Hi all and happy holidays.
I have a unit atom and just got Buchardt s400 speakers that have a 88db at 4ohm rating. The atom seems to drive them fine but being new to this what would I hear if that atom was not happy with the 4ohm resistance of the speakers?
Can the Atom drive 4 ohm speakers? Sure thing, there are forum members who use an Atom with such speakers and I use one with 6 ohm speakers. Is the Atom a good match for the Buchardt S400? That’s a different question. If the impedance drops significantly in use, that may cause problems but your experience suggests that’s not the case. The manufacturers suggest 50w into 8 ohms as the minimum, so you’re certainly on the margin specs-wise and at least one review reckoned that a decent amount of power is needed to really wake them and, in particular, to get decent bass. If you find the sound hardens when you play at a volume needed for good bass response, that may indicate they really need more power. Could you borrow a more powerful amp to compare?
Hi Roger, is there a 4ohm rating on the Atom? I didn’t see one but I know people do measurements.
Your response was perfect. That is what I was asking so thank you for that.
I’ve never seen a specific rating for 4 ohms, or 6 ohms come to that but generally speaking you’d expect about a 50% increase in nominal power output into 4 ohms, perhaps a little more.
It’s worth noting that a lot of Naim’s own speakers, when Naim made speakers, were 4 ohms. Interestingly, with Naim’s classic power amps the number of the amp is apparently total the power output for both channels into a 4 ohm load. So the NAP 250 is 250 watts into 2 channels (125 watts per channel) into 4 ohms.
Nap 250 is 80W or 70W, not 250. But it has a lot of current. So the wattage is not all.
That’s per channel, at 8ohms. @PeakMan has it right as it is the combined measurement at 4ohms that resulted in the naming convention of the NAPs.
in August 2012 or so I visited the Naim factory. Steven Hopkins, from the height of his seven feet, or so it seemed to me then, was a perfect host.
When I crossed what looked like the speakers assembly department I noticed a pair of DBLs close to the wall, in full operation; they sounded fine even from a distance. They were driven by a Nait 2.
Enjoy a Happy Season,
I just checked, it’s 80w per channel in 8 ohms.
So 160 W per channel in 4 ohm , right?
I don’t understand 2 things: why summing the wattage for both channels?
Why some consider 4 ohms as a more difficult load for a speaker sometimes?
I suppose because every Naim model name is quirky in some way. Even Naim is a quirky name.
4 Ohms as such isn’t difficult if the amp is designed for it, and essentially all are because 4 Ohms speakers are very common
However, the speaker impedance is not a flat line and it changes with frequency and other factors. Hence, some 4 Ohms speakers may dip down to 2 Ohms in some situations, and this can become difficult. An 8 Ohm speaker is less likely to go very low.
No, Naim amps don’t double the wattage into 4ohms vs. 8.
Measurements from stereo.de magazine
Sure, they tend to be conservative with the measurements.
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