ADA Depot - A Forum To Support Users of ADA Amplification Gear
ADA Preamps => MP-2 => Topic started by: Kim on February 12, 2016, 06:28:56 PM
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Anyone know what the Lo, Mid, Hi, and Pres EQ frequencies are in the MP-2 Tone Controls? The manual I have doesn't say.....
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According to this (http://web.archive.org/web/20040422213430/http://adadepot.com/adagear/gearpages/preamps/ADA-MP-2.htm) Q and centre freq move around depending on voice.
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Well that's no help then. ;) But thanks for reminding me of that info. I guess I just wanted to know how the frequencies of the Tone Controls get on with the listed Graphic EQ frequencies. Seems silly that they might feature the same frequencies as each other (if indeed they do)
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The MP-2 (and also the classic) have 2 different tone controls depending on the voicing you choose.One is for clean sounds and one for the dirty sounds.If you realy want i could try to calculate them?
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The MP-2 (and also the classic) have 2 different tone controls depending on the voicing you choose.One is for clean sounds and one for the dirty sounds.If you realy want i could try to calculate them?
If it's not too much trouble. I think it would be some helpful info to have available, especially for recording/mixing purposes. Thanks! :bow:
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The MP-2 (and also the classic) have 2 different tone controls depending on the voicing you choose.One is for clean sounds and one for the dirty sounds.If you realy want i could try to calculate them?
If it's not too much trouble. I think it would be some helpful info to have available, especially for recording/mixing purposes. Thanks! :bow:
+1 :thumb-up:
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For the dirty controls
Bass 80Hz
Mid 800Hz
Treble 3.5kHz
Presence 4kHz
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Thank you MJMP! Seems at least 800Hz is indeed shared by the Tone Control and Graphic EQ.
I became interested in this while setting up my MP-2 main presets into my QuadTube, and finding that what I hear and feel from my rig at rehearsal isn't the same as what is going on in my home studio. Obviously, there's a huge difference in volume and the speakers being used, so I may need to re-evaluate my home settings.
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No problem Kim,if you want i can also calculate the clean freq's?
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Sure! Then both info can be archived/sticky'd for future use. Thanks again! :bow:
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Hell Yeah! Great idea, Kimmer and THANKS to MJMP for figuring this out!
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OK :thumb-up:
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Kim,i did some more precise calculations voor the dirty tone controls
Bass; 74 Hz Q=0.8
Mid; 822 Hz Q=1.11
Treble; 3171 Hz Q=0.9
Presence; 3284 Hz Q=0.49
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Treble and Presence so close together???
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Yes they are,but you see a difference in the Q factor or bandwith of the filter.The Q factor of the presence is almost half of the Q factor of the treble which means the bandwith is almost double.
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^ indeed, which creates an interesting effect, with some common effect when adjusting treble and presence not too much, but at the same time, treble, with it's more narrow bandwidth, having a more sharply defined impact when up'ed more.
BTW, while this works just fine, there are times I would want treble at a touch lower frequency - which would be fairly to calculate.
..Seems at least 800Hz is indeed shared by the Tone Control and Graphic EQ..
In terms of frequency, yes; still two separate filters, though, each in it's own tonestack.
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Cleans
Bass; 76 Hz Q=0.53
Mid; 485 Hz Q=0.95
Treble; 4400 Hz Q=0.54
Presence; 6298 Hz Q=0.52
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Like Van says ,2 seperate filters with a different Q factor,the EQ points have a Q depending on the band between 4.2 and 4.5,so much smaller bandwith compared to the tonestack which is between 0.5 and 1 depending on the band.
So it's a 1/3 octave EQ (Q=4.36) if someone was wondering. ;D
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Hey MJMP, thank for the research :thumb-up:
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No problem ,i needed to clean up my transferfunctions on filters anyway :lol:
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^ you're not alone on this. Which literature are you using? - I need to reacquire books on these topics.
My old analog teacher wrote an excellent book on filters, but it's in Danish, so.. (IIRC: "Sådan bygges aktive filtre", by Jens Langvad)
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I'm using the holy bible of electronics; The art of electronics by Horowitz and Hill.Got all 3 editions. ::)