Short story
I've had these two amps for about 12 years. Love them both. The au-7900 was my first foray into great sounding gear. Found it while looking for the AU-717. I paired the au 7900 with vandersteen 2c's in a small room and loved it. Then found the 717 and loved that. Forgot about the 7900 until recently and man what a great piece of gear.
Over time, after visiting friends and hearing different gear, as well as lurking a ton here. I upgraded to an audible illusions 2D recapped pre, with two bryston 2b-Lp mono blocks into late serial number 2ce's. Great budget system that is currently doing it for me and yes, I'm on a budget!.
Short comparison.
As integrated amps, they both have strong points. The AU-717 has a clarity and quickness that the au-7900 may be lacking, but what it lacks is made up for by a more lush, pretty sound with a very sweet midrange, and an overall warm character. Not as warm as the few marantz receivers I've heard though. I don't hear recessed highs at all, just a little smoothed over.
The AU -717 used as an integrated amp alone is fantastic and strong. Nice neutral character with plenty of character up top. It is a little on the harsh side, but quite powerful and clear.
I have a second system in another space with vandersteen 1c's.
I recently acquired a NAD 1240 preamp for free and decided to connect it to the au 7900 going into the 1c's. Super bassy and slightly unnatural. While it sounds just a little unnatural, I like it. When using the NAD AU-717 as a power amp, the NAD preamp going into the AU-717 sounds more normal to me, but the 1c's in my room always sounded a little bass light. So I could just be used to it.
A couple takeaways. 1c's can really manage and produce some bass, but likely because of some coloration in the setup.
Overall, I prefer the preamp-power amp setup over just using either one of the Sansui's as integrated amps alone.
QUESTIONS
Does it sound like the au 7900 needs to be recapped?
Has anyone used either of these amps as strictly power amps?
Was the au-7900 super bassy? It's almost like it is a different amp altogether from when it was being used as an integrated alone. Definitely a night and day difference vs the au-717. The AU-717 retains some of its character when used as a power amp. With the bassiness of the au 7900, Initially I thought it may be the NAD because they are known to have warm, thick low end, but it isn't there going through the au-717. The nad pre into the au-717 is just right. Very neutral, with some decent weight and wonderful dry clarity.
Lastly, has anyone tried a tube pre going into the AU-717?
Seems like the could make for a fun sound signature.
Thanks! It's a little bit too much fun talking about this, please go easy on me...
I've had these two amps for about 12 years. Love them both. The au-7900 was my first foray into great sounding gear. Found it while looking for the AU-717. I paired the au 7900 with vandersteen 2c's in a small room and loved it. Then found the 717 and loved that. Forgot about the 7900 until recently and man what a great piece of gear.
Over time, after visiting friends and hearing different gear, as well as lurking a ton here. I upgraded to an audible illusions 2D recapped pre, with two bryston 2b-Lp mono blocks into late serial number 2ce's. Great budget system that is currently doing it for me and yes, I'm on a budget!.
Short comparison.
As integrated amps, they both have strong points. The AU-717 has a clarity and quickness that the au-7900 may be lacking, but what it lacks is made up for by a more lush, pretty sound with a very sweet midrange, and an overall warm character. Not as warm as the few marantz receivers I've heard though. I don't hear recessed highs at all, just a little smoothed over.
The AU -717 used as an integrated amp alone is fantastic and strong. Nice neutral character with plenty of character up top. It is a little on the harsh side, but quite powerful and clear.
I have a second system in another space with vandersteen 1c's.
I recently acquired a NAD 1240 preamp for free and decided to connect it to the au 7900 going into the 1c's. Super bassy and slightly unnatural. While it sounds just a little unnatural, I like it. When using the NAD AU-717 as a power amp, the NAD preamp going into the AU-717 sounds more normal to me, but the 1c's in my room always sounded a little bass light. So I could just be used to it.
A couple takeaways. 1c's can really manage and produce some bass, but likely because of some coloration in the setup.
Overall, I prefer the preamp-power amp setup over just using either one of the Sansui's as integrated amps alone.
QUESTIONS
Does it sound like the au 7900 needs to be recapped?
Has anyone used either of these amps as strictly power amps?
Was the au-7900 super bassy? It's almost like it is a different amp altogether from when it was being used as an integrated alone. Definitely a night and day difference vs the au-717. The AU-717 retains some of its character when used as a power amp. With the bassiness of the au 7900, Initially I thought it may be the NAD because they are known to have warm, thick low end, but it isn't there going through the au-717. The nad pre into the au-717 is just right. Very neutral, with some decent weight and wonderful dry clarity.
Lastly, has anyone tried a tube pre going into the AU-717?
Seems like the could make for a fun sound signature.
Thanks! It's a little bit too much fun talking about this, please go easy on me...
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