I don´t know, im living in Uppsala län almost in the middle of Sweden 56 km from Stockholm.
Yes, you are so right TNT, and thank you for all your help 🙂
Was so strange yesterday, but all you nice kindly folks questions and recomended tests, made me to go over things.
And all that time it took, made me play the different drivers-combinations, so now i know more and "understand more" what topp 2 woofers and 2 bottom woofers "do"
Also what lower midrange "do" ( played almost 3 songs before i notice the connection had losen)
So 3 songs and did not "missed" the 2 not conected midranges hahaha.
Quite much air from the woofers ports when playing 90 dB +, and woofers movement are "bigger" then midranges but still move "controlled" (if you know what i mean)
Was yesterday very very close to "give up" and treat 1 Peerlees fls-0512 cone, whit a "lliquid plastic" i have, that have made the cone a little more "dull" and a few gram heavier.
Glad you folks commitment made me try more and test more!
Because cone treatment is irrevocably.
regards John
Given the size of Sweden, figured maybe you guys might be close enough and could get together maybe sort things out. This hobby is a great way to meet people with similar interests. Two heads are better than one, driving an hour or so to learn/teach can be a great time.
Probably a nice drive?
I used to regularily drive that far for fried chicken until Lee’s opened a store here.
dave
Hahaha incredible that you find it 🙂
I live in Bålsta (the red spot), along the long big lake called Mälaren.
TNT has yet to reveal his location, so guess not game to play, unless he's PMed you, which is fine, either way, just trying to break the ice.
It can be hard to describe what your hearing, then someone else hears it and puts it into perspective for you. It's great having instant feedback when we're listening to speakers at one of the gatherings we have. I drive 2.5hrs for the Parts Express deal and 3.5hrs to the Ft Wayne InDIYana meet. Well worth the time.
It can be hard to describe what your hearing, then someone else hears it and puts it into perspective for you. It's great having instant feedback when we're listening to speakers at one of the gatherings we have. I drive 2.5hrs for the Parts Express deal and 3.5hrs to the Ft Wayne InDIYana meet. Well worth the time.
I still test 2 different xovers, one for left speaker and unother on right speaker.
Left has a notch and other values, but the notch creates a little low impedance.
Both speakers measure good, so right speaker without notch seems to "also" work.
Only 2 order LP at the 4 working as "woofers"
And 2 order LP and HP at the 4 working as "midranges"
Crossed today at 2900-3150 hz
And midrange HP at ca 200 hz
Here you have left and right xovers
Attachments
Do a manual frequency sweep and listen to all frequencies , note down interferences, réflexions, parasitical, low and highs, beaming, etc then try to correlate what you hear with the microphone measurements
That helped me tremendously in xo
Sometimes 3rd order is required, in general try to xo when the driver has. A natural decay … your values seems right
That helped me tremendously in xo
Sometimes 3rd order is required, in general try to xo when the driver has. A natural decay … your values seems right
It´s simulation in VituaXcad2 with real measurements.
SPL trace used on actual measurements in pairs.
on 2 in bottom and 2 in the topp
lower 2 mids and higher 2, and tweeter.
So 5 different SPL and impedance curves.
About combing!
Have you read Brystons (James Tanner) volume 2 issue 2 from feb 2022 ?
A few things in "speaker building", make the expertise to have two completely different sides of opinion
I heard them all, and the most detailed are injection molded, Harbeth and EPOS have them only.
The other loudspeakers sound nice but they lose in the membrane many of the small impulses of the voice coil through deformation:
the surround pushes one ways after excursion and the voice coil sends the center of the cone out for a smaller high frequency detail, the membrane flexes or all the fibers deflects with result of 'shouting' and canceling of that information.
The bigger the driver the more this effect happens.
The other loudspeakers sound nice but they lose in the membrane many of the small impulses of the voice coil through deformation:
the surround pushes one ways after excursion and the voice coil sends the center of the cone out for a smaller high frequency detail, the membrane flexes or all the fibers deflects with result of 'shouting' and canceling of that information.
The bigger the driver the more this effect happens.
Infinity had a lot of injection molded cones .
IRS Epsilon, Sigma, Omega and Kappa-series and others.
Titan, alu and magnesium mixes, are said to be very stiff.