Author Topic: Passive switch installed  (Read 1315 times)

bass4worship

  • club
  • Junior Member
  • *
  • Posts: 44
Passive switch installed
« on: December 08, 2009, 06:40:38 PM »
Well I had nothing to do the another day so I decided to do some upgrade to my Alembic Excel. I wasn't to happy that my Excel didn't have a passive bypass switch so I went to work on. What I did find out is that the fatboy pickup do work in a passive mode, so I install a switch, volume and tone control so that went I'm not in the active I can still control the V/T. Every thing went good. So now I glad not to have to change a battery in the middle of a gig.

tmoney61092

  • club
  • Senior Member
  • *
  • Posts: 945
Passive switch installed
« Reply #1 on: December 08, 2009, 06:44:17 PM »
when i first bought my Alembic p/j pickups, i connected them with the volumes and tones of one of my other basses to make sure they worked, sounds pretty good to me
 
~Taylor Watterson

bass4worship

  • club
  • Junior Member
  • *
  • Posts: 44
Passive switch installed
« Reply #2 on: December 08, 2009, 06:57:11 PM »
The tone is flat but that a good thing cause I can get most of tone i'm looking for from my amp.

mike1762

  • club
  • Senior Member
  • *
  • Posts: 1048
Passive switch installed
« Reply #3 on: December 08, 2009, 07:34:54 PM »
I imagine the output is pretty weak isn't it?

jazzyvee

  • club
  • Senior Member
  • *
  • Posts: 8713
  • Bass, Guitar, Preamps.
Passive switch installed
« Reply #4 on: December 08, 2009, 11:50:26 PM »
Hmm that sounds like an interesting backup idea. I'm curious, does it still have the alembic sound characteristics in passive mode?
 
Jazzyvee
The sound of Alembic is medicine for the soul!
http://www.alembic.com/info/fc_ktwins.html

terryc

  • club
  • Senior Member
  • *
  • Posts: 2488
Passive switch installed
« Reply #5 on: December 09, 2009, 01:54:51 AM »
My understanding that the output is so low that pre amps are needed.
I would think that battery life is not an issue as they last so long in non series instruments..nearly a year with Duracel Alkaline.
Since my SIMS LEDS retrofit which uses the same battery, the LED's dim on the neck before the pre amp goes to distortion.
I have invested in very high quality re chargables(they were ?15.00 each) and are rated at 250mAH which is almost up to alkaline standard.
The good news is the can be used over a 1000 times and I have four of them, one for the bass, one for my Senheisser radio system and one for my bass driver pedal and one spare.

tmoney61092

  • club
  • Senior Member
  • *
  • Posts: 945
Passive switch installed
« Reply #6 on: December 09, 2009, 05:11:41 AM »
well with my experience, i put the Alembic p mixed with my passive jazz pickup, the Alembic alone had an OK output, but when i turned the volume on the jazz up, it was definitly the dominant of the 2, don't really remember the output with both Alembics though
 
~Taylor Watterson

bass4worship

  • club
  • Junior Member
  • *
  • Posts: 44
Passive switch installed
« Reply #7 on: December 09, 2009, 08:37:21 AM »
The output of the fatboy pickup has the same volume in passive as with the bass in active with the volume at 50%. The sound characteristics in passive is about the same as active. Why Alembic choose not to install a A/P switch is something I'll never understand on such a fine bass. I'm going to put together a sound track so you guys can hear what it sound like in passive and active.

adriaan

  • Global Moderator
  • Senior Member
  • ******
  • Posts: 4320
Passive switch installed
« Reply #8 on: December 09, 2009, 08:49:13 AM »
IIRC the low-impedance pickups will produce a truer signal than high impedance pickups, but you need a pre-amp to have a better match against the impedance of your average cable. An impedance mismatch will result in a less truthful signal at the other end of the cable.
 
The Fatboy IS louder than an AXY/MXY, but also less hi-fi sounding.

bass4worship

  • club
  • Junior Member
  • *
  • Posts: 44
Passive switch installed
« Reply #9 on: December 09, 2009, 09:21:06 AM »
By the way when I make this track I'll will make it without a amp, plug right into the mixer.

briant

  • club
  • Senior Member
  • *
  • Posts: 700
Passive switch installed
« Reply #10 on: December 09, 2009, 10:00:49 AM »
Interesting idea but rendered completely unnecessary if you simply change your electronics battery every 6 months or so.  If you unplug your bass between practices/gigs there is no reason the electronics battery won?t last 6+ months.  Unless of course you?re using a Series bass without the power supply? then good luck to you.

mario_farufyno

  • club
  • Senior Member
  • *
  • Posts: 1799
  • Alembic Rogue 4 strings
Passive switch installed
« Reply #11 on: December 09, 2009, 01:27:24 PM »
I prefer to carry a spare batterie with me (along with an extra string set and a fuse to the Amp). Active circuits always warns us about a moribund batterie days before it tottaly drains out. I know it is going dead just hearing when the Bass is distorting, lacking headroom and when Tone starts to get funny.
 
It doesn't seems a big idea having to operate with no Eq and several dB lower than when we did in sound check. Remeber that your signal and tone will be away in Passive mode and I can't see how this could be usefull to the Sound Tech during a show... All this just to avoid carring a spare batterie and a tool.  
 
How being incapable to change tone and loosing much of my signal level can be interesting in the middle of a Gig?
 
I can only see two reason to not use an Active circuit on a Bass: Not liking the way it sounds or to not want the minus side of having to carrie a new batterie on the Gigbag. Both reasons have the same answer: Use a Passive Bass.
 
I can use one Battery for a whole year in my Rogue, if I would dare to, but I prefer to change it each 6 months. I write the changing date in a brown tape at it, just in case of forgeting to change it in December and July again. Easy and cheap...
Not just a bass, this is an Alembic!

bass4worship

  • club
  • Junior Member
  • *
  • Posts: 44
Passive switch installed
« Reply #12 on: December 09, 2009, 06:10:48 PM »
I just uploaded the video and sound track on You-tube so you can hear for yourself what the active and passive mode sound like. chick or pastes link: http://www.youtube.com/watch?v=J4yeXZUU1n0&feature=player_embedded#

bass4worship

  • club
  • Junior Member
  • *
  • Posts: 44
Passive switch installed
« Reply #13 on: December 09, 2009, 08:53:06 PM »
By mario: I can only see two reason to not use an Active circuit on a Bass: Not liking the way it sounds or to not want the minus side of having to carrie a new batterie on the Gigbag. Both reasons have the same answer: Use a Passive Bass.
 
 I guessing you're new to playing bass or just don't know what you're talking about.
 
(Message edited by bass4worship on December 09, 2009)

bigredbass

  • club
  • Senior Member
  • *
  • Posts: 3032
Passive switch installed
« Reply #14 on: December 09, 2009, 10:51:20 PM »
Actually our friend Mario is an accomplished, working professional musician in South America.  Not a lot of bedroom players pack spare batteries, strings, and amp fuses.
 
Hey, if you like this mod, great.  Most of us with a few miles under our belts gig-wise obviously prefer Alembic's low impedance pickups and have made peace with living with 9 volts or the offboard power supply.  Most of us also own passive basses.  And most of us have had the occasional power outage on a gig, which is why most of us, like Mario, keep a spare handy.  Generally you can hear the tone, headroom, etc., going South before it goes silent, but occasionally not.
 
This is generally a pretty 'flameless' chat room, so I would think about just who you may or may not know when you continue the dialog.
 
I'd imagine over the years, ALEMBIC has done lots of mods not generally kept in their standard features.  And Ron's original idea was to lower the number of turns in the coils to better the frequency response of the pickups vs. what was available in the late 60's.    
The onboard preamp/low impedance pickup concept he refined and incorporated into the axes was the forerunner of EMG, Bartollini, and so on.  But there's lots of great passive pickups as well, and if it's handy for you to have the facility to switch back and forth, great.
 
But believe me, a lot of us have been playing a long time . . . and have worked hard to know what we're talking about.