Key Features
- Total Frequency Response: 44 Hz → 24kHz
- Nominal Impedance: 4 ohms
- Max Sensitivity (1 watt @ 1 meter): 90 dB
- 6.5" Mid/Woofer Driver
Demand Series High-Performance Bookshelf Speakers
- 1” Aluminum Dome Tweeter with 20/20 Wave Alignment Lens™ and Laterally Offset Tweeter Assembly
- BDSS™ (Balanced Double Surround System) Midrange/woofer
- Linear Response Waveguide™
- Integrated passive bass radiator in each speaker produces superior low-end extension

Demand D11
Definitive Technology Demand D11 high-performance bookshelf speakers deliver full-range, room-filling sound and precise imaging in a modern, elegant styling. Featuring technology advancements to both our aluminum dome tweeter and midrange/woofer sections, each speaker delivers an unrivaled sweet spot, smoother high-frequency reproduction, and three-dimensional imaging for the most technically-advanced, premium bookshelf listening experience.
Cyrus OneHD Amplifier
Overview
- 100W/ch Integrated Amplifier
- Optical / USB / Digitial Input DAC
- Subwoofer Pre-out Connection
- Mobile App For Remote Control
- Made In The UK

“Connect your Cyrus ONE HD with your laptop or PC via USB. The performance of high-res audio files played from streaming services such as TIDAL or Qobuz is simply jaw-dropping.”
ONE HD FEATURES
Bluetooth Enabled – aptX®HD:
aptX® HD compatible Bluetooth enables you to stream better than CD quality music from your phone/tablet or computer via a wireless Bluetooth connection, providing maximum flexibility without the need for a home network or any complicated set up. This allows everyone in the family to enjoy their music from their portable devices quickly and easily.
High-power Amplifier:
2 x 100W gives class-leading power output that will drive most loudspeakers regardless of their size. All that power enables Cyrus ONE HD to present your music with a huge dynamic range, giving 3D detail and bags of energy without the need to buy big, bulky, inefficient amplifier boxes.
MM Phono Stage:
Cyrus ONE HD features a built-in phono stage that is compatible with all Moving Magnet cartridges and requires no adjustment or extra set up, enabling you to play all your favourite vinyl from most turntables.
Digital and analogue inputs:
Asynchronous USB, optical and SPDIF inputs enable you to connect your PC, TV, Games Console, CD player, indeed virtually any source, directly to the Cyrus ONE HD. Four analogue inputs include RCA terminals for a turntable and an AV input that can be set to fixed gain in order to integrate with a separate AV amplifier.
Class AB Headphone Amplifier:
Uniquely, when headphones are connected, the large toroidal transformer is switched to power just the headphone section. These huge reserves of power result in a high power, high voltage class AB headphone amplifier that will drive almost all headphones with ease. The resulting musical performance is on a par with most standalone headphone amplifiers
Speaker Impedance Adjustment:
SID – Speaker Impedance Detection automatically matches the amplifier’s output response to the electrical load of the loudspeakers. This means that matching Cyrus ONE HD to any brand of loudspeaker has suddenly been made so much easier.
Specifications
Demand D11 Specifications
AUDIO QUALITY
-
- Total Frequency Response
- 44 Hz → 24,000 Hz
-
- Nominal Impedance
- 4 ohms
-
- Sensitivity (1 watt @ 1 meter)
- 90 dB
-
- Lower and Upper -3dB Limits
- 61 Hz → 22,000 Hz
INPUTS
-
- Audio Inputs
-
-
- Speaker Inputs
- (1) (Set) 5-Way Binding Posts - Gold Plated
ON-STAND MOUNT
-
- Mounting Type
- 1/4 in - 20 Threaded Insert
-
- Available Orientations
- Vertical
-
- Mounting Location
- Bottom of Speakers
ON-SHELF MOUNT
-
- Mounting Type
-
- Available Orientations
- Vertical
EXTERNAL AMPLIFIER
-
- Recommended Amplifier Power Per Channel
- 20 watts → 200 watts
CROSSOVER
-
- A/V Receiver Crossover Settings
- Small (60 Hz)
High-Performance Bookshelf Speaker
-
- Qty Included
- Pair
-
- Orientation
- Vertical
-
- Height
- 13" (33.02 cm)
-
- Width
- 7.25" (18.42 cm)
-
- Depth
- 12.5" (31.75 cm)
-
- Driver Enclosure Type
- MDF cabinet with extruded natural bead-blasted aluminum front baffle
-
- Driver Complement
-
- (1) 6.5" (16.51 cm) d (Round) Polypropylene BDSS Bass - Mid/Woofer
- (1) 1" (2.54 cm) d (Round) Annealed Aluminum Dome and Laterally Offset - Tweeter
- (1) 6" (15.24 cm) h x 10" (25.4 cm) w (Oval) Passive - Bass Radiator
ACCESSORIES
-
- Included Accessories
-
- (2) Acoustically transparent magnetic black speaker grilles
-
- Optional Accessories
-
- (1) ST1 Demand Series Speaker Stands (Pair) - Sold Separately
WARRANTY
-
- Cabinet Warranty
- 5 years
-
- Drivers Warranty
- 5 years
-
- Original Purchaser Only
- Yes
Cyrus OneHD Specifications
Pre outputs – connect to additional power amplifiers
High power, high voltage class AB headphone amplifier
Bi-wire compatible speaker binding posts
User upgradeable firmware
Bluetooth control app
Cyrus 4th generation Hybrid Class D amplifier
Outputs 2 x 100W (into 6 Ω at 0.1% THD+N)
SID – Speaker Impedance Detection
Linear power supply
Inputs
Asynchronous USB 2.0 input – up to 32/192 signals, and DSD 64 and DSD 128
Optical Toslink digital input – up to 24/192 signals
Coaxial SPDIF digital input – up to 24/192 signals
RCA input to built-in MM phono stage
aptX® HD compatible Bluetooth audio
3 x line level inputs – including AV integration option
Weight and Dimension
Dimensions (H X W X D) – 85 x 220 x 390mm
Weight – 5.6kg