In 1983 Mission launched its first integrated stereo amplifier. The 778 was a design of narrower width than typical hi-fi amps and was praised for the quality of its build and circuitry, the simplicity of its controls and its useful range of inputs, all at a relatively affordable price. Importantly, its adroitly balanced sound was a match for the musicality of which Mission speakers were already famed – that, of course, was Mission’s aim.
A year later, Mission launched the Cyrus brand – an offshoot for its amps and, eventually, other audio electronics – leaving Mission to focus solely on loudspeakers. For that reason, the 778 has remained the only integrated amp ever branded solely as a Mission product.
Fast forward to 2022 and Mission is ready to launch another integrated amp under its own banner. The new 778X has much in common with its forebear from 40 years ago – a compact, half-width design that ‘exudes simplicity and delivers a sound that belies its diminutive footprint’. Like the original it sports a useful range of inputs, albeit thoroughly updated to suit modern-day music lovers. And while its circuitry has been entirely redesigned to meet and exceed contemporary standards, the new amp is a match for Mission’s current range, just as the 778 was in its day.
Inputs for digital sources comprise asynchronous USB Type B and three S/PDIF sockets (one coaxial and two optical), while digital outputs are provided in optical and coaxial flavours. Analogue signals are catered for by three stereo RCA inputs – two line-level plus an MM phono input for turntables – while pre-out sockets permit the addition of an external power amplifier. Bluetooth reception facilitates wireless audio streaming from smartphones, tablets and the like, with support for multiple codecs including aptX and AAC.
The front of the amp sports a pair of smooth-acting rotary controls – one for source selection, the other for volume – surrounded by white LEDs to show current settings. Between these controls are the IR sensor, power button and 6.3mm headphone output – compact, uncluttered design with attractive symmetry, built and finished to a high standard, according to the maker.
Digital sources connected through the USB, coaxial and optical inputs, or paired for Bluetooth reception, take full advantage of the 778X’s built-in hi-res DAC. This is based around the ES9018K2M chipset from the Sabre32 Reference family, enabling the amp to benefit from ESS Technology’s 32-bit HyperStream architecture and Time Domain Jitter Eliminator to deliver excellent dynamic range and ultra-low distortion. Hi-res PCM is supported to 32-bit/384kHz, alongside DSD to 11.2 MHz (DSD256).
Though technically excellent, Sabre32 Reference DAC chips can be challenging to implement to maximum effect. If the circuitry that accompanies them is not of a sufficient standard, the resulting sound may appear hard and bright; treat them right, however, and the level of detail and musical expression these chips dig from the digital signal is captivating. One such critical element is the post-DAC active filter; Mission’s design team has paid great attention to this circuit, using op-amps that were specifically chosen for their synergy with the ES9018K2M.
Amp it up
The 778X’s power amp stage is a Class AB design incorporating a low-noise 200VA toroidal transformer. This is followed by 2x15000uF reservoir capacity (30000uF in total), helping to maintain firm control of the music whilst enabling excellent dynamic range. The amp’s output from its gold-plated speaker terminals is conservatively rated at 45W into eight ohms and 65W into four ohms – there’s plenty of power on tap to drive any speakers the amp is likely to be partnered with to high volume levels with consummate ease.
The preamp section is kept as simple as possible to maintain signal purity, with line input signals passing to a precision, microprocessor-controlled analogue volume stage. Much effort has gone into the physical layout of the 778X’s circuitry, protecting the sensitive preamp section from noise interference. This, plus the use of independent low-noise power supplies for all critical stages, helps the amp to excel sonically across all manner of digital and analogue sources.
Turntables and headphones
Vinyl lovers will appreciate the addition of a phono stage for moving magnet cartridges. This JFET-based circuit provides RIAA equalisation, adding to the amp’s already impressive format flexibility.
Headphone listeners are equally well served by the 778X’s dedicated headphone amp. With its current-feedback design and high slew rate, a dynamic and detailed performance with all manner of headphones is assured.
The 778X is an ideal amp to partner with a wide range of speakers, from models costing as little as £200 per pair to upmarket designs at several times that price. It isn’t designed to solely suit Mission speakers; but it does match them superbly!
To prove the point, Mission is promoting two package deals that combine the 778X with popular standmount models from its range, forming great-value, high-quality audio systems. The first includes a pair of Mission LX-2 MkII speakers at a package price of £649, saving £130 from the individual RRPs. The second upgrades the speakers to the Mission QX-2 MkII at a package price of £799, saving a total of £150. In both cases, the speakers are available in a choice of matt black, matt white or walnut.
The Mission 778X integrated stereo amplifier is available from December 2022 in a choice of silver or black, at an RRP of £549.