Good Balance siding on warm, Recommended value for distortion box.ģ.3nF (.0033uF) - Moderate Volume Reduction Muted Highs, distortion pedal only, not good in amp mode.Ĥ.7nF (.0047uF) - Moderate Volume Reduction I should really reduce the value a bit further (.0033uF?) to brighten it up a bit or add a switch to select several values, but I am happy with the sound and need to use it a bit more before I make my next adjustment. When 'Volume 1' is high it will effect the tone of 'Volume 2' Note: You need to reduce 'Volume 1' to its minimum in order to fully remove the cap from the circuit. As a standalone amp, the sound is a bit dull using Volume 1, but you can use Volume 2 to get the original tone. This results in a much warmer tone and is probably the largest value I would recommend for this type of modification. 9 O'Clock on Volume 2 is about the same level as 3 O'Clock on the modified 'Volume 1'. The volume is quite a bit quieter than the original 'Volume 2' sound, but usable. 01uF capacitor, I really liked the results as a distortion box. 047uF cap, Much louder but still too quiet as full volume. I guess the Fc is very low using a 1uF probably lower than 100Hz. This value made 'Volume 1' very quiet, at full volume it was quieter than the direct clean signal, but it sounded much better and I could now adjust the tone. First I grabbed a 1uF 0603 that was handily right in front of me at the time. Fueled by lazyness and undeterred by my ignorance, I decided to just try a couple of values. The only issue is that I would need to know how much resistance is downstream to predict the cutoff frequency Fc. The potentiometer for 'Volume 1' is a convenient place to add a capacitor as one leg is signal and another is ground. I needed to add a cap from a signal point to ground. My modification is to add a single 0603 capacitor between the pins for the potentiometer. ** see note below ** The 'Volume 1' potentiometer is connected to the middle right of the PCB right under the 'TERROR STAMP' label on the silk screen. The circuit for 1st order LP is a single resistor in series and a capacitor to ground.įrom the top there are 2 volumes that are switched via a foot switch, so I thought it would be useful to only modify the tone of one channel, and retain the original sound on the other channel. This will reduce the high frequency at a rate of 6dB (half volume) per octave beyond a specific frequency Fc. I knew that I wanted to remove the high frequencies, the easiest method is a first order lowpass filter. I did not want to fully disassemble my new pedal, so I wanted to modify it from what I could see. The top PCB is used for IO, while the bottom is used for the main circuit. There is one tube (JJ ECC83 / 12AX7), an internal "tube gain" adjustment, a power amp chip attached to a large aluminium heat sink, and two main PCBs. My only complaint is that the foot switch wires (brown) are very close to the tube, also using the chassis as a heat sink for the power amp would have been nice but there is a lot of ventilation. The pedal would probably sound fine going into any amp's effect return, bypassing its preamp, but I really wanted to use it like a distortion box so about two hours after receiving it and 4 screws later, I opened it up and look for a convenient mod point. It sounds really good at this setting for both high gain and crunch, but I felt locked into only one usable sound. (I like the sound of E元4s)Īs a distortion box, using only Input and Send/Line Out, it has an even harsher high end that can be tuned out by a very specific tone setting. I also want to use the power amp section for when I do not want to lug around my Orange Rocker 30 Combo. I am more interested in using it as a distortion pedal so I can switch up my sound using various pedals. It has a bit too much high frequencies for my taste, but I was able to find a good tone with the shape knob at around 8-11 o'clock. I received unit 00985 probably manufactured in December 2019.įirst as a standalone amp played though a 12" speaker cab the amp sounds pretty good. The controls are simple, you get a gain to control distortion, two post distortion volume controls that are switched via the footswitch and a tone control that increases treble and also sweeps the mids at the same time. They did not skimp on features either, it contains a tube preamp, effects loop, a 20 watt class AB power amp, and a cab sim / headphone output. Orange Amplification managed to pack a micro terror into a medium pedal sized enclosure. My first impression was amazement on how small it was. The Orange Terror Stamp was announced and winter NAMM in January of 2020.Įxcited, I pre-ordered one and received it today.
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