Amp shootout.....Tenor 75wi verses Berning ZH270


in a recent thread there was much discusion of the above 2 amps, whether the Berning was indeed an OTL, and which one might be better.

i have no opinion as to whether the Berning is an OTL. but today a Berning ZH270 owner brought his amp over to compare to my pair of Tenor 75wi's. my system is OTL friendly, with easy to drive speakers, so the Berning's acknowledged advantage in driving difficult loads was neutralized.

these amps have very similar power, the Tenor is 75 watts into 8 ohms, the Berning is 70 watts into 8 ohms. otherwise it is not really a fair comparison....the Tenors are $19900 a pair, the Berning $4500, the Tenors weigh 70 pounds each, the Berning weighs about 10 pounds.....it seems like Goliath verses David. the result is somewhat closer than that.

we played three different discs and each of 3 people listened to their disc in the sweetspot. the Berning owner felt that the Tenor had a more dimentional sound, deeper soundstage but felt the Berning was equal in bass extension and detail retreival. the independent listener felt the Berning was excellent for the money but not in the league of the Tenor in any paramter. my perception was similar to the independent listner; that the Berning, at $4500, is amazing in it's top to bottom excellence, dynamics and musicality.....but....does not do things like the Tenor. the sense of space, detail in the soundstage, texture and microdynamics of the Tenor are at a whole different level.....and they better be for $15000 more.

like the Berning owners, i am a shameless Tenor lover and consider the Tenors better than any other amp i have heard at any price, assuming a reasonably easy load to drive.

the Berning is more like a $8k to $10k amplifier.....and Berning owners should be justifiably proud of their amps.

i did think the Berning had slightly more bass slam than the Tenor, but with much less bass articulation and extension than the Tenor.

we spent the rest of the enjoyable afternoon listening to some great vinyl......an enjoyable time had by all.
mikelavigne
Mike please don't bite Kwann!

If you believe you have ony pair of 1d, maybe also believe moon made of green chese? Kwann hear 1d in Holland and 1A refrence in Belgium. If you like 1d, that all that matter!
Kevin, i recieved my 1ds in November 2001, they were the first set made. no other sets of 1Ds were delivered until January or Feburary of 2002. if you heard them in Holland, was that in Charles von Oostrom's room?

i am curious about your speakers.....are there any pictures or descriptions of this speaker on the web? i poked around a little and couldn't find any mention of this speaker or brand.
I've read this thread with great interest. I roamed
around the SET OTL world before I finally chose the
Berning Siegfried 811-10 amp, which is the 12ish W/Ch
version using Svetlana 811-10 output tubes. He also
makes a 300B output version, but from all I'd heard and
read the circuit is really optimized for the 811-10 and
sounds great. Also, 811-10 tubes (and 572-10) are
plentiful and cheap.

I wrote to the editors of Listener magazine a while back
and asked them to do a shootout of the various OTL
amp designs . . . certainly there are differences between
circlotrons vs. ZHOTL vs. other strategies. I also think
that the ZH270's performance in these listening tests
is wonderful, considering what I perceive to be its place
in the world of amps.

In my mind, opinion only, the ZH270 represents a tubed
"workhorse" amp which is a great-sounding bridge for
folks who are used to very-high-quality solid-state
equipment and want to move into tubes. Of Berning's
commercial line (prototypes aside), it is definitely
the beefy brother intended to drive lower-impedance
lower-sensitivity (read: SS-type) speakers well. So
you can get into great-sounding tubes with your
existing Linns or whatever it is that strikes your
fancy.

Of course, there's a lot of taste-issues (chacun son
gout) in tube amps. There are hard-core tube-ophiles
(like me) who greatly prefer low-powered SETs with
high-efficiency speakers, and I can tell you that as
far as that goes, the Siegfried is one of the best
options on the market, and is also is a "good deal"
($5K-$6K) relative to other high-quality SET/OTL amps.
Speakers are arguably the weakest link in my system;
I've got an "inexpensive" pair of Moth Audio Cicada
horns that the Siegfried drives with aplomb. And with
bass, more than you'd expect from their low-end rating
of 60Hz.

Anyway, I guess I just wanted to say that I think the
discussion is quite interesting, but there are (as folks
have mentioned) a LOT of different ways to use tubes.
Push-pull OTL (like the ZH270) is a relatively uncommon
beast; OTL is more common in the low-powered single-ended
triode realm. So who knows.

Also, regarding NOS tubes. I think you can make a huge
difference with the tubes. Not so much with the outputs
as you can with the inputs, as someone has mentioned
using NOS 12AT7s. The Siegfried has 6 triodes/channel
in the form of 2 6SN7s, 1 6J5G, and the output 811-10.
I've got 1940s VT-231s as the 6SN7s and 1950s Tungsram
6J5Gs, and I think the sound is a world better than it
was with the stock Russian stuff. That said, I think
Svetlana and Sovtek are putting a lot into R&D in their
new tube designs (like 811-10, 6H30Pi, etc.) but don't
do as well with their remakes of old designs like 12AT7.

Sorry to ramble. Great discussion!

Stuart
Allanbhaganinfo: You are talking about apples and oranges. While the Berning amps are quite a value at the 2500-4000 that people are paying for them, they are not comparable with the other amplifiers mentioned. The Tenor amplifiers currently stand alone on top of the market, given the proper speaker. The Lamm's and Atma-sphere are next if more power or a transformer is needed. The Berning's are just a great $4500 amplifier.

We Tenor owners are not confused or questioning our purchase and have nothing to justify to anyone. It is the Berning owners that appear to constantly desire the comparison to justify their purchase.

Just enjoy your amps, they are terrific for the money.
"The Tenor amplifiers currently stand alone on top of the market, given the proper speaker. The Lamm's and Atma-sphere are next if more power or a transformer is needed".

Jtinn - You better clarify that statement or we'll end up with the ss guys over here and it may really get ugly :)