.
No balancing.
Your last amp;-)
Yes, I may try that one day - lack of time and lack of good low noise power supply called for an easier solution at the moment.
Use Juma’s Easy Peasy cap multiplier for PSU. Simple and reduces ripple by 50dB. Can make as dead bug on mosfet legs.
Yes, that one would be definitely a part of the PSU, when it comes to that stage. I already have some parts and some nice heatsinks.
If you feel MOSFET doesn't sound very well, I would extend that to anything that isn't a triode or a SIT.
Greetings pelanj, all,
I have the similar issue like pelanj, except, perhaps a little worse, 115dB/W/m if I can trust my lying equipment.
Could something like this http://pmacura.cz/buffer_en.html drive nominal 8 Ohms compression driver?
Kindest regards,
M
I have the similar issue like pelanj, except, perhaps a little worse, 115dB/W/m if I can trust my lying equipment.
Could something like this http://pmacura.cz/buffer_en.html drive nominal 8 Ohms compression driver?
Kindest regards,
M
Use the lpuhp (the wire)or 4 lme49600 in parallel super low noise and 8Watt at 8Ohm.
https://www.diyaudio.com/community/...perfromance-lpuhp-16w-power-amplifier.204069/
https://www.diyaudio.com/community/...perfromance-lpuhp-16w-power-amplifier.204069/
You could use a headphone amp that can handle 8ohm loads.
Need something with very low noise as 115dB sensitivity is going to pick up the lowest level of PSU hash or background hum.
Hi xrk971,
The attraction of the circuit I posted is that it can be used with 12V batteries.
Kindest regards,
M
I know that, what I do not know is how to determine, whether the amplifier will handle it.
The attraction of the circuit I posted is that it can be used with 12V batteries.
Kindest regards,
M
Isn't there a low power class d amp that's decent, like a "pro" version of the PAM 8403? Aren't there class d chips for headphone amps?