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Post subject: Re: Mustang V Speaker Outputs
Posted: Sun Jan 30, 2011 1:09 pm
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wagdog wrote:
While I don't doubt the expertise of the people posting on the music-electronics forum (a forum I'm a member on as well), the fact is the manual, and last word from the manufacturer clearly states:

"The Mustang V head amplifier provides stereo speaker outputs that must both be connected to a stereo speaker cabinet such as the Mustang V 412, with four 12" Celestion® G12P Rocket 50 speakers (recommended), or two 8Ω speaker cabinets capable of handling 75W each."

Until fender officially edits that manual or issues some sort of clarification, you would be unwise to do otherwise. That said, there are Fender reps here on this board... why haven't they clarified this???


Yup, I feel your pain, my-brother, but I'm afraid I can't answer your question. There is no doubt in my mind that Fender is absolutely 'wrong' on this, and yes, it is indeed very frustrating that they can't get some sort of continuity on this subject between their reps and their own official Operator's Manual. Its freakin' nutz! But in the end, I think we'll find that they simply chose poor wording in their statement that read . . . "must both be connected to a stereo speaker cabinet". In making that statement, I think they simply meant that if the user wants a 'stereo' (as opposed to mono) signal when (and if) using speakers, they must have two (not one) speaker attached. That's my take on it. But believe me, I salute your right to doubt the whole mess! It shouldn't have been this unclear.


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Post subject: Re: Mustang V Speaker Outputs
Posted: Mon Jan 31, 2011 12:03 pm
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Hey Guys,

I apologize for the confusion. That passage in the manual isn't as clear as it could be. Basically, you can connect one cab, two cabs, or no cabs to the Mustang V. As long as the load is 8ohms or greater, you won't have a problem. Again, the load must be 8ohms or greater per side.

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Post subject: Re: Mustang V Speaker Outputs
Posted: Mon Jan 31, 2011 12:18 pm
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Loren,

Thank you for taking the time to post here on behalf of Fender Instruments and thanks also for your efforts in trying to resolve this continued concern about proper (safe) use of speakers with the Mustang-V head.

However, I'll admit to still harboring some degree of concern or confusion on this particular issue. You seem to be saying that the Mustang-V head can be safely used with two speakers or one speaker, as long as the load at each connection is 8-ohms or greater, but you've clearly stated that it can also be used safely with no speakers at all, and yet, that would present a load of 0-ohms, right? Since 0-ohms is less than 8-ohms (i.e., its not "greater"), isn't there a conflict there?

I apologize for continuing to beat this subject up, but something just doesn't appear to jive here? I'm no engineer, but if its gotta see a load "greater than 8-ohms", how can it operate safely with no load whatsoever?


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Post subject: Re: Mustang V Speaker Outputs
Posted: Mon Jan 31, 2011 12:46 pm
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Sockeye wrote:
Loren,

Thank you for taking the time to post here on behalf of Fender Instruments and thanks also for your efforts in trying to resolve this continued concern about proper (safe) use of speakers with the Mustang-V head.

However, I'll admit to still harboring some degree of concern or confusion on this particular issue. You seem to be saying that the Mustang-V head can be safely used with two speakers or one speaker, as long as the load at each connection is 8-ohms or greater, but you've clearly stated that it can also be used safely with no speakers at all, and yet, that would present a load of 0-ohms, right? Since 0-ohms is less than 8-ohms (i.e., its not "greater"), isn't there a conflict there?

I apologize for continuing to beat this subject up, but something just doesn't appear to jive here? I'm no engineer, but if its gotta see a load "greater than 8-ohms", how can it operate safely with no load whatsoever?


Not to put words. . . . .. . . but I think the explaniation is . .. . This SS amp does not require a speaker load. However, IF you choose to connect a MONO Speaker it should have a load of "no less than 8 ohms for that speaker output. Additionally, if you choose to use BOTH speaker outputs the second speaker output should have it's own speaker load of no less than 8 ohms.


To say another way. If putting a load on either speaker output it must (should be?) more than 8 ohms. However, running a SS speaker output with 0 ohms load is permissable.

If thats not right, my appologies to everyone.

Bo


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Post subject: Re: Mustang V Speaker Outputs
Posted: Mon Jan 31, 2011 1:07 pm
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If you are running through headphones you dont need any speakers hooked up because it will cut the path of the power to that section of the output.


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Post subject: Re: Mustang V Speaker Outputs
Posted: Mon Jan 31, 2011 1:14 pm
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Hey Guys,

Bo hit the nail on the head, with one exception.

If there are no speakers connected, that's not the same as a 0 ohm load. That can be considered "no load". You don't actually have a load unless there are speakers connected.

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Post subject: Re: Mustang V Speaker Outputs
Posted: Mon Jan 31, 2011 1:21 pm
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Thanks Loren . ..


:D This horse is "officially" DEAD! :lol:

Bo


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Post subject: Re: Mustang V Speaker Outputs
Posted: Mon Jan 31, 2011 2:09 pm
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Gary Baker wrote:
Thanks Loren . ..

:D This horse is "officially" DEAD! :lol:

Bo


Nope, nope, not yet! Please forget about the headphone jack and its connection to the power stage for a moment. Some of us intend to use the Mustang-V to a mixing board via its stereo FX Send/Return jacks, and use of these DOES NOT derail the power stage (at least not as I understand it), so the question remains . . . is someone "safe" using the Mustang-V head with the following configuration:

NO speakers attached to either of the two 1/4" Output jacks, and
NO headphone or other device attached to the 1/8" TRS Headphone jack, and
BOTH (stereo) 1/4" FX Send/Return jacks connected to a mixer?

When that question is answered, then the issue will be "dead" - not before.


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Post subject: Re: Mustang V Speaker Outputs
Posted: Mon Jan 31, 2011 4:02 pm
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That is a supported configuration. No speakers = No Load = No risk whatsoever of doing any harm to your amp. No headphones connected? Same thing, it's just a headphone jack after all. You can send the audio out of the FX send jacks to another line level source with no problem.

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Post subject: Re: Mustang V Speaker Outputs
Posted: Mon Jan 31, 2011 4:12 pm
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Sockeye - he just meant 8 ohms or greater (IF you attach a speaker) .. so its safe to run with no speakers... So when you do run a cabinet on either or both sides ..make sure its rated at 8 ohms or greater ..not any less..[e.g. 4 ohms will harm the Amp he means].

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Last edited by aLinux on Mon Jan 31, 2011 6:37 pm, edited 1 time in total.

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Post subject: Re: Mustang V Speaker Outputs
Posted: Mon Jan 31, 2011 4:28 pm
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In a word . . . XLNT!

Thanks again Loren and thanks to you too aLinux! I can't believe I'm finally sayin' it, but "case closed". Yahoo! Time to play some guitar!


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Post subject: Re: Mustang V Speaker Outputs
Posted: Mon Aug 15, 2016 12:14 pm
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Just came across this thread while looking for speaker info.

Can't believe this was not expressed this way.......

"No less than 8 ohms, all the way up to infinity ohms, open circuit (No Speaker)"

Zero ohms = a dead short (A piece of wire from + to - in a circuit) and would damage the power amp circuit.
Hope that helps.


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