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Amplifier ideas with KEF Reference 1

I'm thinking about pulling the trigger on a pair of KEF reference 1's for my 10'x14' office (currently LS50's). Current electronic setup is all PS Audio (bhk monoblocks, bhk  signature preamp, directstream dac). Incredible sound, zero complaints other than the fact that the monoblocks run hot. I'm getting cooked so the whole ps audio setup is listed for sale.... Although it just may end up at home for a future 2 channel setup!

So with that background, please share ideas for a high quality system that's cool running. Budget up to $15k. I'll add that I favor the warmer side of the spectrum. I'm a bass player and like tight, fast, deep bass..... Glorious mids, and smooth highs. Current ideas to match with the  KEF Reference 1's include:

1. Bel Canto Black EX (integrated or the separates). My contact says the separates are far superior. I'm concerned this setup is too analytical. Anyone heard them?

2. Bel Canto Ref600m. Keep my directstream dac and bhk signature preamp. Probably more than good for an office!?!

3. Hegel 360 or the new forthcoming monster integrated (590)? They're not too pretty to look at but it seems like I've read about hegel and kef being matched at several audio shows. Is there a hegel house sound particularly with the KEF’s?

4. McIntosh mc611. I'll admit it.... I'm a sucker for the looks of McIntosh plus their easy listenability. I've never had ear fatigue listening to a McIntosh setup. I'd be keeping the directstream dac and bhk signature preamp for this combo. Afraid that is be giving up a lot going from the bhk monoblocks to the McIntosh with similar heat. 

5. Luxman L509x. Brand new. Supposed to be very musical and runs cool. I'd probably run with the directstream dac. 

Your thoughts / ideas are appreciated.... Especially if you've heard the recommendation with KEF reference 1's. It's all about system synergy, right!?!

thank you,
ken


keoliphant
georgehifi's avatar
georgehifi
10,312 posts
 
I also don’t think that Stereophile uses simulated measurements any more either.
Really?? taken just three days ago.
Again the wavy one is into an easy simulated Kantor load.
And this is what you’ll hear, bad dips at 200hz and 5khz, and peaks at 60hz, 2khz and 10khz.
In other words this amp will sound very coloured (like it’s been EQ’d), because it’s not flat even into an easy speaker load.

https://www.stereophile.com/images/718BP21fig01.jpg
Fig.1 BorderPatrol P21 EXD, 8 ohm tap, frequency response at 2.83V into: "simulated loudspeaker load" (gray, wavy trace).


keoliphant seeing your budget is up to $15k a quick search I would recommend this $12k GamuT Di150 LE integrated amplifier as it gives good current ability and remains quite flat with the simulated load and will also stay reasonably flat with the Kef’s load.
https://www.stereophile.com/images/417Gam150fig01.jpg

https://www.stereophile.com/content/gamut-di150-le-integrated-amplifier



Cheers George
georgehifi's avatar
georgehifi
10,312 posts
 
Here are a few integrates that have simulated easy load tests done by Stereophile most don’t become tone controls that you and others have mentioned.

Belcanto Ref600 good
https://www.stereophile.com/images/916BC600fig1.jpg

Lux L509X good
https://www.stereophile.com/images/518L509fig01.jpg

BelCanto Black good (fine plot)
https://www.stereophile.com/images/615BCBfig12.jpg

This T&A V10, didn’t fair too good
https://www.stereophile.com/images/archivesart/V10FIG01.jpg

Ayre AX-5 good (much finer plots)
https://www.stereophile.com/images/713AX5fig01.jpg

Peachtree Nova 300 was good but droops up high.
https://www.stereophile.com/images/517PN300fig01.jpg

Benchmark AHB2 also good (fine graduation plots)
https://www.stereophile.com/images/1115BAHB2fig01.jpg

Cheers George
yyzsantabarbara
4,808 posts
 
@georgehifi The Benchmark AHB2 is not an integrated. It is an amp only.  I use it in my office.

@audiotroy Is the 14 x 10 room adequate for the KEF Ref 1? The room seems a little small to me.
keoliphant OP
86 posts
 
@georgehifi thanks for the additional suggestions... The load plotting analysis is above my pay grade! Do you know if the Gamut runs cool? That's paramount for this office setup. 
georgehifi's avatar
georgehifi
10,312 posts
 
keoliphant OP28 posts06-28-2018 1:20am@georgehifi thanks for the additional suggestions... The load plotting analysis is above my pay grade! Do you know if the Gamut runs cool? That’s paramount for this office setup.

To make sure ask the retailer to have it switch on,, at idle (no music) for an hour before you get there, and feel it. In a small office this should be around the temperature in will be running at.

Looking at the size and density of the heatsinks, should be warm at idle, or low to medium levels, hotter if it’s loud for a period of time.
It say in the review it’s total bias is 14w class-A, 7w per channel this should be warm to the touch. In the bench test when it was run for 1hr with continuous sine wave (RMS) at 1/3 power it got hot, but any linear amp will do this.

Cheers George
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