15m Speaker Cable 2.5mm² - C2515S
Loudspeaker cable 2 x 2.5 mm²
Highlights
Why we love this product
With this 5.1 upgrade set, you can experience Surround Sound with the popular ULTIMA 40/20 HIFI speakers. The individual components are tuned perfectly for the ULTIMA 40/20 in order to provide optimal playback. The additional subwoofer will make you really feel the special effects.
Key advantages at a glance
- 5.1 upgrade set for the ULTIMA 40/20, suitable for any ULTIMA generation
- Upgrade for the ULTIMA 40/20 with a center, subwoofer, and rears from our fourth generation
- Components: 2x ULTIMA 20 bookshelf speakers UL 20 Mk4, 1x ULTIMA Center speaker UL 40 C Mk4, 1x T 10 subwoofer
- Suitable for any AV receiver
Features
All technologies at a glance
Popular all over Europe
The ULTIMA series is the result of over 40 years of experience designing speakers. It stands for extremely good sound at a reasonable price like no other speaker. With premium-class technologies, it reproduces balanced sound with Teufel’s classic punchy bass.
One special feature of the ULTIMA is that it still sounds big even for quiet background music. The ULTIMA series means that you get to experience music, games and TV audio the way they are supposed to sound regardless of volume.
Engineered in Berlin
Our laboratories and anechoic chambers are still where we engineered the current ULTIMA Mk4 Series. We gave the design a facelift and made it look a little nicer – it is now more timeless and modern than ever. We also incorporated tons of customer feedback.
Value you can feel
The front, which now features a very purist design, has also hidden the cover mounts better. The covers themselves look more elegant and feel similar to a high-quality textile, which makes them easier to fit into any living room.
Specifications
UL 20 Mk4 25 bookshelf speaker (1x)
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Description Item Width 21.5 cm Height 33.5 cm Depth 25.1 cm Weight 6.2 kg -
Description Item Terminal clamps Screw terminals, brass coated -
Description Item Banana plug compatible Yes Maximum cable diameter 4 mm Equalization port (position) back Equalization port 1 Removable front cover Yes Cabinet material MDF Cabinet surface Laminated Net internal volume 10.5 L Wall mounting brackets Yes Tweeter (number per enclosure) 1 Tweeter (diameter) 25 mm Tweeter (material) Textile Bass/Midrange driver (number per enclosure) 1 Bass/Midrange driver (diameter) 165 mm Bass/Midrange driver (material) Kevlar Continuous power handling (IEC - Long Term) 50 W Sensitivity (2.83 V / 1 m) 87 dB Frequency range 60 - 20000 Hz Peak power capacity (IEC - Short Term) 80 W Maximum sound pressure level 104 dB/1m Impedance 4 Ohm Acoustic principle 2-way-system Enclosure type Bass reflex Crossover frequency internal switch 2800 Hz
Center speaker UL 40 C Mk4 25
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Description Item Width 42 cm Height 17.2 cm Depth 18.6 cm Weight 5.9 kg -
Description Item Terminal clamps Screw terminals, brass coated -
Description Item Banana plug compatible Yes Maximum cable diameter 4 mm Removable front cover Yes Cabinet material MDF Cabinet surface Laminated Keyhole plate mounted Yes Wall mounting brackets Yes Tweeter (number per enclosure) 1 Tweeter (diameter) 25 mm Tweeter (material) Textile Bass/Midrange driver (number per enclosure) 2 Bass/Midrange driver (diameter) 130 mm Bass/Midrange driver (material) Kevlar Continuous power handling (IEC - Long Term) 100 W Sensitivity (2.83 V / 1 m) 88 dB Frequency range 80 - 20000 Hz Peak power capacity (IEC - Short Term) 150 W Maximum sound pressure level 107 dB/1m Impedance 4 - 8 Ohm Acoustic principle 2-way-system Enclosure type Closed
T 10 Subwoofer
High-end-class active subwoofer that can be configured in either front- or down-firing modes
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Description Item Width 35.1 cm Height 48.3 cm Depth 38 cm Weight 15.6 kg -
Description Item Cinch input 1 -
Description Item Power supply voltage 230 V Automatic on/off Yes Maximum power consumption 150 W Fixed AC power cable Yes Safety class 2 Fuse Yes Storage for settings when disconnected Yes Standby-Function Yes Standby-Power consumption 1 W Bass boost/EQ Yes Input gain adjustment Yes Level control Yes Phase control Yes Wireless Subwoofer Yes Power output capacity impulse (peak) Bass 150 W Amplifier configuration 1.0 Amplifier technology Class D Amplifier channels 1 -
Description Item Lowest frequency (-3 dB) 33 Hz Suitable for AV receiver Yes Equalization port 1 Down-firing Yes Front-firing Yes Cabinet material MDF Cabinet surface Laminated, matte Integrated stand Yes Woofer (number per enclosure) 1 Woofer (diameter) 250 mm Woofer (material) Aluminium Frequency range 33 - 190 Hz Maximum sound pressure level 115 dB/1m Acoustic principle 1-way-system Enclosure type Bass reflex
Accessories
Required accessories
Please check whether required cables are included.
Recommended accessories
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Subwoofer-Cable 5.0m - C3550W
High-end mono subwooer cinch connection cable
24,99 € -
Banana Plug C8502P (pair)
Banana plugs: gold plated with screw terminals
12,99 € -
K&M Standfuß AC 7001 SP 3 (Paar)
K&M brand HIFI-class floor stands (2x) for compact speakers
199,00 € -
K&M Standfuß AC 7001 SP 3 (Stk.)
K&M brand HIFI-class floor stand for compact speakers
99,99 € -
K&M AC 8500 SM wall mount (pair)
High quality wall mount for compact speakers with M6 thread in the baseplate
99,99 € -
AC 7500 SM wall mount
Wall mount for compact class wood box format speakers and dipoles
29,99 € -
REARSTATION
Enables wireless sound transmission to 2 passive speakers
399,99 € -
Subwoofer Wireless Transmitter
Transmission module for sending subwoofer signals wirelessly
99,99 € -
ULTIMA 20 Mk4 Cover (pair)
1 pair of replacement covers for the ULTIMA 20 (MK3) bookshelf speakers, not compatible with prior generations
34,99 € -
ULTIMA CENTER 2 Mk4 Cover
Replacement cover for the ULTIMA Center (MK4) center speaker, not compatible with prior generations
24,99 € -
T 10 WOOFER SLEEVE
Sleeve for the Teufel T 10 subwoofer
24,99 €
Included components
ULTIMA 40/20 "2.0>5.1 Surround Expansion Set"
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1 × UL 20 Mk4 25 dual bookshelf speakers
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Black
- 2 × UL 20 Mk4 25 bookshelf speaker (1x) – Black
- 2 × rubber feet (4 pcs.) for ULTIMA 20 / 40 / Center Mk4 – Black
- 1 × ULTIMA 20 Mk4 Cover (pair) – Black
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1 × Center speaker UL 40 C Mk4 25
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Black
- 1 × rubber feet (4 pcs.) for ULTIMA 20 / 40 / Center Mk4 – Black
- 1 × ULTIMA CENTER 2 Mk4 Cover – Black
- 1 × T 10 Subwoofer – Black
Downloads & support
Downloadable documents
- BDA Ultima 20 Mk4 [PDF]
- Declaration of conformity: UL 20 Mk4 25 dual bookshelf speakers
- Operating instructions: Center speaker UL 40 C Mk4 25
- Declaration of conformity: Center speaker UL 40 C Mk4 25
- Operating instructions: T 10 Subwoofer
- Declaration of conformity: T 10 Subwoofer
- Quick Start Guide: T 10 Subwoofer
- Safety Booklet: T 10 Subwoofer
Shipping information
Shipping informationInformation about the guarantee
Warranty and guaranteeAudio glossary
Audio lexicon: Technical terms quickly explainedContact details
Store Finder
Experience our products in person and talk to our team directly for the best expert advice. Overview
1 Offer valid until 05.03.2026 23:59.
The voucher is only intended for the use of private customers. The voucher cannot be redeemed for cash, nor can it be used in combination with other vouchers. It cannot be used for orders that have already been placed. The resale of a voucher is prohibited and it will lose its value in the case of being resold. You can learn more about the terms and conditions in the General Business Conditions.