#1
I already know I am going to get "Don't do it,buy a new amp" or "stupid idea" but it's something I want to do to give my own unique spin on my amp.

I have a Vox AD50VT combo amp.

I have been wanting to learn how to mod amps (seeing as I am already modding guitars).

I want to retolex my amp (later on,after this project).

I found something I REALLY want to do to this amp.

I want to convert it from a combo to a half-stack (for cosmetic purposes only).
here are some pics from someone elses conversion.















continued...
Guitars:

1998 Squier Affinity Stratocaster

Amps:

Peavey Valve king 112

Money is just paper, but it affects people like poetry.
#2
continued.













I have enough would to build the head cabinet and the accent pieces.

But I need help on how to wire it (making the speaker wire longer).

would it be as simple as finding where the speaker wire are attached to on the mother board and desolder them and then find a longer cable (with a thick protective coating) and solder it on at those points or would it be easier to just add a speaker out jack to the cab and buy a speaker cable to connect them?

I will eventually build a either 2x12 or 4x12 for this (and future amp purchases) so I was thinking the speaker out option for the cab would be best.

opinions?

tips?

Btw I will be retolexing this in orange (cab and head) with mahogany accent pieces.
Guitars:

1998 Squier Affinity Stratocaster

Amps:

Peavey Valve king 112

Money is just paper, but it affects people like poetry.
#3
That looks good... Nice project!

And yes, a speaker output on the head is the best choice, because then you can connect it to different cabs (but keep in mind that you have to respect the impedance limits).
Squier "VMC" Stratocaster
PRS SE Singlecut
tc electronic polytune
CMAT MODS Signa Drive
Blakemore Effects Deus Ex Machina
DIY gaussmarkov Dr. Boogey
EHX Small Clone
Mooer ShimVerb
DIY Beavis Devolt
T-REX Fuel Tank Chameleon
Ampeg GVT52-112
#4
there is already a speaker out jack on the head lol.

I was thinking about putting one on the cab lol
Guitars:

1998 Squier Affinity Stratocaster

Amps:

Peavey Valve king 112

Money is just paper, but it affects people like poetry.
#6
Quote by williamdllr
there is already a speaker out jack on the head lol.

I was thinking about putting one on the cab lol

Sorry, i guess i didn't read with enough attention.

But yes, put one in the cab, and you can use it with different heads. Good idea nonetheless.
I know i could use a smaller cab (2x12" would be nice) to use with my amp head sometimes.
Squier "VMC" Stratocaster
PRS SE Singlecut
tc electronic polytune
CMAT MODS Signa Drive
Blakemore Effects Deus Ex Machina
DIY gaussmarkov Dr. Boogey
EHX Small Clone
Mooer ShimVerb
DIY Beavis Devolt
T-REX Fuel Tank Chameleon
Ampeg GVT52-112
#7
Quote by igordubai
this guy likes to say lol


how is that in any shape,way,or form helpful?

please refrain from spamming.

And not to spam myself:

1.)would sealing the holes from where I take the head out of the combo be better?

I know that a sealed cab has alot more bass while a open backed cab has more treble but would leaving those holes make it sound bad?

or would they cut down the bass and add a little more treble?(would help a lil bit)

Quote by Linkerman
Sorry, i guess i didn't read with enough attention.

But yes, put one in the cab, and you can use it with different heads. Good idea nonetheless.
I know i could use a smaller cab (2x12" would be nice) to use with my amp head sometimes.


No worries man.

Thats what I was thinking,Building a 2x12 AND a 4x12 for different gigs and what not.
Guitars:

1998 Squier Affinity Stratocaster

Amps:

Peavey Valve king 112

Money is just paper, but it affects people like poetry.
Last edited by williamdllr at Jan 9, 2010,
#8
Quote by williamdllr
would sealing the holes from where I take the head out of the combo be better?

I know that a sealed cab has alot more bass while a open backed cab has more treble but would leaving those holes make it sound bad?

or would they cut down the bass and add a little more treble?(would help a lil bit)

I think you should try before sealing the holes, to see how it sounds.
Then, if you decide you'd like a bit more bass, you can always seal them afterwards.

Quote by williamdllr
Thats what I was thinking,Building a 2x12 AND a 4x12 for different gigs and what not.

Exactly.
For bedroom playing i like to have the 4x12", because gives me plenty headroom and it just sits there. For the ocasional gig, i don't mind lugging this behemoth around.

But for the weekly band practice, for example, it would be nice to have a small, light cab... That way i would take the Laney head with me instead of my Fender Frontman 15G.
Or sometimes, when i want to play in my house's garage, it would be easier to carry a small cab downstairs instead of the 4x12".


You should keep your options as open as possible, that's my opinion.
Squier "VMC" Stratocaster
PRS SE Singlecut
tc electronic polytune
CMAT MODS Signa Drive
Blakemore Effects Deus Ex Machina
DIY gaussmarkov Dr. Boogey
EHX Small Clone
Mooer ShimVerb
DIY Beavis Devolt
T-REX Fuel Tank Chameleon
Ampeg GVT52-112
#9
Variety is the spice of life.

I can see why you would rather take your Laney head and a small cab over your Frontman

I have been reading up on building cabs and it seems really simple.

within the nest month I will be building mine (if money permits).

quick question about ohms.

If i build a 4x12 and my head has a 8 ohm speaker output,each one of your speakers has to be 8 ohms right?
Guitars:

1998 Squier Affinity Stratocaster

Amps:

Peavey Valve king 112

Money is just paper, but it affects people like poetry.
#10
Quote by williamdllr

If i build a 4x12 and my head has a 8 ohm speaker output,each one of your speakers has to be 8 ohms right?


No, the total impedance has to be 8 ohms.

Speakers work like resistors so you just need to work out the resistance to make it add up to 8 ohms.

Easiest way would probably be to get four 16 ohm speakers and wire it all parallel.
#11
Quote by williamdllr
If i build a 4x12 and my head has a 8 ohm speaker output,each one of your speakers has to be 8 ohms right?

Sorry i can't help you with that; i'd like to know it myself.

Can anyone explain it, please?

Sadly, i never understood how the whole impedance concept works. I just know that you have to be very careful, or you'll risk damaging the equipment.

Also (and you probably already know this, but it's never a bad idea to remind) keep in mind that you can't connect an amp head to the cabinet with a normal instrument cable.
You have to use a speaker cable, or you may damage the amp head.


Btw, this is from my Laney's owner manual, dunno if it helps:
The head has twin loudspeaker sockets with a minimum 4 Ohm impedance.
The total impedance of the cabinet/s must not be less than 4 Ohms. Connecting cabinets that have a lower impedance than 4 Ohms will result in the amplifier overheating. Continual use in this manner may cause permanent damage. Permitted configurations could be 1x4Ohm, 1x8Ohm, 2x8Ohm, or 2x16Ohm cabinets.
Squier "VMC" Stratocaster
PRS SE Singlecut
tc electronic polytune
CMAT MODS Signa Drive
Blakemore Effects Deus Ex Machina
DIY gaussmarkov Dr. Boogey
EHX Small Clone
Mooer ShimVerb
DIY Beavis Devolt
T-REX Fuel Tank Chameleon
Ampeg GVT52-112
#12
Quote by Linkerman
Sorry i can't help you with that; i'd like to know it myself.

Can anyone explain it, please?

Sadly, i never understood how the whole impedance concept works. I just know that you have to be very careful, or you'll risk damaging the equipment.

Also (and you probably already know this, but it's never a bad idea to remind) keep in mind that you can't connect an amp head to the cabinet with a normal instrument cable.
You have to use a speaker cable, or you may damage the amp head.


Btw, this is from my Laney's owner manual, dunno if it helps:


I explained in the post above.


Also, I've never heard of having to use a different "speaker cable" instead of an instrument cable...
#13
Quote by Bigsteve92
Also, I've never heard of having to use a different "speaker cable" instead of an instrument cable...

That i can assure you; if you use a standard instrument cable to connect your amp head to the cabinet, you may damage it.
You need to use specific speaker cable to handle the signal.

My speaker cable isn't even factory made.
It was custom made for me, because i wanted an angled plug in one end (so that i could have the cabinet back as close to my bedroom's wall as possible) and a straight in the other.

I can post a pic of it if you'd like, Bigsteve.
Squier "VMC" Stratocaster
PRS SE Singlecut
tc electronic polytune
CMAT MODS Signa Drive
Blakemore Effects Deus Ex Machina
DIY gaussmarkov Dr. Boogey
EHX Small Clone
Mooer ShimVerb
DIY Beavis Devolt
T-REX Fuel Tank Chameleon
Ampeg GVT52-112
#14
Quote by Linkerman
Also (and you probably already know this, but it's never a bad idea to remind) keep in mind that you can't connect an amp head to the cabinet with a normal instrument cable.
You have to use a speaker cable, or you may damage the amp head.


I've never heard that before anywhere, and I don't see how it could hurt it.

edit:
Quote by Linkerman
That i can assure you; if you use a standard instrument cable to connect your amp head to the cabinet, you may damage it.
You need to use specific speaker cable to handle the signal.

My speaker cable isn't even factory made.
It was custom made for me, because i wanted an angled plug in one end (so that i could have the cabinet back as close to my bedroom's wall as possible) and a straight in the other.

I can post a pic of it if you'd like, Bigsteve.


how exactly would it damage the head?
Last edited by The4thHorsemen at Jan 9, 2010,
#15
Quote by The4thHorsemen
I've never heard that before anywhere, and I don't see how it could hurt it.

edit:

how exactly would it damage the head?

I don't know exactly how, but i know that a standard instrument cable can't handle the signal transmitted from the head to the cab.

I also thought it was strange at first, but at 3 different local stores they told me the same thing, and here in UG multiple users confirmed it.

Look here, for example.
You can see the different cable categories.

I'll try to find the thread where i originally asked this, and if i find it, i'll post a link here as well.


EDIT:
THIS THREAD:

https://www.ultimate-guitar.com/forum/showthread.php?t=1100810&highlight=speaker+cable
(it's not mine, but it's pretty complete in information)
Squier "VMC" Stratocaster
PRS SE Singlecut
tc electronic polytune
CMAT MODS Signa Drive
Blakemore Effects Deus Ex Machina
DIY gaussmarkov Dr. Boogey
EHX Small Clone
Mooer ShimVerb
DIY Beavis Devolt
T-REX Fuel Tank Chameleon
Ampeg GVT52-112
Last edited by Linkerman at Jan 9, 2010,
#16
hm, I didn't know that. I guess maybe the the inner conductor of an instrument cable isn't big enough to handle the current.
#17
Well I'm glad that's been sorted out cuz it would pretty much suck for me to do this mod and then have it burn out lol.

I would probably cry.
Guitars:

1998 Squier Affinity Stratocaster

Amps:

Peavey Valve king 112

Money is just paper, but it affects people like poetry.
#18
I also just figured out another problem!.

since the controls would be facing the front instead of on top how would I have the speaker out and line out jacks in the back of the head!

I want this to look as clean as possible
Guitars:

1998 Squier Affinity Stratocaster

Amps:

Peavey Valve king 112

Money is just paper, but it affects people like poetry.
#19
Quote by williamdllr
since the controls would be facing the front instead of on top how would I have the speaker out and line out jacks in the back of the head!

You'll have to reroute the wiring.

Btw, do you have the schematics for your amp?
If not, you should e-mail Vox and ask if they can send them to you.

Try to plan everything before actually starting to take your amp apart.
If you have all the building steps planned beforehand, it will be easier for you to sort out minor inconveniences that may pop up.
Squier "VMC" Stratocaster
PRS SE Singlecut
tc electronic polytune
CMAT MODS Signa Drive
Blakemore Effects Deus Ex Machina
DIY gaussmarkov Dr. Boogey
EHX Small Clone
Mooer ShimVerb
DIY Beavis Devolt
T-REX Fuel Tank Chameleon
Ampeg GVT52-112
#20
I planned on having everything layed out in front of me and all the supplies and what noit before even disassembling my amp.

the only thing I have done to it is take the back cover off to take the edge off the bass.

I hope they will send me the schematics
Guitars:

1998 Squier Affinity Stratocaster

Amps:

Peavey Valve king 112

Money is just paper, but it affects people like poetry.
#21
I have found the schematics (thank you valvetronix.net for the service manual!!).

but no one has answered my question about the soldering thing.

any help is greatly appreciated
Guitars:

1998 Squier Affinity Stratocaster

Amps:

Peavey Valve king 112

Money is just paper, but it affects people like poetry.