LS50's Inbound - Need Amplification Recommendations

RDSChicago

Well-Known Member
Nov 12, 2013
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My Kef LS50's arrive tomorrow. This is my first post!

I have the following amplification to drive them:

1) Denon 4311ci - 140 wpc into 8 ohms - fairly high-end Denon from a few years ago - can independently run the receiver as a 2-channel or 2.1 rig independent of my 5.1 setup.

2) Nad 2400 power envelopes (have a pair) - could be used standalone (100 wpc) or bridged with double the power, although I don't have a preamp

3) vintage 1980 Technics integrated amp rated at 100 wpc (using it to drive my Kef 105/2's) - this amp is an underrated beast - even with these Kef monsters I can't turn the volume knob past 10 o'clock without the room shaking

Which of the above three would work best with the LS50's? I would prefer the Denon for ease and simplicity as it runs my 5.1 home theater and is already networked so it could steam in my music on my Mac.

I have been hearing great things about these speakers with tubes. Was considering the Rogue Sphinx based on the positive reviews and moderate price. Does one get the special tube feel via the preamp having tubes? If not the Sphinx, what else would sound great without breaking the bank?

Your expertise and experiences with the LS50's and/or any of the aforementioned amplifiers, in addition to other amp recommendations, would be most appreciated.

Caveat: I lost my hearing in the right hear from an inner ear balance condition and have a mild loss in the left. I therefore listen at what most would call high volume levels. I posed this query to a speaker guru and he unsympathetically told me I should limit my listening to music with headphones, which I won't do as I have enjoyed listening in larger environments than between my ears for my entire 52 years.

Thanks for your ideas/suggestions.
 

mep

Member Sponsor & WBF Founding Member
Apr 20, 2010
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Why not try all three combos? You can use the Denon 4311 as a preamp to drive the NAD amps. You can use the Denon 4311 by itself, an you can use your Technics integrated amp.
 

RDSChicago

Well-Known Member
Nov 12, 2013
135
87
333
Good thought. I will definitely do so but not certain how to connect both Nad's to the pre-out?
 

RDSChicago

Well-Known Member
Nov 12, 2013
135
87
333
Also the Nad's have input levels so I can run a source directly into them without needing a preamp. If I want to do this using both amps in bridge mode so I have 200 wpc going into each speaker, can someone explain to me how to set this up? Could this be accomplished without a preamp?
 

mep

Member Sponsor & WBF Founding Member
Apr 20, 2010
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Good thought. I will definitely do so but not certain how to connect both Nad's to the pre-out?

I thought you were going to run the NADs as monoblocks?
 

mep

Member Sponsor & WBF Founding Member
Apr 20, 2010
9,481
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Also the Nad's have input levels so I can run a source directly into them without needing a preamp. If I want to do this using both amps in bridge mode so I have 200 wpc going into each speaker, can someone explain to me how to set this up? Could this be accomplished without a preamp?

It can be done as long as you only run digital sources.
 

Phelonious Ponk

New Member
Jun 30, 2010
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The Dennon will be fine.

Tim
 

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