*  ECL82Differential PP HP Amplifier D.I.Y

ECL82 Differential Push Pull Head Phone Amplifier

HP Amplifier

ECL82 Differential Push Pull Head Phone Amplifier

ECL82 HP PP Amplifier

Schematic diagram of ECL82 PP Head Phone Amplifier

This is Head Phone Amplifier using differential push pull amplifier. can be use for your
high effience speaker like a over 90 dB/w/m.ECL82/6BM8 are audio valves and you can get
around 2.5 W rms when use single ended mode.Differntial Push Pull Amplifier does not get
good power and get some 2-3 W rms.very low distortion as you know.low distortion so I
think good for Heas Phone. sound is very natural with CX 580 Senheisser inner phone head
phone.Good Bass and mid, high range are very so nice.can be use from 15ohm to high impedance
head phone.also good for high end model of Audio Technica Head Phone.
This type of Differential Push Pull Amplifier often made osclation when built up.
need high technic for build up point to point wiring.if bad made amplifier.
may be get some osclation at high frequency range.
please see other web site of Japanese how to make Differential push pull amplifier.
no easy fixed solution but not difficults.good luck and You will be get good sound
from Speaker System.
one thing I had problem with 6BM8 electro-harmonic.getiing low level ham noise.I have
3 pair of ECL82 .Svetlana is good and NOS RFT are nothing problem but only EH 6BM8 had
low level noise.so if would like to build up an amplifier be carefull to use EH 6BM8.
or don't use EH 6BM8 for Risk.

Frequency response is 15Khz to 75Khz -3dB at 1W rms and 1Khz DF is 2.5
DF is changeble from 0.8 to 2.5 with switch.out put impedance is 8 or 16 ohms.

for client

ECL82 All Differential Push Pull Head Phone Amplifier

Side View

Side top View ECL82 HP Amplifier

at home

Testing Differential Push Pull Amplifier for HeadPhone

Back View

Back View 2 input and Binding post for Speaker

Japanese versionlink

all documents are edited by Blue FishHere

Comments about ECL82 Differential Push Pull Head Phone Amplifier

I tell them that the weekend I was briefly comparing the amplifier Mizushima against
OBH 21 Special edition of Creek. It must be said that a tube amp is worth approx.
a little more than twice the SS.

Used Headphones, Sennheiser HD 600 with Cardas cable, AKG 601,
Audio Technical ATH M50 Professional exterior waterproof.

Then you are my findings:

Mizushima: I would say their sound is more advanced in the voices thus achieve
close to the singer and the band behind him, is clearly better than the creek.
I would say it has a more realistic soundstage with less "air".
Creek: The sound is flatter, all interpreters are level, highlights the sense
of "air" in the environment, open sound.

High, low and middle
Mizushima: Low fat and more liquid, more advanced means and corporeal, silky treble,
noted that no note at all coloring in fact no record of being a warmer sound a hair falls into excess.
Creek: Low more controlled, more laid back sound, airy treble but with less body, nor is noted coloring.

Mizushima: Notable at this point I think is a strong aspect of this amplifier,
one notices details that are absent in the creek. I think that is where most good quality note.

Best match with headphones.
Mizushima: The best match I did with the Sennheiser HD 600, really perfect complement to the amplifier,
the enormous soundstage spatiality generates a lot of senn additionally good bass amp lends weight
to the headphones. The final sound is generally very relaxed.
The second best match was the ATH M50, achieved a very good balance, the ATH are very flat (professionals)
and are complemented perfectly with the Mizushima, the sound is more alive than with the Senn,
the only detail is that the ATH to be much lower (headphones closed) in some issues a little.

Creek: The best match is achieved with the AKG 601, these headphones have a very warm sound
(one of his brothers on their thanks for 701) so the SS amplifiers matching is excellent.

To conclude:
The ATH Senn and sound better with mizushima amplifier, and AKG 601's sound better with the Creek.
But the overall sound or ATH + Mizushima Senn is clearly superior to AKG + Creek.

working as an Amplifier:

this headphone amplifier is able to drive my 93db
Triangle Naia at a decent volume. the SPL was almost as big as with
you digital model, I compare the two and the tube one it is definetly
more pleasent.
It is amazing how only 3 watts can do this,

comments from Mr Gustavo Villa on 10th Dic 2009, Vina del Mar Chile.

other link for PCL86 PP from LinkOut of Site of mine
Triangle Naia

Triangle Naia 93dB/m/w Speaker System


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Last up date 10th Dec 2015

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