how much power

whichever you prefer. I wouldn't let an amps amps decide anything for me.

Someone needs to tell me how an amp can peak 45 amps and NOT drag the powersupply down to a low voltage, regulation or not. Even if you dump a huge capacitor bank, you than must contend with 200 watt transistors above designed limits.

power is watts, = volts x amps

Unless we are going back to the days of IPP (instant peak power) a scheme whereby an amp with a door bell size transformer can be said to have 500 watts.

As for doubling up? This is 'the law' for panel speaker users, like myself. howver, I'd rather have an amp with 400 watts at 4 or 8 ohms than an amp which doubles up from 100watts @8.

I think NAD may be on to something with continuous ratings being the same across impedance, but an ever increasing dynamic power as impedance drops. No mention ever of 'amps'.

Rok2id,

Are you familiar with the unique design of the HK 990?

The unit's preamp section offers the kind of DSP that you would usually find only in a multi-channel AVR or pre-pro. (It has ADC, DAC, digital bass management, digital room EQ, etc.) Personally, I think it's an incredibly good idea, but it's definitely not the usual "audiophile approved" approach. I'd love to endorse it, but unfortunately, it's well nigh impossible to find one to audition and I've never heard one. However, if you listen primarily to digital sources, this thing has unique capabilities among 2 channel amps.

My point is that, the HK 990's power amp section, while a highly regarded design (see below) isn't really what PRIMARILY distinguishes this unit from the Parasound (or anything else, really).

That power amp section itself follows the Matti Otala Citation design principles established decades ago. Many people (me included) like the sound of these amps very much. A lot has been written about this clever design and a quick Google search (try "citation amp" or "Matti Otala amp design") will probably be educational for you. In the end, however, the overall "sound" of the HK990 will be much more influenced by the DSP in the preamp section - if you use it.

Good Luck.

Marty

Martykl-- Magfan:

Thanks very much for all the good info.

It's not the amount of power but the quality of the power that matters.
You can find a lot of low watt amps that will better the sound of what you have.

It's been said, if the first few watts suck, why would you want more?

I find wattage highly over rated.

I went from 1000 watt mono blocks to a 2 watt amp and I never run out of power( 5 ohm, 90 db eff) or feel that it's underpowered.

There is as much sound in the room as before, and the bonus is that the sound improved with the lower watt amp.

I think your speakers are also not too power hungry, so don't limit your search to high power amps.

Lacee,
I used to drive Chevy Suburban, but now getting around with Toyota Camry. Camry in general is OK, however it will less-likely pull 25' Donzi on trailer.