Violectric HPA V90, User Manual

Page: 11 / 24

11
THE INPUTS
For the use with unbalanced signals, gold plated cinch sockets are
provided. They are labelled as "LEFT IN" and "RIGHT IN".
Input impedance is is 10 kohms.
Maximum input level should not 21 dBu.
This value is reduced to +15/+9 dBu if PRE-GAIN is set to +6/+12 dB !!
THE ACTIVE FEED-THROU
Your HPA V90 offers the opportunity of having dedicated outputs for the
refreshed input signals which can so be used for further purposes.
The gold plated cinch outputs are marked as "LEFT OUT" and "RIGHT
OUT".
Output levels equal the levels applied to the inputs, i.e. the signal is
amplified by 0dB (unity gain) at an output impedance of < 30 ohms.
Too loud ? Too soft ? The PRE-GAIN method
The V90 is specially designed to drive headphones. Headphones
however can present load impedances from 8 to 2000 ohms and
efficiency ratios from 85 to 115dB per milliwatt. Thus it can be quite
tricky to fulfil all demands, since...