Knowles EF-28378-000
Manufacturer No:
EF-28378-000
Manufacturer:
Knowles
Description:
SPEAKR 1.275 KOHM TOP PORT 122DB
Quantity:
In Stock :5848
Looking for price or availability? Send us an RFQ and our sales team will respond quickly.
Shipping & Availability
Fast worldwide shipping via DHL, FedEx, UPS, and EMS.
Shipped from：HK Warehouse
Expected Shipping：Tue, Jun 30 - Wed, Jul 1, 2026
Lead Time：Inquire about availability
Date Code：Within 2 Years
Payment
We support multiple secure payment methods including PayPal, Visa, MasterCard, and American Express. All transactions are protected with advanced encryption to ensure secure and reliable payments.
Authenticity Guarantee
All components supplied by Aichiplink are sourced from trusted global suppliers and verified through strict in-house inspection and quality control procedures.
Quality Assurance
Certified in-house inspection and testing facilities ensure all components meet internationally recognized quality standards.
User Guide
Available from AS9120 Certified Supplier, AIChipLink delivers high-reliability electronic components supported by certified quality management, rigorous inspection processes, counterfeit mitigation controls, and full traceability systems. Our operations comply with AS9120, ISO 9001:2015, and IECQ ESD standards to support aerospace, industrial, defense, and mission-critical applications.
PURCHASE
Please verify all part numbers, quantities, and packaging preferences before placing your order. If substitutions are acceptable, please indicate this clearly. For time-sensitive projects, confirm estimated delivery dates and stock availability in advance. Once submitted, changes or cancellations may not be possible, especially for items marked as non-cancellable/non-returnable (NCNR). For international shipments, please ensure all import documentation is complete and accurate to avoid delays.
MEANS OF PAYMENTFor your convenience, we accept multiple payment methods in USD, including PayPal, Credit Card, and Wire Transfer. Net terms may be available for qualified customers upon approval.
RFQ (REQUEST FOR QUOTATIONS)Please ensure the part numbers and quantities are accurate and complete when submitting your RFQ.
Provide target prices and acceptable alternatives, if any, to speed up the quotation process.
Quotations are subject to stock availability and may vary with market conditions. Prices and lead times are not guaranteed until a purchase order is confirmed. Ensure your contact details are correct to avoid delays in response.
Step1：Prepare product
Step2：Desiccant Protection
Step3：Vacuum Packaging
Step4：Individual Package
Step5：Anti-collision Filling
Step6：Packaging Box
SHIPPING COST
1. Shipping starts at $40, but some countries will exceed $40. For example (South Africa, Brazil, India, Pakistan, Israel, etc.).
2. Some specific products need to reach the minimum order quantity.
3. It may cost additional remote fees for delivery if you are in a remote area.
Currently, our products are shipped through DHL, FedEx, SF, and UPS.
DELIVERY TIME1. Once the goods are shipped, estimated delivery time depends on the shipping methods you chose: FedEx International, 5-7 business days.
2. For in-stock parts, orders normally could be shipped out within 1-2days.
EF-28378-000 Information
Knowles EF-28378-000 technical specifications, attributes, parameters and parts with similar specifications to Knowles EF-28378-000.
- Type
- Parameter
- Mfr
- Knowles
- Series
- EF
- Package
- Bulk
- Product Status
- Active
- Technology
- Magnetic
- Type
- Receiver
- Frequency Range
- 200 Hz ~ 6.3 kHz
- Impedance
- 1.275 kOhms
- Efficiency - dBA
- 122.00
- Efficiency - Type
- Sensitivity
- Type
- Parameter
- Port Location
- Top
- Shape
- Rectangular
- Termination
- Solder Pads
- Size / Dimension
- 0.310" L x 0.220" W (7.87mm x 5.59mm)
- Height - Seated (Max)
- 0.310" (7.87mm)
Download datasheets and manufacturer documentation for Knowles EF-28378-000.
Datasheets:
No product details available
EF-28378-000 FAQ
Can I request a quote for EF-28378-000?
EF-28378-000 from Knowles is ready for RFQ submission. Send your target quantity and requirements, and AIChipLink will check current availability, lead time, and quantity-based pricing.
Why is pricing not shown as a fixed value for EF-28378-000?
The final price for EF-28378-000 depends on requested quantity, supply conditions, date code, package option, and destination. An RFQ lets us return the current market quote for your order.
Which specifications should I review for EF-28378-000?
EF-28378-000 is a Knowles Speakers part. Key details include Height - Seated (Max): 0.310" (7.87mm) and Efficiency - Type: Sensitivity; contact us if you need the specifications verified before sourcing.
When will I receive a quotation for EF-28378-000?
After you submit the RFQ for EF-28378-000, our sales team typically replies within 24 hours with availability, unit pricing, lead time, shipping choices, and possible substitutes.
What is the expected shipping time for EF-28378-000?
Once stock for EF-28378-000 is confirmed, available inventory can generally ship within 1–2 business days. The final schedule depends on quantity, warehouse source, and delivery address.
Can AIChipLink help find alternatives to EF-28378-000?
Yes. If EF-28378-000 is unavailable, end-of-life, or outside your schedule, we can review comparable Knowles Speakers parts and compatible replacement options.
AIChipLink – Your Trusted Electronic Components Distributor
12.28 M
Listed Part Number
3,000+
Leading Manufacturers
4.9 M
In-stock SKU
15,000+
Warehouse Area(㎡)
