Yeah got a guy coming round on Saturday to help me look at room treatment as my room does love to gain on the low end and a lot aswell I think naturally I’m 10db up at 15hz when compared to 200hz. It mainly the highs I want him for though as they just seem to start dying off at 5khz and are like 10db at 20khz when compared to 5khz.

Yeah as the port does add around 3db on average to a note it tuned to thus helping you get a natural harman curve in your room. However when you got two 18s and two 21s in the making porting them just ain’t a option, the box would be humongous and the port would be way too long to make sure it plays low enough as from my understanding you don’t want to play a ported speaker below it ports tune. I have to agree with an old saying “there truly is no replacement for displacement” sealed is always the way to go.

Ow never heard of them, thanks for the help I do some digging on them

Its why im thinking of switching to a full seperates systems usb interface/dac out via xlr to each speaker and subs power amp then on the pc I will have professional mixing software so I can set the db/octave myself as I don’t think any avr/amp company is using anywhere near enough aggression on the slopes it needs be like a 36db octave and they using an 8 or 12 so it isn’t low enough by the time it reaches the lower hz thus causing it to produce the noise all be quieter but it still there and it doesn’t sound nice thus sealed seems like the only logical choice now

Ow they are integrated properly you under estimate how long I been working on this. This ie over a decade in the making gone from yamaha to denon and back yo yamaha, I’ve purchased countless speakers and subs but never had want I am looking for. Until you have heard an all sealed system it is impossible to know the benefits they hold over ported. Ported, transmission line and passive radiators are all dirty due to group delay transmission has the lowest of three and passive radiators are the worst. I also have never heard a pair of ported speakers that a manufacturer makes that doesn’t cuff when you turn it up so unless I want to listen quite ports are not the answer they are a curse of the speaker industry.

The minidsp and avr both have the necessary high/low pass filters on the issue is they are still audible at the port even though they shouldn’t be. If I move the crossover higher, the subs are then playing too high in the bass so it shouts even with room correction and additional dsp which is not ideal as the bass will come out too loud. I have them eq’d and am looking at moving over to fir soon as learning eqing is not ideal so for phase alignment.

From my understanding it is possible to align them but it is very challenging as not only is the group delay for ports through the roof, it is the measurement mic cant tell what is the port and what is the speaker so you can’t accurately align the phase.

I know tell me about it, the thing is though it is the best sounding it is always very clean when sealed whereas the rest are dirty to my ears

Yeah I’ve got a minidsp and got crossovers set high at 120hz on the avr but looking at moving over to a simpler (to me) setup one day so the crossovers will be managed by a usb interface of a multi channel dac. This is because I’ve spent the past year building and tweaking the perfect pc for digital audio and multimedia playback. Only bits left to add to it is a jcat or similar usb audio card then feed it out with a ifi 2-1 usb a to usb b cable into either the interface or dac. Preferably interface at the moment as that gives me full dsp, delay, fir, etc. control over each channel individually and then each channel can be fed an xlr cable.