Would this work?
I'm revisiting the issue (still have the Cerwins - AT100s and xls215s !)
Would an active subwoofer (?Q Acoustics or SVS) and sensitive mid/high range speaker (if they exist) be a good compromise?
i don´t know how it sounds in your room where you have the AT-100´s but never had need for more bass, even with direct sound with a ES amplifier bought in early 90´s ,this with a 74 Pioneer turntable PL-ES with a cartridge that came with it, the PC-30,
but in the early 90´s only could find a PN-50 stylus that cost me what today is 10€, still today in very good shape as i had other turntables working.
This cartridge was from a series that had a beautiful designed cartridge and there was three diferent cartridges, seen as the red, grey and orange i had the red with the grey stylus( the color was the casing of each of the 3 stylus),
even albums live that wouldn´t hear them much but with this new amplifier , even at the time, expensive Sony turntables weren´t as good as the sound of my 74 pioneer turntable, deeper sound ,less high´s than with the red casing stylus to my PC-30 cartridge,
i have only 3 diferent types of amplifiers from Sony and this new at the time TA-F790ES or 690 not sure now, sounded really amazing and before buying a new cassette deck i was using a GX-9 from Akai that recorded and played with a very high quality sound,
had bought a Pioneer PD-7700 cd player as before had a better built PD-7300, which was a high-end cd player and before buying it,
i tried a meridian, two components cd player ,when side by side would be the size of a standart cd player that had a new design and all system complete looked very nice ,and a lot more cd players refered as very good at the time,
and noticed that the Pioneer cd player wasn´t that far from several other cd players told to be very good, so i kept it, only later bought a Rega cd player(at the time everyone i knew were saying that sounded very good) and a ofered CEC or chuodenki belt-driven "the more analog cd player i ever saw..."i had read in a very known magazine that starts by "What" and ends in "Fi" ,
to say that as better amplifiers i was buying and speakers the worst cd sounded and the better cassettes ,reels , dat cassetes and records sounded, and bass was there very well defined and all sounds in the record "Nocturne " by Siouxie and the Banshes,
a live doble album available in VHS first, later DVD with Robert Smith from the Cure as guitar player in the previous album and the tour that gave origin to the live album, the first time i heard a not tube amplifier with great sound in direct,
the bass was heard perfect, and could increase treble and bass if needed depending on the production of each album.
To end , heard a lot of speakers before buying the Cerwin-Vega´s that had not that good critic , like "good only to rock music", but after hearing some were without a doubt the best sounding speakers with powerfull sound and a 4ohms speakers with sensitivity above 100 db´s , old jazz records sounded amazing good there, while researching ended up buying also some late 80´s Tannoy "Sixies" model, 605 with original stands due to the speaker shape, also some KEF Concerto, between 87 and 93, my first black system or payed by my own money
one thing, i noticed that cds as it were built diferent in the 80´s with better materials and was hard to get it ,skipping or jumping, as in the 90´s was easy to happen with a already lot of use cd player , but cds sounded good to me only expensive ,could buy to records with one cd money so ended up buying more records, only had 7 cds till 1990 but my father had bought maybe a 100 cds,
only the sound of cds sounding good was only because i was using still 70´s components has i had a Pioneer SX-1050 and some 80´s Mission argonaut or model 780, with 70´s equipment cds didn´t sounded that bad, even with a cheap Sony cd player, that still works today ,also diferent from all other cd player from Sony, black with a blue display,
i say this as i have friends who bought Sony cd players ESprit series , very expensive, and some would be under the bed after only one year and others lasted more with repairs, but what matters here was me not understanding why one needs a sub-woofer with the AT-100s that have all the bass one wants