These are not what is commonly for room shaking. It has a finely tuned crossover, giving bouncy lows and floating higher lows. Only suitable for Audiophiles requiring emphasis what might be missing from floor-standings.
JBL HT1S - A pair of passive subwoofers, used little and stored with care.
Made in California plant in the USA.
Powerful but finely tuned crossover, on a 12 inch driver.
You could just use them as stand-alone subs adding them to front channel B, on your home theatre if such an option is available.
Audition welcome at Bashundhara RA, phone , for any queries except price negotiations.