[Odougbo]

I cut them best I could - stacked them in vice and belt sanded the sides of them.

prototypes take forever......but whats the rush anywaylddude:

 

[robbo266317]

I know what you mean, my belt sander weighs over 1kg and really is tedious to use that way.
These days I make one thin, ie 8 - 10 mm, mdf template and then use a router with a straight edge bit with ball bearing wheel to shape the rest.

 

[Odougbo]

Ohhhh you're going to need one of these then!

Best router bit for speakers builders - top and bottom bearings!

http://www.amanatool.com/routerbits/down-shear-trimmer-47094.html

 

[Odougbo]

Moo Cow

Hey not bad...... The bass is back. I like the sound of the reverse tweeter.

The Morels are smother, still getting a bit of a shout now and then.

New to move them a room with some carpet.

I guess I could go back and slip in a 15w L-pad, while I wait for some extra parts.

 

[Odougbo]

Now I did use my router the other day.

Extra bonus points if you can tell me what is inside the bases? :dontknow:

I know what you mean, my belt sander weighs over 1kg and really is tedious to use that way.
These days I make one thin, ie 8 - 10 mm, mdf template and then use a router with a straight edge bit with ball bearing wheel to shape the rest.

View attachment 39653

 

[robbo266317]

Bees, I'm guessing it's Bees....

 

[Odougbo]

Bees? :yikes:

When you have wood - thats what you use.

 

[robbo266317]

Very nice!

Not much room for the honeycomb though! :scratch:

 

[Odougbo]

Where to start...maybe with new glasses :rubeyes: I put a 9R instead of .9 in the L-pad.

I'm on it!!!

 

[Odougbo]

Okay better - I even made sure the tweeter coil & woofer coil are the same (8.3ohm)
Tweeter 18g/Woofer 14g

The woofer is not going down without a fight - which I expected. I.e. it is competing with the Tweeter above 2200hz. (4,000 I can't hear the woofer at all)

I could order new tweeters...just so many out there. Maybe one closer to 89db - 90db.

 

[robbo266317]

The woofer is not going down without a fight - which I expected. I.e. it is competing with the Tweeter above 2200hz. (4,000 I can't hear the woofer at all)

I could order new tweeters...just so many out there. Maybe one closer to 89db - 90db.

Do you have access to a SPL meter or REW?

REW makes it easy to measure the difference in levels between the two drivers, then just calculate the value needed for the L Pad circuit.

 

[Odougbo]

Lent my SPL to a buddy - few years later he showed me his meter :yikes:

Friends NEVER LEND TOOLS - NEVER LEND TOOLS WITHOUT YOUR NAME...:nono:

I'm sure I can pad the tweeter down, this is not Odougbo's first rodeo :rofl:

I think - - - I need help with xo point and/or phase issues.

The Morel are known for mid range, it has 1,500 printed right on the back. I wouldn't mind trying something new.

 

[Odougbo]

:help:

 

[robbo266317]

That looks pretty good frequency wise.

It looks like it is tuned to 65 Hz. The rise in impedance at that point is typical for a tuned enclosure.
You could add a Zobel network to reduce the impedance at the top end although it is not excessive.

 

[Odougbo]

I checked the woofer xo with clip lead (shunt) it does seem to work around 2,000+ :boxer:

The one morel had a buzz (which is not uncommon) - I had one left, that was clearer.

 

[Odougbo]

Cool inside Pic

 

[Odougbo]

There's some kind of overlap problem - the tweeter might just be going too low. In desperation I used a 6db L-pad which sounded best of all - but cymbals are starting to fade away.

I.e. the mid range is way too However the bass is really kicking!!!!

Trial & Error - maybe switch to bigger coil (1mH) and/or smaller cap.

 

[robbo266317]

The butterworth design has a slight rise at the crossover point. This could be causing your issues.
(Again, access to REW would confirm this. You could replace each speaker with an 8Ω resistor and then combine the two graphs.)

Alternatively, If you have the resources, a Linkwitz-Riley configuration is flat across the crossover region.

eg

 

[Odougbo]

Aye - just what I envisioned 4.uF and 1.15mH (x2)

This has been a lot of work but a good learning exercise. :run2::run:

This is much better...whew.

 

[Odougbo]

Removed.