Rack Mounting; Application; The Hpa6 As A Headphone Amplifier - Alto HPA6 User Manual

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4.3 Rack M ounting
The most secure mounting is on a universal rack shelf available from various rack manufactures or your
music dealer. The HPA6 6-Channel Headphone Amplifier fits into one standard 19" rack unit of space.
Please allow at least an additional 4" depth for the connectors on the rear panel. Be sure that there is
enough air space around the unit for sufficient ventilation and please do not place the HPA6 6-Channel
Headphone Amplifier on high temperature devices such as power amplifiers etc. to avoid overheating.

5.Application

This section presents some typical applications of our
Please reserve your time to well understand the control elements ( see Chapter 3 ) and the following
application examples, so as to be able to fully exploit the HPA6 6-Channel Headphone Amplifier.

5.1 The HPA6 as a Headphone Amplifier

This is the basic application for HPA6 6-Channel Headphone Amplifier. While using the HPA6 as a Hea-
dphone Amplifier, please apply the program source to Main / Direct In Inputs, and connect the headphone
cable to one of the appropriate outputs. Turn up the Input Gain and the Balanced controls to center
position. The Input Gain control is used to boost or attenuate the general volume of all the headphones,
while the individual Output Gain controls are used to set the desired channel volume.
Three headphones can be connected per channel each time, on condition that the resulting total conne-
ction impedance does not fall below 100 Ohms (Although the power amplifiers are resistant to temporary
short circuits, an impedance drop will not incur any damage, but, it can affect the quality of reproduction,
in terms of long term damage and distortion). If this is not enough, you can interlink any number of HPA6
via the Main Outputs.
The Headphone Out on the front panel is connected in parallel to the rear panel output connectors, and it
provides an additional option to monitor the individual channels. When this unit is permanently mounted
in the rack, this proves to be a useful function.
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LTO HPA6 6-Channel Headphone Amplifier.
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