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BorderPatrol Digital to Analogue Converter

The starting point for the BorderPatrol DAC was to make a DAC that sounds natural, open and organic. Too many digital audio products sound processed, unnatural and uninvolving and this is particularly true of the new generation of hi-resolution DAC's based on delta-sigma DAC technology. The most natural sounding DAC’s are NOS (no over-sampling) designs based around the ‘old technology’ R-2R resistor ladder chips. When correctly implemented designs like this can sound refreshingly natural and organic.

'I cheerfully confess that this DAC has been the most entertaining thing to hit my rack in years.
The performance easily earns the BorderPatrol DAC SE an Editor’s Choice award,
but also puts it firmly into Best of the Year territory. An absolute must-listen.'
Scot Hull, Part Time Audiophile

'Right away I knew the BorderPatrol wasn't just another digital converter;
there was more life, more body and soul to the sound of files.'

'Once I stopped comparing and just listened, I fell in love with the sound.
BorderPatrol has a musicality that you just don't get from everyday digital gear.'

Steve Guttenberg C-Net

The Phillips TDA1543 R-2R DAC chip is the heart of the BorderPatrol NOS DAC. It is used without digital filtering and over-sampling and also without an Op-Amp output buffer, another source of the unnatural sound that plagues most digital to analogue converters.
Numerous USB input chips were auditioned before deciding upon the CM6631A as the most musical.
The SPDIF version of the DAC features a DIR9001 SPDIF receiver chip.

Not surprisingly given that it’s a BorderPatrol design, the power supply design received a lot of attention. After a long development process a hybrid tube/solid state design using choke input filtering was found to be the most musical, dynamic and organic. BorderPatrol is the only company that applies tube rectification and choke input filtering to digital circuits.

The DAC is housed in a copper case chosen for it's rich, lustrous sound quality.

Prototypes of the DAC have been used at numerous shows to great acclaim with the audio press commenting on its open and natural sound.

Available as USB only (with SPDIF OUTPUT), SPDIF only or switchable USB and SPDIF. The USB version of the DAC also features a SPDIF output which enables it to function as a very high quality USB to SPDIF converter.

My budget-favorite (~$1,000) is from BorderPatrol, whose “entry-level” DAC certainly doesn’t sound entry-level. It has to be one of the most wild and open-sounding I’ve ever come across — and by “open sounding”, I mean, “makes most other DACs sound broken”. It’s a little breathtaking, really, but never in that fatiguing kind of way.
Scot Hull Part Time Audiophile

For all enquiries please contact: Gary Dews
Tel/Fax: +1 301 705 7460     
E-Mail bp@borderpatrol.net

BorderPatrol Audio Electronics c/o Kaja Music Systems Waldorf  Maryland  USA

Available with asynchronous USB input, SPDIF input or switchable USB and SPDIF.

The USB version of the DAC features a SPDIF
output which enables it to function as a
high quality USB to SPDIF converter.

R2R DAC chip which has no over-sampling (NOS), no digital filtering and no output buffering.

Plays files up to 24/96kHz via USB or SPDIF
including TIDAL Master recordings.

High quality signal capacitors couple the chip to the output of the DAC.
Copper metal chassis.

Tube/solid state hybrid choke input filter power supply featuring over-sized power transformers, high speed low noise diodes with resistor-capacitor snubbing, a high inductance choke and a EZ80 tube rectifier. It feeds both the USB/SPDIF and DAC cards which each have independent voltage regulation.

To our knowledge, BorderPatrol is the only
company applying tube rectification and
choke input filtering to digital circuits.

The SE version features a novel BorderPatrol twin transformer power supply system (as used in the BorderPatrol EXS amplifier PSU's), ELNA Cerafine power supply capacitor and film and foil signal coupling capacitors.

Dimensions: W x D x H: 9 x 7x 3in (226 x 173 x 78mm)
Weight: 6lb/3kg
 
Prices: S SE
USB or SPDIF only $995 $1350
USB and SPDIF (switchable) $1500 $1850

 

BorderPatrol DAC