rogonzab
184 posts
Dec 07, 2012
11:48 AM
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Talking to a friend I have an idea, but I dont know if is possible.
If I buy an extra spaker, and make a cab for it, can I plug it in paralel whit the speaker in the amp, so I can have the 2 speaker working, but not in the same cab?
Think in what adam does whit two amps, but whit only one amp and the other would be a speaker cab only.
It can be done?
It is to crazy?
I misspell to much?
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Tuckster
1212 posts
Dec 07, 2012
12:00 PM
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It can be done,but it depends. Does the amp have a multitap output transformer? You'd have to wire in a jack to make it convenient. Otherwise,you'd have wires clipped in-not neat and subject to vibrating loose. Your load would be cut in half if the speakers are the same impedence. Not hard,but you got to know what you're doing or find someone who does.
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Greg Heumann
1882 posts
Dec 07, 2012
8:47 PM
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The amp doesn't care a bit where the speaker(s) are mounted. It DOES care what the impedance of the total speaker package is. Wiring speakers in parallel lowers the impedance. Wiring them in series raises it. Once you have more than 2 speakers you can wire them in various "series parallel" combinations. The output transformer is setup for a specific impedance. If you go more than about 50% higher you will lose output and efficiency. If you go more than about 50% lower you can draw too much current and burn up the OT or other components.
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/Greg
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rogonzab
186 posts
Dec 08, 2012
7:30 AM
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HI,
I am not making a specific question because it was just an idea. I wanted to know if it is posible.
Another subquestion,
it is posible to make the mod in a way that is reversible? so one can normaly use the speaker in the amp (like when I am in my house), and if one want to have more volumen(like when I am in a jam) conect the other speaker?
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5F6H
1449 posts
Dec 08, 2012
7:42 AM
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Hi Rogonzab,
Greg has already gone most of the way to answering this question.
Are we still talking about a Bugera V5? Look at the back panel, there is a jack plug running from the speaker to the printed box marked "Output" which has sockets for "Phones" and another for the speaker with lightning flashes either side. It states the ohmage (the number next to the omega sign) of the speaker load. To use a separate cab, unplug the on-board speaker (amp unplugged from wall AC and switched off) & plug the new/bigger/more speakers/different speakers cab into this jack - MAKE SURE THE OHMS OF THE NEW CAB MATCHES WHAT IS WRITTEN ON THE AMP.
When you want to use the amp at home, with the on-board speaker, unplug the other cab and plug the on-board speaker back in. This is the simplest answer.
NEVER TURN ON THE AMP WITHOUT A SPEAKER LOAD CONNECTED.
Your amp is not very loud because it runs low voltages with a small power supply...you can undoubtedly make it somewhat louder, but if you need a big hike in volume for jams you would be better micing up, or lining out the amp into a PA, or buying a bigger amp for playing out. As a wise man once said, "Ye cannae change the laws of physics Cap'n!" ;-)
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TetonJohn
18 posts
Dec 08, 2012
7:52 AM
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Edit: Typed this BEFORE previous respone.
Most anything is possible! (especially in the abstract)
For example, I have an amp head (which means that a combo amp couldbe built or modded the same way) that lets you select 4 ohm or 8 (the output transformer has to have a 4 ohm tap and an 8 ohm tap in order to have this particular possibility). I also have a Y speaker cable. So, if I want to use one 8 ohm speaker, I just use a normal speaker cable. If I want to use two speakers, I plug my Y cable (wired parallel) into the 4 ohm jack, and connect to 2 8 0hm speakers (wired parallel you half the ohms of the two speakers (if wired in series, you add then together).
Example two, I have a '63 Fender Princeton Reverb with an external speaker jack that you can use or not as you wish. So, you can use just the 8 ohm speaker in the cab or plug in an external 8 to use both (that results in 4 ohm because it is wired parallel) -- as has been mentioned, these amps can handle that.
Also, if your speakers are connected to your amp with a jack, you can unplug it (with the amp off!) and connect to a larger external speaker (or set) of the same ohms in a external cab. (This could be a "mod" if you don't have a speaker jack).
So,although you say you are asking a "general" question, it really does depend on your amp and how it is modded if it requires a mod (and if the OT has multiple taps, etc. etc.)
You did make reference to when "you" are in a jam -- so there may be specifics to be added.
It may also be worth saying that there is only so much volume you can gain by adding a speaker -- it doesn't change the power of the amp.
Last Edited by on Dec 08, 2012 9:41 AM
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Greg Heumann
1883 posts
Dec 08, 2012
8:32 AM
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I'm guessing the same thing that 5F6H is - that what you're after is more volume. Maybe this amp sounds REALLY loud at home, but you couldn't hear it at a jam. If that is the case - don't waste a dime on a speaker cabinet. It will not help.
Instead read The Relationship of Voltage, Loudness, Power and Decibels.
In particular, to get twice as loud (probably about what you need if the above assumption is true), it is important to note that you need TEN TIMES more power from the amplifier!
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/Greg
Last Edited by on Dec 08, 2012 9:27 AM
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Frank
1552 posts
Dec 08, 2012
10:02 AM
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I had a 1/4 inch guitar jack added to the cab of a speaker I love and I use a guitar cord to attach it to my amp and it works and sounds great.
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5F6H
1450 posts
Dec 08, 2012
10:12 AM
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Frank, play safe and buy/make a speaker cable - a guitar cord isn't designed to carry whole W or Amps. Any, insulated, stranded wire 1mm or better in diameter will probably do (lamp cord, old AC cord).
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http://www.facebook.com/markburness
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Frank
1553 posts
Dec 08, 2012
10:33 AM
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Thanks Mark, I'll have to run that advise by my buddy who did that mod for me - He's a working musician and has a long established buisness working on guitars and amps...I think I remember him saying the guitar cord is fine to use but I'll double check.
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walterharp
998 posts
Dec 08, 2012
11:13 AM
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Part of the reason adams setup sounds so good live is that he is using one amp that breaks up well and another cleaner one to punch the volume and carry the bass better. he separates the two by some distance and that fattens the tone...So if that is what you are after rather than more volume, the two separate amps is probably the way to go
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rogonzab
188 posts
Dec 08, 2012
12:08 PM
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"Part of the reason adams setup sounds so good live is that he is using one amp that breaks up well and another cleaner one to punch the volume and carry the bass better."
You think is better that the second speaker (not the one in the amp) would be a 10" or 12" to give more bootom end to the sound??
Yes, I have a Bugera V5. And I am not shure if my amp is not loud enough for a jam because I still not go to one. But as soon a finish school (the next week I have to deliver my final tesis) I am planing to go a street jam, and as far as I know the biggest guitar amp that I see in there is a 25w SS Fender.
Another question:
Why there is no info on the internet of something like this? I think is a good idea, but I dont think that I am the first person to think this setup. What I am missing here?
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Frank
1555 posts
Dec 08, 2012
12:31 PM
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What I am missing here? a 1/4 inch jack...
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rogonzab
189 posts
Dec 13, 2012
11:23 AM
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I think i know what I am missing now: a PA
There is no point in adding another speaker if you can use the ones on the PA.
So, another question.
can I mic my 5w amp whit a power speaker? There are some that have a built in mic input.
I guess that would be easy and more efective.
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dougharps
302 posts
Dec 13, 2012
11:32 AM
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Yes, you can. Several years ago I mic'ed a 10 Watt amp with an 8" speaker to a 100 Watt 10" powered monitor to boost the volume for a gig. I played with a full band with others using considerably larger amps. It works. Just avoid letting your mic to the powered speaker pick up sound from the powered speaker, or you will get feedback. Now they have have Class D powered speakers that are much more powerful than my powered monitor.
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Doug S.
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