Expert Service 1-877-289-7664 [Hours]

2nd Annual Warehouse Sale!

Klipsch Reference Headphones + Headphone Amplifier Bundle

Klipsch Reference S4 In- Ear Headphones + FiiO E6 Portable Headphone Amplifier

We apologize

This item has been discontinued

Klipsch Reference S4

Reference Series In-Ear Headphones with Noise-Isolation and Built-In Strain Relief (101370)
Quantity: 1

Product Features:
  • Klipsch In-Ear Reference S4 Series Headphones with Noise Isolation
  • Dual-Magnet micro-speakers
  • Realistic sound through the use of a single, moving coil driver
  • Wide frequency range with dynamic detail
  • Exclusive soft and flexible oval earphone to nestle well within the ear canal
  • Superior noise-isolating design
  • Delivers smooth sound with great bass
  • Durable, tangle resistant cables to avoid unwanted tangling
  • Built-in strain relief for unbeatable comfort
  • Angled nozzle for proper in-ear alignment
  • Great for long-term wear
  • Four different sizes of washable ear tips are included to match the size of your ear canal
  • Authorized Internet Dealer
  • 2-year Manufacturer's warranty
Product Specifications:
  • Driver Type: Dynamic Moving Coil Micro Driver
  • Connector Type: 1/8" Standard mini plug (gold over brass)
  • Headphone Type: In ear
  • Frequency Range: 10-19,000 Hz
  • Drive Components: Full range KG 25
  • Cord Length: 4-1/4"
  • Sensitivity: 110dB
  • Impedance: 18 ohm
  • Isolation: -16dB
  • Weight: 11.9 grams
  • Color: Black with Copper accents.
  • Also found as: ReferenceS4, 1013730, Reference S4 Black
Package Includes:
  • 4 sets of ear tips (small, medium, small/medium and large)
  • Ear tip cleaning tool
  • Carrying Case
  • Owner's manual

FiiO E6 Portable Headphone Amplifier

Single Input and Output 1/8" (3.5mm) Interface and USB Rechargeable Battery
Quantity: 1

Product Features:

  • Portable Headphone Amplifier Perfect for iPod & MP3 Players
  • Lithium ion battery rechargeable via Mini USB
  • 1/8" (3.5mm)output and input interface
  • Volume button allows increase and decrease
  • Convenient clip increases portability
  • Individual power switch
  • Selectable bass boost modes
  • Indicator light indicates operating status
  • Similar amp is available in alternate design as FiiO E5
Technical Specifications
  • Frequency Response: 10Hz - 100000Hz
  • Output Power:
    • 150 mW with 16 Ohms headphones
    • 16 mW with 300 Ohms headphones
  • Signal to Noise Ratio: 95dB
  • THD: <0.009%
  • Rechargeable lithium ion battery
  • Suitable Headphone Impedance: 16 Ohms - 300 Ohms
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating


Product Summary


Model Number

Reference S4_E6



Internal SKU


Internal Product ID


Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Klipsch Reference Headphones + Headphone Amplifier Bundle