Replacing Bartolini MK-1 Pickups and Bartolini MK-1 EQ

First of all, the MK1 preamp doesn't have passive mode. The mini toggle switch on your A5 is only an EQ bypass switch. This explains why you would still need the battery despite you've put it on what you think as passive mode.

Second, there's nothing wrong with the MK1 pickups. They just have their own sound. But, since they are being used on so many basses as factory pickups, thus like many things in this world, they may sound good with some combinations but may not work with others. I agree that they could sound thin, at least on my old Cort Artisan A6, but they sounded good on my Ibanez SRF705 fretless. They even sounded better than USA Bartolini MK5CBC pickups that I have put on to replaced them on this specific bass.

Next, same thing on the MK1 pre... despite I also agree that it shouldn't be used on Cort Artisan A series, some might hear it as good sounding preamp. At least some like it when paired with USA Bartolini pickups.

I also had taken off the MK1 pickups and pre from my old A6 years ago and replaced them with USA Bartolini MK6CBC pickups and HR-5.2AP/918 pre, and used the mini switch hole to install a mini 3-way switch for coil switching feature of the MK6CBC pickups. These combination could produce thicker sound inherent with the MK6CBC due to its dual coil, with lots of other tonal options from the pre and the additional coil switch.

 

I have four basses with the MK1 Pickups. Replacing the preamp with a USA Bartolini improved the sound quite a bit. In one case, I also replaced the pickups with a Bartolini MK5CBC set. The improvement was minimal. I'd go for preamp first.

 

if you want thicker sound, then yes, the USA MK5CBCs would get you there. Since this means you are changing from MK1, which has split reverse-P coils inside, to MK5CBC, which consists of dual full blade coils. But will a pair of these MK5CBCs would fulfill your goal? Only you can judge.

More or less would be the same about Nordstrand, Aguilar, or any other available replacement pickups out there.

 

I don't have the USA Bartolini H.R-5.2AP/918 pre and the MK6CBCs installed anymore since I've sold my A6, although I still have them. They worked well together. I remember the HR-5.2AP/918 pre was transparent sounding with all EQ knobs centered compared to its passive mode (vol knob pulled).

TBH, I mostly use the onboard EQ on any of my basses centered. The amp's EQ is always number one to tweak (well, actually the preset EQ on my pedal is number one, then the amp's EQ. But, I don't have my board with me all the time), then I use the bass on-board EQ as minor adjustment (which most times when felt needed in the middle of playing).

Did it has more output? Can't remember for sure. But for certain the MK6CBCs dual coil series mode gave the A6 more oomph, especially when doing slap stuff, while the outer single coil mode gave it more clearer sounding.

 

You might want to consider whether you need the coil switching feature, since it will require a mini switch or two (or it can also be done by utilizing a push-pull pot or two) and whether you feel like to drill another hole on the bass body for adding another mini switch or not.

If you'd like to keep the bass body original and you don't need the coil switching, you can opt for Bartolini H.R-5.4AP/918 pre, since this one came with a mini switch for 3 mid frequencies selector (instead of only 2 mid frequencies on the H.R-5.2AP/918, since this one is using push-pull pot for mid freq selector).

In my case, I also prefer to keep the bass body original and prefer to have the coil switching instead of 3 mid-frequencies (2 mid-frequencies is enough for me). This is why I opted for the H.R-5.2AP/918 pre (which didn't come with a mini switch, thus I can use the mini switch hole for coil switching switch).

 

Yes, as long as you get the Bartolini preamp with "AP" model (which stands for Active-Passive), then you'll get push-pull Volume knob for active-passive switching.

Yes, coil switching can also use push-pull potentio(s).

 

I've replaced MK1s and their preamps with USA MK4CBC sets and an Audere preamps, and I was extremely satisfied with the improvements in tone that resulted. It was a great combination!

 

Thick, full and big bottom should go with P2 (original) Dual or Quad soapar. I replace my MIK SR705 with the Quad coil model in 2009 along with NTMB 3band EQ preamp.

Do you found the both pickup placement is more forward to bridge side compare to ibby SR 505 which have same pup but pup placement sit more close to neck side . Maybe that is the reason make A5 sound thin and lack bottom？
I own Cort B5 plus few months ago and I sold it. She sound ok if just solo and room practice. While in mix, sound thin even I just use neck pup plus bass boost.
My new SR300E and Cort Arona 4 sound much better in mix compare to B5 plus.

My2cents

 

I have had my Cort Arona 4 since 2015 and I love it. It sounds so great, even in passive mode.

 

Do you still have the MK-1 Preamp and eq? If so I want to buy it

 

Do you still have The Bartolini MK-1 Preamp and EQ with harness and pots? Im looking to buy

 

Sorry no. I've put them back into the original bass prior selling it.

 

On my Ibby BTB845V, I replaced the Asian MK Barts with USA Barts: a CSC in the neck position and a C (which turned out to be wound half-way between the advertised neck and bridge version specs - perfect for me) in the bridge position. I then replaced the actives with an EMG active preamp. Quiet, Smooth, Clean, roars when I want it to.

 

But those stock Bart BH2 pickups on BTB845V aren't the same as Bart MK1 pickups.