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Alembic Club » Dreaming... for now » Archive through January 13, 2009 » F-2B plus Keyboard equals ?!?! « Previous Next »

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sacredheartattack
New
Username: sacredheartattack

Post Number: 5
Registered: 1-2009
Posted on Wednesday, January 07, 2009 - 7:28 am:   Edit Post

So I am toiling with using a keyboard with my bass rig. I would use channel 1 of my F-2B for my Jazz Bass, and channel 2 for the keyboard (for synth parts) with the mix output going to my amp.
I have heard two things that I can not really confirm as of right now and maybe someone here knows a bit more about it...

1. The output of the F-2B is a bit hotter than typical line level. Anyone know the specifics of that output? (i.e. dbv, impedance, etc.)

2. I also understand that most keyboards are too damn hot for the pre's input. Is this also true? I figure a line level db pad would be appropriate, but again I would need to know numbers for the unit. Input impedance and level and all that fun stuff...

Any help would be GREATLY appreciated! I really want to use this thing to it's full potential, and being the mad scientist I like to pretend I am these pieces of info will help me.
mica
Moderator
Username: mica

Post Number: 5750
Registered: 6-2000
Posted on Wednesday, January 07, 2009 - 12:52 pm:   Edit Post

F-2B output level is line level 1 V RMS.
Output impedance: A&B=<40K, mono=<50K
Input sensitivity: #1=5mV RMS, #2=10mV RMS
Input impedance: #1=1 Meg, #2=136 K
sacredheartattack
New
Username: sacredheartattack

Post Number: 6
Registered: 1-2009
Posted on Thursday, January 08, 2009 - 7:01 am:   Edit Post

Hey THANKYOU!!!! Each input is different?! Crazy! Why is that? Also keep in mind this F-2B is like 40+ years old. I will get a serial number off of it later to find out when it was made.
davehouck
Moderator
Username: davehouck

Post Number: 7334
Registered: 5-2002
Posted on Tuesday, January 13, 2009 - 11:39 am:   Edit Post

Each channel has two inputs. Mica's information refers to input 1 and input 2 on each channel.
davehouck
Moderator
Username: davehouck

Post Number: 7335
Registered: 5-2002
Posted on Tuesday, January 13, 2009 - 11:42 am:   Edit Post

Also, from the F-2B page; "Plugging into Jack 1 alone gives full sensitivity, while Jack 2 alone is attenuated 6 dB."

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