There is also the QSC GX5.
- 374 Posts. Joined 6/2007
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There is also the QSC GX5.
I have a Crown XLS1000 here and I am not even sure if the fans ever kick in or not. They are certainly not audible if they do, over the noise of the cooling fans in my media closet and the fans in the couple of drives connected to the HTPC computer. In a domestic application these amps are just taking a stroll in the park every day - it's probably safe to disconnect them.
Crown amps are Class D and Emotiva amps are Class A/B. Class D amps are way more efficient than Class A/B (90% or so to 50% or so). Because of this they run a lot cooler (les of the electricity is converted to heat and more to sound) - this means they don't need huge heat sinks, which weigh a lot. Class A/B amps also have large power transformers too.
So weight is not an indicator of quality when comparing Class D with Class A/B. It might be a useful indicator when comparing Class A/B with A/B - a heavier amp will likely have big transformer, heat sinks and capacitors - all important components in a quality amp, so there a heavier amp *might* be better than a similarly specced and sized competitor. Note I did say 'might'.
Crown amps have good reputations. They are designed for a life on the road so they are incredibly tough and durable. They also have a 5 year 'no quibble' guarantee. I'd say that a used from, from a reliable source, would be a good buy - they are designed to be very hard to abuse. The main issue is the fan and if it makes a noise you can't live with. My gear is all in an external closet so this is a non-issue for me. If the amp was 2 feet from my MLP it might be different. Also, some would say they look pig ugly, but that is in the eye of the beholder. Personally, I don't dislike their looks. One other point - the rack ears are built in - they cannot be removed, so if you are installing in a limited width space, remember that.
Don't worry about having an amp with more power than your speaker's rating. That rating is for a continuous sine wave input - not something you will do in real life. You are more likely to harm your speakers by using an underpowered amp than an overpowered one because it is easier to drive the underpowered amp into clipping, and clipping is potentially harmful to speakers. That's another plus point for the Crown - it has clipping indicators - something almost never seen on 'consumer' amps (maybe they don't want you to know?).
You should be fine. If unsure check your AVR or AVP user manual for its output level.
My Onkyo 5509 has a nominal 1v on the RCA preout and 5.5v on the XLR output.
Sensitivity for full rated power into 4 ohms of my Crown XLS1000 Drivecore amp is 1.4v. I could use the XLR outs on my 5509 but you may not have them on your unit.
This might indicate that I may not be able to get the full rated power of the amp using RCA outlets, but then again I don't actually need 1000 watts! (Bridged mode, 4 ohm, which is how I use it).