Hi,
I have already an acoustic guitar amp Carlsbro of 65W. I want to build my self a bigger preamp, not the best quality, just fonctionnal for this price.
For the choice of the power, you must look at the power of the speaker !
I have multiple choice, here is the caracteristics : (rms/peak/r)
4*10" in 270/600/4R for 80€
2*12" in 240/400/8R for 60€
2*12" in 360/400/4R for 80€
What is the best choice and what is the better power of the amp for this best choice please ?
Thanks 🙂
I have already an acoustic guitar amp Carlsbro of 65W. I want to build my self a bigger preamp, not the best quality, just fonctionnal for this price.
For the choice of the power, you must look at the power of the speaker !
I have multiple choice, here is the caracteristics : (rms/peak/r)
4*10" in 270/600/4R for 80€
2*12" in 240/400/8R for 60€
2*12" in 360/400/4R for 80€
What is the best choice and what is the better power of the amp for this best choice please ?
Thanks 🙂
Has the Carlsbro not a tweeter? for acoustic guitar I find this gives not merely extra clarity, but extra spread. The four by ten will lift the signal further back down the audience, and beam less, and if you're playing with other musicians the extra thickness give by the bigger cones is more a nuisance than an advantage. If you're playing alone, consider a small PA set up; it will generally give better distribution rather than hot spots and dead areas. More power also means more risk of feedback; will you be sitting behind this amp and feeding to the public, or using it as your personal monotor as most electric guitarist do?
Hi, thanks for all, it's very instructive 🙂
My carlsbro has a tweeter, it's right ! I play in solo ... https://www.google.fr/search?q=tete...UYexDcmXhQfyo4HYDQ#biv=i|73;d|3LJdb03QU6-eoM: In fact, I want to build a system like this !
So I think build an amp head and a speaker. Example, one type of speaker, a big head with one mono amp and when I have more dollars, I can build a second same amp with a second same speaker ... Have y ou understand my idea ?
Thanks for your advise 🙂
My carlsbro has a tweeter, it's right ! I play in solo ... https://www.google.fr/search?q=tete...UYexDcmXhQfyo4HYDQ#biv=i|73;d|3LJdb03QU6-eoM: In fact, I want to build a system like this !
So I think build an amp head and a speaker. Example, one type of speaker, a big head with one mono amp and when I have more dollars, I can build a second same amp with a second same speaker ... Have y ou understand my idea ?
Thanks for your advise 🙂
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Hi,
I want to build first something like this Marshall - 1936V - La Boite Noire du Musicien
After I want a cheap amp for best use of a speaker like this, it's all ! Very simple for sound pro 🙂
thanks !
I want to build first something like this Marshall - 1936V - La Boite Noire du Musicien
After I want a cheap amp for best use of a speaker like this, it's all ! Very simple for sound pro 🙂
thanks !
Dear ripx, I think you are speaking about two very different things here.
You have an *acoustic guitar* amplifier, which even has a tweeter; and you show pictures of Rock/Metal Marshall amplifiers and their cabinets, quite the opposite.
Please define what type of sound and music you want to play, and what guitar you intend to use.
You have an *acoustic guitar* amplifier, which even has a tweeter; and you show pictures of Rock/Metal Marshall amplifiers and their cabinets, quite the opposite.
Please define what type of sound and music you want to play, and what guitar you intend to use.
Hi,
Sorry, I misspok ... So, I have acoustic guitars and electric guitars. I have good acoustic amp but not a electric amp. For don't broken my acoustic amp, I want to build an big electric amp ... And, additionnal, during a little representation, I have try my acoustic guitar on a electric amp : not the best sound, but is working, this is all what I mean 😉
The final is I want to built a power amp for a speaker like the first post 🙂
Thanks !
Sorry, I misspok ... So, I have acoustic guitars and electric guitars. I have good acoustic amp but not a electric amp. For don't broken my acoustic amp, I want to build an big electric amp ... And, additionnal, during a little representation, I have try my acoustic guitar on a electric amp : not the best sound, but is working, this is all what I mean 😉
The final is I want to built a power amp for a speaker like the first post 🙂
Thanks !
When you play electric guitar, the amp and speaker are an extension of the instrument. Generally the frequency response of the speaker is not very good (in HiFi terms; it's right for the purpose) and the amp not very linear.
When you play acoustic, the speaker/amp system is attempting to reproduce the sound of the instrument – a very different problem. Lots of clean high frequencies that would sound excruciatingly sharp with even slightly distorted signal. Like a little PA system.
Essentially, never the twain shall meet. For an equivalent loudness, you need a lot less power (and frequently quite a bit more gain – go figure) for the electric:- I've had thirty watt guitar amps that I've had to ask the guitarist to turn toward himself because they were overpowering a two hundred watt bass and a drum kit (not 'turn down'. Turn away from the audience.)
I have custom built amps to do both, but it's complicated and generally involves getting the electric sound with a tiny amp, then running the output of this into a big, clean amp, mixed with the low frequency signal from an electronic crossover from the acoustic. Takes a lot of setting up, and entirely separate channels (with a stereo pot for the master volume wired very strangely🙂). Normally it's easier to have separate amps (a lot of guitarists actually DI into the PA for acoustic, but this involves being certain there will be a PA; small gigs this isn't always the case.
Traduction suit
Quand on jou de la guitare electrique, l'ampli et l'haut parleur sont un extension de l'instrument. En générale l'ampli sature pas mal, et l'haut parleur n'a pas une réponse de frequence extrordinaire, particlairement dans les hyper aigues.
Pour une guitar acoustique on essaie de reproduire le son original de l'instrument – très different comme problème. Beaucoup des hautes fréquences propres, qui seraient très disagreables avec même un peu de distortion. Comme un petit sono, en effet.
Alors, c'est très difficile de fabriquer un ampli qui fait les deux. J'en ai fabriqué deux, qui essentialement avait un tout petit ampli pour l'éléctrique, qui était melangé avec le sorti graves d'une crossover éléctronique pour l'acoustique, avec un ampli séparé pour le tweeter et des aigues acoustique. A part le transport, c'est probablement plus simple d'avoir deux systèmes independants.
Mais un guitare éléctrique a besion de beaucoup moins de puissance pour un impression de volume équivalent - un vox AC30 est assez forte pour donner des problèmes à une sono dans un stade (Oui, c'est des tubes, qui sonne toujours plus forte pour une puissance équivalent. Mais, quand même.) Et plusiers guitaristes qui jouent les deux branche l'acoustique dans un DI et direct dans le sono; mais pour ça il faut avoir confience que le sono va être là: pas toujour le cas avec des concerts plus restraints.
When you play acoustic, the speaker/amp system is attempting to reproduce the sound of the instrument – a very different problem. Lots of clean high frequencies that would sound excruciatingly sharp with even slightly distorted signal. Like a little PA system.
Essentially, never the twain shall meet. For an equivalent loudness, you need a lot less power (and frequently quite a bit more gain – go figure) for the electric:- I've had thirty watt guitar amps that I've had to ask the guitarist to turn toward himself because they were overpowering a two hundred watt bass and a drum kit (not 'turn down'. Turn away from the audience.)
I have custom built amps to do both, but it's complicated and generally involves getting the electric sound with a tiny amp, then running the output of this into a big, clean amp, mixed with the low frequency signal from an electronic crossover from the acoustic. Takes a lot of setting up, and entirely separate channels (with a stereo pot for the master volume wired very strangely🙂). Normally it's easier to have separate amps (a lot of guitarists actually DI into the PA for acoustic, but this involves being certain there will be a PA; small gigs this isn't always the case.
Traduction suit
Quand on jou de la guitare electrique, l'ampli et l'haut parleur sont un extension de l'instrument. En générale l'ampli sature pas mal, et l'haut parleur n'a pas une réponse de frequence extrordinaire, particlairement dans les hyper aigues.
Pour une guitar acoustique on essaie de reproduire le son original de l'instrument – très different comme problème. Beaucoup des hautes fréquences propres, qui seraient très disagreables avec même un peu de distortion. Comme un petit sono, en effet.
Alors, c'est très difficile de fabriquer un ampli qui fait les deux. J'en ai fabriqué deux, qui essentialement avait un tout petit ampli pour l'éléctrique, qui était melangé avec le sorti graves d'une crossover éléctronique pour l'acoustique, avec un ampli séparé pour le tweeter et des aigues acoustique. A part le transport, c'est probablement plus simple d'avoir deux systèmes independants.
Mais un guitare éléctrique a besion de beaucoup moins de puissance pour un impression de volume équivalent - un vox AC30 est assez forte pour donner des problèmes à une sono dans un stade (Oui, c'est des tubes, qui sonne toujours plus forte pour une puissance équivalent. Mais, quand même.) Et plusiers guitaristes qui jouent les deux branche l'acoustique dans un DI et direct dans le sono; mais pour ça il faut avoir confience que le sono va être là: pas toujour le cas avec des concerts plus restraints.
Hi,
Thanks, I want just build an electric guitar amp. When it finished, I try with my acoustic just for fun, but it's not the objective 🙂
Thanks, I want just build an electric guitar amp. When it finished, I try with my acoustic just for fun, but it's not the objective 🙂
OK. Questions:-
1) What style of music?
2) How many people are you expecting to play for (before requiring a PA – ie not festivals or stadium gigs)?
3) What mode of transport?
4) Have you tried any existing amps which have pleased you/given you reasons to avoid them?
5) Are you determined to build everything yourself, or is matching commercial bits with custom construction on the cards?
6) Tube, transistor or hybrid? It's pretty certain tubes sound better for instruments, but when it comes to hauling gear around the lack of output transformer and occasional switch mode power supply make the transistor very attractive.
7) Do you always play the same style of gig? It could be easier to have a small combo which goes easily into a domestic car, and can drive a larger amplified cabinet for bigger gigs.
Oui, je sais; je suis anglophone, mais j'ai besoin d'ameillorer mon écriture en français.
1) Quelle style de musique vous pratiquez?
2) Devant combien du monde vous attendez jouer avant de passer par un sono?
3) Quelle moyen de transport?
4) Est-que vous avez dèja essayé les amplis commercials qui vous a plu, où deplu, et pour quelles raisons (ignorent l'evident "le prix"🙂)?
5) Est-ce que vous voudrez tout bricoler vous même, ou mélanger commercial et custom est il un option?
6) A lampe, transistor ou hybride (un peu près tout le monde est d'accord que le son des lampes est mieux, mais des fois le poids et le prix priment contre eux)
7) Vous jouez toujours le même style de spectacle? Ou un petit combo avec un beau son qui peut brancher dans un HP amplifié beaucoup plus puissant semble une idée à creuser?
1) What style of music?
2) How many people are you expecting to play for (before requiring a PA – ie not festivals or stadium gigs)?
3) What mode of transport?
4) Have you tried any existing amps which have pleased you/given you reasons to avoid them?
5) Are you determined to build everything yourself, or is matching commercial bits with custom construction on the cards?
6) Tube, transistor or hybrid? It's pretty certain tubes sound better for instruments, but when it comes to hauling gear around the lack of output transformer and occasional switch mode power supply make the transistor very attractive.
7) Do you always play the same style of gig? It could be easier to have a small combo which goes easily into a domestic car, and can drive a larger amplified cabinet for bigger gigs.
Oui, je sais; je suis anglophone, mais j'ai besoin d'ameillorer mon écriture en français.
1) Quelle style de musique vous pratiquez?
2) Devant combien du monde vous attendez jouer avant de passer par un sono?
3) Quelle moyen de transport?
4) Est-que vous avez dèja essayé les amplis commercials qui vous a plu, où deplu, et pour quelles raisons (ignorent l'evident "le prix"🙂)?
5) Est-ce que vous voudrez tout bricoler vous même, ou mélanger commercial et custom est il un option?
6) A lampe, transistor ou hybride (un peu près tout le monde est d'accord que le son des lampes est mieux, mais des fois le poids et le prix priment contre eux)
7) Vous jouez toujours le même style de spectacle? Ou un petit combo avec un beau son qui peut brancher dans un HP amplifié beaucoup plus puissant semble une idée à creuser?
Hi !
Ton français est parfaitement compréhensible, c'est bien 😉
so ...
1) I hav'nt any styles of music. I like rock but sometimes, metal, or jazz can make me happy 😉
2) I play in solo in my house, but I like power of sound and I hav'nt neightbours !! (demoniac idea no ?)
3) so, no transport, just stay in my house !
4) really, no ... I have the carlsbro, I love it but it's not the same usage !
5) I made ALL myself (pcb, drilling, soldering ... all) but with an existent schematics and pcb design 😉
6) tube is interessant, but an another time 😉 I want something powerfull and relatively cheap, so I think transistors is my way 🙂
7) A big amp with big speakers like firt post; little combo it's for an another time
Thanks for all !
Ton français est parfaitement compréhensible, c'est bien 😉
so ...
1) I hav'nt any styles of music. I like rock but sometimes, metal, or jazz can make me happy 😉
2) I play in solo in my house, but I like power of sound and I hav'nt neightbours !! (demoniac idea no ?)
3) so, no transport, just stay in my house !
4) really, no ... I have the carlsbro, I love it but it's not the same usage !
5) I made ALL myself (pcb, drilling, soldering ... all) but with an existent schematics and pcb design 😉
6) tube is interessant, but an another time 😉 I want something powerfull and relatively cheap, so I think transistors is my way 🙂
7) A big amp with big speakers like firt post; little combo it's for an another time
Thanks for all !
Good.
So it's simple/SS/not expensive/you can make your PCBs/loud (100W is fine).
Then to stay within simple yet properly designed stuff, Rodd Elliott's projects are fine.
At least have a look at them for reference.
Search for rod elliott project 27
Note: at this very moment I can't get in there, probably some server problem, try later.
He publishes a 100W amplifier, and a basic preamp.
Excellent (Fendery) clean sound, you can add any distortion you like.
Couple it to 2 good 12" guitar speakers and you'll play anywhere (or annoy your neighbours 😉 )
So it's simple/SS/not expensive/you can make your PCBs/loud (100W is fine).
Then to stay within simple yet properly designed stuff, Rodd Elliott's projects are fine.
At least have a look at them for reference.
Search for rod elliott project 27
Note: at this very moment I can't get in there, probably some server problem, try later.
He publishes a 100W amplifier, and a basic preamp.
Excellent (Fendery) clean sound, you can add any distortion you like.
Couple it to 2 good 12" guitar speakers and you'll play anywhere (or annoy your neighbours 😉 )
Right, I think first thing to do is go down to your local music shop – they do have magazins de musique in pas de Calais, j'espère? Sinon, Douvres – and try out five or six guitar amps. You don't need to tell them you're going to build it yourself. Make notesabout the sounds of the amps for different styles; since there's no absolute reference for "good" sound (unlike HiFi amps, there's a certain tendency to specialise in blues sounds, or metal distortion, or digital amp simulation (at which point I drop out of the conversation). Who knows, you might even find one that's the right price and suits you (Yeah, not over likely. And it takes a lot of the fun out of the operation).
Theoretically, with solid state amps (which includes the digital beasts) the sound is modeled in the preamp (and in the choice of loudspeakers), while the power stages run relatively distortion free (but I wouldn't bet much money on it).
For power/volume, a single twelve cabinet would be adequate; you can get modern twelves that take 250 watts of guitar without complaining, and the reason I don't like this solution on stage is the directivity. This shouldn't be a problem at home, unless you dance around a lot.
There's no absolute rule, but bigger cones tend towards a richer sound, smaller ones more precision. Almost invariably when you've a guitarist and bassist playing together the guitarist puts too much low end and needs filtering so he doesn't mush up the bass sound, but if you're playing solo at home this shouldn't be a factor. I'm used to concerts, studio, tours, and designing for transportability and toughness; I suppose here we could use a poured concrete cabinet if desired (I assume lack of WAF?)
And when you know which sound suits you, we can start harvesting preamp circuits.
Theoretically, with solid state amps (which includes the digital beasts) the sound is modeled in the preamp (and in the choice of loudspeakers), while the power stages run relatively distortion free (but I wouldn't bet much money on it).
For power/volume, a single twelve cabinet would be adequate; you can get modern twelves that take 250 watts of guitar without complaining, and the reason I don't like this solution on stage is the directivity. This shouldn't be a problem at home, unless you dance around a lot.
There's no absolute rule, but bigger cones tend towards a richer sound, smaller ones more precision. Almost invariably when you've a guitarist and bassist playing together the guitarist puts too much low end and needs filtering so he doesn't mush up the bass sound, but if you're playing solo at home this shouldn't be a factor. I'm used to concerts, studio, tours, and designing for transportability and toughness; I suppose here we could use a poured concrete cabinet if desired (I assume lack of WAF?)
And when you know which sound suits you, we can start harvesting preamp circuits.
Thanks guys !
Oh yes, the preamps ... 😛
So tomorrow I go to the music shop for test any amp I can find 😀
If I resume :
I plug the guitar in the preamp (for gain and sound modification) and I plug the preamp to the amp, which amplify the sound as he is sent. Is right ?
For the power of the amp, I would like to fully load (with a safety margin) my speaker !
So, first 2*12" is 240w/8r and second is 360w/4r ... I think 200~220w/8r or 300~350w/4r is the best for me ! It's possible to find this ?
Thanks, very amazing forum 😀
Oh yes, the preamps ... 😛
So tomorrow I go to the music shop for test any amp I can find 😀
If I resume :
I plug the guitar in the preamp (for gain and sound modification) and I plug the preamp to the amp, which amplify the sound as he is sent. Is right ?
For the power of the amp, I would like to fully load (with a safety margin) my speaker !
So, first 2*12" is 240w/8r and second is 360w/4r ... I think 200~220w/8r or 300~350w/4r is the best for me ! It's possible to find this ?
Thanks, very amazing forum 😀
The preamp and the power amp don't have to be separated, it's just convenient conceptually (and for testing).
A four ohm cabinet is easier to find that sort of power (are you sure you need that loud? Or are you just working to the theory that if it's too much you can always turn it down, whereas if it lacks the power, that's it? I'm not saying the argument's wrong, mind).
Power amplifiers in that range are easy to find as modules, as circuit boards, as circuit diagrams… and are not expensive nowadays. Preamps are so much a question of taste.
A four ohm cabinet is easier to find that sort of power (are you sure you need that loud? Or are you just working to the theory that if it's too much you can always turn it down, whereas if it lacks the power, that's it? I'm not saying the argument's wrong, mind).
Power amplifiers in that range are easy to find as modules, as circuit boards, as circuit diagrams… and are not expensive nowadays. Preamps are so much a question of taste.
Hi,
For the design of the box and all this build's part, I can think later 🙂
For the power, I like to fully loading my speaker if I want, it's just a question of components balance ! And, as you mind, I can always turn down the volume if I want ... What think you of this idea ?
For preamps, I would like to something transparent with not or not to special sound. I can always add an effects pedal or box. I would like to plug a bass or a guitar without modifications, it's possible ?
For the "rod elliott project 27", amp is cool but not very powerfull. And, there is a bass version and a guitar version. Can I find a universal preamp ?
Thanks
For the design of the box and all this build's part, I can think later 🙂
For the power, I like to fully loading my speaker if I want, it's just a question of components balance ! And, as you mind, I can always turn down the volume if I want ... What think you of this idea ?
For preamps, I would like to something transparent with not or not to special sound. I can always add an effects pedal or box. I would like to plug a bass or a guitar without modifications, it's possible ?
For the "rod elliott project 27", amp is cool but not very powerfull. And, there is a bass version and a guitar version. Can I find a universal preamp ?
Thanks
The Guitar one they show works very well for Bass (without the clipping diodes).
Not the most modern sound, think Blackface or Silverface Bassman, good general purpose sound.
For a very good Bass specific preamp:
The full project, including PCB, proper power supply, how to match FETs, etc:
Bass Preamp
Not the most modern sound, think Blackface or Silverface Bassman, good general purpose sound.
For a very good Bass specific preamp:
An externally hosted image should be here but it was not working when we last tested it.
The full project, including PCB, proper power supply, how to match FETs, etc:
Bass Preamp
An externally hosted image should be here but it was not working when we last tested it.
Ok thanks,
So the rod eliots project preamp is good for bass and guitar ? (I want to be sure to have untersood, just.) And, for this, what is the difference between master and volume ? What is the gain regulation ?
My theory is the amp hav'nt settings so volume is the gain and master is the volume of the amp ... it's right ? And last question, where is the pcb design for the preamp ? EDIT : I just saw that pcb design aren't available and pcb can just ordered. If that's right, I do not like this way ...
Can you advises ma for a 300~350w 4r mono amp ?
Thanks
So the rod eliots project preamp is good for bass and guitar ? (I want to be sure to have untersood, just.) And, for this, what is the difference between master and volume ? What is the gain regulation ?
My theory is the amp hav'nt settings so volume is the gain and master is the volume of the amp ... it's right ? And last question, where is the pcb design for the preamp ? EDIT : I just saw that pcb design aren't available and pcb can just ordered. If that's right, I do not like this way ...
Can you advises ma for a 300~350w 4r mono amp ?
Thanks
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Hi, why ?
It's not my first diy project. I have already build a 100w stereo amp with a pair of speakers. More generally, I make little electronic (games console, cars, pc's, and various repair of power supply) since a few years 😉
Edit : it's this : http://www.eleccircuit.com/2-channel-100w-min-af-power-amplifier-dual-supplies-stk4231ii/
It is almost finished, I have made few test and he sound good ! Now I just made a beautiful box 🙂
It's not my first diy project. I have already build a 100w stereo amp with a pair of speakers. More generally, I make little electronic (games console, cars, pc's, and various repair of power supply) since a few years 😉
Edit : it's this : http://www.eleccircuit.com/2-channel-100w-min-af-power-amplifier-dual-supplies-stk4231ii/
It is almost finished, I have made few test and he sound good ! Now I just made a beautiful box 🙂
Last edited:
you could try one of Holton's modules....High End Audio MOSFET Amplifiers - Amplifier Modules - DIY Amp Modules - DIY Audio - Amp Kit
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