Saturday, 3 February 2018

Laney Supergroup 100 MkI Preamp

Laney Supergroup 100 MkI

What can I say about the Laney Supergroup. The supergroup was based on the same Fender Bassman architecture just like the Marshall JCM800, Sunn Model T, Mesa Dual Rectifier, and a whole host of other legendary Rock, Hard Rock, and Metal amplifiers. One of the best descriptions I've ever heard of the Supergroup is that it's like a Marshall JCM800 with more balls and gain. It's just an all around badass heavy amp. And for all my lovers of tall things heavy it was used by the legendary Tony Iommi for years, and Laney even went through the trouble of recreating it to reissue it as a special signature amp for Iommi.





Both Channels with a selector switch


Separate Inputs


Both Channels running together (jumping channels)


Treble Channel


Bass Channel

24 comments:

  1. Lovin' these pre-amp posts! <3 u Zach.

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    1. Haha. Thanks man. This one was stupid easy cause it's the same as ones that we already have, so it was a simple modification of values. Really it should be verified, but I want to make sure that someone builds it and it sounds right. I do have a schematic for a preamp conversation for this with the inverter, but it's gonna take some time to complete.

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  2. I currently use a 1968 shed-built Laney LA100BL and I've owned Supergroups and Klipps. These amps are in my opinion the very best of the era. Absolutely crush Marshals and Hiwatts of the same era. Thanks for making the layout!

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    1. I'm looking to build up a Laney LA100BL clone. What voltage are you running the plates??

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  3. What type of DPDT on/on/on, type 1 or 2?

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  4. you could leave out vero 3 and make the DPDT in vero 1 a DP3T ON-ON-ON like this:

    123
    456

    1 NC
    2 INPUT
    3 Treble
    4 BASS
    5 Connect to 2
    6 NC

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  5. PS Isn't layout 1 an overkill? The only difference between both channels is the 220p cap... Why not make that switchable with a spdt and save a lot of space?

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    Replies
    1. Not really. The idea of the 1st layout, just like on the model t preamp, is that you can select either channels or run them both at the same time. Putting a 220pF cap on a switch to select between either having the bass channel or the treble channel does not accomplish the same goal.

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  6. Any chance of a schematic for this?

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  7. I found

    http://drtube.com/schematics/laney/Super_Group_100_Mk1_preamp.pdf

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  8. Replies
    1. the usual half the supply voltage, so if you're running 9V then bias the FETs to 4.5-5V.

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  9. Using the trim pots I can those voltages on q1-q3 but q4 drain i get 9volts

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    1. that's supposed to happen. there's no trimmer for Q4, as it gets full voltage. you'll only be able to adjust Q1-Q3.

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  10. What project! I really can't test it in the next months. :-(
    Waiting for verifying.
    Thanks guys!

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  11. Anyone hav any actual clips of the emulator pedal and not the Laney amp itself?!?? I'd hate to waste my time on something that in the end....sucks!

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    1. well since it's not verified the answer is no. since it's similar in nature to the model t preamp, which sounds like the actual, i would say it's safe to assume this will sound like the amp as well.

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  12. Built the first layout, with the channel switch, fired right up. Sounds amazing, pretty similar to the first video up there (at least to my ears)

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  13. Thanks Kevin!
    I would to know how it works, exactly, the version you built, the first layout.
    Just one input and three "channels" (on/on/on switch so... three way). It has a shared EQ but two separate gain pots. With the switch setted on the center position you can drive both the gain pots? What is the kind of sound? More gain?

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    1. Yup, one input, the dpdt on/on/on switches channels, on the middle position would be the bridged channel. I find myself running it in the bridged position the most. It's pretty high gain, like the description says, it's like a jcm800 with more balls and gain. My only problem with it is the treble EQ control, gets very ice picky of you turn it up, but it was like that for my model t build from here. Definitely worth a build IMO

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    2. Edit: just plugged it in again, and I wouldn't say ice picky about the treble. It got that was with my red rooster so to be clear the treble control is fine! My mistake :)

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    3. cheers man for the verification. i was going to say theres no way this should be ice picky, i mean iommi used this amp and used a treble booster to brighten it a bit. lol

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