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Title: Dunlop Octavio Bass mod?
Post by: Agreco1489 on March 20, 2025, 04:43:27 PM

Hi! New to pedal modding...

Would anyone know how to increase the low end on the Dunlop Octavio?

Would increasing the size of C1 help?

Thanks!

Title: Re: Dunlop Octavio Bass mod?
Post by: antonis on March 20, 2025, 05:25:06 PM

Hi & Welcome..

It's allways helpful to post a schematic diagrama of the circuit.. :icon_wink:

(https://i.imgur.com/0I6XLua.jpeg)

If by C1 you refer on 100nF input cap, its value is already set corner frequency at about 4Hz (rough estimation)..
You might have to check cap values of other LPFs..

Title: Re: Dunlop Octavio Bass mod?
Post by: PRR on March 20, 2025, 08:49:58 PM

Quote from: antonis on March 20, 2025, 05:25:06 PMinput cap, its value is already set corner frequency at about 4Hz

That transformer is claimed for 300Hz. That connection cancels the fundamental and generates a 2nd harmonic. There may honestly be very little below 600Hz, and little hope for deeper without redesign and re-investment (bigger iron).

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DIY Stompboxes => Building your own stompbox => Topic started by: Agreco1489 on March 20, 2025, 04:43:27 PM