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Double Bass Full Circle Problem

So, I've searched the forums and while there seems to be alot of praise for this pickup, I've yet to encounter the type of problem I seem to be having, so here goes. . .

I went the the FC back around April of 2007. It always sounded awesome, right from the get go, and there was never much 'work' involved in playing it. I never needed to use a preamp with it, and barely used any EQ to get it to sound right. Contrary to most players' experience, my threads were going UP, so the 'hot' side of the pickup was going into the body of the instrument. I still never had an issue with cutting through or boominess, though. Compared to the Realist that my bass wore before the FC, it had much more presence, and even more bottom. It worked for me, and worked well.

Fast forward to June of this year. I had been putting it off, but it was time for a new fingerboard. I went to a good luthier, who also suggested to me some ideas for cheating my nut down and bridge up (for my extremely large instrument). I was total game, as long as the instrument could retain that wonderful sound I was used to. He had to cut me a new bridge in the process, and the work turned out wonderful. A great-sounding, now much more easily-played bass. What was new were the threads on the bridge now! They went DOWN, with the 'hot' side of the pickup facing the strings. I was actually excited to hear this sound that many posters seemed to love more than what I had been playing for 1 year+. My bass was going to sound even better! :rollno:

I got on the first gig and it was a NIGHTMARE. I plugged in, and my gain was immediately about half of where it was before. I had to turn my amp WAY up just to get a manageable level, but that wasn't all. My midrange seemed to just disappear. There was much, much bottom and very little presence. All of a sudden, I have to work my ass off just to get the string to speak. I keep turning up, and I swear that I'm losing sound. I move the adjuster a 1/4 turn to try SOMETHING, but the sound is just awful. Way too much work now. I'm guessing that this luthier maybe 'mishandled' what seemed to be a fragile pickup. It's broke, I guess. The warranty has also run out at this point, so I'm back to using my Realist, Underwood, Bass Max, etc. . .

Fast forward to about a month ago. I'm really wanting that sound I used to get. I've gotten by on the other pickups, really, with some memorable moments using them, but I'm yearning for the Full Circle sound and playability again. I go to 'my guy' to see if he can fix it. Long story short, he gets someone from Fishman on the phone that tells me that I have a 2nd Gen pickup (which has about a 7-8% failure rate) and the 3rd Gen has virtually zero failure rate. He understands that my warranty has run out, but in the spirit of wanting a 'happy customer', he agrees to send me a new pickup in exchange for the old one. Thank you, Fishman! I'm in business, once I get the new one put on. I get the new pickup installed and I'm anxious to get to my first gig with it, knowing that the sound on the gig (rather than the sound at home) is what I'm dying to hear. It's a piano trio. I plug in, and notice the abundance of low end immediately. Okay. We start playing and I'm immediately taken back to the gig earlier this year. Gobs of bottom. Practically NO mids. Presence is gone. I'm working my ass off to get a sound out. The nightmare has returned and the worst is confirmed: it wasn't the pickup!

So I get home and put the bass, literally, under a microscope. My bridge seems to be in the same place, soundpost is fine, and everything looks good except one thing: bridge contact with the pickup. It appears that there's a TINY bit of uneveness between the top of the pickup and the top of the bridge and the element is not COMPLETELY flush against the top of the bridge--looking closely you can see the smallest of gaps. This pickup IS a piezo, correct? I'm thinking that (much like an Underwood or Realist) there is an optimum amount of contact/pressure to maximizing the sound of this pickup and I might be going through what one might go through if you don't, say, wedge an Underwood tight enough: loss of focus, too much bottom, a drop in mids, less gain. I'm thinking that the bridge has to come off and be sanded at the leg (where it touches the element) and maybe that will make a difference. I'm not big on taking off my bridge by myself, so I've made an appointment with my local luthier for Tuesday, but on the phone he concurred with me and said that when you install adjusters on a bridge, this can be something that's taken for granted. Apparently, it's not so easy to get that adjuster perfectly parallel with the wood on the bridge (and he's not the guy that cut the bridge, either).

Anyway, is anybody having this problem? Anybody ever have this problem?
 
Common problem. It's not installed quite right.

The surfaces have to be near perfect flat, touching all the way round. Be sure the hole is deep enough for the bridge to put it's full weight on the piezo as well.

Luthier's got some more work to do.
 
Common problem. It's not installed quite right.

The surfaces have to be near perfect flat, touching all the way round. Be sure the hole is deep enough for the bridge to put it's full weight on the piezo as well.

Luthier's got some more work to do.


Yup. Gaps are bad, and it's all about pressure. I'd say your lluthier "missed it by that much".
 

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So, my luthier took a lathe and shaved down the underside of my bridge to make it perfectly flat against the FC. He also drilled the upper hole into the bridge just a smidge deeper. Visually, it was night and day. Having my bridge right against the pickup/adjuster element looks completely different.

I got the bass home and VOILA--much more gain, much more presence through the amp. Can't get the volume past 10:00 without breaking windows. I am noticing that with my threads going this way, there are more 'string effects' in the sound, but nothing not cured with an EQ adjustment. Presence for days, little EQ needed--This was the sound I was looking for. Thanks to all for the help.

Gaps=bad.
 
So, I did a little tour this weekend with Debby Boone (yeah, THAT Debby Boone). We started in West Virginia, bussed up to Michigan, and finished in Ohio. The 3 rooms couldn't have been more different, and I played through 3 different backline rigs (consisting of a mix of GK, Peavey, and SWR gear). The pickup sounded awesome in a mostly jazz setting with piano, drums, trumpet, sax, and vocals. The best sound, believe it or not, was w/ an all GK setup: 800RB head, 1x15 cab in a fairly 'live' room, but very consistent in every venue--with little (if any) EQ dialed in.

Question to FC users: I used the pickup for about a year-and-a-half with my threads going UP. I'm noticing some distinct differences with my threads going DOWN. How's everybody EQ-ing with your threads going DOWN? The sound is definitely much more 'pickupy' (is that a word?) this way, that is to say that those mid frequencies (like around 1k) seem to be MUCH more present--and can be dialed down a bit more. Response seems a little 'quicker' as well. I do find myself boosting the bass a little more with my threads DOWN, too. I also find that the arco sound isn't as great as when my threads went up--it can be dialed in, but definitely not as warm. Going with the wire on a corner seems to get me a little closer to that 'body' sound. Overall, this STILL sounds (and plays) better than any other pickup I've used (Underwood, Realist, K&K, Schertler, etc)--hands down, but I'm tweaking a little to get my sound closer to the 'threads up' sound I used to get. Still killing, though. Still killing.

p.s. Yes. We played that song. Every night ;)
 
Your perceptions are very accurate.

Given a choice I prefer the string side of that pickup over the top side of that pickup because, although they are very close, the string side gives me a touch more cut through in a mix when things get full. For me a welcome tradeoff from having just a little to much edge arco. Having said that the differences in the sound up or down are so close you'd be hard pressed to get a notice one way or another out of anyone but yourself.

EQ choices are always different for each room and any given night as the bass is always moving and the room is packed a different way, nothing is constant.

Experiment with phase reversal and high pass filtering. You may find them useful, even more so than EQ or in combination with EQ.
 
I can't speak to the comparison between threads down and threads up, as mine go down on both basses. But, the EQ is about the same on both: I usually put highs and mids at about 9 o'clock on the pickup channel (AI Focus) and leave the bass at high noon. As I get louder, I use more HP filter. I can get "stoopid loud" with these settings and no feedback, which can be useful at times.
 
Thought I'd join the party for a quick rant.

My FC just crapped out!

Since I don't have any DB gigs over the next two weeks, I decided today was a good day to change strings, do a clean up / set up, etc. Went to plug in and tune up -- nuttin but 60 cycle hum.

I've had several problems with this pickup along the way.

My first generation crapped out almost immediately and was quickly replaced by the kind folks at Fishman. Maybe I have a second generation? If so, I must be in that failure percentile you listed!

Anyway, the heck with it -- I just ordered a brand new one from AHBG. $209! I thought these things were still like $179!

Anyway, I'll ship my old one back for repair after I install the new one -- cuz dang it -- I just put me on some new Obligatos (and Spiros) and I don't want to booger up my new strings!!!

As for the threads, I've only know the "threads down" setup and mine seems to sound quite good nearly flat through my SWR rig. I normally dip a little of the muddy low mids, but otherwise its the best MBOL that I've found so far...


Hold On -- This Just In!

Got a call back from customer service -- they're gonna help me out! :hyper::hyper::hyper:

Seems like I do have a second generation. Apparently, the newer ones are held together with tiny machine screws and are "iron clad". Mine is smooth and must be the glue-type design.

Thank goodness for good customer support!
 
Paul, inspired by your story, I spent the last few days working on my original bridge that Bruce cut a few years ago (Yinz Burghers 'member Bruce).

I got the E side nice & snug on the pup and man -- much louder than my first attempt yesterday.

As well -- many thanks to AHBG -- who sent a new Full Circle over the weekend which arrived Monday AM sharp!


Jason
 
To chime in on the fit:
My FC installed by yours truly using brass inserts last October gradually lost volume. It made no sound when turned slightly. The brass insert that WAS perfectly flush with the bridge became slightly proud of the wood as the wood shrunk with a change in seasons. That's my theory anyway. A quick use of the dremel and a little sanding has it fitting perfectly now and it sounds great.
Check your fit.
 
The best sound, believe it or not, was w/ an all GK setup: 800RB head, 1x15 cab in a fairly 'live' room, but very consistent in every venue--with little (if any) EQ dialed in.

pdbass, my 800RB consistently sounds better than my rane preamp into mackie mains. But only so far in rehearsal-- I'm struggling with how to use it in a doubling context, but I love the sound-- I just deactivate the mid scoop and go. It's not recording quality or anything, but a good clear articulate tone that cuts through the band.

edit: with old BP100's.