It is, yes. But you have to be a little careful when you simply crank the bias. You can cause more distortion in the crossover region because the total output device transconductance rises there. Generally there is a "right" bias for AB.
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300w Pure class A Monoblock search!
What is it you are looking for?
The audiotorium is a mess, as usual...
TV: someone getting into big trouble flying into cloud near a mountain ridge without proper instruments in New Zealand.
Holy Shit!
Stuff accumulates over time, what can I say?
Awesome.
Simple answer is no, sorry. Sometimes manufacturers will include it as a selling point, e.g. "class A until xx W". If you are comparing amplifiers rated the same wattage the one with higher idle power may be biased more heavily into class A, but the extra power could also be going into the earlier stages, display and control circuits, and so forth. Or one could really be a 150 W amp spec'd as a 100 W amp to provide better datasheet numbers at 100 W (thus having higher power supply rails leading to higher idle power). Without an explicit statement or a good schematic (that indicates bias currents) it is almost impossible for a consumer to tell "from the outside".
The air conditioners around here (Tampa, FL) pull much more. Mine has a 5kW sticker on it somewhere.
Several years ago I complained to the Utility about "low voltage".
A power strip had a low voltage alarm that would trip in the afternoons.
They came out and put a meter on my meter outside for a few weeks.
Then replaced the local transformer that feeds several houses around me with a larger unit.
I don't think anyone addressed this. The Klipsch RF-7 claims 100dB/1W @ 1m. That is high efficiency. 1W input will be quite loud in a domestic environment. With 300W input they will be face-melting loud. RIght in front of the PA at a Megadeath concert loud. On the runway while an F35 takes off loud. Is this what you're going for Lew3vans? If not, a much more modest amp will suffice.
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The 100 dB is nonsense. Reality is at least 6 db lower. That’s still somewhere between 92 to 94 dB (depending on where you measure), but will need 4x the power vs a real 100 dB speaker. The again, even 100W should be plenty.
Speaking of which, there might be a better choice of speakers for the OP if he really wants a clean, pure sound (Class-A or not). His money would be better spent on speakers instead of amps.
Steve Dallas
Major Contributor
Even so, most towers are in the mid to high 80s, so 93 is still pretty sensitive.
What we really need to know are the OP's room size, listening distance, desired average and peak SPL.
It’s not a perfect place. You’ll get both. A thick skin helps as you separate the wheat from the chaff. Class D is your answer. Lots of power without heating up the planet more.
Musical Fidelity A370 would get you to around 185W and may be slightly more attainable than a Krell?
MRC01
Major Contributor
Possibly. But if the speakers he loves are inefficient and he really needs the power, he can get a high bias class AB amp in his price range that will deliver everything he needs. Or maybe even a class D amp. If this thread has given any good advice, one part of it is that the focus on class A as a requirement is unnecessary and limiting.
HarmonicTHD
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I know the vid. Someone won the lottery ten times over. They are lucky to be alive.
- Thread Starter
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Hi my sofa is 6.2m from where the speakers would stand.
Open to suggestions from those more versed than myself for sure!
theREALdotnet
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But “class A” sounds so… classy!
- “Tell me, what types of pupil do you have here?”
- “We have two types of pupil, class A and class B. At meal times the class B boys get priority.”
- “And the class A boys?”
- “They get food.”
(Peter Sellers, Common Entrance)
Steve Dallas
Major Contributor
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Peachtree amp500 Amplifier Review
This is a review and detailed measurements of the Peachtree amp500 stereo amplifier. It is on kind loan from a member and costs US $1,499. The amp500 comes in the same packaging of many previous Peachtree products. I wish company would innovate here as the design looks kind of dated. Then again...
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Not going to accuse you of anything. That's a whopping lot of watts for the money.People will accuse me of being a Peachtree fanboy after this, but... This will meet all your needs forever:
amp500
"No matter what I threw at my system, the amp500 consistently delivered every bit of juice that my speakers wanted, and I always had the feeling that the reserve was plenty deep. The amp500 never broke a sweat." The Peachtree amp500 features a staggering 500 watts per channel into 8 ohms and...www.peachtreeaudio.com
Peachtree amp500 Amplifier Review
This is a review and detailed measurements of the Peachtree amp500 stereo amplifier. It is on kind loan from a member and costs US $1,499. The amp500 comes in the same packaging of many previous Peachtree products. I wish company would innovate here as the design looks kind of dated. Then again...
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