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Description
Mission 778x + Wharfedale Diamond 12.3 Speakers + QED Cables
The Mission 778X is a modern take on a classic Mission amplifier, blending vintage style touches with the features audiophiles expect today. Designed for music lovers who want elegance, flexibility and quality in a compact form, it makes an excellent centrepiece for both serious hi-fi setups and more modest systems.
Despite its half-width chassis, the 778X packs plenty of punch: 45 watts per channel into 8 ohms and 65 watts into 4 ohms. Whether driving medium-sized speakers in a living room or a smaller stand-mount pair in a study, it delivers clean, dynamic sound without strain. Its signal path is refined, with careful attention to distortion, noise floor, and component quality.
For digital lovers, it includes a high-performance ESS Sabre32 DAC, capable of decoding up to 384 kHz PCM and DSD256 via USB, with optical and coaxial inputs up to 192 kHz. Analogue sources are equally well supported: twin RCA line inputs, a dedicated MM (moving magnet) phono stage with low noise, and a front-panel high-drive headphone amplifier make it versatile for turntables, digital streamers, tablets or headphones alike.
Connectivity is generous: USB-B, coaxial, optical, Bluetooth (aptX/AAC), analogue inputs, and useful outputs such as pre-out, meaning you can expand to external power amps or add other gear in time. Large tactile control knobs, LED level indicators, and a well-finished metal case complete the package, adding to the sense of quality and usability.
Wharfedale Diamond 12.3 Speakers
Wharfedale's multi-award winning Diamond 12.3 is a compact floorstanding speaker that delivers in every respect - they sound beautifully balanced, are well made and offer unbeatable value for money.
Key Features:
- 2.5-Way Configuration: A sophisticated driver setup featuring dual 5" Klarity™ woofers and a 1" textile dome tweeter ensures seamless integration from thunderous bass to sparkling highs.
- Klarity™ Cone Technology: Wharfedale's proprietary polypropylene/mica composite cones offer remarkable stiffness and low coloration, providing tight, articulate midrange and controlled low-end performance.
- Slim, Elegant Design: Compact for a floorstander, the Diamond 12.3 fits comfortably in modern living spaces, offering room-filling sound without overwhelming your décor.
- Advanced Crossover Network: Engineered with precision for optimal phase alignment and a balanced frequency response, ensuring natural, coherent sound at any volume.
- Beautiful Cabinet Finishes: Available in stylish finishes including Walnut, Black, White, and Light Oak — built with layered MDF for internal resonance control and stunning visual appeal.
Package includes a Free 3m pair of QED XT25 Pre-terminated speaker cables worth £89.95 (see below)
Specifications
Specifications
Mission 778x Specifications
General Description |
Stereo Amplifier, Digital-to-Analogue Converter |
Design Philosophy and Core Technology |
• Integrated Amplifier (45 watts @8 ohms, 65 watts @4 ohms) |
Inputs |
1 x Coaxial, 2 x Toslink Optical, 1 x PC USB, 1 x Bluetooth (aptX/AAC), |
Outputs |
1 x Coaxial, 1 x Toslink Optical, 1 x RCA (PRE Out) |
Sampling Frequency |
Optical / Coaxial: 44.1kHz-192kHz; |
Preamplifier Section |
|
Gain (max.) |
=A8I (Line), +47dB (Phono MM) |
Input Sensitivity |
540mV (Line, Volume = 0dB); 2.5mV (Phone MM, Volume = 0dB) |
Input Impedance |
10K (AUX); 47K//100pF (Phono MM) |
Total Harmonic Distortion (THD) |
<0.003% |
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; |
Total Harmonic Distortion (THD) |
< 0.001% (1KHz @ 0dBFS) |
Output level (0dBFS, 1KHz) |
2.1Vrms |
Power Amplifier Section |
|
Gain (max.) |
+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) |
Input Sensitivity |
540mV (RCA AUX In); 2.5mV (Phono MM) |
Signal-to-Noise Ratio (SNR) |
>108dB (ref. 45W, A-weighted) |
Crosstalk @1K |
>80dB (ref.1W) |
Standby Power Consumption |
<0.5W |
Headphone Amplifier |
|
Total Harmonic Distortion (THD) |
< 0.01% (1kHz, 50mW ) |
Output Impedance |
4.7 ohms |
Load impedance |
20-600 ohms |
General |
|
Dimensions (mm) (W x H x D) |
236x98x380.6 |
Carton Size (mm) ( W X H X D) |
450x392x175 |
Net Weight |
6.3kg |
Finish |
Black / Silver |
Power requirements (depending on region) |
220-240V ~ 50/60Hz; 100-120V ~ 50/60Hz |
Standard Accessories |
Power Cord, Remote Control, User Manual, Antenna |
Wharfedale Diamond 12.3 Specifications
Enclosure Type |
bass reflex |
Bass Driver |
5"(130mm) advanced PP Cone |
Mid-Bass Driver |
5" (130mm) advanced PP Cone |
Treble Driver |
1"(25mm) Textile Dome |
AV Shield |
No |
Sensitivity (2.83V @ 1M) |
89dB |
Recommended Amplifier Power |
30-150W |
Peak SPL |
102dB |
Nominal Impedance |
8Ω Compatible |
Minimum Impedance |
5.0Ω |
Frequency Response (+/-3dB) |
45Hz ~ 20kHz |
Bass Extension (-6dB) |
40Hz |
Crossover Frequency |
2.2kHz |
Dimensions (HxWxD) |
(925+50) x 180 x (320+28) mm |
Net Weight |
19.5 kg/pcs |
Delivery & Returns
Delivery & Returns
We offer free next day delivery on all orders over £99. For orders under £99 a delivery charge of £7.50 will be applied.
Delivery Times
Cut-off time for next day delivery is 3pm Monday-Friday and 1pm on Saturday. Items ordered after 3pm on Friday will be shipped on Saturday for Sunday delivery. Orders placed after 1pm on Saturday or on Sunday will be despatched on Monday for Tuesday delivery. (please allow an extra day if a bank holiday falls within this period).
If you would like your delivery on a specific day please call or email us with the details.
Our delivery partner DPD offers an interactive messaging service and will provide a 1-hour time window for your delivery so please provide a mobile phone number where possible.
Some items are not available on a next day delivery service, in these cases the selected product page will display the expected delivery time. If you would like to double check the delivery time prior to ordering please call 01932 851121 or email sales@weybridge-audio.co.uk.
* Remote and offshore locations are excluded from the free delivery service. For these locations we offer a standard 2-3 day delivery
service at £16 per item.
For more detailed info please see delivery information
Cancellations & Returns
At Weybridge Audio we want our customers to be happy with their purchase which is why we offer a 30-day no-hassle return policy on all products purchased through our website. If you would like to return an item please call us on 01932 851121 or email to sales@weybridge-audio.co.uk including your name, address, and original order number. The cost of returning an item is the responsibility of the customer unless the item is faulty in which case we will arrange to collect the faulty item at our expense.
Items must be returned to us in 'as new' condition, complete with all original packaging and accessories. Refunds will be processed within 5 days of receiving the item, subject to the above terms being met.
For more information please see our terms & conditions.