Those of you that use two instruments on one amp..

Walter Woods!!!! It's one of the few amps out there that I know of that has two channels with complete, identical tone controls. The amp sounds great with fretted electric and very good with acoustic bass guitar or upright.

They are a little pricey but they are worth it... very small and powerul (the Ultra is 1200 RMS into 4ohms and only about 7 pounds).

I hear that the Acoustic Image company is thinking about putting out a two channel amp with identical inputs soon (the two channel they have now has an instrument channel and a 'mike' channel at the moment.

 

My Green Audio preamp has two independent channels, one with parametric, the other with graphic EQ (both with additional shape switch), I can use either channel A or B, but also A+B simultaneously.

 

You could try a Radial Bassbone. I have one, it's great! Although, I use it w/a passive bass and an active bass using different eq and vol settings. I believe it could be applicable w/an upright as well.

check it out:
http://www.tonebone.com/tbone-bassbone.htm

 

Alembic's F2B preamp has 2 separate inputs with separate volume and tone controls.

 

I generally won't use 2 basses on a gig. If I do, there's a good chance on is active, so I set the amp for the passive bass and then use the onboard preamp on the active to make adjustments.

Actually, with the Eden preamp, it usually only takes a click or two of one control to clear things up.

 

If I use a head, then the Walter Woods is the clear choice for doubling. But when I use a rack rig that has a preamp with parametric EQ, I can normally dedicate one band to "feedback control" and just crank that one knob when I switch instruments. Also, if I have the rack rig, I use a Raven Labs MDB-1 to mix levels and mute the unused instrument.

Hope this helps, Tom.

 

I use an Eden WT-800 thru an Avatar 210 Pro and SB112. Each 8 ohm speaker uses one side of the amp. I also utilize a Raven MBD-1 to balance the input signal between my Azola Bug II, a fretted, and a fretless.

For my electric basses, I have my EQ set to the room and tend to lean my blend a little towards the 210 cab. When utilizing the Azlola, I roll the treble from 2:00 to 9:00 and set the blend to about 75% SB112.

The MBD-1 has its XLR out running to the main house, but my amp usually provides about 80% of the house mix in the places I usually play. Because I supply such a large amount of the house mix volume, my EQ settings don't necessarily sound the best in my playing position, and are instead set for the overall house mix.

R

 

I have also used the Radial Bassbone with great success. Works well and has a good builtin DI.

 

The way I deal with this......

Option A: Fishman Pro Platinum EQ run into the effects return for a second channel. The Fishman runs about $170 or so.

Option B: Run one instrument flat and depress the bypass EQ button on my head, then use the EQ for the other.

 

you should check out a sansamp programmable bass preamp, it has three programable channels, about 199.00

 

It seems to me an inexpensive way to do it would be with a pedal EQ. Set the amp EQ to one bass and make the EQ and level adjustments for another bass with the pedal.

I hope that made sense. I'm gonna go space out now!

 

Yup.

 

I use an ampeg SVP-Pro which has a switchable graphic EQ (including a level control). Set the basic sound for one bass and the basic sound + graphic for the other.

 

If you're not buying a new amp and your budget is limited, this is your best option. Keep it off for bass #1, and set it to sound good for bass #2. There are a ton of eq pedals out there, you should be able to get a decent one for $50. I used to use the Trace Elliot 7 eq pedal and it sounded great.

Either that or memorize the exact amp eq changes you want to make and practice making them quickly. Or pay a roadie to do that . . .