It is currently Mon Mar 16, 2020 2:58 pm

All times are UTC - 7 hours



Post new topic Reply to topic  [ 7 posts ] 
Author Message
Post subject: Question for the Fender mods/reps here
Posted: Sun Feb 22, 2015 8:29 am
Offline
Aspiring Musician
Aspiring Musician

Joined: Tue Feb 10, 2009 7:53 pm
Posts: 972
I read somewhere, i think here, that the ground wire that is bolted to the speaker frame on one of the 4 mounting screws is necessary for proper operation. If thats the case, what about the head version of the mustang? How does that accomplish this? Certainly the speaker cable is only a regular 2 conductor otherwise you would not be able to use any other can besides the fender. So please explain this. I am considering using a cab with my Mustang III by rigging up a jack so i can plug it into an extension cab or the internal speaker, whichever i choose. Don't bother going into impedance and wiring issues, i understand all those. I just want to know if that frame wire is so necassary, how do the head owners get around that? Do the fender cabs have a 3 conductor cable, and if so how would a head owner be able to use a different cab? I can't imagine a manufacturer would sell an amp that can't be used with any cab other than thiers.


Top
Profile
Fender Play Winter Sale 2020
Post subject: Re: Question for the Fender mods/reps here
Posted: Sun Feb 22, 2015 12:12 pm
Offline
Roadie
Roadie

Joined: Tue Jan 27, 2015 3:00 am
Posts: 261
I don't it's "necessary for proper operation". It's just best practice (and maybe part of CE regulations or something) to ground all metal components in an appliance, especially if they can be reached and touched.


Top
Profile
Post subject: Re: Question for the Fender mods/reps here
Posted: Tue Feb 24, 2015 3:49 pm
Offline
Professional Musician
Professional Musician

Joined: Sun Jun 17, 2012 11:37 am
Posts: 1315
Location: England
Quote:
what about the head version of the mustang?

A combo amp has mains voltage. Consequently, all metal parts must be earthed/grounded in case they inadvertently become 'live' with mains voltage (eg if a mains wire came adrift and touched something else).

A (passive) speaker cab has no mains voltage within it, as there is no mains connection to the cab. Consequently, the metal parts within it don't need to be earthed.


Top
Profile
Post subject: Re: Question for the Fender mods/reps here
Posted: Tue Feb 24, 2015 5:06 pm
Offline
Roadie
Roadie

Joined: Tue Jan 27, 2015 3:00 am
Posts: 261
That's my thought as well. But what if a mains wire comes adrift in the head and touches the speaker output, and you connect an open cab?


Top
Profile
Post subject: Re: Question for the Fender mods/reps here
Posted: Tue Feb 24, 2015 5:45 pm
Offline
Professional Musician
Professional Musician

Joined: Sun Jun 17, 2012 11:37 am
Posts: 1315
Location: England
Quote:
what if a mains wire comes adrift in the head and touches the speaker output, and you connect an open cab?

Yes I was wondering this too when I wrote my earlier reply. I don't know the answer - maybe the regulations don't consider that scenario! Or, if the speaker outputs in the head become 'live' with mains voltage, the protection in the head should blow a fuse, etc, quickly enough that it's not going to cause a problem for any downstream equipment (or anyone touching such equipment!).


Top
Profile
Post subject: Re: Question for the Fender mods/reps here
Posted: Tue Feb 24, 2015 6:08 pm
Offline
Aspiring Musician
Aspiring Musician

Joined: Tue Feb 10, 2009 7:53 pm
Posts: 972
No other combo i've seen in 40+ years of playing had this. I've owned probably 100 amps, almost all combos.

scott-uk wrote:
Quote:
what about the head version of the mustang?

A combo amp has mains voltage. Consequently, all metal parts must be earthed/grounded in case they inadvertently become 'live' with mains voltage (eg if a mains wire came adrift and touched something else).

A (passive) speaker cab has no mains voltage within it, as there is no mains connection to the cab. Consequently, the metal parts within it don't need to be earthed.


Top
Profile
Post subject: Re: Question for the Fender mods/reps here
Posted: Wed Feb 25, 2015 7:22 am
Offline
Rock Star
Rock Star

Joined: Wed Apr 11, 2012 7:37 am
Posts: 4099
Location: New York
My best guess is since Mustang amps are like little computers with an amp attached, this is a precaution to guard against ESD (electrostatic discharge). Seems like a good theory anyway....

_________________
Please subscribe to my Image Channel!
https://www.youtube.com/user/b7567


Top
Profile
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 7 posts ] 

All times are UTC - 7 hours

Fender Play Winter Sale 2020

Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to: