Rs180P/RS28F vs. small DC160 3 way

[jhollander]

I've never heard of using a distortion measurement to determine your box tuning. I suppose it possible with reduce cone movement at Fb. A nearfield FR or impedance sweep seems cleaner.

[filmslayer]

much happier ... the distortion i believe came from the tweet screen , it was the one that hit the ground after falling off the stand . i measured it but never thought to look at distortion ...

tweet axis 4ft , 1/12th smooth ...

[filmslayer]

i can hear the difference , there more low end now FR coming up .

[filmslayer]

Huh, where are you seeing that? The graph looks like in room response.

look at the THD at 2800 ... yeah FR is room response but even when i shot the measurement it said usable from -6db at 56hz .

i forgot the caulk , but just got done replacing the weatherstrip and longer screws for a better bite . getting ready now to shot another measurement .

[jhollander]

Huh, where are you seeing that? The graph looks like in room response.

[filmslayer]

the graph above is tell me i got a lil more work on this ! i was really disappointed seeing an f3 of 60hz ... i think i have an extremely leaky box . on the way home today i'm gonna get better weatherstrip , longer screws and some caulk . hopefully that will address the leaks and get me closer to the 40hz i was shooting for ... also i think i may have broke a solder joint loose when removing the XO from my surround , that peak in distortion at 2800 should not be there ...

[filmslayer]

tweet axis from 4ft , 1/12 smooth ...

[filmslayer]

first track up sounds really nice ...

[filmslayer]

Phew !!! getting measuring gear out now ...

[filmslayer]

a few more things of note . i thought i had some 1/4" weatherstripping , i do not . think i'm gonna cut this 1/2" in half . i also just realized i forgot to order binding posts ...

[filmslayer]

Just curious, how do plan to cut the slot. I've never done. The first thing that comes to mine is: small rough in the baffle, mount the baffle, then an appropriate router bit's bearing using the enclosures slot to guide the finished baffle cut.

well i still couldn't find find my jig saw and all my router bits except the ones in my routers are in a tool bag at work . UHG !!! so i laid it out in pencil and free handed it with a double flute bit . it got the job done though i don'tr recommend it and will have a better way when i do the two 3 way baffles . i am really glad this is just a test baffle as i've learned a few things for when i do the 3 way s ... i'm now moving indoors for the rest ...

[filmslayer]

just for clarification guys i'm only gonna build one 2 way RS180P/28F , i've already designed this speaker as a surround and they are fantastic as i meant them to be , on wall sealed no extension . i have six 8's and two 12's producing low end in my system . i just wanted to see if i can make these better while i also make a small 3 way witch will replace the ONS that i currently run with my boombox . all really learning and more experience for this noob .... after i figure it out sonically , i will then turn my attentions on how to finish a speaker, cause as of now i barely have a clue ....

[filmslayer]

so nice to have a good reference speaker to listen to when in the middle of a build . if i've nothing else right the " Paper Towers " rock !!!!

[filmslayer]

Drill a hole then spiral flush cut bottom bearing router bit. If you are good with a jigsaw you can do a rough cut then finish with a traditional flush cutting bit. Add a round over and you are done...

was planning a 1/2" roundover when done and why i liked drilling the corners . i'm spent and have started with the adult beverages so no more power tools !!!! i'l get the 2 way done tomorrow for a listen and the 3 way parts i'm waiting on are scheduled for tuesday delivery ....

[jhollander]

Drill a hole then spiral flush cut bottom bearing router bit. If you are good with a jigsaw you can do a rough cut then finish with a traditional flush cutting bit. Add a round over and you are done...