Required output current at min load can be calculated.
My Benchmark AHB2 delivers continuous 100W at 8ohm requiring 3.5A current. Let's assume even 5A to give it 100% overhead (200W). Current will be 4x higher driving 2ohm load (8/2=4) to keep the same output voltage (perfect voltage source), resulting in 4x5A=20A. AHB2 is specified at 29A maximum current (both channels driven) so it is OK with 2ohm loads. “Both channels driven” is very important part of this specification showing that power supply is able to deliver total specified current (2x29A=58A).
Shocked. Need Opinions. How muck power do I need?
I’m moving so of my sound gear around. As a temporary measure, I set up my little Cambridge EVO 75 in my main system. Driving my Dali Mentor 6s in a large room (36x36). Speakers are 9 feet apart and seat is 10 feet from speakers. This 75 water replaced my much more powerful monoblocks. To my shock, the amp drove these speakers just fine. The bass was a little weaker, but perfectly acceptable. Here’s what I want to know— if 75 watts are enough, will 40 watts do? I’m talking all solid state. What say you?
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@swede58 well that those 16 watts, is just enough.... :-) |
@ssg308 Yes If you have fairly efficient speakers. I heard the Pass int250 on a pair of Diptyque panels (87db, 6 ohms) and the meter was bouncing all over the place at normal listening levels. |
@swede58 yes, JBL 4367 does the trick at 94db 8ohm and they are set at neutral setting for crossover loads |
In general, the Dali 6 have an impedance of 6 Ohms - that means a high current amp may sound a bit bass heavy - which the Dali's are prone to, The efficiency of the Dali's is 89 ish if I recall correctly - I think Tube amps would sound best or a Class A amp like Pass or Plinius as second best. Why? The Dali's tend to sound lean and could use the harmonic richness of a good tube amplifier. A thirty watt tube amp or fifty watt solid state would sound nice. |
- 47 posts total