The Beresford Bushmaster MKII DAC was designed to overcome a number of technical challenges that DAC designers have been faced with for years, but without coming to a satisfactory or affordable solution. Some of those problems have been:
- grainy treble,
- weak and floppy bass,
- reliance on muting transistors or relays to mask signal noise when no music is playing.
- poor power supply noise rejection.
- high jitter
- overwhelming sibilance
- Listening fatigue
With more and more people switching to using a PC or media player to play music, or making use of the digital audio option from cable, Freeview, or satellite transmissions, the technical demand placed on DACs have increased. The Bushmaster has been designed from the ground up to overcome the difficulties in getting the best from digital cable and TV, PC or media player, and at the same time improving on the playback from the more traditional CD or DVD player.
The majority of DAC chips are used in circuit designs for use from 20Hz to 20KHz. But DVD audio can go down to 5Hz or lower. The Bushmaster now makes it possible to enjoy extended bass.
High accuracy crystal controlled receiver chip for low jitter.
Many agree that a low jitter ability heavily influences the performance of a DAC. The Bushmaster uses a crystal controlled receiver with one of the lowest jitter performance possible from a receiver chip. At 50ps few other DACs can match or surpass the Bushmaster in terms of jitter rejection.
Simple Filter Circuit.
There has been much debate as to how much damage is done to the audio signal by the various digital and analogue filtering networks that are found in a DAC design, and whether filters contribute to grainy high frequencies. The technology used in the Beresford Bushmaster relies instead on a simple HF analogue filter that operates outside any feedback circuit and outside the audio spectrum. This makes the Bushmaster less prone to anti aliasing filter residues and noise, and produces a far cleaner and detailed treble response.
High Current Class A-B headphone circuit.
The ever increasing popularity of larger cones in headphones has put new demands on headphone amplifiers. Larger cones require a larger current drive capability from the headphone circuit in order to reproduce bass frequencies with depth and impact.
The new generations of high-end headphones in particular have up to now only been able to operate properly on expensive stand-alone headphone amplifiers. The Bushmaster in built headphone amplifier is designed to drive even the latest range of high-end headphones and reproduce musical detail that these headphons are capable of.