I've had one ever since they came out in the early eighties. Think I got mine '81 or '82.
The TS120B is a 1x15 bass combo but in 1981 Traynor initially released the TS120BH (head only) and the TS410 4x10 extension cabinet.
Mine is the TS120B combo. The TS410 cab originally was rated 140Watts @ 4 ohms and had either Eminence or RCF speakers.
The OEM speakers in mine are RCF 15". I don't know when the TS Series was discontinued.
The amp output is rated at 80W @ 8 ohms / 120 Watts @ 4 ohms (1% THD). But it sounds like it has much more power than the rated power.
This is due to a great extent to the TS120B's unique preamp design. The front-end of the preamp uses a JFET design and sounds very
tube-like when you crank up the volume control. The signal then feeds into a 3-band comp circuit. Think Traynor calls it a Tri-Comp Network
design and it works great. The design smooths out nasty sounding distortion caused by the square-edged clipping waveforms typically
produced by solid state transistor designs.
I still use mine at small clubs and such and usually set the volume control about 3/4 of the way open (3:00 o'clock) and the master volume is set
where ever it needs to be for me to hear myself with the drums. You get nice rich harmonics as you crank it up and I have yet to hear any
buzzy fuzztone kind of sound when cranked up.
The TS120B is voiced with emphasis from the mid-bass and up (bright) so if you like lots of bottom end don't feel guilty if you end up pushing
the Bass tone control and 50Hz-100Hz graphic EQ sliders up a bit. Or you can achieve similar results by turning down the Treble and HF EQ
controls and then bringing up the overall volume to compensate. I've never heard the TS410 cab so I don't know what to expect from it.
The Tone/Graphic EQ controls are very effective so you won't have to go crazy with them.
I did have to send the amp back to the factory a year or two ago to get repaired and the internals refurbished. Mike Holman at Yorkville worked
on the amp himself. The design requires matched components so off-the-shelf replacement components are not reliable. That ain't bad for an amp
working reliably for over 30 years.