Ciao @adversam, as mapman said they're a fairly easy load on the amplifier; also they're nominally 6 ohm, my 37 year old model is less efficient then the current models but they do like high current amps.
I'm using a Nakamichi PA-7A amp (225 watts into 8 ohms), the European version is a PA-7E. And the matching pre-amp (which I also have) is the CA-7A.
The bass: Ohm uses what it calls a 'Sub Bass Activator' which kicks in a 60 Hz. My understanding is that it diverts frequencies 60 Hz and lower to the cabinet vent whose outlet is on the bottom of the cabinet.
If the speakers are on carpet (like mine) this has a tendency to attenuate the bass somewhat, however if placed on hardwood or any solid material floors it reinforces the bass. If you are in an apartment you're going to have a lot of pissed off neighbors.
For music listening I doubt you will need or even consider a separate sub.
In the average room they will go down to the mid 30 Hz... cleanly, and best of all will not affect the tonality of the lower mid-bass as most box speakers do resulting in clear and accurate male and female voices.
I recently listened to $30,000 Focal speakers with a CD I brought and know well, they were very nice but not as accurate as my 37 year old Walsh 4's.
I'm using a Nakamichi PA-7A amp (225 watts into 8 ohms), the European version is a PA-7E. And the matching pre-amp (which I also have) is the CA-7A.
The bass: Ohm uses what it calls a 'Sub Bass Activator' which kicks in a 60 Hz. My understanding is that it diverts frequencies 60 Hz and lower to the cabinet vent whose outlet is on the bottom of the cabinet.
If the speakers are on carpet (like mine) this has a tendency to attenuate the bass somewhat, however if placed on hardwood or any solid material floors it reinforces the bass. If you are in an apartment you're going to have a lot of pissed off neighbors.
For music listening I doubt you will need or even consider a separate sub.
In the average room they will go down to the mid 30 Hz... cleanly, and best of all will not affect the tonality of the lower mid-bass as most box speakers do resulting in clear and accurate male and female voices.
I recently listened to $30,000 Focal speakers with a CD I brought and know well, they were very nice but not as accurate as my 37 year old Walsh 4's.