The most acurate
headphones ever created. That was the goal.
When Infinity's
scientists set out to develop such a stereo component, we determined to start
from the highest achievement to date in headphone reproduction - electrostatics
- and to remove the previous limitations of electrostatics.
The ES-1 Headphone
System demonstrates that accomplishment. And no longer are the finest
headphones any less accurate than the finest speakers.
An altogether new
diaphragm material is employed in these headphones because it follows dynamic
changes much faster and more precisely than the polyester others use. This
extremely low-mass material, called Polyurethin, is so responsive as to provide
a transient fullness impossible to achieve in the past.
as a result, Infinity's electrostatic
headphones deliver a frequency response of 20 to 25,000 Hz ±2 dB; at a sound
pressure level of 100 dB; they show total harmonic distortion of less than
0,3%; their maximum output is a full 118 dB SPL; the realism of their
reproduction is startling.
The ES-1 Headphone
System consists of one headphone set and the walnut-enclosed adaptor containing
power supply and matching transformers. Front-panel output connectors
accommodate two headsets; an optional second set is available from your
Infinity dealer.
The power supply is
to be connected between your amplifier and speakers. Front panel switchingwill
let you leave your headphones connected whether you are listening to them or to
your speakers. Power supply is also provided with a fast-acting protection circuit
to switch off either channel or both in case of overloading that might
otherwise damage the unit. A re-set button on the front panel easily puts the
circuit back into operation.
Infinity
Electrostatic Headphones operate in the push-pull mode, that is, the power
amplifier's signal is boosted by the transformer, and constant bias (DC)
voltage sets up electrostatic fields which push and pull the diaphragm between
two grids.
Infinity coats the
Polyurethin of the diaphragms precisely evenly with conductive chemical
compounds. The material and the process deliver three benefits:
A high "ratio
of extension", the ability to respond to the smallest signal variations
and return instantaneously to original tension. Infinity has achieved a marked
improvement over polyester, which is 20 times heavier than Polyurethin.
Reduction virtually
to zero of the distortion that can be caused when energy is reflected at the
suspended edge of a headphone diaphragm.
Voltage spread
evenly over the entire diaphragm surface so it will move as a perfect piston
with no "hot spots" moving sooner or more than other portions.
As with every
Infinity product, the purpose and the result of our using the most advanced
technology is to deliver the original, uncolored sound of music exactly as
recorded. In the case of the ES-1, you experience a spacious, open quality. Not
only can you hear sounds around you (baby's cry, doorbell), but in addition,
the music seems to be spread naturally all around you, and not focused
unnaturally inside your head.
Your private
listening experience with Infinity Electrostatic Headphones will be
gratifyingly comfortable, supremely accurate, and totally musical.
Specifications
Frequency
Response: 20 Hz to 25,000 Hz ±2 dB
Total Harmonic
Distortion: less than 0,3% at 100 dB SPL
Sensitivity: 98 dB SPL at input of 2 volts at 1000 Hz
Maximum Output: 118 dB SPL
Maximum Input: 50 watts at 100 Hz
Source Impedance: 4 to 16 Ω
External Power
Requirements: 117 or 220 volts AC 50/60
cycles, ,01 watts
Headphone
Weight: 9 ounces
Headband
Adjustment: 11-1/2 to 13-1/2 inches
Headphone Cord
Length: 98 inches
Adaptor Size (W x H
x D): 5-1/4" x 3" x
7-1/4"
Adaptor Input
Cord: 33-1/2 inches
Adaptor AC
Cord: 67 inches
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