Marshall DSL 2000 gutted and rebuilt into a fiery ground shaking monster of an amplifier by Doug of Duo.Glassix. This amp combines charachteristics and circuts of a couple different well known amps. The resulting sound is that of Neal Youngs amplifier meets Zakk Wyldes amp and when the master volume is unleashed does not just thump your chest but rips your heart out and stomps on it! It has been called the meanest sounding amplifier on the face of the planet! I constructed an A/B/Y footpedal to take advantage of the parallel interactive channels (why is this feature not utilized more often). When channel 1 turned up all the way you get this sweet natural amp distortion while channel 2 if turned up 2/3rds of the way yeilds a deliciously warm woody clean jazzy sound that is to die for! The volume difference between the 2 channels is perfect for hitting that stinging solo tone while backing off the guitars volume cleans it up very nicely indeed. Some one asked for the schematics so here ya go! Enjoy!
————————————
 |
| From Marshall DSL 2000 ripped out by the guts! |
This is the rectifier and power filtering circuitry.
It is pretty standard faire.
It uses a typical bridge rectifier with a 10H choke.
There are a pair of totem pole filters and a pair of Pi filters.
Also a negative bias supply circuit.
Also a 6.3 VAC heater circuit rated at 7 amps.
————————————
 |
| From Marshall DSL 2000 ripped out by the guts! |
This is the power amplifier and phase splitter.
The output stage includes a pair of parallel speaker jacks.
There is a 4,8,16 ohm impedance selector swith.
Also a line out jack to connect straight to the board.
The Presence knob attenuates the high end sizzle.
This is a long tailed pair phase splitter.
It drives this quad of EL34’s into fire-breathing mode!
————————————
 |
| From Marshall DSL 2000 ripped out by the guts! |
Here is where the magic is made.
This preamp has a pair of parallel triodes.
There is a bridge switch on the cathodes.
It induces interactive vvolume controls on the channels.
Next is a cathode follower tone drive stage.
It and the tone stack are the same circuit used it a JTM45.
The master volume circuit is that of a typical JCM800 2203.
These two circuits together provide for some really amazing tones.
——————————-
 |
| Marshall DSL 2000 ripped out by the guts! |
Filed under: Amplifiers, Gallery, Gear, Guitars |
Did you need to add another 20 amp power service to make it go ? Looks like it should make lots of great sound – and cause a jump in the power bill !! 🙂
NICE !!
Nah its not to bad really. I haven’t really measured current consumption but I figure it to be pretty low since there are no hybrid relays or bunch of chips to power. The voltage at PSU A is 425 volts DC. Since we know volts or E time amps or I equals watts we can figure 425*I=100 So using this simple ohms law calculation you can surmise the entire amplifiers current draw is 0.2352 amperes Now add in the 5 amps of current for the heater circuit and we come up with less than 6 amps for the entire 100 watt amplifier. Thats not great efficiency, but compared to similar amplifiers its right where it should be. If we double the amperage for a safety margin it would run fine from a 10 amp breaker! Incidentaly the amplifier uses a 5 ampere fuse in the AC fuse socket and a 1 amp fuse in the DC side.
Right on!
[…] found this article on Hack-A-Day website. Some of you may recall my 100 watt custom monster amp post but even it in all its awesome glory is super small potatoes to this […]
Hey there, I think your site might be having browser compatibility issues.
When I look at your blog in Opera, it looks fine but when opening
in Internet Explorer, it has some overlapping. I just wanted to
give you a quick heads up! Other then that, terrific blog!
[…] found this article on Hack-A-Day website. Some of you may recall my 100 watt custom monster amp post but even it in all its awesome glory is super small potatoes to this […]