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thisheavyearth

HESHER v3

HESHER v3

5.0
Rated 5.0 out of 5 stars
1 Review
$189.00 USD
$189.00 USD
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Shipping calculated at checkout.

 

What started years ago as a collaboration with another builder eventually resulted in me continuously refining the JCM800 preamp circuit. After designing version 2, I grew tired and started to ask myself what I wanted in a Marshall-style preamp. The first thing was starting to mod my own JCM800 but the added gain still wasn't where I wanted it to go. Soon later I worked with some 8100 builds but that wasn't it either. Following those experiments I set out to just work from scratch and this is the product of those experiments. With nods back to multiple 80s circuits while paving its own path, this is my answer to a high gain British preamp. This MIAB doesn't use any JFETs and instead uses a unique opamp gain staging topology unique to this design but you'll find the slightly modified tone stack to react similar to that of a 2204. 

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REVISIONS

Date Version Description
2024-08-09 3.0 Initial production version

CONTROLS

Name Location Description
Level External Plenty of output to boost your signal or just dial in unity gain.
Gain External Adjusts the amount of preamp amplification. Cleaner sounder at lower gain settings, high gain settings will produce more sustain and distortion.
Treble External This control determines the amount of treble and makes your guitars tone brighter as it's turned up.
The tone network is highly interactive and, because of this, altering the setting of one control can change the way the other controls behave.
Mid External Crank this CW for a fuller more cutting mid tone. Turn it down (CCW) for a more aggressive scooped sound of classic thrash
Shifting away from the classic JCM mid control, I went with an anti-log pot to help with dialing in those more mid focused tones.
Bass External Controls the amount of low-end frequencies in your tone.
Presence External Adjusts the amount of boost or cut in the upper high frequency range.
Bypass LED Brightness Internal Adjust overall brightness of front LED.
Default setting at minimum (full CCW).
POWER

9VDC ONLY - CENTER NEGATIVE

This product contains internal circuitry to increase the 9VDC supply to higher voltages for additional headroom.
This product contains THE overvoltage circuit for 9v input only.

CONSUMPTION

77mA

SWITCHING

TRUE BYPASS

Soft click (1.1KGf) mechanical 3PDT.

DEMOS

  • Free Shipping

    Free USPS Priorty Mail shipping in the continental USA.

    International shipping rates calculated at check out.

    Please note international shipping times can be days to weeks. Unfortunately, this is out of my control.

  • Built To Order

    Unless otherwise noted, all builds are built to order. I build on my nights and weekends so build-time can vary but is typically 7-9 days from order. Excluding preorders. For preorders, see preorder details on product page for estimated shipping.
5.0
Rated 5.0 out of 5 stars
Based on 1 review
Total 5 star reviews: 1 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
100%would recommend this product
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1 review
  • G
    Gabe
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    1 month ago
    Amazing Preamp

    This pedal nails that sound. I run it into the Higher Power power amp just like the videos and boost it and its thrashy as hell. I always wanted to try to put together a full pedalboard rig and this did it for me.

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