2. amps-preamps
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Luxman L-550ax

Hi, 

I have just bought a Luxman L-550ax. I bought it for the reason of eventually relocating to a smaller place and need an all in one. Due to that relocation, I will eventually need to get bookshelf speakers. I've narrowed it down to the Ascilabs C6B. They are 85db at 4 ohm. Will the 550ax's 40w class A be able to drive them in no larger of a room than 15' x 20' ? 

Thanks for the help

enobenetto
bojack
690 posts
 

The 550ax is a beautiful piece, and congrats on snagging one. And from someone who listens to a 25W pure class A amp (First Watt M2) that drives a pair of 4-ohm, 86db pair of Dynaudios with absolutely no problems in a room larger than yours, I think you'll be fine. Yes, others will probably say no way, but you'd be surprised what some amps can do...it's all system dependent and what sounds good to you.

builder3
782 posts
 

I think you'll be fine. Luxman never posted the complete specs on the L-590 and L-550 amps. Their specs are on the Class A power alone, after that point they change to AB, and put out considerably more power.

bojack
690 posts
 

The 550ax is actually a pure Class A design, so it does not transition to AB...maxes our at 40W into 4 ohms.

builder3
782 posts
 

bojack, perhaps you’re correct, but that would seem unusual to me. The L-590AX is also advertised as Class A, 30W/ch into 8 ohms, but transitions out of Class A and produces around 90W/ch, 8 ohms, and something like 160W/ch into 4 ohms. I would expect the 550 to operate in a similar manner.

https://www.luxman.cz/data/test/test-en-l590axii-hifinews.pdf

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