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T and H pad Calculator

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This JavaScript audio attenuator calculator will provide resistor values for unbalanced T-pads, and for balanced H-pads. Use the closest 1% tolerance resistors to the values shown. Attenuators beyond 40dB are not recommended. Type in the values for input impedance, output impedance and the desired attenuation then push the calculate button, and the results will show up in the tables below. Do not input data into the tables. If you get negative resistor values, you need a buffer amplifier between the two devices.


JavaScript Help

Input impedance
of attenuator

OHMS

Output impedance
of attenuator

OHMS

Attenuation required
in decibels (1-40):

dB



Scroll down to see results

T PAD RESISTOR VALUES - RESULTS


OHMS

OHMS
Input Impedance

OHMS





OHMS
Output Impedance

OHMS

H PAD RESISTOR VALUES - RESULTS


OHMS

OHMS
Input Impedance

OHMS





OHMS
Output Impedance

OHMS


OHMS


OHMS

This information is provided with no warranty of its accuracy, or applicability, and any use made of this information is done so at the sole risk of the user.

Download this calculator as a zip file. Save to your local drive and view in a Javascript capable browser.



Mc Squared System Design Group, Inc Mc Squared System Design Group, Inc

323 - 901 West 3rd Street, North Vancouver, BC. V7P 3P9   Ph 604-986-8181
403 - 1240 Kensington Rd NW, Calgary, AB. T2N 3P7   Ph 403-452-2263
901 King Street West, Suite 400, Toronto, ON. M5V 3H5  Ph 647 - 479 - 9601