RKV – MARK II
RKV – MARK II
_________________________dynamic headphone amplifier____________
_________________________dynamic headphone amplifier____________
6. Operating instructions
The frontside of the RKV has a number of controls, whose functions need some explanation.
At the left you find two 6.3 mm headphone jacks. Internally these jacks are connected in parallel.
Both can be used to connect headphones with an load impedance of 100 - 2000 Ohm. Please do
not connect devices with a lower impedance, the output of the amplifier is "shortened " and the
life time of the tubes is reduced drastically. You may also connect an impedanzer to one of the
headphone jacks which allows you to use low impedance headphones. Please do not connect an
additional headphone in case the impedanzer is used. It might be forgotten and be loaded with an
uncontrolled high output level. This could damage the heaphone.
Please connect your headphone to the jacks at low sound levels only.
At the middle of the front you find the ALPS potentiometer to control volume. It has a 51 kOhm
impedance which is at the same time the input impedance of the amplifier. The potentiometer has
a logarithmic scale.
The RKV is capable of extremely high sound levels. This has the danger of severe hearing
damage.
While listening to headphones we lack several feedback mechanisms on volume level that are
present when we listen to loudspeakers. Much less distortion, no feeling of the lower frequencies
by our body and no psychological restraints not to annoy our fellow-men easily seduces us to
listen at volume levels that are detrimental to our hearing. Hearing damage from regular
exposure to high sound levels progresses slowly but is irreversible and can result in permanent
hearing loss.
!! Please choose your volume setting with caution !!
At the right side of the front the power switch and the power indication LED are found. The blue
LED is lid with the power ON and mutes as soon as you switch the amplifier OFF.
Summary of Contents for RKV - Mark II
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