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59 Threads found on edaboard.com: Headphone Amplifier
Try feeding the reverb input with a headphone output of the preceeding unit. The reverb output to feed another speaker amplifier. If no success, feed the reverb input from a speaker output of the preceeding unit; be gentle with the volume knob.
Hello everyone. I got trouble with my phone about 2 weeks ago while testing a homemade audio amplifier. I connected my phone stereo jack to a simple op amp inverting amplifier to test my power amplifier. It first worked well but from one day to another it didn't do. I don't know what exactly happened but it doesn't work. I connected it (...)
This is a small yet high performance headphone amplifier board. The design is follow JLH-2005 class A amplifier. In this design, BD140 was replaced with BC560 and BD139 replaced with BC550. MJE3055 is used as driver transistor. A small heatsink is enough because 200mA Iq is enough for biasing headphone (...)
Hello! I want to replace my car cd player with mobile phone. I dont have enough space for both so i want to connect mobile phone directly to speakers via custom amplifier and use phone navigation and phone mp3 player. I have four speaker connections on car audio connector. front (left,right) and rear (left,right). i think that car audio system h
You should be concerned about the headphone impedance and,limitations of OA's with higher impedance output. For 32 Ohm headphones a low level could be achieved with series mono connections between Out & Gnd ... Note most are tested with only 1k but lower impedance loads will affect max output swing and possibly more distortion. But with ne
TI (e.g. TPA6166A2), Maxim and others make switching headphone amps. Class G, Class H. These will give you much more efficiency than an LM386.
I was going to tell you to look for headphones amplifier Circuit in Google Images but many circuits are awful. An OPA2134 dual opamp from Texas Instruments is an excellent stereo audio opamp and can provide a maximum output of 37.5mW RMS per channel into a 60 ohms headphone. But many people want to damage their hearing with 100mW RMS.
I've made a few of these class A headphone amplifiers, but I got a weak humming in my latest design that I can't quite figure out the source of. I have a star grounding and a torodial transformer. The humming is constant, it does not depend upon the setting of the volume pot and it doesn't even depend upon gain! I have a button that switched betwee
I would like to make a headphone amplifier using transistors (mostly bipolar junction and if required FET) instead of Op-Amps. The specification of the amplifier is that it should: Provide an improved sound quality over the un-amplified output of the MP3 player. Have an input impedance of at least 100kΩ. (...)
I want to make a headphone amplifier with the LM4809. But, I want to combi
I bought some speakers from a thrift store. They sound good but don't have any built in amplification system and are really quiet when played directly from a headphone jack. I want to build an amplifier circuit for it but so far everything I have tried has sounded terrible. Does anyone know if there is a way to build a good sounding (...)
Presented here design is a small headphone amplifier for electrical guitar. It uses the so-called joule thief ? a converter used for the maximal use of batteries AAA. Such a converter gives more than 3V. Another impo
Hi. I just made a class A amp and tested it on my breadboard. It sounded as good as my ears could hear, the only drawback was a little background noise. I have now made a complete circuit and I'm planning on etching the board to get a decent result out of it. I would like to get some feedback, is this a decent way of doing it? Can changes be made t
You can make an audio amplifier from easy to use IC's such as LM386 or TDA2002 or TDA 2003. Only a few components need to be added. Check power supply specs to make sure it can run from your metal detector supply. To cut off the speakers automatically when you plug in headphones, there is the 3-conductor headphone jack with internal switching.
Hi, I am relatively new with building my own PCB stuff, but have been moderately successful so far. So here's my problem. I operate an endurance road race team, and we are low budget. Rather than have some fancy radios, we use our iPhones as communication between the driver and pit. It works well, but there are some complications. We use a
You need a Class D headphone amp.
Hello can you help me guess what the values of caps and resistors are ? Thank is about a ne5532 headphone preamp supplied by 9v battery P1A/B i would use a 50k pot dual taper c1=c6 i use 2.2uf mkp R1=R5 i would use 2k c4=c8 i would use 470uf/16v c5 i would use 470 to 1000uf / 16v
IF you are limited to a single transistor with the fewest parts.... Consider power gain as voltage gain and current gain. The mic has a FET current source whereby the voltage gain is determined by the load resistance at the expense of a higher supply voltage. Then use your ONE transistor choice to a Darlington biased at a low voltage so
The assumption of this project was to create a simple and reliable device. The construction is based on two tubes ? 6N2P and 6N13S. The amplifier is divided, what provides good and 'clear' sound. Power supply
Presented here construction is a small (11x10x7cm) amplifier based on tubes. A box of a toy acts as a housing. PCC88 operate on White's duplicate without speaker transformer. A tube is intended for a channel. Power s