CBS AudiMAX II in the sick bay

[Link555]

I finally hooked the unit up to my PC and sent it some audio at the proper level ...and the meter is behaving itself now. I added a h attenuator with 294 ohm resistors and 500 ohm trim pot. This will live inside the unit.

I cut the xlr and trs mounting plate and primed it.

All and all it is starting to come together. I am thinking I will leave the output knob, it allows you drive the unit to go into early saturation if you like... kind of useful.

 

[Link555]

Rev 4 of the schematic ...

 

[Link555]

@audiokid does the PDF link above work you? It does not work on my iPhone or iPad...it asks if you want to download then immediately quits.

 

[Kurt Foster]

i tried it and it worked.

 

[Boswell]

It's OK for me on a W7 PC running Firefox - a single click on your icon brings up Adobe Reader with the schematic. With W10 running Edge on both a different PC and on a Microsoft Surface Go II tablet, clicking the icon downloads the .pdf, then puts an invitation to click a confirmation at the bottom of the browser screen (half off the screen on the Go). Clicking that opens the .pdf schematic directly in Edge on both devices.

 

[Link555]

Apple set up issue on my end then, thanks

 

[Link555]

Ready for testing...

 

[Boswell]

That front panel looks really smart, Link! Not instantly recognisable from a distance as an Audimax II, though.

Mind you, I'd read about them but never seen even a picture of one until you posted photos of this unit in the state it was when it came in.

I hope the owner is duly appreciative of all the work you have put in.

 

[Kurt Foster]

Stellar work Link ..... (pun intended).

 

[Link555]

Thanks guys, and extra special thanks to Boswell! It’s amazing to have your input, it’s hard to express just how much it is appreciated. Thank you!

Just listening now... it’s a really cool piece... lots of attitude, but not over the top. Maybe I can convince the owner to post some sample clips.

 

[BobAnalogue57]

Thanks guys, and extra special thanks to Boswell! It’s amazing to have your input, it’s hard to express just how much it is appreciated. Thank you!

Just listening now... it’s a really cool piece... lots of attitude, but not over the top. Maybe I can convince the owner to post some sample clips.

Post away Link ... thanks !

 

[audiokid]

@audiokid does the PDF link above work you? It does not work on my iPhone or iPad...it asks if you want to download then immediately quits.

. I have to download it however but works on iphone as well.

 

[Davedog]

Thats a beauty!

 

[Link555]

Thanks Bob for your permission to post some clips, Here are some very random sound samples. I did not match levels or do any extra tweaking. I took a small snippet from a mono source and ran it through the CBS audimax rIIz three times with different settings. I tried to push the settings on the compressor to see what it could do. Normal cautionary notes, these clips are real musicians doing their thing. These aren't perfect performances, or even mixed. Its raw. The idea is to hear a bit of the compressor, not the performance. The Acu gtr, drums and bass come from a band called Signal and Sound, the vocal comes from Kola Collective.

The first sample is an acoustic guitar. Below is the source file:

Now Running that through the compressor with the settings as follows:
ACU GTR 1
Input 10
Attack 90
Threshold 0
Release 20
Output 100

ACU GTR 2
Input 100
Attack 100
Threshold 50
Release 10
Output 10

ACU GTR 3
Input 100
Attack 50
Threshold 30
Release 60
Output 30

 

[Link555]

Ok next let's try some bass, below is the source:

Bass 1
Input 10
Attack 90
Threshold 50
Release 50
Output 100

Bass 2
Input 20
Attack 90
Threshold 10
Release 10
Output 100

Bass 3
Input 20
Attack 20
Threshold 10
Release 10
Output 100

 

[Link555]

Now some single OverHead mic on a drum kit, here is the source:

OH 1
Input 10
Attack 20
Threshold 30
Release 15
Output 100

OH 2
Input 20
Attack 50
Threshold 0
Release 50
Output 100

OH 3
Input 100
Attack 50
Threshold 30
Release 60
Output 30

 

[Link555]

Lastly here is vocal with the bleed from a nylon string guitar, here is the source:

Vocal 1
Input 10
Attack 50
Threshold 50
Release 30
Output 100

Vocal 2
Input 50
Attack 20
Threshold 50
Release 70
Output 100

Vocal 3
Input 15
Attack 50
Threshold 30
Release 30
Output 100

 

[audiokid]

Thanks Bob for your permission to post some clips, Here are some very random sound samples. I did not match levels or do any extra tweaking. I took a small snippet from a mono source and ran it through the CBS audimax rIIz three times with different settings. I tried to push the settings on the compressor to see what it could do. Normal cautionary notes, these clips are real musicians doing their thing. These aren't perfect performances, or even mixed. Its raw. The idea is to hear a bit of the compressor, not the performance. The Acu gtr, drums and bass come from a band called Signal and Sound, the vocal comes from Kola Collective.

The first sample is an acoustic guitar. Below is the source file:
View attachment 20264
Now Running that through the compressor with the settings as follows:
ACU GTR 1
Input 10
Attack 90
Threshold 0
Release 20
Output 100
View attachment 20261
ACU GTR 2
Input 100
Attack 100
Threshold 50
Release 10
Output 10
View attachment 20262
ACU GTR 3
Input 100
Attack 50
Threshold 30
Release 60
Output 30
View attachment 20263

Nice, thanks for posting!

Re: acoustic guitar.

I think I prefer the last example the best as it sounds a bit more even to the strum and picking but of course this might change based on other instruments in a song.

 

[audiokid]

Ok next let's try some bass, below is the source:
View attachment 20268
Bass 1
Input 10
Attack 90
Threshold 50
Release 50
Output 100
View attachment 20265
Bass 2
Input 20
Attack 90
Threshold 10
Release 10
Output 100
View attachment 20266
Bass 3
Input 20
Attack 20
Threshold 10
Release 10
Output 100
View attachment 20267

Re Bass:
Much prefer the last one again as it have a better attack to my ears.

 

[Link555]

its a pretty useful compressor, a bit of a Swiss Army knife...it has a lot of range.