I can recommend the SCS4, as well as provide some background. The 'bookshelf' SCS4 was presented as a home theater product and as such contained solutions for that use. Its voicing is for an on-wall environment and therefore is bass-shy when placed on stands in the room. I believe (open to correction) that the T(tower) iteration is not re-voiced for in-room placement. That said, I find the SCS4 bass satisfying as-is, especially in your small room where bass management can be the greatest system challenge.
Early SCS4s were made in Lexington with polypropylene caps and hi-fi components. Later versions were made in China with less-than-best (in my first-hand experience) crossover components. The Thiel-designed driver was always made by FST in China and is first-quality. All the 'T's were made in Lexington to Thiel's high standards. But, as mentioned, the 'cabinet' is merely a stand and does not support lower or louder bass. (Unless the XO was re-tuned for in-the-room placement.
The SCS4 tweeter was the development workhorse for Jim's swansong CS3.7 tweeter. It employs his lifetime of knowledge and experience. It is magnificent. The lower / high-pass tweeter crossover is unique to the SCS model in that its entry slope is progressive. The first octave below the 2.5kHz cross-point is 6dB/octave, progressing to 12dB/octave to limit excursion to cope with soundtracks and so forth. Also, the traditional aluminum dome is mated with an aluminum voice coil former for heat dissipation, along with ferro-fluid. The problem of turbulent eddy-currents in conductive formers is managed by a longitudinal VC slit. Nice solution.
On a more general note, I am using the SCS4 as my development workhorse for future upgrades to apply to all extant Thiel products. Renaissance advancements include internal cabling, crossover layouts and components, and fluid-dynamic wave-launch enhancement. The SCS4 will be the first Thiel Renaissance product and the rollout will be retrofitting extant speakers. So, owning this model would put you in a position of early adopter for next generation authentic Thiel products.
The stock SCS4 / or SCS4T is a solid product. It is uniquely 'Thiel' in that it presents a time and phase coherent wavefront, albeit with somewhat more phase drift admitted than the hi-fi models. Its frequency and time domain performance is first-rate, and its aluminum baffled, beefy cabinet with rolled front edge does a good job. The single coaxial driver obviates the need for direct-centered and seated listening. You get coherence wherever your ears are. The 'problem' with the 'T' was its doubled price over the bookshelf version without performance advances. On the used market, that 'problem' nearly vanishes.
Let us know what you do.
