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    Riley Casey commented in another thread that some...

    Riley Casey commented in another thread that some in built Eq in an active crossover can be quite useful.

    Without doing a deep dive into what EQ can and can't fix as a rule EQ can't fix phase...
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    So why are discrete operational amplifiers not...

    So why are discrete operational amplifiers not more widely used in professional and consumer electronics. The answer they are used in premium equipment but that comes at a cost. The question then is...
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    In the previous post l discussed some of the...

    In the previous post l discussed some of the performance limitations of monolithic opamps in audio applications.

    But this is not really new news. Dean Jensen, an astute and very talented American...
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    I have seen some people upgrade the legacy JBL...

    I have seen some people upgrade the legacy JBL 5234/5235 active crossover with new monolithic opamps in the past.

    This is a good idea where the Opamp used was a TL074. This Opamp and is dual...
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    My analogue crossover l have mentioned will use...

    My analogue crossover l have mentioned will use discrete operational amplifiers and low impedance design. The estimated cost ex works will be around US$2400 mark. In adjusted US$ the JBL DX1 would be...
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    Another problem arises. The monolithic op amp...

    Another problem arises. The monolithic op amp only has a small fraction of output current in class A. It therefore has to drive this load in class B. But class B leads to higher distortion and noise...
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    The story does not end there. If your...

    The story does not end there.

    If your crossover has a rated noise level of -110 db then itís connected to your power amp with a rated noise of -110db the noise level jumps to -104db. How do? The...
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    As a rule the noise level should be at least 70...

    As a rule the noise level should be at least 70 db below the lowest signal level in normal operation. Not the manufacturers rated noise performance at the rated output. The reason is that in practice...
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    One of the bug bears with using an active...

    One of the bug bears with using an active crossover is the issue of ground loops that can intrude as a hum or buzz. In most but not all cases this is mitigated with balanced equipment inputs and...
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    On the fan noise it really is a pain if you run...

    On the fan noise it really is a pain if you run your system a normal domestic levels.

    The quietest fans are around 30-40 db or so. But around 60db is going to annoy you after a while. To explain...
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    Great 👍 post. Your point on the fan is...

    Great 👍 post.

    Your point on the fan is noteworthy.

    A while back a number of users of BSS units hit this fan noise problem and attempted various diy adventures to mitigate the noise. The same...
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    Great journey. Enjoy

    Great journey.

    Enjoy
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    Looking more closely at post 34/35 above in more...

    Looking more closely at post 34/35 above in more detail.

    One of the misconstrued notions about a digital universal active crossover or any universal active crossover is that its quick easy fix to...
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    Some consumer loudspeaker manufacturers such as...

    Some consumer loudspeaker manufacturers such as Dynaudio and Kef are spearheading full active loudspeakers. An active loudspeaker as a rule has all the power amplifiers built inside the loudspeaker....
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    The limitation of all universal active crossovers...

    The limitation of all universal active crossovers including dsp digital and FIR digital crossovers is as stated above. You have to know the precise crossover settings and a detailed understanding...
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    If your following these posts the structured...

    If your following these posts the structured approach to the application of active crossover very much makes the application of the active crossover easier implement successful. Take out the guest...
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    Subject to further investigation the existing pre...

    Subject to further investigation the existing pre determined systems can be improved with active crossover approaches not available in passive crossover implications. This was applied to the...
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    2. The project/diy louder system. The thinking...

    2. The project/diy louder system. The thinking cap customer.
    This application is more open ended in that the user has license for prescribing the loudspeaker system design meaning the component...
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    Where to from here? Again applying more...

    Where to from here?

    Again applying more structured thinking the application of an active crossover can be classified into some applications. This then enables a more specific focus on the active...
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    3. What goes in one end of the active crossover...

    3. What goes in one end of the active crossover and out the other end is not entirely to be assumed a straight wire with unity gain. Stereophile Speak. Just like any preamp. Thereís differences is...
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    I have acquired propensities for long wordy posts...

    I have acquired propensities for long wordy posts so l will try and break up my recent experiences in single posts.

    To my unnecessarily structured way of thinking an active crossover is not...
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    Not many posts here in recent times. Just...

    Not many posts here in recent times.

    Just wondering if anyone wants to share their active crossover experiences?
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    Very funny. I used to watch a lot of UK comedy...

    Very funny. I used to watch a lot of UK comedy once. Billy Connolly is another funny guy. Sadly thereís not enough of that in the world these days.
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    Thatís great news

    Thatís great news
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    Iím out and about and lím okay. I wouldnít say l...

    Iím out and about and lím okay. I wouldnít say l am 100%.

    While was in isolation l determined l should retire and as a result become even more annoying..Lol.

    Being called an old fuck makes me...
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