60 Degree DIY Mid Hi - AKA PM60

Stef Smits

Freshman
Apr 4, 2017
75
14
8
Looking great - did you manage to find a satisfactory product and method for glueing the foam to the grille? I have this little hurdle yet to overcome!

I use some black mesh (similar to TW-audio/LA etc) it sticks pretty good to the grills I've done.
 

Albe Kohler

New member
Nov 4, 2019
8
1
3
33
San Francisco
I decided to frankenstein an Altec Lansing horn to pretty much the PM90 design, changed it a bit to accommodate the horn better (it'll get some color soon...). It was a pain to attach it and even though it's partially in the way of the sound path of the 12", it doesn't seem to affect it audibly.
I still have to tune them, but boy do they sound good already.
IMG_0929.jpeg
 
  • Like
Reactions: Carl Klinkenborg

Chris Burns

Freshman
Nov 13, 2016
39
3
8
Connecticut
Need a bit of a refresh and confirmation.

If designing a MTM, the Mid/woofs edges of the cones need to be within is it one wavelength of each other to blend and not lobe or is it 1/2 wavelength at the highest crossover point to the Comp driver between them? I also dont remembe if its edge of driver cone to edge of driver cone or center of driver to center of driver measurement.

Sorry I know this is elementary but I just want to ensure Im correct in a project Im moving on.

Thanks again gang
 
Oct 25, 2018
88
10
8
59
Bideford, Devon. UK
Need a bit of a refresh and confirmation.

If designing a MTM, the Mid/woofs edges of the cones need to be within is it one wavelength of each other to blend and not lobe or is it 1/2 wavelength at the highest crossover point to the Comp driver between them? I also dont remembe if its edge of driver cone to edge of driver cone or center of driver to center of driver measurement.

Sorry I know this is elementary but I just want to ensure Im correct in a project Im moving on.

Thanks again gang
Opinion seems to vary between a quarter and a whole wavelength centre-to-centre! I would not go more than half a wavelength.
 

Jan Jaap Derksen

New member
Jul 9, 2020
9
7
3
43
Holland
Hi guys,

After long time i started again with the PM60 this week. The gole is to finish the speakers this week. Here are some pics of the building progress. I always fist make a mold witch i use for the router to copy the lines. The design is for the B&C DCX464. i made the cabinet 20mm higher. And i did some additional but i wonder who it will see......
 

Attachments

  • IMG_20201215_123459.jpg
    IMG_20201215_123459.jpg
    1.4 MB · Views: 38
  • IMG_20201216_120950.jpg
    IMG_20201216_120950.jpg
    1.7 MB · Views: 39
  • IMG_20201216_150638.jpg
    IMG_20201216_150638.jpg
    4.2 MB · Views: 37
  • IMG_20201216_185333.jpg
    IMG_20201216_185333.jpg
    4.3 MB · Views: 34
  • IMG_20201216_185344.jpg
    IMG_20201216_185344.jpg
    1.4 MB · Views: 38
  • IMG_20201216_205317.jpg
    IMG_20201216_205317.jpg
    1.4 MB · Views: 37

Jan Jaap Derksen

New member
Jul 9, 2020
9
7
3
43
Holland
Hi guys. Due to the Covid lock down in our country i was not able to finalize the cabinets till now. Also a proper test i could not yet do.
As you can see i build 2 cabinets with fully intergraded pascal xpro-2 amp (i bought this amp before i chanched over to the DCX464 :cry: otherwise it would be the xpro-3)and an additional dsp sound board with FIR filtering. Analog input and AES . I extend the cabinet at the back with 35mm to fit in all stuff.1609327088422.png

The speakers are B&C 12NDL76 16 ohm each and put these paralel to each other. I chose 16ohm to use the maximum power of the amp into the speakers and as you can see at the pictures i have made at the back side a speakon output for second slave cabinet. (to build in the futhure)
The B&C dcx464 i made a passive crossover at 4000hz. The exact weight of the cabinet is at the moment 38.89kg. This is pretty heavy but not as bad as i thought it will be.
 

Attachments

  • 1024-1365.jpg
    1024-1365.jpg
    82 KB · Views: 68
  • 2048-1518-max.jpg
    2048-1518-max.jpg
    209 KB · Views: 70
Last edited:
Jan 15, 2011
342
5
18
Hi guys. Due to the Covid lock down in our country i was not able to finalize the cabinets till now. Also a proper test i could not yet do.
As you can see i build 2 cabinets with fully intergraded pascal xpro-2 amp (i bought this amp before i chanched over to the DCX464 :cry: otherwise it would be the xpro-3)and an additional dsp sound board with FIR filtering. Analog input and AES . I extend the cabinet at the back with 35mm to fit in all stuff.View attachment 209387

The speakers are B&C 12NDL76 16 ohm each and put these paralel to each other. I chose 16ohm to use the maximum power of the amp into the speakers and as you can see at the pictures i have made at the back side a speakon output for second slave cabinet. (to build in the futhure)
The B&C dcx464 i made a passive crossover at 4000hz. The exact weight of the cabinet is at the moment 38.89kg. This is pretty heavy but not as bad as i thought it will be.

Dude do you have a huge snake in your backyard?


 
  • Like
Reactions: Max Warasila