This combination of drivers are so well behaved together (flat in respective passbands) that the only EQ I have applied is to roll off the bass on the SB20PFC30-4's [image ^] and then applied SPL Levels and XO's by ear.
Next I will start taking mic measurements . . . and to see what my curve looks like right now.
When I had the ports out and had a 4" dia hole in there just to see what it sounded like, I put my hand inside and reached around and grabbed the magnet on the SB20PFC30 while the SPL was kinda high and the sheer violence of thrashing around gave me a whole new perspective concerning these little electrical motors we call speakers and the fact that plastic does flex - a LOT.
Now I understand why I have yet to see any larger than 8" woofer/sub-woofer drivers made of plastic. YET.
The cabinet is rock solid under all that stress due to the short distances between unsupported/un-braced MDF material.
Cabinets are heavy too - I am really feeling how old I am getting as I add the baffles, and drivers and moving them around.
OK, these speakers have some hours on them now and they are really starting to come together - literally.
The off axis listening position is now much wider than it was to begin with and instead of each driver sounding localized regardless of Listening Position [LP] I can stand near-field and midfield and they sound well integrated.
for a while, I thought this was going to be a failure combo of drivers but that isn't the case at all.
The bass is articulate but lacks what a 10" sub will bring to the mix and is exactly what I wanted so that is great.
The 2" mid dome and ribbon tweeter are no longer harsh, just well defined now - nothing stands-out.
I tweaked the XO's and pushed the 2" dome lower than I thought I could get away with but it is taking it like a champ.
I may want to try for passives so I can put these where they belong in my little living room and move along to other projects.
Friend from VA showed up today and I showed him these speakers/DSP/Amp combo and he kept looking behind the mains for a subwoofer. He was very interested in the tweeters as they were so clean sounding to him.
I must admit they are getting better all the time with more exercise/play time.
He asked me if I was interested in building some custom speakers for and assisting on a multimillion $ audio set-up for a .gov client he has a contract to manage.
I told him I was too small time for that but I know "some people" - send me the contract specs.
He said there was nothing in the performance of these speakers to lead him to believe I wasn't capable of delivering.
Those SB20PFC30-4's are the sh*t now - so tight and punchy with nice deep bass and zero muddiness.
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This combination of drivers are so well behaved together (flat in respective passbands) that the only EQ I have applied is to roll off the bass on the SB20PFC30-4's [image ^] and then applied SPL Levels and XO's by ear.
Next I will start taking mic measurements . . . and to see what my curve looks like right now.
Sweet!
very nice build, and all active (x the tw protector cap, which is probably a good move)
source for your twisted (triple) wire? thx
Thanks guys!
These baffles are just for testing - I'll make something nicer once I decide which drivers will remain in this cabinet.
It isn't twisted but it is appropos for Alabama - its, "Trailer Wire".
High-end stuff, too - OFC/Tinned 16 AWG
https://www.amazon.com/dp/B0B943FX4V?ref=ppx_yo2ov_dt_b_product_details&th=1
Just a side note here I thought I would share:
When I had the ports out and had a 4" dia hole in there just to see what it sounded like, I put my hand inside and reached around and grabbed the magnet on the SB20PFC30 while the SPL was kinda high and the sheer violence of thrashing around gave me a whole new perspective concerning these little electrical motors we call speakers and the fact that plastic does flex - a LOT.
Now I understand why I have yet to see any larger than 8" woofer/sub-woofer drivers made of plastic. YET.
The cabinet is rock solid under all that stress due to the short distances between unsupported/un-braced MDF material.
Cabinets are heavy too - I am really feeling how old I am getting as I add the baffles, and drivers and moving them around.
OK, these speakers have some hours on them now and they are really starting to come together - literally.
The off axis listening position is now much wider than it was to begin with and instead of each driver sounding localized regardless of Listening Position [LP] I can stand near-field and midfield and they sound well integrated.
for a while, I thought this was going to be a failure combo of drivers but that isn't the case at all.
The bass is articulate but lacks what a 10" sub will bring to the mix and is exactly what I wanted so that is great.
The 2" mid dome and ribbon tweeter are no longer harsh, just well defined now - nothing stands-out.
I tweaked the XO's and pushed the 2" dome lower than I thought I could get away with but it is taking it like a champ.
I may want to try for passives so I can put these where they belong in my little living room and move along to other projects.
Friend from VA showed up today and I showed him these speakers/DSP/Amp combo and he kept looking behind the mains for a subwoofer. He was very interested in the tweeters as they were so clean sounding to him.
I must admit they are getting better all the time with more exercise/play time.
He asked me if I was interested in building some custom speakers for and assisting on a multimillion $ audio set-up for a .gov client he has a contract to manage.
I told him I was too small time for that but I know "some people" - send me the contract specs.
He said there was nothing in the performance of these speakers to lead him to believe I wasn't capable of delivering.
Those SB20PFC30-4's are the sh*t now - so tight and punchy with nice deep bass and zero muddiness.
nice attention to detail throughout your build
Most gracious of you, tajanes.
Mid Dome crossed at 500 Hz to the woofer and mid to tweeter at 3.6KHz with minor shaping of XO slopes.
Snare, bongos & tympani have just the right amount of snap to them.