Beyerdynamic
AX Audio Essentials Bundle - DT 990 PRO 250 Ohm + FiiO K11
Pair beyerdynamic DT 990 PRO 250 Ohm open-back headphones with a black FiiO K11 desktop DAC and headphone amplifier. Connect the headphones through the K11's 6.35 mm output using their supplied adapter.
BUNDLE
What's included
Overview
AX AUDIO ESSENTIALS AUDIO BUNDLE
AX Audio Essentials: open-back listening with a desktop DAC.
AX Audio Essentials pairs the beyerdynamic DT 990 PRO 250 Ohm headphones with a black standard FiiO K11 DAC and headphone amplifier. The open-back headphones provide a dedicated listening setup, while the K11 brings USB, optical and coaxial digital inputs to your desk. One amplifier and one pair of headphones are included in this fixed configuration.
250 Ohm
DT 990 PRO impedance
Open-back
Headphone design
6.35 mm
Headphone connection used
3
K11 digital input types
What is included in AX Audio Essentials?
The AX Audio Essentials bundle includes 2 main products, with one of each supplied in the finishes shown below. Product accessories and the full connection guide are listed further down.
INCLUDED COMPONENT 1 · QUANTITY 1
beyerdynamic DT 990 PRO 250 Ohm open-back headphones
The DT 990 PRO provides the listening side of this bundle: an open-back studio headphone for checking a mix, editing audio and enjoying a spacious stereo presentation at your desk. This is the 250 Ohm version with a permanently attached coiled cable.
- Open-back acoustics: The vented earcups let sound pass in both directions. They suit a quiet room and allow awareness of the surroundings; they do not isolate outside noise or prevent headphone audio from leaking into a nearby microphone.
- 250 Ohm dynamic drivers: The published frequency response is 5–35,000 Hz and nominal sound pressure level is 96 dB. Use the bundle's dedicated headphone amplifier and choose gain for the actual headphone connection.
- Comfort for desk sessions: The over-ear fit combines soft velour cushions with an adjustable padded headband. Replaceable ear pads and headband padding make routine wear items serviceable.
- Fixed 3 m coiled cable: The cable terminates in a 3.5 mm stereo plug and includes a screw-on 6.35 mm adapter. Use the connector size required by the amplifier; this stock cable is a single-ended connection.
- Exact model and construction: The DT 990 PRO is made in Germany and has a black frame with grey velour pads. It has no built-in microphone, wireless connection or detachable mini-XLR cable; those connection details differ from the DT 990 PRO X.
In AX Audio Essentials, the DT 990 PRO supplies the listening output. Fit its supplied 6.35 mm adapter and connect it to the K11's single-ended headphone socket.
View the beyerdynamic DT 990 PRO 250 Ohm open-back headphones product details.
INCLUDED COMPONENT 2 · QUANTITY 1
FiiO K11 desktop DAC and headphone amplifier — Black
The black K11 brings digital source selection, headphone amplification and front-panel volume control into one desktop unit. The included model is the standard CS43198 DAC version, with two SGM8262-2 amplifier chips.
- Three digital input types: Connect a computer through the USB-C data port or use an optical or coaxial source. USB supports PCM up to 32-bit / 384 kHz and native DSD256; coaxial input supports up to 24-bit / 192 kHz and optical input up to 24-bit / 96 kHz.
- Headphone and speaker connections: The front panel has 6.35 mm single-ended and 4.4 mm balanced outputs. Rear RCA outputs provide a line-level connection for compatible powered speakers or a separate amplifier; those products and their connecting cables are not included.
- Gain and everyday control: Low, medium and high gain settings help match the listening level to the headphones. The encoder handles volume and menu settings, while the display shows the selected configuration.
- Power for the included connection: FiiO specifies at least 60 mW per channel into 300 Ohm for the single-ended output in high gain, with THD+N below 1%. Its 1,400 mW balanced rating at 32 Ohm does not describe the output delivered to the supplied DT 990 PRO cable.
- Desktop power supply: The K11 uses an external 12 V / 2 A DC supply and has no battery. USB-C carries data rather than serving as the unit's DC power input. The chassis measures approximately 147 × 133 × 32.3 mm including its feet and weighs about 407 g.
- Additional digital output: The shared coaxial socket can act as a digital output in USB mode, useful when connecting the computer to another compatible digital audio device.
The black K11 converts the selected digital source and drives the supplied headphones through its 6.35 mm output. FiiO's recommended single-ended headphone range is 8–150 Ohm, so the 250 Ohm DT 990 PRO sits above that range even though FiiO also publishes a 300 Ohm output-power figure. Available volume and headroom depend on the source and gain setting.
View the FiiO K11 desktop DAC and headphone amplifier — Black product details.
Connect the DT 990 PRO to the black FiiO K11
- Connect the K11's supplied DC power adapter. Connect the computer to its USB-C data input with a suitable data cable, or connect a compatible optical or coaxial source using the appropriate separately purchased cable.
- Select the matching input on the K11. For USB playback, choose the K11 as the output device in the operating system and player; high-resolution formats also depend on the player and driver configuration.
- Fit the DT 990 PRO's 6.35 mm adapter and plug it into the K11's 6.35 mm single-ended output. The stock cable does not use the 4.4 mm balanced socket.
- Begin with low volume, then choose a gain setting and listening level appropriate to the recording. The 250 Ohm pairing is above FiiO's recommended single-ended load range; do not use the balanced output's power rating to judge this connection.
This two-component bundle is for headphone listening and editing. A computer or other audio source is required. A microphone, speakers and boom arm are separate purchases; RCA speaker connections need suitable equipment and cables.
In the box
- 1 × beyerdynamic DT 990 PRO 250 Ohm headphones, with fixed 3 m coiled cable and 6.35 mm adapter.
- 1 × FiiO K11 in black, with power adapter, power cable, USB cable and headphone jack adapter supplied by FiiO.
Complete Your Audio Setup
Browse more audio bundles and FiiO products. Optional additions for your desk include RØDE PodMic USB Dynamic Microphone – USB-C & XLR – Black / White, RØDE PSA1+ Professional Studio Microphone Boom Arm, Elgato Stream Deck MK.2, 15-Key Customizable Controller, Elgato Facecam MK.2 1080p Premium Webcam. These products are sold separately.
Frequently Asked Questions
What is included in AX Audio Essentials?
One pair of beyerdynamic DT 990 PRO 250 Ohm headphones and one black standard FiiO K11 DAC/headphone amplifier. A microphone and computer are not included.
Which K11 socket should I use for the DT 990 PRO?
Use the 6.35 mm single-ended output with the headphones' supplied adapter. The stock headphones are not connected to the K11's 4.4 mm balanced output.
What should I know about the 250 Ohm pairing?
FiiO lists a recommended single-ended load range of 8–150 Ohm and also publishes output power at 300 Ohm. These 250 Ohm headphones are above that recommended range. Available volume and headroom depend on the source and gain setting; the balanced-output rating does not apply to this connection.
Are these headphones suitable for isolating outside noise?
They have an open-back design, so they allow sound to pass through the earcups. Choose a quiet environment for listening, and consider a closed-back model if acoustic isolation is your priority.
Which headphone model and K11 finish are included?
The headphones are the DT 990 PRO 250 Ohm, and the included K11 is black. Both models and the amplifier finish are fixed.
Can I add powered speakers later?
The K11 has RCA line outputs for compatible powered speakers or an amplifier. Speakers and RCA cables are sold separately; select the intended output mode on the K11.
Build Your Setup with AX Store Kuwait
Need help choosing the right model or a compatible accessory? Contact AX Store and our team will help you build the right setup.
THE DETAILS
Technical specifications
Bundle contents
1 included
1 included
DT 990 PRO 250 Ohm with black K11.
beyerdynamic DT 990 PRO 250 Ohm — Product
beyerdynamic
DT 990 PRO
Critical listening and precise editing
Dynamic transducers
Germany
beyerdynamic DT 990 PRO 250 Ohm — Technical Data
Open
Wired
Firm fit for professional use, approx. 3.5 - 5.5 N
Without Remote
250 ohms
5 - 35,000 Hz
96 dB
Circumaural (around the ear)
Coiled connecting cable with mini-jack plug (3.5 mm) & ¼“ adapter (6.35 mm)
459038
4010118459030
FiiO K11 — Hardware and decoding
Standard K11; CS43198 DAC version
CS43198
Two SGM8262-2
SA9312L
MS8422N
PCM up to 32-bit / 384 kHz; native DSD256
Up to 24-bit / 192 kHz
Up to 24-bit / 96 kHz
FiiO K11 — Connections and controls
USB-C data input
Optical; coaxial
6.35 mm single-ended; 4.4 mm balanced
RCA line output; 1.95 Vrms
Shared coaxial socket; USB mode only
Low / Medium / High
Encoder knob for volume and menu selection
FiiO K11 — Performance and power
At least 520 mW per channel; THD+N below 1%
At least 1400 mW per channel; THD+N below 1%
At least 60 mW per channel; THD+N below 1%
At least 250 mW per channel; THD+N below 1%
8–150 ohms
8–350 ohms
At least 123 dB, A-weighted
DC 12 V / 2 A
None
147 x 133 x 32.3 mm, including feet
Approximately 407 g
COMPLETE YOUR SETUP
Pairs well with
