I just did this to my HB Mm85a and I have to say I didnt get any drop in volume (compared to active mode with pots centred). I taped up put the high boost/cut pot and put it at the back of the cavity. I put the active passive switch where the high pot was on the control plate. (I didn't want to drill holes or modify the body until I heard what it sounded like) Thank you for giving me the confidence to try this mod 🤘
Nice :) I have this Bass too, really enjoying it. I think I would rather get rid of the Volume Pot than having this switch at the back. Or better yet, enlarge the cavity to have the Push/Pull ;)
That's just an experiment. =) I wanted to try this bass in passive mode and I think I like it more than active one. Now I plan to remove preamp and boom - there are three slots for all kinds of switches free! Well, at least two, because I'm gonna add tone knob.
@@silvansky It's always fun to experiment :) I tried one of these very cheap 3-band pre-amp from Aliexpress on my other Harley Benton, the PB-20 SBK, and made a very special (and weird) pickguard with 4 pots + 1 jack 😂 Then I removed that really bad pre-amp for a simple set of EMG P active ones ;) I'm quite pleased with the sound of the MM-85A, maybe just a bit too dark , but I use that aspect for specific songs and styles. If anything, I'm just a bit annoyed by the lack of noise canceling when having these humbuckers in Jazz Bass mode ; split. Can't really mess around with expensive instruments, so ...
Hi, could you tell me how to recognize input and output wires going out of preamp? Which ones? I also thought about making passive electronic conversion, does anyone Has some diagram how should it look like?
I just followed all the wires from the preamp to their origin and found what I needed. Two wires for each EQ pot, ground, in and out. As far as I remember, the output goes to volume pot. To make a total passive conversion you need to remove the preamp and three EQ pots, add one tone pot and wire it with a regular vol/tone diagram.
The main difference is in signal level. Unless you change eq settings in active mode. :) And the other thing is that preamp catches radio in my flat. See my latest video: when I turn it off, radio disappears.
Because the cavity is too small and contains too much wires and it would be too hard to add the switch to the metal panel. And push-pull does not fit to the cavity.
I just did this to my HB Mm85a and I have to say I didnt get any drop in volume (compared to active mode with pots centred).
I taped up put the high boost/cut pot and put it at the back of the cavity. I put the active passive switch where the high pot was on the control plate. (I didn't want to drill holes or modify the body until I heard what it sounded like)
Thank you for giving me the confidence to try this mod 🤘
Great! As for my bass, I didn't use active mod for about year and even want to get rid of the preamp and add a regular tone pot.
@@silvansky it still sounds brilliant without the preamp 👍
I use multi effects pedals and use a tone control on there 🤘
@@shaunstephen9761 I also use lots of FX on bass, but I love to have tone control available under my hand. Use it very often on my guitars. =)
Nice :)
I have this Bass too, really enjoying it.
I think I would rather get rid of the Volume Pot than having this switch at the back. Or better yet, enlarge the cavity to have the Push/Pull ;)
That's just an experiment. =)
I wanted to try this bass in passive mode and I think I like it more than active one. Now I plan to remove preamp and boom - there are three slots for all kinds of switches free! Well, at least two, because I'm gonna add tone knob.
@@silvansky It's always fun to experiment :)
I tried one of these very cheap 3-band pre-amp from Aliexpress on my other Harley Benton, the PB-20 SBK, and made a very special (and weird) pickguard with 4 pots + 1 jack 😂
Then I removed that really bad pre-amp for a simple set of EMG P active ones ;)
I'm quite pleased with the sound of the MM-85A, maybe just a bit too dark , but I use that aspect for specific songs and styles.
If anything, I'm just a bit annoyed by the lack of noise canceling when having these humbuckers in Jazz Bass mode ; split.
Can't really mess around with expensive instruments, so ...
Hi, could you tell me how to recognize input and output wires going out of preamp? Which ones?
I also thought about making passive electronic conversion, does anyone Has some diagram how should it look like?
I just followed all the wires from the preamp to their origin and found what I needed. Two wires for each EQ pot, ground, in and out. As far as I remember, the output goes to volume pot.
To make a total passive conversion you need to remove the preamp and three EQ pots, add one tone pot and wire it with a regular vol/tone diagram.
Thx boss
Ur welcome
What kind of switch did you buy ?
DPDT on-off switch.
I can't tell the difference between active and passive mode.
The main difference is in signal level. Unless you change eq settings in active mode. :)
And the other thing is that preamp catches radio in my flat. See my latest video: when I turn it off, radio disappears.
Why is that huge switch on the back?
Because the cavity is too small and contains too much wires and it would be too hard to add the switch to the metal panel. And push-pull does not fit to the cavity.