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1. Marshall Lead 12 Clean

Start by swapping op-amps, you can use all the op-amps that are used with Tubescreamers and they can all be found on ebay.Change the pots to mil spec as the replacements have a life of about 5 years. I use 3 turn pots that let me dial in the tone allot more precise. Same exact amount of resistance on the eq just it now takes 3 turns from 0-10, I use my ear to more finely dial it in where I want.I wire the line outs to an American made Iron core transformer that knocks all signals down to 150 ohm. Balanced out and I add the XLR on the back. This makes a world of difference in the amount of hum I get when I use the XLR to go into a DAW.

Those are the beginner mods I have been doing for 20 years on these amps, if you want to move on to pro mods you can change the EQ by varying the pot values and you can always change the filter caps in the power supply section to be on the safe side, since they may be from 1985. The jacks need to be changed on older units and again using the same jacks they used is going to have a very definite life span, I would venture into using some high quality panel mount stuff and mount the pots to the board with wire so you can float the board in the chassis and use any replacement parts you want as opposed to being stuck with specialized PC board mounted NOS parts. I have seen the same pot values used on almost all the amps made and I tend to think they had been chosen on the lines of what the factory had tons of and not what the circuit warranted.

Then again I could be a little crazy from playing loud guitar all my life, I am not by any means a trained electronics engineer, I am just a tinkerer.My short list of favorite op-amps:TI MC1458p (The original)LF353n (a higher quality amp that some people like)RC4558p (typcal TS type op-amp but purists want the JRC only.JRC4558p (the original TS-808 amp).

Amp trs simple in its use. 30 watt amplifier transistors, 2 inputs and a footswitch.UTILIZATIONI bought it new but no manual. So rock & roll. Just like her! No heat lamps, but the amps sound very fat even when to have fun at home. I had a branch above, but ct just crunch the amp enough.

One branch, turn the knobs and away you go. Foncirement, the clear, ultra-saturated is not his forte, but putting prs little dirty while half of that wish: opSOUNDSI used it diffrent guitars (pickups simple humbuckers) and my guitar is a copy dernire musicman on which I mount of Seymour Duncan a double bridge and a double major in Splitt) and I found the sound I wanted (with the power that can not get back all my family)OVERALL OPINIONFter we will both our 25 years together in 2008.

He was always home except for a recording studio, rpt 'or in concert it is unfortunately not the height:' o (C'tait as my first amp (bought in the only store of rural town I lived o) I did not compare with other amps before buying. Any fawn, I get it even when taken just silent because he stamped Marshall.Since I had the opportunity to try other amps, but this little combo (in size but not the weight.) suitable for private use.Finally, if you get a chance, plug a Bontempi organ above the saturation through the bottom. It's cheap and there's a sound. Con is a teenager, but dares all o). An amplifier transistor. I use it to play the harp on it but it's a guitarist friend gave it to me (after being rejected several times by other guitarists). Despite its size and weight (it has almost the same size as the valverstate 2000.) and the name of Marshall, I recommend for those looking for power (and his side, ca is not worth the quality of an amp Tube ).

Nice guy looking for his old blues.The settings are fairly simpasSide connections, just two inputs (low / high), no headphoneHere are the instructions on the manual:Master Volume 30 watt transistorSensibility: All controls than 0.35mV RMS1.7V RMS maximum input levelSwing Tone: Bass 100Hz - 15dBMiddle 500Hz. 25dBTrebble 16dB (mid max)42 dB (mid max)Power output: 30 Watts RMS into 4 ohm loadIC and transistors builtLoudspeaker, Specially Designed 12 inch 70 watt RMS 4 ohmPower requirment: Mains input - Internally set 220/240v. 40/60HzInternal fuse 110/120V hands. TIA 220/240v. T500mAMax input power 65vAHP Output, Approximately 100mW Into 4/8ohmAppromimately DI Output 600mV RMS output level at 30WattsUTILIZATIONMy brother (guitarist) no one has tested only once: for him, he is nice but lack of energy and it is reminiscent of the old blues - rock a little to Johnny Rivers.For the harp, with one good mic or shure (although I advise against it) of the Bluesmaster hohner, we get a cool sound, the old blues sound.

Marshall Lead 12 Clean

Only regret is missing the reverb.I found the manual on the net (on the website of marshall I think) and even the diagram technique for components etc. The manual is limited to the strict minimum, some specifications.SOUNDSFor the harp, I find it pretty cool, it looks pretty cool with its old potassium.The usual setting of marshall (simple: all the potassium in depth!) Is prohibited.In short, this is the amp that could give the lie to the reputation of Marshall (I'd like to see play on metalheads, they would be surprised!)OVERALL OPINIONIt'll be a year since I have it.What I like most is his former side, simple (the amplification system is very simplistic) and robust (I have no pota sizzling despite age). Evanescence special 2004 rar software ware. In addition, it is rare to find other people who have it. The look suits me very well.What I like least is its weight and size (even if it was a 100W lamp, I will understand), the transport is a hassle. Its lack of power, crunch (and not easy to get the clean sound, ideal)I tested the 2000 valverstate my brother (for the harp, I would not recommend), the Peyvey Classic (I know if the 70w or 100w) tube (TERRIBLE!) And a Custom 30W transistor (very good sound for the guitar).I remain convinced that this is not the amp that will make me play better. Even though my teacher did not try, I think any good harmonica player is able to make it sound.