HPA4XD Twins, Two HPAX's in one housing!
HPA4XD- has 2 x double mono, super linear, 4 x 1.3 Watt, very fast,
high definition, low distortion, super linear amplifiers. They have very
low noise below -96 dBV and studio level 24 bit 128 k-Hertz high quality
sound. each channel drives perfectly impedances between 8 and 600 Ohms.
Output impedance is close to 0 Ohm.
HPA4XD- This is a special device that can be customised to the
customer's wishes. Order the HPA4XD with black top and bottom or the
HPA4SD with silver top and bottom. These Twin headphone amplifiers,
in one housing, are for the plug in of two seperate headphones, each
being driven with seperate HPA4 amplifiers for the best possible sound.
Two headphones with wide differences in impedance and sensitivity can
then be connected without lowering the sound quality. The -XD or -SD
can be delivered with two one-knob stereo controls or with four one-knobs
mono (balancing) controls on the front. The back can also be customised
with only one AC power connector for both amplifiers, or with one for
each amplifier. RCA signal input jacks can be seperated, one stereo
pair for each amplifier or just one pair connected internally to both
amplifiers. With the seperated inputs, two separate sources can be
listened to, to compare sources. With the connected inputs, one source
can be listened to, to compare headphones and/or two people can listen
at different volume levels to the same source. The LED's on the front
can be ordered in green or in blue. When ordering, please tell us how
we should build it to exactly your wishes! Headphone retailers should
use this amp to give customers the chance to compare headphones honestly!
Hanging 10-20 different headphones on one power amp in a store shows
only the owners and the buyers ignorance of basic hifi rules. Setting
each headphone to the same listening volume gives then an 'honest'