Issues when replacing tl072 high pass filter with ne5532

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ne5532 versus tl072

A 2.5 inch "woofer" is a joke.
A woofer should be a minimum of 8".

My pc speakers use a 3" drivers with a big magnets and they go down to about 100Hz so more than two octaves of bass frequencies are missing.

A TDA1554 car radio amplifier IC has fairly high distortion and low output power.
 

Re: ne5532 versus tl072

I agree that the TDA1554 is not a very good choice and surely not much better than the TDA2030. In fact, I suspect the actual amplifier (using the TDA2030) may have some problem and can still be used if the problem is solved.
Audioguru: take a good look at what has been made with respect to the TWQT and DTWQT enclosures and, may be, you change your opinion about that (or not). A very small speaker in a TWQT can reach a 50Hz bass response, it depends on the cabinet size. The link I´ve posted above provides some MathCad simulation software (Martin J. King has donne a superb work). And, surelly, a 2" speaker can reach the 80Hz region (remember the filter posted above has a cutoff freq. of 80Hz).
Regards
 

Re: ne5532 versus tl072

Audioguru: I think this topic is not the place to discuss this subject. If you dont´t agree that a small driver can be used at low frequencies I respect your opinion. I have at home a MLTWQT enclosure using 3.5" speakers and have a different opinion.
 

ne5532 versus tl072

try LA4440. It works well with a 2.5 or 3.0'' subwoofer
 

ne5532 versus tl072

A 2.5" or 3" speaker cannot produce 20Hz with enough power to be heard. They might produce 150Hz pretty well.

The Sanyo LA4440 amp IC is obsolete and is not made anymore.
 

ne5532 versus tl072

if u make it right it works. It all depends on how u make it plus it only requires little voltage input i find it better.
 

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