Amps for KEF Blade 2


I am looking for advice from owners or dealers of the KEF Blade 2 loudspeakers. I am concerned my current pair of amps will not be sufficient for the B2s because of an article written about the original Blades published on July 5, 2013 in The Absolute Sound:

"The Blades have a nasty kick in their crossover that will suck an amplifier dry quicker than a student downing free tequila shots ... Just don’t be tempted to cheapskate on the driving amps, or you’ll live to regret it. Tube amps at least have an output transformer to hide behind, but when the Blades suck out a solid-state design, they celebrate by spotlighting their tweeter something chronic. To give you some idea of the lengths required, the otherwise excellent Rowland 625 [550 watts into 4 Ohms] wasn’t up to the job, it taking a pair of the 725 monoblocs [650 watts into 4 Ohms] to restore order. "

Are the Blade 2s just as demanding as the original Blades in terms of amplification? I would guess not due to the smaller 6.5 inch woofers, but this is just an uneducated guess. I own a pair of Benchmark AHB2 amps, which according to the manufacturer produce “a little over 500 watts into 4 Ohms”. Will this be enough?
e91811

I was considering using 2 amps for the Blade that I am getting. I already had a KRELL Duo 175XD and I could get a Dou 300XD for $6-7K used. However, after some research on this I came to the conclusion that a single amp is better than 2 amps, unless they were 2 amps built as mono. I sold the 175XD to buy a more powerful amp.

The Rotel Mitchi mono and the Hegel mono are what I would look at for overwhelming power and still very good sonics. Do not discount the Mitchi because of Rotel. It is a very nice sounding unit. I heard the much lower powered integrated.

 

The first time I heard the kef uniq was the R105/3 in 1990 and it stood out from everything else in the room due to the 3d soundstage and precise imaging that I bought them, wife was 8 months pregnant and we were buying our first house but I didn’t care, I had to have them. Those ended up biamped horizontally with kav 300il on top and a b&k4420 for the bass.  I expect the more power I can feed the blades the more alive they’ll be. I do wonder if the h590 is a good choice for the pre/dac should I add the T&A amp to drive the top leaving the h590 to push the bass? AT suggested the E200 dac/pre to go with the T&a A3000 but I really believe the speakers will open up even more with 2 amps driving them. 

Yea, like some of the Wilson or Darth Vadar speakers (as my wife said to the Wilson rep).  A Wilson demo with close to $300K speakers and Dagastino gear was really great but was it fun, I am not so sure. I was more fascinated by the price of the gear than into the music. I like the sense that you are transformed to the live show and I get that with the Blades. 

I like the old Blades even more than the great Vivid Giya (the most recent iteration) and that is a $100K speaker. 

Another that came to mind was MBL with all MBL gear in a large room. I did not understand the hype.

The fact tact that it does not weigh much is really a feature and not a bug. Ever see the demo with the quarter on edge on top of the Blade while some hard rock is played through them. That is some space age engineering. The Blade does not need concrete like weight to be stable.

Interesting that you thought it was lifeless. For me it produces the most realistic sound, especially for live performances. The sense of being in the audience is unparalleled with anything I have heard, even at 10x the price.

Good thing there are so many different speaker choices for everyone.

 

 

Since the blades tend towards a lifeless sound I think an amp with some life, like maybe a tube amp would do them some justice.  I had the blade 2s with the Theta Prometheus for a few years and I'm sure this contributes to my opinion of the speakers being lifeless.  I don't think the Prometheus is a lifeless sounding amp, especially for class D but with a speaker like Kef that leans towards a lifeless and dull sound you get a bad combo.  I bet a Pass amp might sounds good.  Personally I would just avoid the blade altogether, I think personally there are much better speakers for way less money and the Blade is a cheaply made speaker too, mine developed a rattle inside and just touching the cheap plastic base makes you wonder how they justify the price.  Very very cheap and light when you consider the price.  

Looks like someone demoed Kef Blade 2's with the new Hegel A30 in Munich. I was not there but read the the H30A is really good, better than the H590 and should be able to drive anything. The cost of course doubles if you're gonna use it in a mono configuration. 

 

https://www.stereophile.com/content/hegel-reference-h30a-reference-power-amplifier-p30a-preamplifier-kef-reference-5-meta

There is a Hegel H30 on USAM for $6K. I was under the impression that the upgrade to the H30I was due to part not being available to make more H30's.

I just found out that the KRELL KSA i400 was shipped out today, $36.5K

 

Wow, thanks for taking the time to answer. The T&A HV amp is within reach and looks good, but the HV pre is tough to justify at +$30k for a blue collar guy like me.

My only Krell was the kav 300il and while it's not the same level as the xd stuff it was the only piece that could tame my old kef R105\3's so I'm not surprised you like them. My problem with krell was the 575 monoblocks I heard in a fellow audiophile's home driving the salon 2's and the pairing was rough. The H590 is close but i'm starting to notice some midrange congestion I hadn't previously on some recordings, I also recently joined qubuz so it's possible the difference is im the recordings, that I can work out myself. Hegel finally updated the H30 with the H30I if I can find 1, that still leaves me shopping a dac preamp. 

Thank you for your patient reply, I'm leaning towards the T&A if I can get a decent price.

I heard the T+A top of the line stuff with close to $100K Wilson speakers (and other top end accessories). It sounded great but I think you are paying a premium for T+A that I feel you can get from similar gear (see end of post). The gear sounds a bit on the warm side and is very attractive physically.

I have been researching Blades and amps for a while now. I was seriously considering T+A (especially the integrated amp for simplicity) but decided not too because I like the KRELL XD amp sound more. I have the brand new KRELL KSA i400 amp as my top contender. I think the following 3 are similar sonically and also on my list for warm but not too warm gear, T+A, Luxman, and KRELL XD.

The Hegel and T+A are not similar sounding to my ears. I really enjoyed the Hegel top end mono blocks with the Blades. It was not the cleanest nor smoothest sounding, but it was a super fun listen. I think it was the massive power of the Hegel that made the old Blade 1 sing. The demo was over an hour in a big room (mostly just me) at a Los Angeles audio show. I still remember that sound, so engaging.

Another amp that I think could be fun with the Blade is the Rotel Mitchi monos. It is very similar to the Hegel monos I heard with the Blade 1. I heard the highest powered Mitchi integrated amp with B&W and it seemed like it was a good sound. The demo room was too bright with a lot of glass. Though it did not sound as good as the KRELL K-300i integrated amp (an XD version) that I owned.

The other sound I like is the Benchmark AHB2 (maybe my fav). I have AHB2 monos with KEF LS50 Meta and the recent Stereophile Blade 2 Meta review used the AHB2 monos. Even though the reviewer loved it and bought the speakers, I do not think it would be a good match power wise. A shame because I love the sound of the amp. The CODA #16 sounds somewhat like the AHB2 and is my second choice (and maybe more practical choice, $$ and size).

I heard the top end Chord monoblocks with the old Blade 1 about a decade ago and that was what made me want the Blades. However, it was the speaker that blew me away. The amps were OK, they did not sound as good as the KRELL XD stuff.

I think I can easily beat an integrated amps sound with a top end amp (maybe from the same brand) using a very clean preamp and good DAC. So, my future Livingroom system will be the following:

- KEF Blade 2 Meta (color TBD)

- Musetec 005 DAC ($3200) (have this already in storage in my garage)

- Benchmark LA4 preamp ($2500) (already have this in my office 2-channel system)

- KRELL KSA i400 ($35K) or CODA #16 ($15K no meters)

I have owned gear from KEF, KRELL XD, CODA, Musetec, and Benchmark. I have mixed and matched all of this gear. I am certain my choices will be perfect for my ears. The only thing I am getting dealer advice on is the speaker cables from the KRELL XD to the Blades. I think it was this one that I am getting if I buy the KRELL.

Solo Crystal Oval 8 Speaker Cable - Analysis Plus

BTW - most people would not use such a low-priced DAC and preamp, but I know what sounds right to me. Spending more on more MUSICAL gear has left me disappointed with the sound. Saying all of that my fav system right now is my tube RAAL VM-1a headphone amp + Benchmark DAC3B + RAAL SR1a/CA-1a. I think it will take the Blade system I am building to beat the RAAL office headphone system.

 

 

bump yyzsantabarbara, Did you get to hear the T&A with the Blades? I've decided to go ahead and go all in on the blades. I value audiotroys experience with the blades , but do wonder if the T&A would be rated higher than chord if they currently carried both brands. The H590 is great and for the price the included dac is really good, but if I remove the 'bang for the buck' from the equation I would expect another jump in level.

I have heard the T+A HV gear that he is referring too. It is warmer than the Hegel gear. More like my KRELL XD amp but with more power. I heard it with Wilson top end speakers. It sounded great.

I bought a second Benchmark AHB2 for 1 on my systems (maybe future Blade) last week. I am debating between using current KRELL 175XD, current Benchmark AHB2 monos, or buy one of the following, CODA #16, Rotel Michi M8 monos, or the new KRELL KSA i400 amp.

Most likely upgrade the 175XD for KSA i400 

This is going to be step 1 though only with 2 monos.

Kef blade meta quad amped with benchmark ahb2. - Imgur

 

 

I've  been enjoying the h590 with the blades, but audiotroy have me interested in the T&A gear. I don't have a local shop that carries the brand so no way to home demo, and the h590 does an impressive job of controlling the speakers.

Well I have a big update re my two week old Blade2: just sold my NAD C298 and bought the Sanders Magtech beast amp. Had the Mag 3 days now. Just ordered a better power cable; my current options here aren't heavy duty enough for it I reckon.

But in the meanwhile: sweet jebus. Anyone else ever heard this combo? 

There's nothing wrong with trying as many combos as possible b4 deciding. My 4 hour demo overnight has me really pumped about the h590, It isn't subtle though. everything on the recording will be presented in a sensory overload condition. Maybe like my 1290 sdr some throttle control will let me appreciate some of the finer things the hegel does, but right now the way the blade throws a 'stage and the thrust from the 590 make everything sound very real, I After hearing the h360 on the blades I would pass the h390 by and go straight for the 590 for the blade. it's worth it, in fact if I couldn't afford the h590 I would sell the blades and down size to something my h360 could manhandle, again. going to usam to remove my listing now.

The amp I am looking at if I ever get space for the Blades is the new KRELL KSA-400i. I never heard it and it is very expensive. However, I own the KRELL XD175 and this new amp is priced 5x more than my amp, has great power, and the same plus more features as my amp.

There was a review in Tone (I think) of the Blade by Roy Gregory (sp?) and he described his journey with power and the Blades. He needed more power than he initially tried.

My KRELL Dou 175XD likely is under powered for the Blade. The new KSA-400i, is not and it likely sounds like an even better version of the 175XD.

I sold my CODA #8 today after reading about the new KRELL. I was originally thinking of using the CODA with a future Blade.

 

H590 in the house! I’ve been talking to the shop owner that sold me the h360 since I got the blades last summer. The blades didn’t sound starved for power but the h590 does raise the bar across the board. This unit is said to be new in box for axpona and demo discount applies, at least I think so. If this is the same price as the other store demos I’ll probably buy it. Bass is tighter and everything else is just more. The 590 sounds like it has more control at all fq’s, more than I would expect an additional 50 wpc to sound like. I’d bought a project s2 digital to piggyback the h360 for full mqa and a new dac but I think the card in the 590 is acquitting itself nicely. More to come.

I did buy the Blade 1's and my hegel h360 has plenty of power to drive them. I was thinking of upgrading to the h590 but the h360 is really getting it done.

I have had the Blade2 for two days. Using my NAD C298 amp and it's going swimmingly. 

I have had the Blades for one week. Currently running on woefully under-powered NAD M3 integrated (described as dual mono block design) and actually the Kefs sound rather good.
I have the h360 and used it to drive a pair of salon 2's which it did nicely, but not dynamically and that's a deal breaker for me. When I suggested bi-amping horizontally the crowd' overall said it wouldn't make a difference? My h360 isn't going anywhere and I expect the Blades will sound the same, as in 'good but limited'. What do you guy's think? if I bought a pair of steller 700's to run the bass and the hegel on top would that be enough headroom to let these sing? 
I've heard the KEF Blade 2 with Hegel H360 and their reference separates and it was very good on both. Also heard the big Blade with the Luxman 900 separates and again it was really good. Not sure which I liked best since that was around 6-8 months apart. I was surprised how good the H360 was with the Blade 2s though.
KEF uses a variety of amps to demo the Blades. The latest love connection seems to be with Hegel. The new Hegel 590 integrated and the Blade have some sort of development deal.
KEF uses Electrocompaniet Nemo monoblocks to drive the Blades in their factory museum:  https://www.youtube.com/watch?v=ZQBOMv4LY2E

They might know a little something about driving them....
Wcfeil just read some of your responses.

A forum is a place to exchange ideas on the topic at hand.

Read all 7 of your responses almost everyone of them is off topic.

In the future add a direct ancedotal story or raise a point that furthers the conversation I am quite sure most people are turned off by your immature drivel.

Please tell people your direct experience with Kef Blades do you own a pair?

We do. 

Dave and Troy
Audio Doctor NJ
Thanks again for proving my point. 
I don’t need good luck though. 
Post removed 
Post removed 
yes wcfell we are selling truck loads of gear all over the country.

Our responses are usually short unless we are being attacked which requires long rebuttals sometimes to prove a point

Again wcfell unless you have personal experience with us how do you base your opinion on forum posts?

Most intelligent people seek knowledge from the source rather than relying on heresay.

Good luck to you.

Dave and Troy
Audio Doctor NJ
Conversely, many find you pompous, self absorbed, and long winded concerned only with the an inherent interest of financial gain couched within the guise of “providing information based on lengthy experience “

The door swings in 2 directions. 
Last point D2girls, please check our Google reviews of people who have actually been to our shop, many people who have shopped with us have said we have a wider selection of gear then anyone in the state of NJ and we have a larger and more diverse collection of gear than the NY City stores.

https://www.google.com/search?client=aff-maxthon-maxthon4&channel=t26&q=audio%20doctor#lrd=0...,,

Who in the New York area has a wider selection of affordable high performance  speakers: we have: KEF, Dali, Paradigm, PSB, ATC, Quad, Elac, Cabasse, Rethem, Legacy and we are playing with Bache. 

Digital where in the area can you hear: T+A, Lumin, Aurender, Baetis, Naim, Mytek, Aqua Hifi, Light Harmonic, M2 Tech, and a few others.

Electronics: Naim, Manly, CJ, T+A, Electrocompaniet, Anthem, Unison Research, Mytek, Nuprime, Micromega, Parasound, Nad, Nad Masters, Cary Audio, Synthesis, Audio Control and a few others. 

d2girls, your attitude is appalling, you don't know us, never directly talked with us or have visited our shop.

We have many followers here on Audiogon, who follow our posts who find our perspectives and experience to be very beneficial.

Dave and Troy
Audio Doctor NJ
d2girls you talk to much without adding anything. Please keep to the topic which is Kef Blades.  Which we have on display and have been working with them since they premiered on the market.

We have been working with KEF for quite a number of years and have paired them or tested them, with Hegel, Luxman, Parasound, Devialet, Norma, Naim, Coda, Micromega, Anthem, Nuforce, Electrcompaniet, Chord, Merrill Audio, Manly Labs, CJ, and T+A audio.

As per shitty store, most of the people who have been here have commented on our remarkably diverse selection. 

https://www.facebook.com/audiodoctor1/photos/a.122499441156611.22641.122499304489958/177449732262347...

https://www.facebook.com/audiodoctor1/photos/a.122499441156611.22641.122499304489958/177444129596240...

https://www.facebook.com/audiodoctor1/photos/a.122499441156611.22641.122499304489958/122499444489944...

https://www.facebook.com/audiodoctor1/photos/a.122499441156611.22641.122499304489958/188427020831285...

it is a shame that you would not be allowed to set foot in our "shitty store
 which has one of the best collections of gear in the New York Metro area.

Dave and Troy
Audio Doctor NJ

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Jrfa, sure you may love the results but without auditioning  other gear on the speakers we don't think you  are scratching their true potential.

We have heard startling differences between $15k and $35k digital front ends how do you think a $500 dac will sound compared to such expensive digital front ends? N

Most people do find the Emotiva stuff to be great for the price but great for the price doesn't necessarily mean it perfoms great.

Personally we would never recommend such pairings as you are dramatically undercutting what the speakers can really sound like. 

Dave and Troy
Audio Doctor NJ
own b2 for 2 yrs. driven by emotiva dxa1 GEN 2 and emotiva dc1 stealth dac / pre.

love the results. no issues whatsoever.

upgrading to blades and plan to use same components
Hi Dave,

I appreciate your comments. But in this case, ghosthouse better understood the essence of my comments. Yes, I have not heard the T+A gear with Blade Two's, just the Hegel H360 and that is what I was trying to convey.

I have heard much of the T+A HV series gear with Wilson and liked it alot. Had hoped to hear it with the Persona's, based on your comments, a few months ago, but when I was at the dealer the HV integrated was on loan.
I think you did.  He wasn't touting the Hegel as endgame electronics for the Blades, merely commenting that the sound was good even given the disparity in price between that speaker and those electronics - possibly indicating the Blades are electronics-friendly.  Regarding your comments, I've no doubt the T+A brand is a well-qualified member of the highest echelon of audio gear.    
No Ghosthouse, I am not. Pokey has not had the opportunity to compare a product at the Hegel level to the T+A on the same speakers like what we did when we were shopping for replacment electronics. 

We are always amazed at how good some reasonably priced components can sound, the difference is are you getting all you can out of the speakers?

Dave and Troy
Audio Doctor NJ
Pokey sure they will sound good, but good isn't amazing. When you use uber class electronics the speakers become much more holographic and the sound stage gains huge amounts of width and depth. 

There are tons of very capable components but you have to hear an uber class component and you will know just what special is.

We demoed a $11k T+A R2500 integrated amplifier and it just was a relevation compared to all the other great intergrated amplifiers we had in that room. 

The T+A had a sense of rhythemic drive that the others didn't have, macro dynamics, along with a huge three dimensional soundstage, superior resolution and bass definition. 

The result is that this piece just made music intoxicating and you were drawn in.

When you hear a component which does this you will understand the world of what makes great from good. 

Think of it as tasting the highest quality freshest ice cream where you can taste all the components that make up the flavor, distinctly and yet enjoy the blended quality of the taste, and you can experience the creamy smoothness. 

Whether you are comparing high end audio gear, fine food, Scotch or other things of this type there are those stealler products that you can just expereience their superior refinement. 

Dave and Troy
Audio Doctor NJ
I heard the Blade Two's at the LA Audio Show with the Hegel H360 and it was surprisingly good. A $6k retail integrated driving a speaker of this magnitude may indicate the load is not all that difficult; just a guess on my belhalf. I'm sure there are better pairings, but for the cost, it was really pretty good.

For those guys who say yeah right prove it here you can see all the gear we tried with the Blades:

https://www.stereophile.com/content/kef-chord-audio-doctor

https://www.google.com/search?newwindow=1&client=aff-maxthon-maxthon4&affdom=maxthon.com&...:

https://www.stereophile.com/content/audio-doctor-searching-best-everything ( notice the Electros the Chord and the JC 1 same setup then replace the 207 with the Blades

now see the Blades in the same space as the 207.2

https://www.youtube.com/watch?v=1NPIn3pEmI4

Long story short, the T+A gear was the best solid state we ever ran with the Blades, as well as the Persona 9H

https://www.facebook.com/audiodoctor1/photos/pcb.1632190780187462/1632198643520009/?type=3&theat...

We also tried the Thrax gear, the Devialet D400 monos, CJ Arts and a few others the T+A gear has so far come the closest to the mega dollar gear for a fraction of the price which is why we recommend it so highly.

Dave and Troy
Audio Doctor NJ
Guys as a Blade dealer having both the JC 1, Electrcompaniet, Chord and T+A electronics on the Blades.

Here is our take, the JC 1 were okay amplifiers, not magical and not worth the hype, the Electrcompaniet AW 400 were fantastic and dramatically outperformed the Parasounds, the AW 400 also came down in price to $12k vs the nearly $10k price for the JC1.

A pair of Chord SPM 650 monos were a bit better, and the $32k Chord SPM 1400 were amazing.

We lost the Chord line due to not enough sales, brought in the T+A electronics and quite frankly outperformed the Chord stuff.

We have used the big T+A amp and preamp with the Blades and the sound is amazing! Huge soundstage, fast, tight bass, warm midrange, fantastic stuff.

If you are on the East Coast come in for a listen. 

Dave and Troy
Audio Doctor NJ
dbphd,
I only noticed today that you had asked me about whether I had the Blades in a previous post. Sorry for not responding. I do not own them yet but today I have the money to buy them (worked a 2nd job for them). So some time in 2018 I will buy them.

I am actually now going for the Blades for my office because I have a new baby (who is very active at 19 months) and I am seeing that the living room could be problematic. Another poster on A’Gon related that he was able to get the Blades to sound good in a 14 x 13 room so that gives me hope for the office.

Just as an FYI, I have a few choices in electronics to figure out from the following list:

1) [PS Audio DS DAC or Mola Mola Tambaqui DAC] + MD 102 Analog Tuner + new Luxman 509x integrated. Not sure if it has enough power, but most reviewers state that Luxman underreports the power specs. I we see soon enough.

2) Briscati M12 (DAC + analog volume) + MD 102 Analog Tuner + [Theta Prometheus or Benchmark AHB2 or Luxman m900u or Briscati M15]

3) Mola Mola Tambaqui DAC (cannot use my MD 102 tuner here) + [Theta Prometheus or Benchmark AHB2 or Luxman m900u or Briscati M15]. Sell the tuner and listen to my beloved KRCW via internet.

I had a large list of high end integrated’s I was looking at but I am starting to see that there are a few really high quality DACs with good volume control or preamps with built in DACs.

yysantabarbara,

I was disappointed with the Parasound A23 driving the LS50s, but the A21sounded very good.

I replaced a Proceed HAP 2 with JC 1 monoblocks to drive KEF Reference 107/2s.  The improvement in sound wasn't subtle.  The JC 1s really made the 107/2s sing.

Without too much trouble I could try the Ayre KX-5 Twenty preamp with the JC 1s and 107/2s, and it's something I should do.  OTOH, perhaps I should just keep my beloved 107/2s and forget the Blade 2s.

db
e91811,
Thanks for the feedback. I will have to do the home demo with the Benchmark amps. I was also thinking of the PS Audio DS or the Briscati M12 (soon to include ROON via ethernet).

dbphd,
I think the Ayre maybe a little weak for the Blades from what I have read about the Blades.The JC1 is a popular amp for the Blades. I heard the Hegel 360 integrated with the Blades and it can drive it well. Another alternative amp, and 1 I am considering along with the Benchmark, is the Theta Prometheus. A fellow A’Goner sent me an email indicating that it was a phenomenal combo with the Blades. A well known KEF rep came to his house and said it was one of the best Blade + amp combos he had ever heard. I won’t get into details of the email since it was a private message. The Theta measures similar to the Benchmark but 2x the cost..

I also have the KEF LS50 and I am amazed at how good it now sounds with my new integrated, a PeachTree Nova 150 ($1500). My prior amp, a Parasound A23, never sounded this good with the LS50,



Fantastic together. I have been on the audiophile merry go round for more than 25 years. I use a Mac mini into a PS Audio DirectStream DAC directly into the amps. I’m done. This is my “forever system”. Good luck to all of you and merry Christmas!