hi guix, i need help plz, could someone can send me a bass mid and treble control circuit using 4558 ic? plz, i really need it. thank you in advance,
hi. tnx for the pdf, but that op-amp ic is not available here in our locality, can i replace it with 4558, because it is more available, and can i ask if it is really not inverted? tnx
That is very well spotted 🙂 The pins look reversed, it should be inverting, as are all these type of stages.
Any common opamp can be used, TL072, 4558, TL082, OPA2134 etc with no change needed to any other parts.
Any common opamp can be used, TL072, 4558, TL082, OPA2134 etc with no change needed to any other parts.
Hi,
+/- 20dB in a tone control is OK for music instrument
amplifier, it is very excessive in terms of a hifi amplifier.
Anyway you can find loads of op-amp baxandall tone controls.
rgds, sreten.
+/- 20dB in a tone control is OK for music instrument
amplifier, it is very excessive in terms of a hifi amplifier.
Anyway you can find loads of op-amp baxandall tone controls.
An externally hosted image should be here but it was not working when we last tested it.
rgds, sreten.
yeah tnx a lot, your a big help for me, i forgot if it is using single or split power supply, i will check it again later, but can i use any of those two power supplies? so it should be inverting, right? tnx again for that, can i also ask if what kind of capacitors will i have to use? if it is polyester or ceramic. i apologize if i had a lot of questions, hehe
hello mooly, tnx for the help, if it is ok with you, can you add a midrange control in the circuit? please? tnx again
You just add another section. Here is a worked example, see number 2 in this link,
Three circuits of preamp tone controls by NE5532 | Eleccircuit.com
Three circuits of preamp tone controls by NE5532 | Eleccircuit.com
Caps 1uf and under that are in the signal chain should be film or polyester type. ry to avoid ceramics for those in the audio path. Anything over 1uf and you are looking at electrolytics (unless you believe in using very large bulky and expensive alternatives).
I've moved your LM3886 questions here 🙂
http://www.diyaudio.com/forums/chip-amps/275316-lm3886-mute-resistor-calculation.html
can anyone give the circuit of bass boost of 4558op-amp using single supply. i'll try this circuit too much but not getting bass boost using single supply voltage..thnx
polyester is a type of film cap, the prefered film caps are polypropylene (PP) or polystyrene (PS) or polyphenylene sulfide (PPS) or teflon (PTFE) for best linearity, polyester is slightly inferior to these, but not hugely bad.
Ceramic caps that are not NP0/C0G are not linear or stable and have no place in a filter circuit signal path, use only for decoupling. The NP0/C0G types are perfectly good though.
Electrolytics do not have stable values and should be avoided for filter circuits if at all possible.
Post the diagram of the exact circuit configuration you are trying to use on single rail.
Right then... it won't work. The configuration is all wrong. The first opamp will produce absolutely no audio output because the input (via the 10k) is feeding into a 'virtual ground' which appears as a short circuit to audio.
The same applies to second opamp. It can not work.
Even if you correct those two errors, the response of the circuit will be unusable I suspect.
The same applies to second opamp. It can not work.
Even if you correct those two errors, the response of the circuit will be unusable I suspect.
Attachments
A quick google for "bass boost circuits" found the following page:
Bass boost - active and passive collection of circuits for all
Plenty of bass boost circuits here, including a single supply op amp circuit.
Bass boost - active and passive collection of circuits for all
Plenty of bass boost circuits here, including a single supply op amp circuit.
It needs a total rework. As it stands (after a simple modification) you can only configure it to reduce HF, not boost bass.
Even the input coupling cap is the wrong way around. It is a disaster.
This will give a gain of '1' and you could then add caps to reduce HF but not to actively boost the bass.
Also I think 5 volts is to low for the 4558 opamp to function correctly.
