Ultrasone 650 Pro headphone offers 2
separate detachable cables and a pair of ear pads for more cable option
changes. Pro 650 produces 3-dimentional, open, balanced and crystal clear
Reference price: $320
This Pro headphone model of Ultrasone
coming from Germany definitely wins the audience’s hearts thanks to Safer
Hearing policy, applies 2 safe listening technologies: Ultra Low Emission (this
"ULE shield" can reduce the radiation which harms our ears by up to
98%) and S.Logic Natural Surround sound (which is able to reduce the sound
pressure levels by up to 40%). Please pay attention that, S-Logic technology
doesn’t mean the surround effect in 5.1 movie watching, it still provides the
original stereo sound and creates the 3-dimentional sound stage as well as
reduce the sound pressure levels due to Ultrasone’s putting it in off-center
ear-cups, not perpendicular with the external ear canal. Therefore, the sound
goes into the ear canal 50% as well as the ear helix 50% and then the sound
pressure on ear reduces by up to 40%. Besides, the S-Logic design offers
3-dimentional image sound and natural sound.
The above mentioned technologies were only
for Pro series of Ultrasone to protect ears of recording experts, singers or
musicians who spend plenty of hours every day with headphone; but in recent 5
years, all headphones of this company are integrated with these technologies.
A set of Ultrasone Professional 650 which
is on sale in Vietnam market includes 2 cables, one is in a spring shape and
one is the normal flexible cable. They are 3 meter length, detachable and you
can plug them in the headphone whenever you like. Pro 650 is equipped with
gilded 6.3 mm jacks along with a gilded 6.3/3.5 mm converter. Besides, it also
has a pair of spare ear-pad; a demo CD; a manual.
The rear of the headphone is made by
stainless and non-magnetic steel
Give it a go with Ultrasone 650 Pro and
Stride headphone amplifier of Furutech by playing famous music video clip on
YouTube. With “Money, Money, Money” of ABBA, the music harmonies
accurately, perfectly with the singers’ voice and music instrument’s tone. In
comparison with Shellac Disc played by Pioneer XL-1551 disc player,
Rogue Audio Cronus Magnum integrated amplifier and a set of Pro 650 headphone,
they are absolutely similar; however, sound created from the Shellac disc are a
little bit more alluring due to its pure analogue.
Let’s continue our journey into the
classical music world, firstly with Helmut Walcha, a significant world statue
of Organ and Clavecin of the 20th century owing to his spectacular
Bach music performances. With “Art Of Fugue BWV 1080” of Bach, “Contrapunctus
14” is performed on church organs, organ tone is partly lower than contrabass,
higher than the vast majority of high-toned music instrument such as piccolo
flutes. In the song “Fantasia in G major BWV 572” of Bach, the
treble tones are so sharp and detailed, soft and gentle bass with the highlight
of resounding, fantastic and deep harmonization.
Move to the video clip in which Helene
Grimaud plays “Rachmaninov Piano Concerto No2 in C minor op.18” of with
the orchestra conducted by Claudio Abbado. The beginning music of the 1st
chapter is slightly ponderous, solid but vast and spacious. String instruments
from violin, viola to cello and contrabass groups play so amazing. A solo
clarinet performance and other flutes and drums play so fantastic and aren’t
sunk within the orchestra performances...
A set of Ultrasone Professional 650
includes 2 detachable cables
When hearing video clips with headphone
directly from Dell Vostro 1310 laptop, not through headphone amplifier, the
sound is as impressive as our expectation; however, it is totally acceptable.
The created sound is so rustic, natural in lower definition.
Nevertheless, if we continue to give it a go with MP3 files in the computer and
in CD, level of impression increases tremendously in succession for each
In testing with CD Glen Campbell – “The
Very Best Of Glen Campbell”, performance of 650 Pro together with laptop
Dell Vostro 1310 bears a big resemblance with Ultrasone Zino headphone, Stride
headphone amplifier and Dell Vostro 1310. Switch into CD Thanh Lam Acoustic,
the most significant point is the singer’s voice whereas performance of
percussion and other instruments such as guitar lead and bass, violin, piano…
are so great.
With CD “Rest Your Mind To The Music”
of Maersk Line (produced in the Netherlands in 1996); hi-end music quality is
proved obviously. The song “Morning Mood” of Edvard Grieg which is
performed by Berliner Philharmoniker affirms the fact about its quality again.
Change into the song “What A Wonderful World”, it plays such great with
the world number 1 trumpet player Louis Amstrong as a singer with his special
husky voice. Switch to “That’s Why”, rock music is played by the 650 Pro
just like in the studio, so wonderful… Through 15 tracks of the album, plenty
of song in many genre of music in 1990’s is performed pleasantly thanks to the
great performance quality of the “solution”.
Ultrasone 650 Pro headphone
Another test with a set of 650 Pro
headphone carries on with Denon DCD 3300 CD player, together with Rogue Audio
Cronus Magnum amplifier, DCD 3300 and Technics SU-V100D transistor amplifier.
In the option of listening directly with CD player, sound quality is in the
same level with that on Dell Vostro 1310 laptop playing CD through headphone amplifier
and it means that it is one level greater than listening to a CD directly on a
In accompany with Technics SU-V100D
transistor amplifier, the quality performance is increased another level
greater, mainly thanks to the more ponderous, vast and lifelike tone with much
higher definition. With Magnum tube amplifier, the ponderous sound is added
with delicacy; therefore, we can draw a conclusion that using Pro 650 headphone
with dedicated CD player and tube amplifier is the best option. Sound performance
is the same in comparison with pricey box speakers or pole speakers
(approximately thousands of USD) which is added with far more expensive set.
Ultrasone 650 Pro headphone
Natural surround S-Logic technology
Frequency range: 10Hz – 25.000Hz
Impedance: 75 Ohm
Sound pressure level: 95 dB
Metal shield (ULE technology)
Headphone cups: 40mm, gilded and radiation
Weight: 295g (exclude cables)
High sound definition
Have to use in air-conditioned rooms
because it is a full-sized headphone.