great to see high freq responses, thanks! if i where you i would have measured the responses from 0-30-60-90 degrees as a minimum to get a feel of the behavior, i think you are looking at too small a window
you have nice smooth rounded edges on the back, why did you not do them on the baffle where they really counts?
Ah, yes, I forgot to annotate. Those polars are 0-15-30-45.
TBH, I can't see that there would be any information I could use beyond 45 degrees. What are you expecting to see or detect?
As for the radius on the rear of the cabinet: it is purely for aesthetics and to cut the cabinet size down a bit. A roundover /radius is only useful or effective above a certain size and/or ratio to the baffle.
"If the edge has a radius of ¼ wavelength of the sound, then above this
frequency little to no diffraction will occur while below this frequency diffraction will
occur" - Geddes
This means to have a properly effective roundover I would need a radius of 43mm/2000hz for the baffle width (172mm) where the diffraction would occur.
Besides which, the diffaction happens above the crossover point and the horn tweeter doesn't even see the baffle edges
TBH, I can't see that there would be any information I could use beyond 45 degrees. What are you expecting to see or detect?
As for the radius on the rear of the cabinet: it is purely for aesthetics and to cut the cabinet size down a bit. A roundover /radius is only useful or effective above a certain size and/or ratio to the baffle.
"If the edge has a radius of ¼ wavelength of the sound, then above this
frequency little to no diffraction will occur while below this frequency diffraction will
occur" - Geddes
This means to have a properly effective roundover I would need a radius of 43mm/2000hz for the baffle width (172mm) where the diffraction would occur.
Besides which, the diffaction happens above the crossover point and the horn tweeter doesn't even see the baffle edges
They sound REALLY good. This driver is quite special and sounds much bigger than it looks and I am quite keen to try another co-ax, for sure.
I was listening to some music the other day and the phantom centre was really clear and all of a sudden there was a huge reverb tail from some percussion - they went from pin focussed to a global sphere of sound coming from beyond. It was quite a surprise.
There is no audible sign of the hashiness in the top octaves and the wider treble is really good for sitting at opposite ends of the sofa with my wife.
Thoroughly recommended driver!
I wish I could have some comparison for the Infineon amp boards. My main set up is a 3E TPA3251 four channel amp and it would be too much of a PITA to de-reig speakon connectors to do a swap around. However, I can't detect any issues from the amps during normal playback. I'd also recommend them.
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I think it has been known for some years that the quality of the power response for a loudspeaker do matters, check out spinorama graphs
Nice round overs do can be aesthetic, but having them on the back of the enclosure makes them less visible
Nice round overs do can be aesthetic, but having them on the back of the enclosure makes them less visible
Where´s the mash to go with them bangers?
I like the enclosure design, they look really nice.
Don´t let them in the living room for too long or you will have trouble sneaking a 10" in there after these slim beauties.
I like the enclosure design, they look really nice.
Don´t let them in the living room for too long or you will have trouble sneaking a 10" in there after these slim beauties.
grahamgraham- what are you running for speaker stands? Looks like some side mounted subs? Where are you crossing over to them?
Haha, joensd, think I'll have em with chips. Cheers and you're right. Wife has been gently warned of the other project!
Mordikai, they are some 8" SB Acoustics sealed subs that I haven't had on for a year now. The house we are in has paper thin walls and with the boundary loading I get from being against the wall they aren't needed. I have two pairs of these but they'll go in to the attic until we buy a house big enough to utilise them! They are rather discordant with the decor so I need to sort them out for the 10" project!
I have been enjoying a simple two way now for a year and I think for the forseable future that's how I'd like to keep it.
Mordikai, they are some 8" SB Acoustics sealed subs that I haven't had on for a year now. The house we are in has paper thin walls and with the boundary loading I get from being against the wall they aren't needed. I have two pairs of these but they'll go in to the attic until we buy a house big enough to utilise them! They are rather discordant with the decor so I need to sort them out for the 10" project!
I have been enjoying a simple two way now for a year and I think for the forseable future that's how I'd like to keep it.
Finished the grilles. TBH I'm not awfully happy with the look of the foam as I wasn't able to get a crisp edge. I ended up using a template cutter on the router table which I was surprised did as good as it did but it still isn't perfect. Intially I was worried the cutter would grab the foam and pull it in but I did a test run and it just flung it off fairly well.
Measurements show neglible disruption to FR.
At least I have the shape of the baffles to make a better grille later down the line if they ever come in to the house.
Measurements show neglible disruption to FR.
At least I have the shape of the baffles to make a better grille later down the line if they ever come in to the house.
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Really nice job! I have some Beta 8cx and compression drivers sitting unused. Maybe I need to make some 8in “bangers”. 🙂
@NeonDriver @xrk971 cheers guys!
Yeah, def get on the coax! After these I am a little bit obsessed and might be giving the Faital 10HX230 coax a go in the new year for indoors.
I finally got them in to my workshop on sunday and gave them a good testing out. Wow, these little drivers can reach some epic SPL levels. They ate Infected Mushrooms for breakfast and just laughed at The Prodigy. I came back in the house realising I need to be careful with my hearing out there.
They need EQing for the room which being a very reflective space is difficult. I did some measurements to take the bass ring out of the 3.5x3.5m room but not really sure how to deal with the top end. Maybe just do it by ear.
One overwhelming aspect I didn't really get the gravity of until they were in situ is that these drivers are several pay grades higher than the job they have been given. These drivers is art!
Yeah, def get on the coax! After these I am a little bit obsessed and might be giving the Faital 10HX230 coax a go in the new year for indoors.
I finally got them in to my workshop on sunday and gave them a good testing out. Wow, these little drivers can reach some epic SPL levels. They ate Infected Mushrooms for breakfast and just laughed at The Prodigy. I came back in the house realising I need to be careful with my hearing out there.
They need EQing for the room which being a very reflective space is difficult. I did some measurements to take the bass ring out of the 3.5x3.5m room but not really sure how to deal with the top end. Maybe just do it by ear.
One overwhelming aspect I didn't really get the gravity of until they were in situ is that these drivers are several pay grades higher than the job they have been given. These drivers is art!
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Nice shop! Those are really compact. I like how they turned out. They look very unassuming yet deliver them goods. Your guests to the workshop will be impressed I think. You should take some careful measurements I’ll help you with a passive XO if you want.
Been thinking for a few month to build Scott Hinson's design for a 5x HT system and just found this thread!
Very nice @grahamgraham They do look awesome and it seems the do sound very good! Congrats!
From a beginner POV, how is it possible that they sound good with a "uneven" FR? Is it because the HF highs and dips are not broad? After all these are USD$200 drivers
Also, do you think a passive radiator would be a better choice than the reflex port?
Very nice @grahamgraham They do look awesome and it seems the do sound very good! Congrats!
From a beginner POV, how is it possible that they sound good with a "uneven" FR? Is it because the HF highs and dips are not broad? After all these are USD$200 drivers
Also, do you think a passive radiator would be a better choice than the reflex port?
I have a pair of Sica 6 inch coaxes, they have the same issues in treble. However, I don't seem to miss/notice anything wrong. But personally, I would not attempt a passive x-over...
Congrats to a nicely executed project!! The step - shouldn't it be possible to merge the 2 peaks into one with the use of delay? 0,3ms delay for the tweet? Not sure one can hear it but hey, its there for grabs.. ;-)
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Hey!
Don't hesitate, these are amazing drivers!
I didn't look in to what Scott did for the crossover, I just measured them at 15 degrees and made a flat downwardish straight slope that had the best trade off with diffraction/beamwidth/hashiness taken in to account. The hash/peaks and troughs are generally only there when on axis which is the least likely listening position unless they're in a fixed listening spot. Even then you can tow them in or out to get thebest response.
However, I was watching or reading (can't remeber) an Audio Science Review on how to interpret speaker measurements. He was tlking about which peaks are more noticeable. I'd always assumed that low peaks or troughs were as noticeable as high but apparently we don't notice it so much in the treble. This gave me the push to ignore the choppy FR and just go in. Also, Scott is a trustworth designer and if he used them then, well, yanno.
If you are REALLY paying attention you can notice it when moving yourself around the speakers but in normal use it's totally not a factor. You do have to move around a lot though.
I think a passive radiator is an excellent idea as there is a fair bit of ringing from the port resonance. This, again, is marginal and not really a problem but if you want to tie up all ends then that is what I would do. I had to make mine front facing withports as they went on the shelf as pictured above but if I had a no cost domestic listening approach I think a PR would be perfect.