Monoprice 15-Watt, 1x12 Guitar Combo Tube Amplifier with Celestion Speaker & Spring Reverb
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Monoprice 15-Watt, 1x12 Guitar Combo Tube Amplifier with Celestion Speaker & Spring Reverb
15-Watt, 1x12 Guitar Combo Tube Amplifier with Celestion Speaker & Spring Reverb
Ok, it's cheap, but it's a handy little tube amp for $230!
It's not a Fender et al, but it makes noise and it's handy little practice amp with without dragging out the big amp.
What can I do to make it have more tone? Is it possible?
I looked inside and it's circuit board construction. I'd be willing to hard wire it if I could add something to enhance it.
Even use the parts for something better?
3 - 12AX7's pre
2 - EL84's power
Celestion 780 12" speaker
Comments? Suggestions?
Here's a pretty good demo video if interested: https://www.youtube.com/watch?v=RUvsd6-k4xk
Ok, it's cheap, but it's a handy little tube amp for $230!
It's not a Fender et al, but it makes noise and it's handy little practice amp with without dragging out the big amp.
What can I do to make it have more tone? Is it possible?
I looked inside and it's circuit board construction. I'd be willing to hard wire it if I could add something to enhance it.
Even use the parts for something better?
3 - 12AX7's pre
2 - EL84's power
Celestion 780 12" speaker
Comments? Suggestions?
Here's a pretty good demo video if interested: https://www.youtube.com/watch?v=RUvsd6-k4xk
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“The greatest energy of movement will be obtained when synchronism is maintained between the pump impulses and the natural oscillations of the system.” Tesla
Re: Monoprice 15-Watt, 1x12 Guitar Combo Tube Amplifier with Celestion Speaker & Spring Reverb
If you want to convert to a hand-wired amp with those transformers, take a look at any 3 x 12AX7 and 2 x EL84 based amp. For example, you could do a Marshall 18W circuit, or a fender Blues Junior with 1-tube reverb
Or, seeing as how EL84s require 760mA heater juice and 6V6s only require 450mA, convert to octal output tube sockets for a 2 x 6V6 fender based circuit and have enough extra heater juice left over to drive another 2 x 12A_7 tubes, e.g. enough for a Princeton Reverb circuit - or BF Deluxe reverb if you used a MOSFET source follower buffer for the LFO.
Or, seeing as how EL84s require 760mA heater juice and 6V6s only require 450mA, convert to octal output tube sockets for a 2 x 6V6 fender based circuit and have enough extra heater juice left over to drive another 2 x 12A_7 tubes, e.g. enough for a Princeton Reverb circuit - or BF Deluxe reverb if you used a MOSFET source follower buffer for the LFO.
He who dies with the most tubes... wins
Re: Monoprice 15-Watt, 1x12 Guitar Combo Tube Amplifier with Celestion Speaker & Spring Reverb
That's a bit nebulous . . . Have you tried a different speaker, or a separate speaker cabinet?
Is a schematic available? Couldn't find one in 10 seconds on Google. This amp is probably a re-badged unit from an actual guitar amp company, not some unique -to-Monoprice thing.
Re: Monoprice 15-Watt, 1x12 Guitar Combo Tube Amplifier with Celestion Speaker & Spring Reverb
Looks like it is Laney based, like a Cub 12R but with different reverb. It's probably not worth messing with that circuit board. Keep as is or gut it and put something completely new in it.
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Bryan
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Re: Monoprice 15-Watt, 1x12 Guitar Combo Tube Amplifier with Celestion Speaker & Spring Reverb
what is it not providing tone wise now for your needs, I for one have left my Crystal Ball home today if you get my drift?
When I die, I want to go like my Grandfather did, peacefully in his sleep.
Not screaming like the passengers in his car!
Cutting out a man's tongue does not mean he’s a liar, but it does show that you fear the truth he might speak about you!
Not screaming like the passengers in his car!
Cutting out a man's tongue does not mean he’s a liar, but it does show that you fear the truth he might speak about you!
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Re: Monoprice 15-Watt, 1x12 Guitar Combo Tube Amplifier with Celestion Speaker & Spring Reverb
C'mon stevem, get with the times, man! There is now a "Crystal Ball" app for most mobile devices....
Lou Rossi Designs
Printed Circuit Design & Layout,
and Schematic Capture
Printed Circuit Design & Layout,
and Schematic Capture
Re: Monoprice 15-Watt, 1x12 Guitar Combo Tube Amplifier with Celestion Speaker & Spring Reverb
Thanks for the best answer tubeswell. Gutting it is not out of the realm of possibilities! Is there a schematic for the Princeton Reverb you're talking about?tubeswell wrote: ↑Sun Jul 02, 2017 11:02 pm If you want to convert to a hand-wired amp with those transformers, take a look at any 3 x 12AX7 and 2 x EL84 based amp. For example, you could do a Marshall 18W circuit, or a fender Blues Junior with 1-tube reverb
Or, seeing as how EL84s require 760mA heater juice and 6V6s only require 450mA, convert to octal output tube sockets for a 2 x 6V6 fender based circuit and have enough extra heater juice left over to drive another 2 x 12A_7 tubes, e.g. enough for a Princeton Reverb circuit - or BF Deluxe reverb if you used a MOSFET source follower buffer for the LFO.
I think it's a Laney knockoff?
I was hoping to make it sound like a Dumble for those who don't have a crystal ball...
“The greatest energy of movement will be obtained when synchronism is maintained between the pump impulses and the natural oscillations of the system.” Tesla
Re: Monoprice 15-Watt, 1x12 Guitar Combo Tube Amplifier with Celestion Speaker & Spring Reverb
It's apparently a Laney Cub 12R:
http://www.electricalaudio.com/phpBB3/v ... &p=1972661
https://ampstack.wordpress.com/2013/05/ ... ombo-guts/
http://www.laney.co.uk/products/cub12r/
It's a PCB amp with board-mounted sockets and a very small chassis. To me, it would be a lousy candidate to try to make into something else. If you can't get the sound you want from some combination of tube- and speaker-rolling and pedals, I would move on from it.
http://www.electricalaudio.com/phpBB3/v ... &p=1972661
https://ampstack.wordpress.com/2013/05/ ... ombo-guts/
http://www.laney.co.uk/products/cub12r/
It's a PCB amp with board-mounted sockets and a very small chassis. To me, it would be a lousy candidate to try to make into something else. If you can't get the sound you want from some combination of tube- and speaker-rolling and pedals, I would move on from it.
Re: Monoprice 15-Watt, 1x12 Guitar Combo Tube Amplifier with Celestion Speaker & Spring Reverb
Interesting - Looks like there's enough room in that Laney Cub chassis for hand-wiring a new circuit (including mounting fresh sockets etc). Another option could be to obtain a compatible fender tweed type chassis that would fit into the gap (or fabricate your own tweed style chassis from 2mm aluminium).
But as drew implies, the pennies start to add up. If you really want to get into exploring your inner craving to make and mod tube amps, be aware that there is a price to pay.
But as drew implies, the pennies start to add up. If you really want to get into exploring your inner craving to make and mod tube amps, be aware that there is a price to pay.
He who dies with the most tubes... wins