Audio T Verdict
The Dynaudio Evoke 25C is the dedicated centre speaker for the Evoke range, combining a Cerotar soft-dome tweeter with twin 14cm Esotec+ MSP drivers.
Its 2.5-way design gives dialogue excellent body and clarity, while the shared Evoke technology helps effects move smoothly between the centre and matching front speakers.
With 88dB sensitivity, a 4-ohm impedance and 200W power handling, it deserves a capable AV receiver or power amplifier. Correct support, rear clearance and careful aiming towards the listening area are equally important.
For an Evoke home cinema system, the Evoke 25C is the natural choice and a significant step up from a smaller, more conventional centre speaker.
Dynaudio Evoke 25C Centre Speaker
The Dynaudio Evoke 25C is a premium passive 2.5-way centre-channel loudspeaker designed for home cinema and multichannel music systems.
It combines:
- One 28mm Cerotar coated fabric soft-dome tweeter
- Dynaudio’s Hexis resonance-control inner dome
- Two 14cm long-throw Esotec+ MSP drivers
- A model-specific 2.5-way passive crossover
- A rear-ported bass-reflex enclosure
- A rigid black aluminium front baffle
- A subtly curved MDF cabinet
- A removable black grille
- A single pair of loudspeaker terminals
The Evoke 25C is supplied as one centre speaker rather than as a stereo pair.
The Centre of an Evoke Home Cinema System
The centre speaker commonly reproduces most film and television dialogue, along with music and effects positioned in the middle of the picture.
Its responsibilities can include:
- Dialogue and narration
- Voices anchored to the screen
- Front-stage music
- Effects positioned in the centre of the picture
- Sounds moving between the left and right speakers
- Vocals within multichannel music recordings
A well-matched centre speaker helps voices remain clear and tonally consistent as sounds move across the front soundstage.
Designed to Match the Evoke Range
The Evoke 25C uses the same Cerotar tweeter and related Esotec+ MSP technology found throughout the Evoke family.
It can be combined with:
Using speakers from the same range helps preserve tonal consistency through the front channels and around the complete surround system.
2.5-Way Driver Configuration
The Evoke 25C uses a 2.5-way arrangement with the Cerotar tweeter positioned between two 14cm MSP drivers.
Within this configuration:
- Both MSP drivers contribute through the bass
- One driver is progressively filtered through the lower crossover region
- The other continues through the midrange
- The Cerotar tweeter reproduces the upper frequencies
This provides greater low-frequency output and dynamic ability while limiting interference between two horizontally separated drivers through the upper midrange.
1200Hz and 2300Hz Crossover Frequencies
Dynaudio specifies crossover frequencies of approximately 1200Hz and 2300Hz.
Both MSP drivers contribute below the lower transition, while one continues through the vocal range before handing over to the Cerotar tweeter.
The crossover, drivers and aluminium baffle are engineered together to maintain dialogue clarity and consistent tonal balance.
Second-Order Crossover Topology
The Evoke 25C uses a second-order crossover topology developed specifically for its driver arrangement and cabinet.
The crossover manages:
- Frequency division between the drivers
- Relative output levels
- Electrical and acoustic phase
- Integration across the listening area
- Consistency with the other Evoke speakers
28mm Cerotar Soft-Dome Tweeter
High frequencies are reproduced by Dynaudio’s 28mm Cerotar coated fabric soft-dome tweeter.
The Cerotar was developed for the Evoke range using ideas derived from the Esotar Forty anniversary tweeter and the Esotar3 used in the Confidence range.
Its principal elements include:
- A precision-coated fabric diaphragm
- Dynaudio’s Hexis inner dome
- A lightweight aluminium voice coil
- A strontium-carbonate Ferrite+ ceramic magnet
- Controlled airflow behind the playing surface
- A carefully damped internal cavity
The tweeter is designed to reproduce dialogue, music and soundtrack detail without introducing excessive brightness or listening fatigue.
Precision-Coated Fabric Diaphragm
The Cerotar uses a carefully coated fabric dome rather than a rigid metal diaphragm.
The fabric and surface treatment provide:
- Low moving mass
- Controlled internal damping
- Smooth diaphragm behaviour
- Consistent production
- Reduced dependence on a strong resonant peak
The dome, coating, voice coil, Hexis and magnet system operate as one complete high-frequency assembly.
Hexis Resonance-Control Inner Dome
The Hexis is a small dimpled inner dome positioned directly behind the Cerotar diaphragm.
Its shape controls airflow behind the playing surface and helps prevent internal standing waves from reflecting back towards the soft dome.
Reducing this unwanted energy can improve:
- Dialogue intelligibility
- High-frequency smoothness
- Transient control
- Low-level detail
- Decay and ambience
- Integration with the MSP driver
Ferrite+ Ceramic Tweeter Magnet
The Cerotar tweeter is powered by a strontium-carbonate Ferrite+ ceramic magnet system.
The motor provides the magnetic field required to move the lightweight aluminium voice coil and fabric dome accurately.
It is designed to deliver useful sensitivity, clear detail and controlled dynamics during quiet dialogue and demanding soundtrack sequences.
Twin 14cm Esotec+ MSP Drivers
Two 14cm long-throw Esotec+ drivers reproduce the bass and midrange.
Each driver incorporates:
- A one-piece MSP diaphragm
- An integrated central dust-cap area
- Dynaudio Balance Ribs
- A lightweight 38mm aluminium voice coil
- A rigid glass-fibre voice-coil former
- An aramid-fibre spider
- A Contour-derived long-throw surround
- A strontium-carbonate Ferrite+ ceramic magnet
The two-driver arrangement provides greater total cone area and dynamic ability than a conventional single-driver centre speaker.
One-Piece MSP Cones
Each diaphragm is made from Dynaudio’s Magnesium Silicate Polymer, normally abbreviated to MSP.
The cone and central dust-cap area are moulded as one continuous component rather than joined together as separate pieces.
This construction provides:
- Consistent behaviour across the diaphragm
- Controlled stiffness
- Useful internal damping
- A direct mechanical connection to the voice coil
- No separate dust-cap joint to introduce another resonance
Dynaudio Balance Ribs
The small ribs visible around the centre of each MSP cone connect the diaphragm to the voice-coil former behind it.
These Balance Ribs help the cone and coil move as one controlled mechanical system.
The design transfers the motor’s force into the diaphragm while helping it maintain its intended shape as excursion increases.
38mm Aluminium Voice Coils
Each Esotec+ driver uses a 38mm-diameter aluminium voice coil.
Aluminium keeps the moving mass low and allows Dynaudio to use additional windings without the full weight of an equivalent copper coil.
The design provides:
- Fast transient response
- Controlled dialogue reproduction
- Useful low-frequency excursion
- Improved interaction with the magnet system
- Consistent performance at higher playback levels
Glass-Fibre Voice-Coil Formers
The voice-coil windings are supported by rigid glass-fibre formers bonded directly behind the MSP diaphragms.
The formers must remain stable as the cones move and as temperature changes during prolonged or high-level playback.
Glass fibre provides a useful combination of rigidity, low mass and suitable electrical behaviour.
Aramid-Fibre Spiders
Each driver uses an aramid-fibre spider as part of its suspension system.
The spider helps keep the voice coil centred while controlling the cone’s forward and backward movement.
It must permit the required excursion without allowing the moving assembly to become unstable or misaligned.
Contour-Derived Long-Throw Surrounds
The Esotec+ drivers use long-throw surrounds derived from technology developed for Dynaudio’s Contour range.
The surrounds allow greater controlled movement, helping the twin 14cm cones produce convincing bass and dynamic impact.
They must also preserve clear midrange performance because one driver continues through the critical vocal region.
Rear-Ported Bass-Reflex Cabinet
The Evoke 25C uses a rear-mounted bass-reflex port.
The port works with the cabinet volume and twin MSP drivers to extend low-frequency output beyond what would normally be possible from a similarly sized sealed enclosure.
The rear position means that sufficient space should be provided behind the cabinet for airflow, speaker cable and connectors.
Allow Additional Installation Depth
The published complete depth of 277mm includes the grille but does not include the additional clearance required for the rear port, speaker cable and connectors.
Check the usable shelf depth before installing the speaker beneath a television or projection screen.
50Hz to 23kHz Frequency Response
Dynaudio specifies a frequency response from 50Hz to 23kHz within a +/-3dB tolerance.
This gives the Evoke 25C enough low-frequency weight to reproduce dialogue and front-stage effects convincingly, while a suitable subwoofer can handle the deepest soundtrack information.
Actual in-room response will also depend on:
- Distance from the rear wall
- The supporting shelf or furniture
- Room dimensions
- AV receiver crossover settings
- Listening position
- Subwoofer integration
- Room-correction settings
88dB Sensitivity
The Evoke 25C has a specified sensitivity of 88dB at 2.83V measured at one metre.
This makes it more sensitive than the Evoke 10 and Evoke 20 standmount speakers, although amplifier requirements should not be judged from sensitivity alone.
The required output will depend on:
- Room size
- Listening distance
- Preferred playback level
- Dynamic peaks within the soundtrack
- The chosen bass-management crossover
- Amplifier current delivery
- The number of channels operating simultaneously
4-Ohm Rated Impedance
Dynaudio specifies a rated impedance of 4 ohms.
The partnering AV receiver or power amplifier should be suitable for a 4-ohm speaker and capable of maintaining clean output at the required listening level.
An AV receiver’s headline power rating may be measured with only one or two channels operating. The output available when several channels are driven simultaneously can be lower.
200W IEC Long-Term Power Handling
Dynaudio specifies IEC long-term power handling of 200W.
This does not mean that a 200W amplifier is compulsory, nor does it guarantee that the speaker cannot be damaged by an amplifier carrying the same rating.
A lower-powered amplifier driven into clipping can produce harmful distortion, while a more powerful amplifier used sensibly may provide cleaner dynamic headroom.
Reduce the Volume if the Sound Becomes Distorted
Audible hardness, compression, crackling or obvious distortion can indicate that the amplifier or centre speaker is being overloaded.
Reduce the volume immediately rather than continuing at the same level.
AV Receiver and Amplifier Matching
The Evoke 25C can be powered by a capable AV receiver or by a separate AV processor and power amplifier.
Important considerations include:
- Stable operation into 4 ohms
- Power available with several channels operating
- Current delivery
- Power-supply capacity
- External power-amplifier outputs
- Room size and listening distance
- Required film and music playback levels
A well-specified AV receiver may be suitable for a smaller Evoke system. Larger rooms, higher playback levels or Evoke 50 front speakers may justify additional power amplification.
Browse home cinema amplifiers and AV receivers at Audio T.
Bass Management and Crossover Settings
The published 50Hz lower cutoff does not automatically mean the Evoke 25C should be configured as a full-range or Large speaker within an AV receiver.
Using an appropriate bass-management crossover can:
- Reduce low-frequency demand on the centre speaker
- Reduce the power required from the centre amplifier channel
- Improve dialogue clarity
- Increase dynamic headroom
- Transfer the deepest bass to a suitably positioned subwoofer
- Improve consistency across the seating area
The best setting will depend on the room, listening level, subwoofer system and speaker position.
Check the Automatic Calibration Result
Automated room calibration provides a useful starting point, but its speaker size, distance, level and crossover settings should be reviewed.
Final adjustments should be checked using familiar dialogue, music and effects.
Subwoofer Integration
A suitable subwoofer handles the deepest low-frequency effects and can reduce the workload placed on the Evoke 25C and AV receiver.
Correct integration requires attention to:
- Crossover frequency
- Subwoofer level
- Phase
- Delay or distance settings
- Room position
- Interaction with the front speakers
The centre channel should retain body and authority without sounding boomy or disconnected from the subwoofer.
Dynaudio Sub 6
The Dynaudio Sub 6 is a powerful active subwoofer suitable for premium Dynaudio stereo and home cinema systems.
The final subwoofer choice should consider room size, required output, listening distance and the number of seats rather than brand matching alone.
Positioning Beneath or Above the Screen
The Evoke 25C should be positioned directly beneath or above the screen and centred horizontally in relation to the picture.
Keeping it close to the screen helps dialogue appear connected to the image rather than coming from a separate point elsewhere in the room.
Where a television is mounted relatively high, positioning the centre speaker beneath it is normally the most practical arrangement.
Aiming the Speaker Towards the Listener
If the Evoke 25C must sit significantly below or above seated ear height, it may benefit from being angled towards the primary listening area.
Correctly aiming the speaker can help:
- Improve dialogue intelligibility
- Anchor voices more closely to the picture
- Preserve high-frequency detail
- Improve integration with the front speakers
- Reduce the impression that sound is coming from the furniture
Any angled support must remain stable and must not allow the speaker to move or slide.
Strong and Stable Support
The Evoke 25C weighs approximately 11.8kg.
The supporting shelf, cabinet or stand must carry it safely without:
- Sagging
- Rocking
- Flexing
- Resonating audibly
- Obstructing the rear port
Large unsupported furniture panels can vibrate in sympathy with the speaker and reduce dialogue clarity.
Check the Installation Before Positioning the Speaker
The cabinet is 600mm wide and weighs approximately 11.8kg.
Confirm the support’s load rating, usable width, depth, ventilation and cable clearance before installing the speaker beneath a screen.
Keep the Front Baffle Clear
Where practical, position the black aluminium baffle close to the front edge of the supporting shelf.
Recessing the speaker deeply into furniture can create reflections from nearby shelf surfaces and side panels.
Do not place equipment, ornaments or decorative objects directly in front of the tweeter or MSP drivers.
Black Aluminium Front Baffle
The Evoke 25C uses a rigid black aluminium baffle across the front of its cabinet.
The baffle provides a stable mounting surface for the Cerotar tweeter and twin MSP drivers while giving the centre speaker a clean, purposeful appearance.
Its dark finish also helps the speaker remain visually discreet beneath a television or projection screen.
Curved MDF Cabinet
The cabinet uses the subtly curved styling found throughout the Evoke range.
The enclosure provides a stable platform for the drivers while reducing the visual bulk associated with a conventional rectangular centre speaker.
Hidden fixings and clean surfaces allow the Evoke 25C to retain a refined appearance with or without its grille fitted.
Black, White, Walnut and Blonde Wood Finishes
Audio T currently lists the Evoke 25C in:
- Black High Gloss
- White High Gloss
- Walnut Wood
- Blonde Wood
Availability can vary according to current UK production and stock.
High-Gloss Lacquer Finishes
The Black High Gloss and White High Gloss versions use Dynaudio’s multi-stage lacquering process.
The finish produces a deep, smooth surface with an almost glass-like appearance.
High-gloss cabinets should be cleaned carefully with a clean, soft cloth to reduce the risk of fine surface marks.
Open Natural Wood Veneers
Walnut Wood provides a darker, warmer appearance, while Blonde Wood uses a lighter natural tone.
The open veneers allow the texture and character of the timber to remain visible and tactile.
Natural veneer will display individual differences in grain, colour and pattern.
Black Removable Grille
A black removable grille is supplied with every cabinet finish.
The grille helps protect the Cerotar tweeter and MSP cones from dust and accidental contact.
Never press on the delicate tweeter diaphragm while removing or replacing the grille.
Channel-Level Matching
The centre-channel level should be matched with the front left and right speakers.
If the centre is set too low, dialogue can become difficult to follow. If it is set too high, voices may sound detached from the surrounding soundtrack.
Small adjustments may be useful after automatic calibration, but large corrections can indicate a positioning, amplification or speaker-matching problem.
Speaker Distance and Delay
The Evoke 25C may be closer to the listening position than the front left and right speakers.
The AV receiver uses distance or delay settings to align the arrival time from each channel.
Incorrect settings can weaken dialogue focus and reduce the precision of effects moving across the front soundstage.
Single-Wire Loudspeaker Connection
The Evoke 25C uses one pair of rear loudspeaker terminals.
The speaker is designed for conventional single wiring rather than passive bi-wiring or bi-amping.
The AV receiver or amplifier should be switched off before the speaker cable is connected or removed.
Correct Cable Polarity
Connect the positive amplifier terminal to the positive speaker terminal and the negative amplifier terminal to the negative speaker terminal.
Incorrect polarity can affect dialogue focus, bass integration and consistency with the front left and right speakers.
Loose bare-wire strands must not be allowed to touch the opposite terminal.
Speaker-Cable Selection
The speaker cable should have sufficiently low resistance for its required length and should be compatible with the AV receiver or power amplifier.
Selection should consider:
- Total cable length
- Conductor area
- Amplifier compatibility
- Connector quality
- Installation route
- The balance of the complete system
Browse speaker cables available from Audio T.
Evoke 25C or Emit 25C?
Choose the Evoke 25C When
- Evoke front speakers are being used
- Greater refinement and output are required
- The black aluminium baffle is preferred
- Premium lacquer or wood finishes are important
- The AV amplification justifies the additional investment
- The larger 600mm cabinet can be accommodated
Choose the Emit 25C When
- Emit front and surround speakers are being used
- A more affordable Dynaudio centre is required
- The smaller cabinet better suits the furniture
- The custom laminate finishes suit the room
- The complete system budget needs to remain balanced
- The Emit model provides the required output and clarity
The Dynaudio Emit 25C is the dedicated centre speaker for the more affordable Emit range.
Evoke 25C or Contour 25Ci?
Choose the Evoke 25C When
- An Evoke home cinema system is being assembled
- A compact premium centre is required
- Twin 14cm MSP drivers provide sufficient output
- The furniture cannot support a 24kg centre speaker
- The lower purchase price keeps the system balanced
- The system does not require Contour-level engineering
Choose the Contour 25Ci When
- Contour i front speakers are being used
- The Esotar2i tweeter is required
- Twin 18cm MSP drivers suit the room
- Greater scale and power handling are priorities
- The support can safely carry the larger cabinet
- The complete system justifies the higher investment
The Dynaudio Contour 25Ci is a substantially larger centre speaker with an Esotar2i tweeter and twin 18cm MSP drivers.
Running-In Period
The Evoke 25C can be used immediately after installation, but the driver suspensions may continue to settle during the first several hours of normal playback.
Bass response, integration and overall ease may improve as the moving parts reach their intended flexibility.
Special test signals or continuous high-volume playback are unnecessary. Normal film, television and music use at sensible levels is sufficient.
Cabinet and Driver Care
Clean the cabinet with a soft, dry or very slightly damp cloth.
Do not use:
- Abrasive cleaning products
- Furniture polish
- Solvents
- Aerosol sprays
- Excessive water
Never touch the Cerotar soft dome. Dust on the MSP cones, aluminium baffle or grille should be removed gently with a clean, soft cloth or brush.
System Matching
Well Suited To
- Dynaudio Evoke front and surround speakers
- Quality AV receivers
- AV processors with separate power amplification
- Small and medium-sized cinema rooms
- Living-room television systems
- Multichannel music systems
- Systems prioritising dialogue clarity
- Carefully integrated active subwoofers
Check Before Buying
- The amplifier is suitable for a 4-ohm speaker
- The support can safely carry approximately 11.8kg
- At least 600mm of clear width is available
- Additional rear-port and cable clearance is available
- The speaker can be aimed towards the listening position
- The cabinet finish matches the other Evoke speakers
- The furniture does not obstruct the front baffle
- Room calibration and subwoofer setup have been considered
Related Dynaudio Products and Audio T Guides
Key Features
- Premium passive centre-channel loudspeaker
- Supplied as one speaker
- Designed to match the Dynaudio Evoke range
- 2.5-way driver configuration
- 28mm Cerotar coated fabric soft-dome tweeter
- Dynaudio Hexis resonance-control inner dome
- Ferrite+ ceramic tweeter magnet
- Lightweight aluminium tweeter voice coil
- Two 14cm Esotec+ MSP drivers
- One midrange and bass driver
- One additional bass driver
- One-piece Magnesium Silicate Polymer cones
- Integrated central dust-cap areas
- Dynaudio Balance Ribs
- 38mm aluminium voice coils
- Rigid glass-fibre voice-coil formers
- Aramid-fibre spiders
- Contour-derived long-throw surrounds
- Ferrite+ ceramic driver magnets
- Model-specific passive crossover
- 1200Hz lower crossover frequency
- 2300Hz upper crossover frequency
- Second-order crossover topology
- Rear-ported bass-reflex cabinet
- Black aluminium front baffle
- Subtly curved MDF enclosure
- 50Hz to 23kHz response within +/-3dB
- 88dB sensitivity
- 4-ohm rated impedance
- 200W IEC long-term power handling
- Single-wire loudspeaker connection
- Black removable grille
- Black High Gloss finish
- White High Gloss finish
- Walnut Wood finish
- Blonde Wood finish
- 600mm cabinet width
- 11.8kg weight
- Suitable for home cinema and multichannel music
- Up to eight-year total warranty after registration
Frequently Asked Questions
Is the Dynaudio Evoke 25C sold as a pair?
No. It is supplied as one dedicated centre-channel speaker.
Which speakers is it designed to match?
It is designed to match the Evoke 10, Evoke 20, Evoke 30 and Evoke 50.
Is it suitable for stereo use?
It is designed primarily as a centre channel. Conventional Evoke stereo speakers are more appropriate for left and right use.
Which tweeter does it use?
A 28mm Cerotar coated fabric soft-dome tweeter with Dynaudio’s Hexis inner dome.
What is the Hexis?
It is a dimpled inner dome positioned behind the tweeter diaphragm to control airflow and reduce unwanted internal resonance.
How many MSP drivers are fitted?
Two 14cm Esotec+ MSP drivers are positioned on either side of the Cerotar tweeter.
What does MSP mean?
MSP stands for Magnesium Silicate Polymer, Dynaudio’s proprietary cone material.
What is a 2.5-way crossover?
Both MSP drivers contribute through the bass, but one is progressively filtered through the lower crossover region while the other continues through the midrange before handing over to the tweeter.
What are the crossover frequencies?
Dynaudio specifies approximately 1200Hz and 2300Hz.
What is the crossover topology?
Dynaudio specifies a second-order passive crossover.
What type of bass port is used?
A rear-mounted bass-reflex port.
What is the frequency response?
Dynaudio specifies 50Hz to 23kHz within +/-3dB.
What is the sensitivity?
88dB at 2.83V measured at one metre.
What is the rated impedance?
4 ohms.
Does it require a 200W amplifier?
No. The 200W figure is its IEC long-term power-handling specification, not a compulsory amplifier rating.
Can an AV receiver power it?
Yes, provided the receiver is suitable for a 4-ohm speaker and has sufficient power and current for the room, listening distance and required playback level.
Would a separate power amplifier help?
It may provide greater control and headroom in larger rooms or systems using Evoke 50 front speakers.
Should the Evoke 25C be configured as Large?
Not automatically. An appropriate bass-management crossover can reduce amplifier demand and improve integration with the subwoofer.
Where should the speaker be positioned?
Directly beneath or above the screen and centred horizontally in relation to the picture.
Can it be placed inside a cabinet?
A tightly enclosed cabinet is not recommended because the speaker is rear ported. An open-backed or well-ventilated support is preferable.
Can it be tilted towards the listener?
Yes. A secure angled support can improve clarity where the speaker must sit significantly above or below seated ear height.
How much shelf width is required?
The cabinet is 600mm wide.
How much shelf depth is required?
The complete published depth is 277mm. Additional clearance is required for the rear port, speaker cable and connectors.
How much does it weigh?
Approximately 11.8kg.
Can the speaker be bi-wired?
No. It uses one pair of loudspeaker terminals for conventional single wiring.
Which finishes are available?
Audio T currently lists Black High Gloss, White High Gloss, Walnut Wood and Blonde Wood, subject to availability.
Is a grille included?
Yes. A black removable grille is supplied.
Which centre speaker is the next step up?
The Dynaudio Contour 25Ci is the next centre-channel model in Dynaudio’s passive range.
Does the speaker require running in?
It can be used immediately, but the drivers may continue to settle during the first several hours of normal playback.
What warranty is available?
Dynaudio passive speakers receive the applicable standard legal and manufacturer warranty. Registration within 12 months of purchase can extend total cover to 96 months, subject to Dynaudio’s full terms and proof of purchase.
Why Buy From Audio T?
- Dynaudio Evoke 25C demonstrations
- Comparisons with the Emit 25C and Contour 25Ci
- Evoke 10, 20, 30 and 50 system-matching advice
- AV receiver and separate power-amplifier comparisons
- 4-ohm amplifier compatibility checks
- Centre-speaker shelf and support assessment
- Screen-height and speaker-angle guidance
- Rear-port and cabinet-clearance advice
- Speaker-cable selection and termination
- AV crossover and bass-management setup
- Channel-level, distance and room-calibration assistance
- Subwoofer selection and integration
- Home cinema planning and installation
- Finish selection and cabinet-care guidance
- Home demonstrations may be available by arrangement
- Part exchange may be available on suitable equipment
- Dynaudio warranty-registration guidance
- Ongoing system, setup and after-sales support
Contact your local Audio T store to arrange a demonstration or discuss speaker matching, amplification, placement and calibration for the Dynaudio Evoke 25C.