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UNiKA
User Manual
PRODUCT OVERVIEW
The RHA1 is a reference-grade headphone amplifier carefully developed by UNiKA
and manufactured in the UNiKA factory in Taiwan. The application object of RHA1 is
headphone enthusiasts, audiophiles and professional recording engineers and live
concert soundman.
Especially using only 24V external power supply and classic OTL amplifier circuit
design, its performance is amazing.
RHA1 is suitable for general consumer headphones, as well as reference-grade and
low-sensitivity high-end headphones. Impedances from 15ohm to 600ohm are easily
driven and produce a very smooth and very dynamic sound. Moreover, it performs very
high S/N ratio and cannot be perceivedpower supply and circuit characteristic noise.
It can be seen from the test chart (please scan the QR code on the last page to
download), we can see that the frequency response of the RHA1 is very flat from 20Hz
to 80KHz, and the full-band frequency response error value is not greater than ±0.2dB
in the test from low impedance to high impedance.
The most special feature is its specially designed ±18dB linear gain and post-amp
level control with maximum 0dB output. This design is like using a professional mixing
console. Users can first use its linear gain to adjust to the optimal input level and
dynamics according to headphones or signal sources with different characteristics
or impedance and sensitivity, and then use the output level control to determine the
volume you need to listen.
This design greatly exceeds some products currently on the market with fixed gain
value switches.
The components selected by RHA1 are all top-level models, and a double-connected
stereo potentiometer with very low L/R output different is specially customized to
ensure listening consistency.
The amplification of the output stage adopts the independent amplification of the L/R
channel, which greatly improves the separation and minimizes the crosstalk.
The input jacks are a pair of NEUTRIK® Combijack. It can be availableto connect
XLR and TRS balanced plug or TS unbalanced plug from recording devices or Hi-Fi
equipment.
At the same time, UNiKA is very considerately equipped with an external power supply
of adaptiveUniversal Input Range 90~264VAC and comes with 4 kinds of AC plugs that
can be interchangeable by user, including US, UK, AU and EU types.
Summary of Contents for REFERENCE RHA1
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