Yamaha FB-01 Mods Before/After by MrMojoRisin published on 2016-03-31T07:50:59Z Before/After Yamaha FB-01 Comparison with 18nF Caps Before / 3.3nF Caps After + JRC4556D Op‑Amps Before / OPA2134PA Op‑Amps After + 4.7k Resistors Before / 10k Resistors After. Full DIY details with part numbers and schematics are at http://llamamusic.com/fb01/ This is a very inexpensive mod to boost the performance of this classic synth module. My total cost for all parts was under $7 USD This mod goes one step further to improve the sound quality of the FB-01. In addition to replacing four capacitors to improve treble headroom, two audio filter IC's have been replaced with higher quality op-amps. Also, the total volume gain has been increased from 3 to 5 by replacing two resistors. For the Before/After audio comparison no external processing was performed and the volume levels were not altered. The volume increase is a result of the new 10k resistors. Factory ROM Patches Used (in order): 3/23 Koto 3/20 Glocken 3/43 SnareDr 3/46 Mars to Genre Electronic Comment by Gerard Jugno 106 Mhh .. I prefer the "Before" version , sounds darker and smoother 2018-12-31T09:21:59Z Comment by Nicolas Chenard you convinced me, i'm doing the mods, thank you 1000X for the demo ! 2018-01-16T20:52:54Z Comment by malte bergman // m-ski the tonal improvement is very good. but it would have been good to have the sounds at the same level. loud allways sounds better ;) 2018-01-03T11:03:03Z Comment by David Pericone I was about to list my FB-01 on Ebay last night when I, by chance, found your mod. I did it this morning, and WOW! I'm keeping it now. 2017-09-12T16:44:14Z Comment by Kelloop's Thanks from France! 2016-11-23T18:25:02Z Comment by Amateur Tools DSP thanks for this, i'm going to do these mods! 2016-08-16T06:02:35Z
