Indeed, eventually, random outcomes all revert to the mean, meaning that streaks eventually end. Understanding this is a key part of intelligent and rational investing.
Great video. Off axis response (especially horizontal) indeed is very important if the room is less than ideal. To improve this I'd advise a waveguide on the tweeter to match the directivity around the crossover frequency (unfortunately not an option for a finished build ofcourse). A waveguide actually has some additional benefits, greatly reducing edge diffraction and a smaller Z-offset between tweeter and midrange.
It's debatable whether "better" off-axis response improves the listening experience in an untreated room. Everyone says it now, giving it that "it must be true" label, but as far as I know, the evidence for it is thin. In fact there's rationale for more directive speakers in an untreated room, since there will be less direct reflections. Likewise with "improving" a speaker by making the off-axis response more technically perfect - you likely won't actually hear a difference, unless there's a massive change.
Going to guess you need a wave guide on the tweeter to control directivity to match the woofers better and allow lower crossover, as well as control some of those room reflections better to stop them hitting the walls and roof. Also maybe an active crossover with FIR filters to keep everything in phase in the crossover region. Don't know how far the couch is to the speakers so wave guide might beam to harshly, and not have enough distance to spread out to cover the whole seating area.
The sound power (onaxis+offfaxis total) response is important. We want the offaxis response to fall off evenly, breakup modes in the offaxis response create a response into reflective surfaces that are different from the onaxis response and will affect tonality and staging. I normally just use an angle finder against the baffle and keep the distance to the center of the cone constant. 15-30-45-60-75-90 degrees give you great measurement resolution. aRTA software is the best one to measure with imo.
I designed a e way system and a closed subwoofer 2.1 music system. My mid base driver freequency is 60Hz and port tuned for 40 Hz is it right way to tune the port? I adjusted sub pre amp filter to get li ear response. Is it enough? Left right speakers roll off T 60 Hz and have a small peak at the box tune freequency of 40 Hz
that bump at around 4kHz will be hard to tackle, might be edge diffraction. i think you will have to produce some sawdust to iron that out. we will see.
An excellent assessment of a rarely covered topic and DIY audio. Thank you!
Thanks for the method.
Feel the pain of your room for music. A lot to deal with!
Indeed, eventually, random outcomes all revert to the mean, meaning that streaks eventually end. Understanding this is a key part of intelligent and rational investing.
Great video. Off axis response (especially horizontal) indeed is very important if the room is less than ideal. To improve this I'd advise a waveguide on the tweeter to match the directivity around the crossover frequency (unfortunately not an option for a finished build ofcourse). A waveguide actually has some additional benefits, greatly reducing edge diffraction and a smaller Z-offset between tweeter and midrange.
It's debatable whether "better" off-axis response improves the listening experience in an untreated room. Everyone says it now, giving it that "it must be true" label, but as far as I know, the evidence for it is thin. In fact there's rationale for more directive speakers in an untreated room, since there will be less direct reflections.
Likewise with "improving" a speaker by making the off-axis response more technically perfect - you likely won't actually hear a difference, unless there's a massive change.
Great video - thanks! Syncs up with the course perfectly
Excellent video
Going to guess you need a wave guide on the tweeter to control directivity to match the woofers better and allow lower crossover, as well as control some of those room reflections better to stop them hitting the walls and roof. Also maybe an active crossover with FIR filters to keep everything in phase in the crossover region. Don't know how far the couch is to the speakers so wave guide might beam to harshly, and not have enough distance to spread out to cover the whole seating area.
Hello, can you please tell me if you have updated your courses yet ?
The sound power (onaxis+offfaxis total) response is important. We want the offaxis response to fall off evenly, breakup modes in the offaxis response create a response into reflective surfaces that are different from the onaxis response and will affect tonality and staging. I normally just use an angle finder against the baffle and keep the distance to the center of the cone constant.
15-30-45-60-75-90 degrees give you great measurement resolution. aRTA software is the best one to measure with imo.
Nice
I designed a e way system and a closed subwoofer 2.1 music system. My mid base driver freequency is 60Hz and port tuned for 40 Hz is it right way to tune the port?
I adjusted sub pre amp filter to get li ear response. Is it enough?
Left right speakers roll off T 60 Hz and have a small peak at the box tune freequency of 40 Hz
Could you explain how open baffles works please ?
Holy cow Marius
that bump at around 4kHz will be hard to tackle, might be edge diffraction. i think you will have to produce some sawdust to iron that out. we will see.