Jazzkids,
The Dunlavy SC-III are quote nice inexpensive and not demanding speakers, nowadays you should get if for under @1K and they will do fine. The SC-IV were very faulty, run form them like from hell. They used very wrong bass drivers (too high Fs) and at the result the SC-IV had very wrong bass. In the SC-IVA model Dunlavy fixed it using more appropriate bass drivers.
The Dunlavy SC-III are quote nice inexpensive and not demanding speakers, nowadays you should get if for under @1K and they will do fine. The SC-IV were very faulty, run form them like from hell. They used very wrong bass drivers (too high Fs) and at the result the SC-IV had very wrong bass. In the SC-IVA model Dunlavy fixed it using more appropriate bass drivers.