# Mission 778X Amplifier + Wharfedale Diamond 12.4 Floorstanding Speakers The Mission 778X blends vintage aesthetics with modern audio performance, delivering 65W of powerful, refined sound in a compact, retro-inspired design. Ideal for both vinyl lovers and digital streamers, it features Bluetooth, RCA line, coaxial, and digital inputs. Its integrated phono stage is optimized for MM cartridges, providing precise sound without the need for an external pre-amp. The DIAMOND 12.4 from Wharfedale's 12 series is the largest and most powerful model, designed to fill any room with its impactful and immersive performance. With dual 150mm KlarityTM drivers and a 25mm dome tweeter, this 2.5 way system features exceptional crossover technology for refined mid-range and bass frequencies and smoothly extended high frequencies. Perfect for larger systems and home theatre setups, the DIAMOND 12.4 delivers a chest-pounding sound that will impress any audiophile. **Mission 778X 65W Integrated Amplifier with Phono & Bluetooth** The Mission 778X is phono-ready with a JFET-based phono stage that provides precise RIAA equalisation, optimized for MM cartridges, so no extra pre-amp is needed. It features RCA line, digital, and coax connections, alongside a Bluetooth receiver with aptX/AAC for CD-level audio streaming from smart devices, offering both convenience and high-quality sound. This amplifier is equipped with a high-performance ESS ES9018K2M Reference chip, utilizing ESS Technology’s 32-bit HyperStream architecture and Time Domain Jitter Eliminator. This allows for ultra-low noise digital audio file compatibility, with sampling rates up to 384kHz (PCM) and DSD256. The headphone stage matches the performance of standalone headphone amplifiers, delivering dynamic, detailed sound thanks to its high slew rate design. All around, the 778X provides engaging and refined performance, catering to modern music enthusiasts while honoring Mission’s rich heritage. [View All Product Details](/products/mission-778x-integrated-amplifier "Mission 778X 65W Integrated Amplifier with Phono & Bluetooth") **Wharfedale Diamond 12.4 Floorstanding Speakers (Pair)** The powerhouse model of the Wharfedale DIAMOND 12 series, the DIAMOND 12.4 is the room-filling, chest-pounding, largest model in the series. For larger, more powerful systems and cinema-style home theatre experiences, the DIAMOND 12.4 will fill your room with an impactful, immersive performance. Configured in a 2.5 way system with exception crossover technology, the DIAMOND 12.3 utilises dual 150mm (6.5”) KlarityTM drivers for impactful yet refined mid-range and bass frequencies, while the 25mm (1”) dome tweeter delivers open and smoothly extended high frequencies. [View All Product Details](/products/wharfedale-diamond-12-4-floorstanding-speakers-pairs "Wharfedale Diamond 12.4 Floorstanding Speakers (Pair)") ###### What You Get **AMPLIFIER** - 1 x Mission 778X Integrated Amplifier - 1 x Power Cable - 1 x Remote Control - 1 x Antenna - 1 x User Manual **SPEAKERS** - 2 x 12.4 Floorstanding Speakers - 1 X User Manual ###### Specifications AMPLIFIER - **Model:** 778X - **General Description:** Digital-to-Analogue Converter, Stereo Amplifier - **Integrated Amplifier:** (45 watts @8 ohms, 65 watts @4 ohms) - **Reference Chip:** ESS Sabre32 ES9018K2M Reference Chip - **Ultra-low Noise:** Digital Audio File Compability (384kHz PCM, DSD256) - **Bluetooth:** 5.0 (aptX / AAC) Support - **Phono Stage:** Dedicated High-performance, Low-noise MM Phono Stage - **Headphone AMP:** With High-speed Output Signal Transition - **Large Tractile Controls:** With LED Level Indicators - **Inputs:** 1 x Coaxial, 2 x Toslink Optical, 1 x PC USB, 1 x Bluetooth (aptX/AAC), 2 x AUX,1 x RCA (Phono MM) - **Outputs:** 1 x Coaxial, 1 x Toslink Optical, 1 x RCA (PRE Out) - **Sampling Frequency:** Optical / Coaxial: 44.1kHz-192kHz; PC USB: 44.1kHz-384kHz(PCM) / DSD64, DSD128, DSD256 - **Preamplifier Section:** Gain (max.) +0dB (Line), +47dB (Phono MM) - **Input Impedance:** 10K (AUX); 47K//100pF (Phono MM) - **Frequency Response (ref. 1kHz):** 20Hz-20kHz (±0.1dB) - **PRE Output Level:** 2.1Vrms (max.) - **PRE Output SNR:** >110dB (A-weighted) - **DAC -D to A Converter:** ESS Sabre32 ES9018K2M - **Resolution:** 32-bit - **Max. Sampling Frequency:** Optical/Coaxial: 192kHz; / USB: PCM 384kHz / 11.2896MHz (DSD256) - **Total Harmonic Distortion (THD):** <0.001% (1KHz @ 0dBFS) - **Output level (0dBFS, 1KHz):** 2.1Vrms - Power Amplifier Section -Gain/+31dB - **Rated Power Output:** 2x45W(@8ohms); 2 x 65W (@ 4 ohms) - **Frequency Response (ref. 1kHz):** 20Hz-20KHz (± 0.5dB) - **Total Harmonic Distortion (THD):** <0.005% (30W / 8 ohms) - **Standby Power Consumption:** <0.5W - **Headphone Amplifier-Output Impedance:** 4.7 ohms - **Load impedance:** 20-600 ohms - **Dimensions (mm) (W x H x D):** 236x98x380.6 - **Net Weight:** 6.3kg - **Finish:** Black / Silver SPEAKERS - **General Description:** 2.5-way floorstanding speaker - **Enclosure Type:** bass reflex - **Bass Driver:** 6.5"(150mm) advanced PP Cone - **Midrange Driver:** 6.5"(150mm) advanced PP Cone - **Treble Driver:** 1"(25mm) Textile Dome - **AV Shield:** No - **Sensitivity(2.83V @ 1m):** 89dB - **Recommended Amplifier Power:** 30-200W - **Peak SPL:** 102dB - **Nominal Impedance:** 8Ω Compatible - **Minimum Impedance:** 5Ω - **Frequency Response(+/-3dB):** 40Hz ~ 20kHz - **Bass Extension(-6dB):** 35Hz - **Crossover Frequency:** 2.1kHz - **Cabinet Volume (in litres):** 40.8L - **Dimensions (H x W x D):** (1100+50) x 200 x (350+28) mm - **Net Weight:** 22.4kg/pcs - **Warranty:** 1 Year ## Details - **Price:** 1249.0 GBP - **Vendor:** Mission - **Type:** HiFi Systems - **Tags:** Available To Order, Bundle, Free HiFi Wiring Kit ## Variants | Variant | Price | Available | |---------|-------|-----------| | Black / Black Oak | 1249.00 GBP | In stock | | Black / Walnut Pearl | 1249.00 GBP | In stock | | Black / Light Oak | 1249.00 GBP | In stock | | Silver / Black Oak | 1249.00 GBP | In stock | | Silver / Walnut Pearl | 1249.00 GBP | In stock | | Silver / Light Oak | 1249.00 GBP | In stock | ## Images - Mission 778X Amplifier + Wharfedale Diamond 12.4 Floorstanding Speakers - K&B Audio - Mission 778X Amplifier + Wharfedale Diamond 12.4 Floorstanding Speakers - K&B Audio - Mission 778X Amplifier + Wharfedale Diamond 12.4 Floorstanding Speakers - K&B Audio - Mission 778X Amplifier + Wharfedale Diamond 12.4 Floorstanding Speakers - K&B Audio - Mission 778X Amplifier + Wharfedale Diamond 12.4 Floorstanding Speakers - K&B Audio - Mission 778X Amplifier + Wharfedale Diamond 12.4 Floorstanding Speakers - K&B Audio - Mission 778X Amplifier + Wharfedale Diamond 12.4 Floorstanding Speakers - K&B Audio - Mission 778X Amplifier + Wharfedale Diamond 12.4 Floorstanding Speakers - K&B Audio - Mission 778X Amplifier + Wharfedale Diamond 12.4 Floorstanding Speakers - K&B Audio - Mission 778X Amplifier + Wharfedale Diamond 12.4 Floorstanding Speakers - K&B Audio --- > Source: [K&B Audio](https://www.kbaudio.co.uk/products/mission-778x-amplifier-wharfedale-diamond-12-4-floorstanding-speakers) > Updated: 2026-04-29