Boss Cs-3 Compression Sustainer

Hey everybody. I was wondering if any of you use this pedal and what you think. I picked one up a couple weeks ago along with my Boss BD-2 Blues Driver (which I love), but I'm not entirely impressed with the CS-3. I enjoy the sound, and the sustain is great, but it seems I'm losing a lot of tone (specifically the bass, it just disappears, no matter what the settings). It honestly isn't even the biggest deal, however it is when you're turning off the pedal in the middle of a song. Any suggestions or anybody with the same problem?

PS- I could be overlooking something obvious, that tends to happen. Any opinions are appreciated.

Fender Amp - Unsure of Details

Ok, stick with me on this one.. I have a Fender "The Twin" Red Knob combo amp with 2x12" speakers. My father had received it from an nice older woman quite some years ago after working on her house. Her son had purchased it new, shortly before enlisting in the armed forces. My father gigged with it a little, but mostly just played at home. He gave it to me when I was 16; I'll be 22 in a few weeks. I've played it on a regular basis, but never gigged. It shows some wear and tear, but no signs of defective parts. I am not very knowledgeable yet in this field, so can anybody possibly help me determine the year of production and further specs? I know the tubes have never been changed, and it made in the mid-80's. The serial number is #L07XXXX (I'll fill in the X's from home later). Thanks! Any info at all (or direction pointing) is much appreciated!