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I discovered something very interesting in my experiments with the Growler + 2 CH Mixer: layering.
On the Growler, the DRY out is connected to the input, no processing. The WET out is the processed signal of clean+harmonic. There is a small delay introduced to the signal, it seems, such that when I have both the WET and DRY active through the mixer -- harmonics off -- I get a noticeably thicker sound to my bass. What an interesting find!
My setup has not gotten very complex if I want it to be, in the space of just two pedals, with numerous combinations of the Growler's two channels and the mixer. I can go from pristine clean that is just my MXR EQ, through various levels of layering to all-out growl.
I just stumbled upon this thread.
I don't own a FEA product (yet!) but I have exchanged several emails with Glen Appleton requesting info about their compressors and he has always replied back quickly with all the information I needed to be a future client.
Now I'm just waiting for the Opti-FET or the new Dual Engine Compressor to be available.![]()
Hey Fran, welcome to this club!
I'v owned the Opti-FET for a few months now and it's a fantastic unit. It operates silently and provides smooth sound. Doesn't smash your tone like other compressors. Great powerful controls and it adds a bit warmth to your tone. Very musical, I use it on stage all the time now. You'll love it.
Fran, just like you I went into the waiting list and bought it directly from FEA Labs.
I'm glad I didn't have to choose between the Opti-FET and the new upcoming DE-CL... tough choice.
The side chain EQ on the Opti-FET is very useful for different styles of music. You can really hear the compression effect on different frequencies.
I'll provide a direct A/B comparison when the new one becomes available.

Agreed.But FWIW, the Opti-FET has interior dip switches that engage a similar amount/type of warmth. I'll provide a direct A/B comparison when the new one becomes available.
I am trapped at home due to ice today, I will see about making a clip or two of the revised board.
I really hope people are taking a look at the Photon Fuzz. It is definitely my favorite fuzz right now...I can't praise it enough.
Thanks!, I'll be looking forward to reading your comparison.
Regarding the "warmth" on both units, this is what Glen told me:
"The warmth control on the new compressor is similar to the internal switch on the Opti-FET in function, but the application is slightly different. With the warmth control on the new compressor turned all the way down, it will provide less warmth than the Opti-FET with its switches off (essentially no warmth). With the warmth control on the new compressor turned all the way up, it will provide more warmth than the Opti-FET can achieve."
Hey guys, thanks for the kind words!
Although what Glen has said is technically 100% correct, I think most people will have a hard time hearing the differences between the clean/transparent modes of both compressors. The difference is like a change in temperature of less than 1 degree most people can not sense that small of a change. If anyone can hear a difference then Bongo will. I know that sometimes he hears minute things where you need test equipment to detect it. Hyper sensitive hearing can be both a blessing and a curse.
-Frank
I managed to snag a DBD for a good price. My All-FEA board is coming into shape. Just one power connector left, reserved for a compressor.
Hey Frank,
Thanks a lot for the additional info. That might make it easier for me.![]()
Hey Chad nice board! The plug for the direct out of the Growler needs to be pushed in.:
