Bryston BDA-1 DAC £1950
8th Jan 2009 | 10:20
New high-end DAC from Bryston presses all the right buttons
Like several of the newer DACs on the market, the Bryston BDA-1 includes a USB socket for connection to a desktop or laptop computer, potentially turning a cheap bit of consumer electronics into a high-end server.
The USB socket is one of eight inputs, catering for all the usual flavours of interconnection except 192kHz sampling rate via dual AES sockets, something we admittedly can't recall seeing in a single domestic installation. And anyway, you can send such ultra-high sampling rates to the BDA-1 down a single cable.
On a piece of upmarket kit like this it's no surprise to find both unbalanced and balanced analogue outputs, but the digital output is a nice bonus, handy if, for instance, you run some sort of digital recorder or a digitally-fed slave system elsewhere in the house.
Like many DACs, the Bryston BDA-1 features upsampling of digital sources running at 96kHz or lower sampling rate and it's also possible to switch the upsampling off – of course the second stage of upsampling, within the DAC chips, is still active, but basically the upsampling option is an alternative digital filter.
Those DAC chips, by the way, are a pair of Cirrus CS4398s, as used in all sorts of DACs and CD players, some costing a good deal less than the BDA-1.
This may look like a bit of a cheek at first, but we entirely sympathise with Bryston's decision to use them: as with FM tuners, mass-market integrated circuits do such a good job that exceeding their performance would be a vastly complex and expensive operation.
DCS is a case in point here, its fabulous proprietary DACs starting at around four times the price of the BDA-1.
Top quality build
Instead, Bryston has concentrated on what comes before and after the DAC itself, which means the digital reclocking circuitry and the analogue output.
The former is a double-stage arrangement which is claimed to reduce jitter while locking rapidly to incoming digital streams even when their rate is on the border of what's acceptable, while the latter uses Bryston's own 'discrete Class A op-amp' circuits which have exceptionally low distortion, high slew rate and good cable-driving ability.
Along with the rest of the circuitry, they are assembled using surface-mounted components on the single audio circuit board, which runs the full width of the case, but uses less than half the depth – there's quite a lot a fresh air inside.
Power is taken from a pair of small encapsulated transformers followed by plenty of filtering and regulation. Build quality, as usual for Bryston, is beyond reproach and the sockets in particular are of commendably high quality.
One tends to approach a piece of kit like this with quite high expectations and we were encouraged to find them almost immediately fulfilled.
Having connected up the BDA-1 to the first CD player that came to hand – nothing fancy – we used it first to listen through some newly arrived recordings that had come in for quality monitoring purposes for a record label. That meant that the recordings themselves were unfamiliar, so a highly positive overall reaction boded well for them as well as the Bryston BDA-1.
In fact, we were really most impressed, not only with the general degree of tonal purity and detail exhibited, but also with the unusual degree of what, for want of a better word, we'll call 'polish' on the sound.
That could be taken as a very back-handed compliment, if read in the sense that rough edges have been polished out or otherwise sweetened, but that's certainly not the case here – the recordings in question, being orchestral, have plenty of natural instrumental tone including the bite of bow on string and the rasp of loud brass instruments.
But somehow there seems to be a burnished quality to the sound, which we aren't accustomed to hearing often from recordings, though a good performance in a fine hall can certainly possess it. Details positively shone through, like a landscape in bright sunlight.
Curious as to how much of this (very welcome) finding was due to the DAC and how much to the recording, we resorted to a familiar mid-range CD player. Now the recording simply sounds good – it would probably be mean not to say very good, but it was not outstanding in the way we had first heard.
Reverting to the BDA-1 restores the original excellence, so it was no trick of a first impression. Still, this comparison was across nearly a four-to-one price differential, so could an alternative near-£2,000 DAC manage the same result? Not quite, turned out to be the answer. A DCS Elgar did, admittedly and, perhaps, manages a shade tighter bass too, but in this case the four-to-one ratio was the other way and, well, one would hope so!
This turned out to be probably the most marked example of what the Bryston BDA-1 can do, but across a wide range of recordings, both familiar and unfamiliar, it maintains a consistently high standard of resolution and realism, making the music practically leap out of the loudspeakers.
It has admirably even-handed tonal characteristics with particularly fine rendition of voices, maintaining the delicate balance between vowels and consonants without sibilance, chestiness or any of the other all-too-common misdemeanours and it extends effortlessly to the frequency extremes.
Bass has a lovely sense of weight but is still plenty lively, while high treble is open and spacious. Incidentally, it's good to report that these results hold via any of the digital input options, including USB when it is sourced in such a way as to be bit-perfect. Bryston seems to have nailed the problem of jitter very effectively in this unit.
There is a legitimate question over the value of any expensive DAC (or CD player, really) when devices such as the Cambridge DacMagic at one-tenth the price can achieve remarkably good results.
It would be ridiculous to claim that the Bryston BDA-1 is ten times as good, but if you are not afraid of the good old Law of Diminishing Returns there is certainly a rewarding step-up in quality from even the best budget units in a fine component like this.
As with so many things in life, the finest and rarest come at a price, but we think the arguments the Bryston BDA-1 makes for itself are exceptionally convincing.