Digi-Key’s library of more than 2000 exclusive PTM Online… On Demand® product training modules is a collection of training tools created with you – the busy design engineer – in mind. They are provided with the cooperation of participating supplier partners. From this one source, you can learn about the latest products and technologies, download datasheets, check inventory, contact our technical staff, and place an order for same-day shipment.

These modules are available in audio and non-audio formats and listed by supplier in easy-to-find alphabetical order. Simply locate the module that interests you and click on your format of choice. We hope you find these tools useful, and with new modules added continuously, we invite you to stop back often to see what’s new.


Product Training Modules Online...On Demand® is a registered trademark of Digi-Key Corporation.


Knowles / Designing Balanced Armature Earphones

This presentation will discuss how to choose a balanced armature drivers, the construction of an balanced armature earphone, and the part number to build a balanced earphone.

View Product Training Module   
Audio (3MB)       Non-Audio (1.5MB)


Related Parts

ImageDigi-Key Part NumberManufacturer Part NumberDescriptionQuantity AvailableMinimum QuantityUnit Price
BF-1861-000423-1158-NDBF-1861-000ACOUSTIC DAMPER 1500 OHMS90811.98000
BF-1860-000423-1183-NDBF-1860-000ACOUSTIC DAMPER BROWN 1000OHMS32611.98000
BF-1921-000423-1184-NDBF-1921-000ACOUSTIC DAMPER RED 2200OHMS50111.98000
BF-1922-000423-1185-NDBF-1922-000ACOUSTIC DAMPER ORANGE 3300OHMS211.98000
BF-1923-000423-1186-NDBF-1923-000ACOUSTIC DAMPER YELLOW 4700OHMS811.98000
BF-1999-000423-1187-NDBF-1999-000ACOUSTIC DAMPER GREY 3300OHMS40711.98000
CI-22955423-1057-NDCI-22955-000SPEAKER BALANCE WIDE BAND85125.34000
BK-26824-000423-1101-NDBK-26824-000SPEAKER Z=29OHMS SS PORT ON END0115.31000
CI-22960-000423-1104-NDCI-22960-000SPEAKER Z=400 OHMS PORT ON END144121.96000
DTEC-30008-000423-1144-NDDTEC-30008-000SPEAKER DUAL TWIN THIN20125.03000
WBFK-30019-000423-1145-NDWBFK-30019-000SPEAKER WIDE BAND FK SERIES13117.81000
WBFK-30095-000423-1146-NDWBFK-30095-000SPEAKER WIDE BAND FK SERIES215117.81000
GQ-30783-000423-1147-NDGQ-30783-000SPEAKER DUAL MINI WOOFER/TWEETER31138.66000
GQ-30710-000423-1148-NDGQ-30710-000SPEAKER DUAL MINI WOOFER/TWEETER47138.66000
TWFK-30017-000423-1152-NDTWFK-30017-000DUAL ARMTR SPKR 95DB 5X2.73X3.8643146.86000
GK-31732-000423-1188-NDGK-31732-000SPEAKER0153.63000
HE-31751-000423-1189-NDHE-31751-000SPEAKER0142.23000
SR-31843-000423-1193-NDSR-31843-000MINI SIRENS RECEIVER11816.27000
RAB-32063-000423-1194-NDRAB-32063-000SPEAKER 46.3 OHM 103.5DB37112.47000
DWFK-31785-000423-1195-NDDWFK-31785-000DUAL TWEETER RECEIVER21146.86000
ED-31305-163-NDED-31305-163SPEAKER02519.52800

To view modules, you will need Adobe Flash Player 9, or greater, installed on your computer. Adobe Flash Player is available FREE from Adobe.

Flash Player  |  Flash Player Support Center