B1 Bass Module
A thing of the past, but still sounds GREAT if you can find one second-hand. Still perfectly suitable for the original Bose L1 systems.
B2 Bass Module
No longer produced. The B2 sub from Bose came about when bands and DJs wanted a bit more bass than a pair of the original B1 subs could manage.
Obsolete but still a very viable subwoofer if you have an older L1 Model II, or L1 1s. The B2 subwoofer still comes up for sale second-hand on TradeMe.
T1 ToneMatch® audio engine
The original T1 Tonematch mixer had it’s place and while it’s no longer made, it’s still a great basic MONO mixer for the Bose system.
Not as easy to spot potential faults in these compared to the B1 or B2 subwoofers.
If you’re after one, consider going with a newer T4s Tonematch instead.
PackLite Power Amplifier Model A1
The Packlite A1 amplifier was originally made to pair with the B1 or B2 subwoofers when you needed more punch from your L1 system.
No longer produced although there are still plenty around, some retailers still list new stock available.
Since the introduction of the L1 Pro range with the active Sub1 and Sub2 options, there’s really no need for the older Packlite and B1/B2 subs.