Double Bass Mo Mark Acoustic Bass

[Ric Vice]

Wouldn't it be nice if Markbass designed modules for the Mo Mark system could be used with the Double Bass. Since it's modular it would seem like you could built a pre amp with all the bells and whistles. Sounds like a good idea to me.

Ric

 

[AMJBASS]

That sir, is a very good idea. I wasn't too intrigued by the design as it seems kind of gimicky to me, but if you could have a preamp modual that is designed for Double Bass it would be a pretty versatile and valuable setup for a gigging bassist.

 

[Don Sibley]

Yeah, you could start with this:

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[Jaromir]

Unfortunatelly, with Markbass you can choose whatever you want, but you always end up with 500Kohm input impedance. Even in their so called acoustic combos!
So far I did'n pay much attention to this, because with the Realist I'm using the sound through my Mini CMD 121P was always very good. However, last night at one of Prague jazzclubs I wasn't quite happy with my sound, so I tried to help it with my Fdeck little device. The difference was huge! It was so much better, I was really surprised.
So even with Realist I guess 500Kohm is not enough. I've heard somewhere that input impedance at around 2Mohm is sufficient for most pickups. This is what I would be expecting to see at "acoustic" amp.

 

[Don Sibley]

I need to order an Fdeck anyway.

 

[Ric Vice]

Unfortunatelly, with Markbass you can choose whatever you want, but you always end up with 500Kohm input impedance. Even in their so called acoustic combos!
So far I did'n pay much attention to this, because with the Realist I'm using the sound through my Mini CMD 121P was always very good. However, last night at one of Prague jazzclubs I wasn't quite happy with my sound, so I tried to help it with my Fdeck little device. The difference was huge! It was so much better, I was really surprised.
So even with Realist I guess 500Kohm is not enough. I've heard somewhere that input impedance at around 2Mohm is sufficient for most pickups. This is what I would be expecting to see at "acoustic" amp.

+1 That's the Markbass paradox isn't it? For whatever reason, they don't seem receptive to raising the input impedance on any of their bass amps with the exception of the Mark Acoustic. Walter Woods and Gallien Krueger figured this out over twenty years ago. Walter took Don Underwood's pickup and matched the input impedance with his amps so they have had a 1 megohm inputs for quite some time. I like the compromise between 1 megohm and 10 that the Phil Jones Bass amps have.

 

[Jaromir]

That's the Markbass paradox isn't it? For whatever reason, they don't seem receptive to raising the input impedance on any of their bass amps with the exception of the Mark Acoustic.

Unfortunatelly INCLUDING the Mark Acoustic. I have checked that with Markbass and they confirmed that both inputs at the Mark Acoustic amp and combos have 500Kohm input.

 

[Dudie]

Unfortunatelly INCLUDING the Mark Acoustic. I have checked that with Markbass and they confirmed that both inputs at the Mark Acoustic amp and combos have 500Kohm input.

Strange. That cant be true!

I have the AC 121 and there is a Big difference between the two inputs. I can go directly without preamp with my K&K bassmax and get a warm nice sound. With my littlemark 2 i always use a preamp.

 

[Ric Vice]

Strange. That cant be true!

I have the AC 121 and there is a Big difference between the two inputs. I can go directly without preamp with my K&K bassmax and get a warm nice sound. With my littlemark 2 i always use a preamp.

Here are the specs for the AC 250 head that's used in the AC 121

INPUTS
CHANNEL 1
impedance 500 Kohm, max. voltage 10 Vpp
CHANNEL 2
impedance 500 Kohm, max. voltage 10 Vpp
BALANCED CHANNEL 2
impedance 500 Kohm, max. voltage 20 Vpp
INSERT POINT
impedance 10 Kohm, max. voltage 20 Vpp

I do know that there are quite a few players on TB that love this
amp.

Ric

 

[meRTKendrew]

they do have a preamp module for acoustic instruments?

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-RTK