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Post subject: Extension speaker for Super Sonic Twin?
Posted: Wed Aug 08, 2012 2:37 pm
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Can I use a 15"/4 Ohm cabinet as an extension for the Super Sonic Twin 100W?


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Post subject: Re: Extension speaker for Super Sonic Twin?
Posted: Wed Aug 08, 2012 3:06 pm
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Hi Larz,

Yes.
Whether you use the 4-ohm cab by itself plugged into the main speaker jack, or with the 4-ohm cab plugged into the ext speaker jack and the amp's internal speakers plugged into the main speaker jack, just switch the impedance selector on the amp to the 4-ohm setting.

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Post subject: Re: Extension speaker for Super Sonic Twin?
Posted: Wed Aug 08, 2012 11:16 pm
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Thanks for a very swift response - forums are great!


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Post subject: Re: Extension speaker for Super Sonic Twin?
Posted: Thu Aug 09, 2012 12:43 am
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Hi Larz.

Fender Supersonic Twins are factory wired as 16ohms as the 2x8ohm Celestions are wired in series. So your Ohm selector switch should by default be in the 16ohm position before you plug the CAB in. As Shimmilou confirmed you can Plug the 4-ohm Cab in the extension Jack making it parrallel to your combo speakers creating a total of 3.2ohms speaker load or you can use the CAB on its own, and for both you must ensure your ohms selector switch is set to the appropriate 4ohm setting.

When you first got your Supersonic Twin did it also come factory set on 8ohms for the 16ohms speaker configuration?

As a side note, I re-wired my SuperSonic Twin speaker configuration such that each speaker has its own jack - one in the "MAIN" and one in the "Extension" thus the combo runs at 8ohms//8ohms = 4ohms. This also offers redundancy so that if one speaker cable fails the other one will keep the tranny safe. And if I decide to use a CAB I will still have one of the Combo speakers functioning.

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Post subject: Re: Extension speaker for Super Sonic Twin?
Posted: Thu Aug 09, 2012 7:24 am
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AaronK wrote:
This also offers redundancy so that if one speaker cable fails the other one will keep the tranny safe.


????

In some forty-four years of professional play, I don't think I've ever had a speaker cable fail -- and especially not a combo wiring harness.

And just out of curiosity, what's going to "keep the tranny safe" if the hypothetical failure you envision involves one of those cables developing a dead short?

Arjay

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Post subject: Re: Extension speaker for Super Sonic Twin?
Posted: Thu Aug 09, 2012 8:25 am
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Retroverbial wrote:
AaronK wrote:
This also offers redundancy so that if one speaker cable fails the other one will keep the tranny safe.


????

In some forty-four years of professional play, I don't think I've ever had a speaker cable fail -- and especially not a combo wiring harness.

And just out of curiosity, what's going to "keep the tranny safe" if the hypothetical failure you envision involves one of those cables developing a dead short?

Arjay


Umm, I have never had my strap come off my guitars before but I still put straplocks on my favourite ones so that they never will.

And the speaker connects via a guitar jack (which we all know can start making a bad connection after time). Also the lugs that connect to the speakers are not solid connections (but I did also solder those thanks to your advice on another post :D ).
And we all know how much a 100watt valve combo vibrates. And also a dead short is aparently less fatal than an open connection to a valve amp tranny right? And a short is less likely to occur on a speaker cable than a loose connection.

And dispite what others think the redundancy will ease my mind.

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Post subject: Re: Extension speaker for Super Sonic Twin?
Posted: Thu Aug 09, 2012 11:13 am
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Ease your mind to your heart's content.

I still think your......"theory"......is totally off the wall.

And yeah, I've been playing a 135-watt combo amp since 1978.

The speaker wires have yet to fall off.

:lol:

Arjay

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Post subject: Re: Extension speaker for Super Sonic Twin?
Posted: Thu Aug 09, 2012 12:07 pm
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Yeah... Arjay you are probably right and my way of doing things is "OFF THE WALL", but I will admit I am a natural born pessimist and will assume the worst will inevitably happen, so I do what I can to prevent it. And it can't hurt to be a little more thourough with connections.

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Post subject: Re: Extension speaker for Super Sonic Twin?
Posted: Thu Aug 09, 2012 2:56 pm
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Hi Aaron,

Thanks a lot for your advice! I'm new at this forum and wonder how you attached the pictures of your gear - looks dead cool.


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Post subject: Re: Extension speaker for Super Sonic Twin?
Posted: Thu Aug 09, 2012 3:43 pm
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AaronK wrote:
Yeah... Arjay you are probably right and my way of doing things is "OFF THE WALL", but I will admit I am a natural born pessimist and will assume the worst will inevitably happen, so I do what I can to prevent it.


In that case how about a little "Sauce for the goose, Mr. Savak"?

According to the laws of probability, you are twice as likely to experience a catastrophic speaker-cable failure when using a pair of wiring harnesses. And the worst-case scenario has your amp's output tranny shorting out with a three-alarm conflagration the likely result. You might consider mounting a smoke detector inside the cabinet......

(hey -- you did declare yourself to be a pessimist, right?)

:mrgreen:

Arjay

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Post subject: Re: Extension speaker for Super Sonic Twin?
Posted: Thu Aug 09, 2012 10:36 pm
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Yeah Arjay... but worst case scenario is way down on the probability list, especially since my speaker cable is 17guage twinflex wire - so the cable handles 3 x the amps output current, and the chances of the cable melting and shorting are literally none. Then the cables are inside the combo chasis so the likelyhood of being pinched are none. So that leaves the speaker! How many speakers do you know of that have shorted when blown? Also If it starts to rain I doubt there is much you can do about that but stop playing and switch off and cover the gear and move it to a dry place as we all know music gear is not a friend of rain. Oh and I don't leave drinks on my gear.

So now that I have ruled out shorts on speaker cables lets tackle the more likely scenario. Due to gear being moved around and transported and due to large amounts of vibration, a speaker jack plug tip is no longer making the best of contact. When I fire up the AMP and play I still have sound, why? because the other speaker is still connected. And instead of a ball of smoke I have the oppertunity to fix the bad speaker jack.

Now you are right about the odds doubling that a speaker cable will fail because I now have 2 of them, but so does the odds of catching the problem before some expensive damage is done because I have 2 of them. But technically speaking any twin amp still has 2 speaker cables no matter how long or short because of the inherant fact that twins have 2 speakers.

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Post subject: Re: Extension speaker for Super Sonic Twin?
Posted: Thu Aug 09, 2012 10:58 pm
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Larz wrote:
Hi Aaron,

Thanks a lot for your advice! I'm new at this forum and wonder how you attached the pictures of your gear - looks dead cool.


Hi Larz

I am glad I could offer my views that may help you, but please, you should really take note of the comments from the likes of RETROVERBIAL as they really have way more years of experiance and knowledge of these topics than I do, however don't be affraid to try and make sense of things yourself as that is how we learn.

About those pics, you go to your control panel - profile - and add them under "Signature". You will need some site to host the picture for you like "ImageShack" etc. and then you just include the IMG link in your signature.

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Post subject: Re: Extension speaker for Super Sonic Twin?
Posted: Fri Aug 10, 2012 12:53 am
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AaronK wrote:
Yeah Arjay... but worst case scenario is way down on the probability list, especially since my speaker cable is 17guage twinflex wire - so the cable handles 3 x the amps output current, and the chances of the cable melting and shorting are literally none. Then the cables are inside the combo chasis so the likelyhood of being pinched are none. So that leaves the speaker! How many speakers do you know of that have shorted when blown? Also If it starts to rain I doubt there is much you can do about that but stop playing and switch off and cover the gear and move it to a dry place as we all know music gear is not a friend of rain. Oh and I don't leave drinks on my gear.

So now that I have ruled out shorts on speaker cables lets tackle the more likely scenario. Due to gear being moved around and transported and due to large amounts of vibration, a speaker jack plug tip is no longer making the best of contact. When I fire up the AMP and play I still have sound, why? because the other speaker is still connected. And instead of a ball of smoke I have the oppertunity to fix the bad speaker jack.

Now you are right about the odds doubling that a speaker cable will fail because I now have 2 of them, but so does the odds of catching the problem before some expensive damage is done because I have 2 of them. But technically speaking any twin amp still has 2 speaker cables no matter how long or short because of the inherant fact that twins have 2 speakers.


All well and good but let me reiterate lest you missed it, kid......

Image

This is a one-owner Twin Reverb from 1978. It's been the equivalent of around the world at least three times (125,000 km). I've beaten the hell out of it in the intervening 34 years. It's endured far more abuse than mere mortal amps such as those made today are capable of withstanding. It's loaded with real steel and iron -- not the crappyass tin and aluminum that most contemporary stuff is built out of. It's taken a few dives off the back of a pickup truck, been knocked off the stage by drooling drunks, even got juggled around by baggage handlers before being unceremoniously tossed into the baggage compartment of a Boeing 727 a time or two. The sonofabitch weighs 118 lbs.

And the speaker wires have never shaken themselves loose nor opened, shorted, or anything else.

Arjay

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Post subject: Re: Extension speaker for Super Sonic Twin?
Posted: Fri Aug 10, 2012 4:41 am
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Point taken Arjay, but we are not talking about that beautiful 1978 Twin Reverb. We are talking about the 2011' 83lb mere mortal amp the "SUPERSONIC TWIN" made by todays "appalling standards". Although I myself would still implore the same measures if I owned that STAR of yours anyhow. I acknowledge that you are the wiser and more experienced in all things FENDER, but what I do with my amp really has no bearing on yours, and if others like my way of doing things then good for them. There is plenty of your wisdom on this FORUM for them to follow if they wish. What I have done is not wrong, it may be "over the top" and you may disagree with the measures I have taken, but if you are trying to convince me of that then keep at it if you will, but it still won't change my mind. However, it is reassuring to know that some things can still be well made to withstand alot of abuse.

I almost wonder if we are not gracefully arguing this point purely because it is fun to interact on this FORUM :D .

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Post subject: Re: Extension speaker for Super Sonic Twin?
Posted: Fri Aug 10, 2012 7:23 am
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AaronK wrote:
I almost wonder if we are not gracefully arguing this point purely because it is fun to interact on this FORUM :D .


You need the intellectual stimulation, son.

:mrgreen:

Arjay

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