For those of you who picked up a V18 and found them to be too bassy and the reverb too sproingy, here's a low cost fix for both issues. DISCLAIMER: ONLY QUALIFIED PEOPLE SHOULD MODIFY A GUITAR AMP. HAVE AN AMP TECHNICIAN MAKE ANY MODIFICATIONS. HIGH VOLTAGES INSIDE A TUBE AMPLIFIER CAN HURT OR KILL YOU. The fix requires two components... 1.) a 0.68 uF (microFarad) / 50 volt capacitor 2.) a 680 ohm / .25 watt resistor The fix involves easy access to the amp's internals. First unplug the amplifier! Then remove the eight screws that hold on the back cover of the amp. No other disassembly is necessary. Check for residual high voltages! To fix the overwhelming bass problem, replace capacitor C13 with a 0.68 uF capacitor. C13 is a 2.2 uF / 50 Volt electrolytic polarized cap. It is a small blue vertical tubular component that stands up off the circuit board on two legs and has some hot melt glue helping to hold it in place. Carefully remove the glue away from the capacitor to expose the leads (legs). Note which leg is negative by the markings on the capacitor and the silkscreen on the circuit board. Clip off the tubular part of the capacitor, leaving the two legs sticking up out of the circuit board. Solder the 0.68 uF capacitor to the leftover legs, observing the correct polarity. Keep the new leg length short. To fix the sproingy reverb, add a 680 ohm resistor in parallel with R36. Solder one leg of the 680 ohm resistor to one leg of the 4.7 Kohm R36 resistor, and then solder the other leg of each resistor together. That is two solder joints total. Replace the rear cover. Plug in the V18. Rock out. If you are a qualified amp tech, the mod will take you 15 minutes and $1 in parts. If you are not an amp tech, take it to someone who is, and pay them $25 to make the mods.