Owner's Manual

H8 DSP

Digital Interface Processor

User’s manual

9. H8 DSP in Level inputs calibration.

This procedure is delicate and requires utmost accuracy. Improper execution may invalidate the final acoustic

results. The H8 DSP outputs must be disconnected from the amplifiers

• While playing track 1 of the CD, turn the first knob towards the highest sensitivity (position +).

• When the orange LED lights up or flashes, stop turning and go back slightly until the LED turns off

• It is normal for the LED to flash briefly; this indicate correct sensitivity calibration.

• Repeat the procedure for the other 3 Front / Rear knobs.

• Note the calibration level used by the head unit volume control.

Important: Some OEM head units require a low load impedance to enable the outputs (usually the Rear section).

If during the calibration process the input signal level can not be adjusted, it could be necessary to connect

in parallel a 47Ω - 3W resistor to the input cables of the channels showing the issue.

Select BACK to go back to the previous step.

Select NEXT to go ahead with the setup procedure.

Select CANCEL to exit the procedure

WARNING: OEM audio systems installed as standard by car manufacturers often provided with equalized outputs.

This means that the response curve is not flat and the difference between the highest and the lowest

level can reach 6 dB. By calibrating the device so that the LED never lights up, the H8 DSP sensitivity may

be suboptimal (low) and you may experience noise (whistle) on the speakers. A few quick LED flashes

indicate only a small distortion when handling maximum peaks (very occasional) of music tracks. If the

source is not equalized, response is flat and the LEDs will always be on or always off. In this case, calibrating

is easy because you will simply need to adjust the knobs so that the LEDs turn off just below the point

they turn on.

10. Integrated speakers selection

Speakers can be selected just by clicking on them.

If the left tweeter, left midrange or left woofer are selected, the software

provides the ability to automatically also activate the right tweeter, right

midrange or right woofer.

Once started, this choice sets the dedicated crossover type and frequencies

with default settings. If you do not use passive crossover filters, each

speaker corresponds to an output channel. The H8 DSP features 8 output

channels; without passive crossover filters 8 amplified channels can be

driven. Of course you can select more than 8 speakers, in which case the

system will help implement passive crossovers

Select BACK to go back to the previous step.

Select NEXT to go ahead with the setup procedure.

Select CANCEL to exit the procedure.