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Final Audio Design Sonorous IV (FI-SO4BD)

Over-Ear Headphones w/ Dynamic and Balanced Armature Drivers

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Final Audio Design Sonorous IV (FI-SO4BD)

Over-Ear Headphones w/ Dynamic and Balanced Armature Drivers

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Final Audio Sonorous IV Dynamic & Balanced Armature Driver Headphones

The Final Audio Design Sonorous IV Headphones Offer an Incredible Listening Experience

With the synergistic effect of a hybrid design that merges balanced armature with a 50mm diameter dynamic driver unit coupled with BAM mechanism, we’ve achieved a clear, vast sound stage with depth to it. With these, the music that seemed to be localized inside our heads with existing headphones vibrates over a large space.

The Final Audio Design Sonorous IV Headphones Offer an Incredible Listening Experience
The Final Audio Design Sonorous IV Headphones Offer an Incredible Listening Experience



Clear Sound Quality and a Vast Sound Stage that has Depth

The Final Audio Sonorous IV uses two different types of drivers to give the listener unparalleled depth, vast sound stage and supreme clarity.

The FFinal Audio Design Sonorous IV Headphones Offer an Incredible Listening Experience

Balanced Armature Driver: A Balanced armature driver unit was developed by Final Audio for optimal use as a tweeter. Final Audio paid special attention to their choice of materials used in their pursuit of sound quality, utilizing a Permalloy with a high level of magnetic permeability in the magnetic circuit.

The FFinal Audio Design Sonorous IV Headphones Offer an Incredible Listening Experience

Newly Developed 50 mm Dynamic Driver: A driver unit with a diameter of 50 mm was newly designed for the SONOROUS. By increasing the precision of the parts, it has become possible to make the gap between the magnetic circuit, the pole piece and the yoke narrower than with common products. A powerful neodymium magnet is coupled with this, making for a high magnetic flux density. The result is clear sound quality.

The Final Audio Design Sonorous IV Headphones Offer an Incredible Listening Experience
The Final Audio Design Sonorous IV Headphones Offer an Incredible Listening Experience


General Features:

  • Wired Stereo Headphones
  • Over-ear design
  • Large 50 mm Dynamic speaker and Balanced Armature driver produce amazingly clear sound
  • BAM mechanism balances air pressure at the front and rear of the diaphragm
  • Adjustable headband for comfortable listening sessions
  • Designed with a snug fit for active people
  • Gold-plated, corrosion-resistant stereo jack
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Product Specifications:

  • Frequency Response: 30-25,000 Hz
  • Sensitivity: 105 dB
  • Nominal Impedance: 8 Ohms
  • Cord Length: 4 ft. (1.5 m)
  • Cable Type: Detachable
  • Plug Size: 1/8" (3.5mm)
  • Weight/Mass: 14.46 oz (410g)
  • Speaker Diameter: 2" (50mm)

Headphone Design

Headphone Type

This is the design of the earpieces on the headphones. Some headphones go inside the ear, while others rest on the outside of the ear. This helps you know exactly what type of headphones you will be receiving.

In-Ear: The ear buds go into the ear. Most often, the right and left ear buds are two separate pieces.

Enclosed-Ear: Usually are found on the larger headphones. They rest on top of the ear and have padding for comfort, as well as enclosing the ear to the speaker. This type of headphone helps to filter out surrounding noise.

On-Ear: This type of headphone involves the speaker sitting gently on the ear without going in the ear or sealing it off.

Enclosed-Ear
Headband Type

Headphone type refers to the construction of the headphones.

Around the Ear means that the headphones wrap around the ear to provide a secure fit. This is most often seen in active and sports headphones.

Around the Neck means that the headphones wrap around the neck. This is also seen in active and sports headphones.

Earbuds means that the right and left sides of the headphones are separated and will fit securely into the ear. These are small, compact, and user friendly.

Over the Head headphones mean that the right and left speakers are connected with a support that goes over the head and rests on top. This is the typical headphone type.

Over the Head
Headphone Application

This is the application that the headphones are designed for. Each application has unique features that make it perfect for particular uses.

DJ: These headphones are durable, loud, and will often allow for one ear listening.

Gaming Delivers explosive sound and allows you to communicate with others.

Home Hi-Fi: These audiophile headphones are engineered to produce high fidelity and accurate audio.

Home/Office: These headphones are designed to produce rich, brilliant sounds that the artists would appreciate.

Sports: Designed for active use. These headphones are made to stay in (or on) the ear during workouts.

Kids: Feature noise limiting technology so that your little ones don't damage their ears listening to music too loud.

On-the-Go: On-the-go headphones are lightweight and often fold up for easy storage and portability.

Student: Compact and rugged enough to survive life in a backpack; inexpensive enough to not hurt the wallet of a student.

Studio: Reproduce music perfectly without any coloration. Look here for reference quality studio monitoring headphones.

Traveler/Airplane: These headphones are compact, lightweight, and have a portable design.

Home/Office
Studio
Acoustic Principle

The basic design of the headphones. There are 3 different types:

Open: Have ports that allow air through the back of the diaphragms, enabling the headphones to sound like the music is coming from an outside source.

Closed: Completely sealed and have no air passing through the diaphragms. Sounds like you are in a closed off room.

Semi-open: Have slots or ports in the back of the cup and are partially open. This allows for a mixed sound between an open and closed headphone.

Closed

General Features

Noise-Canceling
Noise Reduction technology removes unwanted noise from a signal. Background or ambient noise can be removed to produce clearer speech and enhanced hearing. Typically these Active Noise Canceling (ANC) headphones are powered and use batteries to activate the noise canceling technology. Also referred to as Noise Reduction or Noise Cancellation.
No
Built-In Microphone
This means that the headphones or earbuds have a built-in microphone. This can be a microphone on the cord, built into the headphone, or even a boom microphone. These mics can be used for music devices like iPods, for Smartphones to make and receive calls, or for gaming purposes.
No
Equalizer/Tunable
This means the sound of these headphones can be customized to your listening preference through either an app or on-board controls.
No
Headphone Connection
This is how the headphones connect to the audio source.

Corded means that the headphones use a cord to transfer the audio signal.

Bluetooth means that the audio signal is transmitted from your device to the headphones via a Bluetooth connection.

Corded or Bluetooth means that the headphones can be used as corded headphones or as Bluetooth headphones. They have an input in one or both earcups for use as a corded headphone while they also have a built-in battery for use as Bluetooth wireless headphones.

Wireless means that the audio signal is transmitted wirelessly to the headphones.

Corded
Volume Adjustment
Volume Adjustment means that the headphone (independent of the source) can adjust the playback volume. Many headphones and ear buds have in-line volume control, which allows adjusting the audible volume from a switch on the headphones cord. Other headphones have a volume knob on the headphone can.
No
Connector Type
The type of connection the headphones use to connect to receive the audio signal from a music source. Traditional headphones use an analog 3.5mm headphone jack. Newer technology has allowed digital signals to be sent directly to the headphone using an Apple Lightning or USB-C cable.
Jack Size
Refers to whether the headphones use a 3.5mm or 1/4" headphone jack connection.
3.5mm
Jack Angle

The Jack Angle refers to the angle of the input jack on the headphone cable.


Straight Jack: Straight plug with no angle.


Angled Jack: Angled plug, usually a 90 degree angle.

Swivel Jack: A swivel jack is able to swivel between a straight plug and an angled plug.

Straight Jack
Detachable Cable
Refers to whether the cable can detach from the headphones. If a pair of headphones has a detachable cable, the cable can be replaced with a longer cable, one with (or without) a microphone or if you accidentally damage the cable.
Yes
Color Shades
Primary color shades of the headphones.
Black
Silver/Gray
Material
Refers to materials used to build the headphones. Most headphones are built from some combination of plastic and metal to give you a durable pair of headphones.
Metal
Plastic
Ear Cushion/Earbud Material
Refers to the material that the ear cushions/earbuds are made from. Ear cushions and earbuds are available in a variety of materials, ranging from basic rubber eartips to plush leather ear cushions intended for maximum comfort.
Leather
Replaceable Ear Cushions
Refers to whether the ear cushions can be removed and replaced. Often times on heavily used headphones, the ear pads can wear out long before the actual headphones. Headphones with replaceable earpads often last much longer than headphones without replaceable earpads.
Yes
Weight (oz.)
This is the weight of the unit in ounces.
14.46 oz.
Water Resistant
This refers to the level of water resistance of the fitness tracker. Some fitness trackers are water resistant and can be used while swimming, while others are only splash proof or should not be used near the water.
No
Child Safe
Refers to whether a pair of headphones are designed specifically for children. Child safe headphones feature volume limiting technology so that your child can’t damage their ears while listening to music.
No
Foldable
Refers to whether a pair of headphones can be folded up. These headphones feature hinges in the frame above the earcups that allow the headphones to neatly fold into a much more manageable size. Folding headphones are perfect for anyone who spends a lot of time traveling and needs a compact pair of headphones that can fit in their bags.
No
Ear Hooks
These headphones feature hooks that wrap around your ears for a secure fit.
No

Audio Features

Driver Type

The physical design of the driver in the headphones.

Balanced Armature:
A balanced armature driver uses a coil wrapped around an armature which is held in between two magnets until it is stimulated by an electrical current. When stimulated, this armature is magnetized which causes it to rotate one way or the other around a pivot point which moves the diaphragm to create sound. Balanced armature driver headphones are generally earbuds and can have multiple drivers in each earbud.

Dynamic:
Dynamic drivers are the most common driver type. They feature a permanent magnet, usually neodymium, a voice coil and a conical diaphragm to drive your music. A dynamic headphone driver looks pretty much identical to any typical home theater speaker.

Electrostatic:
Electrostatic drivers are made up of an extremely thin membrane, usually a coated PET film, stretched between two metal plates. An electrical signal is applied to the metal plates to create an electrical field which, depending on its polarity, draws the speaker diaphragm toward one of the plates which forces air through the perforations in the diaphragm which generates the sound wave.

Planar Magnetic:
A planar magnetic driver is made up of a large membrane suspended between two sets of oppositely aligned magnets. An electric charge is applied to the membrane to induce movement and produce sound waves.

Dynamic
Impedance
The opposition to electric current, a higher impedance means a higher electrical resistance. This is measured in ohms.
8 ohms
Sensitivity
An efficiency or sensitivity rating tells you how effectively a speaker converts power into sound. The higher the number, the more efficient the speaker and the louder it will play with the same input power. An efficient speaker helps you maximize your available power. Most sensitivity ratings measure the speaker's output with 1 watt of input, 1 meter from the speaker. Some speakers' sensitivity is measured with 2.83 volts of input, instead of 1 watt.
 
Efficiency (1w/1m) is not an accurate indicator of a subwoofer's output capability and should not be used as a comparison to other speakers or subwoofers to determine which one is "louder".
105 dB
Driver Size
This refers to the diameter of the driver (speaker) on each side of the headphone.
50 mm
Frequency Response
The range of frequencies the speaker will reproduce (lowest frequency to the highest). Bigger is better, meaning the wider the range, the better. The optimal range is 20 - 20,000 Hz (which is the range of human hearing).
30 - 25,000 Hz
Audiophile
Audiophile headphones represent some of the finest headphones available. Audiophile headphones produce genuinely outstanding sound quality as well as extraordinary build quality, components and comfort. They are truly the finest headphones available.
No
Built-in Amplifier
This refers to whether the headphones have an amplifier built-in.
Yes
Amplifier Recommended
This refers to whether a separate headphone amplifier is recommended for use with a specific pair of headphones. It is highly recommended that any headphone with an impedance greater than 100 ohms be amplified.
No
Pass Throughs
Refers to whether a pair of headphones has an output to connect to another pair of headphones.
No

What is in the Box?

Main Product
The main product in the box.
Final Audio Design Sonorous IV
Accessories
Accessories included with the headphones
Carrying Case
Paperwork
Paperwork included with the product.
User Guide
Warranty Card

Warranty and Return Policy

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

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
0%
4 Star
50%
3 Star
50%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
4.5
Value
4.0
Features
3.5
Design
4.0
Usability
3.5
Adonis

Venice, CA

Overall
Durability
Value
Features
Design
Usability
Two Snug Pillows over your ears that play music

August 23, 2016

These headphones are huge...it's the first thing you recognize, but it's for a reason(more on that later). The Sonorous IV are very simple headphones. The cups are fully functional in a way that is close to a 360 degree motion that seems to flow and maintain a snug fit with your head movements. The headphones are also surprisingly lightweight despite their actual size. And now, the music. As a traphead that appreciates a good thumping bass, these headphones do not deliver. However, if you enjoy anything other than trap and music with hard-hitting bass, then this is your stop. As I was saying earlier...the size. They're huge. For a reason. The huge headphone cups feel like soft pillows over your ears, that slide on smoothly and is snug and comfortable. In essence, these headphones transport you to whatever world you are hoping to go when you turn on your music.

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Mordecai

Wyoming

Overall
Durability
Value
Features
Design
Usability
HELLO HellO hello

June 27, 2016

Crazy how good the soundstage is for a closed back headphone. I read other reviews mentioning this and I can definitely say I agree. I love these headphones except on EDM and hiphop. I like the treble a lot with these as I can hear every detail in women's vocals (the breathing), cymbals in drumsets, and other high frequency sounds so easily at lower volumes. They highs are so sharp without being piercing or sibilant. I love music loud but with these I don't need to play them really loud to get the same enjoyment. If you like to blast music then these are not for you IMHO. Unfortunately they are not comfortable for me because my ears are pressed against the grill that covers the drivers in each cup. They should have had some that of padding over it. I've tried the Sonorous III which has a padding over the grill and it's more comfortable. I assume with these they don't as the padding will dampen the highs which make these special. My ears are medium sized and more outwards like Obama ears. Anyways, if you have small or really big ears then these are a for sure headphone if you want open back headphone sound from a closed back headphone and like analytical sound.

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Product Summary

Manufacturer

Model Number

Sonorous IV

UPC

811178025784

Weight

3.00lbs

Internal SKU

sonorousiv

Internal Product ID

99711

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: Final Audio Design Sonorous IV (FI-SO4BD)