Tonewoodamp + Fishman Rare Earth Blend Knob at 50/50 (Feedback Loop?)

Hello everyone, I am interested in purchasing the Tonewoodamp for my acoustic guitar, which is equipped with a fishman rare earth blend humbucker.

I play a lot of percussive fingerstyle and I am a bit concerned that the internal condenser mic could possibly create a feedback loop since I use the blend knob at 50/50 most of the time to make the percussive sounds audible.

What are your experiences with it? If it is highly likely that I will need to blend out most ot the mic's signal to avoid creating a feedback loop, then unfortunately the Tonewoodamp isn't going to be my choice since I enjoy the sound of the 50/50 blend and I've also spent around 280€ for the pickup+installation.

Another short question:
The fishman rare earth blend pickup works with two 1.5 volt silver oxide batteries (instead of a 9v battery like f.e. most electric guitars with active pickups), which is way I've always had to crank up any amps master volume to hear my guitar signal. Will I have the same issue with the Tonewoodamp? Will it process the effects loud enough?

Thanks a lot and best greetings from Germany.

Hi MJ! A 50/50 blend may be prone to feedback, but if you experiment a bit with placement before you install the X-Brace and utilize TWA's notch filters, you may be able to get away with that hot of a blend. It will require a bit more effort in getting dialed in feedback free with a blend that hot.

Of course, you can dial back the blend, but the percussive tones wouldn't be as audible through TWA.

I do know some of our artists do utilize TWA with mic systems for precisely that reason and are able to use TWA without feedback.

Any of our users using a blend system have more input?


TWA is equipped with a Master Gain setting as well as volume and gain settings on each individual effect. You'll dial in the Master Gain as hot as need be, and then you'll have headroom to experiment with the gain and volume per effect.

Hi, I'm doing some experiments with the tonewood amp also using the condenser microphone (my Eko guitars, dredgnouht + Fishman presys + blend) also working with the notch filter of both guitar and tonewood, sometimes a slight feedback remains . I use 50/50 between mic and piezo, I placed the tonewood not horizontal but at 45 degrees, and I noticed that the membrane is more ugly in the body. I will continue with other tests, hoping to find the best solution.

Hi Mattia! You'll definitely want the rubber cone sitting as flat on the guitar as possible. If the back of your guitar is arched, you may want to mount TWA closer toward the edge of the guitar toward the endpin. This will allow it to sit flat on the guitar.

If you continue to have trouble, shoot me an email with some photos of the back of your guitar to support@tonewoodamp.com

 The cone of the tonewoodamp now is perfectly adherent on the back of the guitar, and now the sound is perfect, to add the percussive part that does not have the piezo, I decided to mount a Double transducer in parallel with the piezo of my Fishman Presys, so as to be able to replace the condenser microphone blend. 

Hi, after finding the right position to make the cone adhere to the back of the guitar, I decided to mount the fishman's piezo in parallel, a pick up double transducer, to make the guitar percussive in the kick area above the hole and in the scratch zone! I'll let you know the result!!


Lovely! Please let us know how it works out! We'd love to see a video as well!


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