Question about Fishman Loudbox Performer Amplifier LBX 300
Posted by Anonymous on
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Posted on Jan 02, 2017
If you have a pedal input, you may be getting FALSE trips of this.
You may have a pedal jack with switch that is marginal.
TRY putting a pedal into the effect pedal input IF your unit has that and SEE if it acts stable.
These jack and jack switch problems are a pain on all these amps... any brand.
Posted on Feb 01, 2010
SOURCE: I bought a second hand
I don't understand your question. The "Aux in" is just that an input that goes to the power amp. Please note that the Fishman Loudbox does NOT have a headphone jack so don't be disappointed as there plain isn't a headphone jack on this unit. I would recommend that you get a small headphone amplifier for the purpose... or even go to a thrift store and get an old stereo system that has a headphone jack and use that.
Posted on Aug 01, 2011
SOURCE: What's your problem?I have two Fishman amps.The older Loudbox 100 single channel and a Loudbox mini. I am trying to find the service manual for the older fishman as I have a fault with it and the
Fishman iis you best bet http://www.fishman.com
You can download the user manuals, they do have a block diagram, but the scan is pretty bad.
It may end up the person looking at it is going to need to rely upon their general knowledge.
My own suggestion is to pull the chassis out so you can work on it while powering it. And then work your way through the amp with either a signal source plugged in at the input, and with high impedance headphones with test lead ends, go through each audio stage carefully. until the fault is isolated. If it is not caps or the rectifiers in the power supply, faulty ground connections to chassis or faceplate, a faulty 4558 is most probable. The headphone approach is the fastest way to address this last one. If a different series of preamp chip is used, a good source for the IC datasheets in general is Digikey http://www.digikey.com and parts too.
Posted on Feb 05, 2012
Testimonial: "Thanks for your prompt and concise reply John. Indeed I have the manual however the engineer would like to work with the schematic diagram. I have emailed Fishman and await their response..The only info I can find on the website is the manual... "
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