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Burl Audio

Burl B2 ADC $2499

The B2 Bomber two-channel analog to digital converter from Burl Audio may be the most significant piece of audio gear to add to your studio. You’ve invested in great mics, great mic preamps and monitors, but consider one other key component - an ADC with a superb audio path. Most DAW hardware interfaces are designed for interconnectivity first with little attention to the analog audio path.

The Burl B2 Bomber converter has great specs, but more importantly it's designed to give you the ultimate in recording tone. For years people have been trying to figure out why their digital recordings don’t have the warmth and feel of analog tape recordings. Even with tube mic preamps and great compressors there is still something missing. There is still a blurriness, graininess and lack of depth that comes with digital recordings.

By using a revolutionary hybrid circuit with a proprietary Burl Audio BX1 transformer and a discrete class-A, zero feedback, zero capacitor signal path, Burl has achieved dynamic and tonal balance.

The B2 isn't just for tracking. Mix down and mastering were the main focus of the B2′s layout and design. With 30 segment peak amplitude and RMS metering, the B2 lets you know exactly how hot you're running your signal, critical for mastering. The front-panel attenuator settings easily allow you to adjust input headroom depending on what the material calls for. Run the B2 Bomber input levels hot for creative saturation. Couple that with an extremely low jitter clock source, and you have the B2 Bomber ADC, the most significant piece of gear in your studio.

• 44.1k Hz to 192k Hz, 24 bit, 2 channel ADC
• Proprietary, high definition, BURL Audio BX1 transformer input
• All class A, discrete transistors signal path with zero feedback, zero caps
• Audiophile quality 6 position attenuator with standard headroom settings
• High definition metering with simultaneous RMS and peak indication
• Two AES and one SPDIF output with dual AES wire support
• BNC word clock input with two outputs of extremely low jitter clock
• Frequency response at 48kHz sample rate is 12Hz to 22kHz, +/- 0.1dB
• Frequency response at 96kHz sample rate is 15Hz to 46kHz, +/- 0.1dB
• Frequency response at 192kHz sample rate is 18Hz to 94kHz, +/- 0.1dB
• 120dB Dynamic Range (A- weighted), 117dB (no weighting)
• -100dB THD+N (+4dBU = -15dBFs)
• -94 dB THD+N (+18dBU = -1dBFs)
• Rugged & made in USA

 

Burl B2 DAC $2499

The B2 Bomber DAC is the result of tireless digital to analog research and development. The B2 Digital to Analog converter has unique class-A, discrete op-amps with passive filtering. This makes the B2 DAC ideal for monitoring.  Couple this with state of the art conversion technology and the B2 Bomber DAC delivers sonic purity and huge dynamics. The B2 DAC has punchy low end, 3D spaciality, a wide stereo spread producing amazing detail. Both the B2 ADC and B2 DAC feature identical low jitter clocking, precision metering and stepped attenuators.

• 44.1k Hz to 192k Hz, 24 bit, 2 channel ADC
• Proprietary custom design BOPA1, all discrete op-amps
• Passive filters
• All class-A
• Zero capacitor signal path
• Audiophile quality 6 position attenuator with standard headroom settings
• High definition metering with simultaneous RMS and peak indication
• Two AES and one SPDIF input with dual AES wire support
• BNC word clock input with two outputs of extremely low jitter clock
• Frequency response at 48kHz sample rate is 10Hz to 22kHz, +/- 0.1dB
• Frequency response at 96kHz sample rate is 10Hz to 30kHz, +/- 0.1dB, -0.3 dB @ 40kHz
• Frequency response at 192kHz sample rate is 10Hz to 30kHz, +/- 0.1dB, -1.5 dB @ 90kHz
• 115dB Dynamic Range
• -96 dB THD+N, full scale output = +18dBu
• Rugged & made in USA

 

Burl B80 Mothership Chassis - $2499

The B80 Mothership is the multi-channel version of Burl Audio’s critically acclaimed B2 ADC and DAC. The Burl Audio B80 Mothership AD/DA converter has an 80 channel capability. Using a card based system and heavy duty 4U chassis, it has 10 card slots with 2, 4 and 8 channel AD/DA cards, all with the B2 quality signal path.

Each ADC channel has a BX1 transformer and each DAC channel has the latest Burl Audio discrete op-amp, BOPA2, technology. Recording and playing back an entire band through 24 Burl channels is an experience!


With a completely configurable AD/DA, a converter for any situation can be realized. If you just mix, load up the B80 with 8 BDA8 cards for 64 channels of mind blowing fidelity. If you track live, 6 BAD4 cards will give you 24 B2 quality inputs, and 4 BDA8 cards gives you 32 channels of outputs.
Digital interconnect is also completely configurable, and controlled by a swappable motherboard. The BMB1 digital motherboard has two Digi-link connectors for direct hookup to Pro Tools. Burl does away with the expansion port, making both primary ports. That means you can play 64 DAC channels straight out of Pro Tools with one unit! No more cascading units with multiple word clocks. All channels can run off of one internal master clock. Good bye word clock generator! Of course if you do need more channels, multiple units run flawlessly with tight clocking.
The technology that makes this possible is the Burl BackBone. The Burl BackBone is a high bandwidth backplane delivering incredible digital audio throughput. The Burl BackBone also delivers large amounts of power to the analog sections. Master clock travels directly to each converter eliminating the need for individual PLLs.

Another digital card option is the BMADI (same price as Digi-Link version, choose one when ordering). Because each card slot can handle a single MADI card, an entire MADI switch matrix can be realized in one unit. Other future digital cards will include word clock distribution and time code sync for film and video.The B80 Mothership is the result of over five years of tireless research and development. The no compromise, no BS design strategy is immediately apparent in the build quality.

Configuring a B80 is a snap. All you do is slide the card down its card guide, snap it in the Burl BackBone, turn the hand screws, and you’re there. Configuration cards currently consist of the BMB1 with Digi-link, the BAD4, 4-channel ADC card, and the BDA8, 8 channel DAC card.

Powering the B80 Mothership takes some juice, so Burl designed the BP250 to drive 80 channels of class-A analog circuitry. With a 250 watt continuous power capability, and +/- 24 volt rails, a multi-channel AD/DA converter is finally getting the power it deserves.

For complete control of all of the B80 signal routing, and stand alone metering, a USB port has been included. This is not an audio interface, it's strictly for control. The flexibility of the B80 design allows for a smooth integration and upgrade path.

In this digital era, many yearn for the tone of records past, and analog tape is becoming a lost art. The B80 Mothership clearly bridges this analog to digital gap.


B80 Mothership Features:
• 4U main chassis
• BMB1 motherboard with 2 Digi-link connectors
• BMB2 MADI Motherboard MADI optical support
• 10 card slots
• All slots accept AD/DA, AES, MADI
• 2, 4, and 8 channel analog cards


BAD4 4-channel ADC card $1499 each
BAD4 Features:
• 44.1k Hz to 192k Hz, 24 bit, 4 channel ADC
• Exact same circuit path as B2 Bomber ADC
• Proprietary, high definition, BURL Audio BX1
transformer input
• All class A, discrete transistors signal path with zero feedback, zero caps
• 4 XLR connectivity

BDA8 8-channel DAC card $1799 each

BDA8 Features:
• 44.1k Hz to 192k Hz, 24 bit, 8 channel DAC
• Circuit path based on B2 Bomber DAC
• Latest Burl Audio BOPA2, OP-AMP
• All class A, discrete transistors signal path, zero caps


Upcoming Cards:
• BSUM, summing bus, summing all DAC outputs
• BCONTROL, control room monitor
• BMIC2, two channel mic pre / AD
• BSYNC, time code synchronization

 

Burl B1 MICROPHONE PRE AMP / DI $775

Burl B1D MICROPHONE PRE AMP / DI $775


Based on the API 500 series form factor, the Burl B1 mic preamp has the proprietary BX3 input transformer and BX2 output transformer, delivering warmth with depth and clarity. The B1D is the same as the B1 except that it has an all iron BX4 output transformer giving it a more terrifying(!) rock tone. An all discrete transistor, class-A, direct coupled, capacitor free circuit path, gives the B1 amazing punch on drums, beautiful tonality on guitars, and warmth with presence on vocals.


The B1 and B1D have Gain and Level controls. If you want heavy, gainy tone, crank up the stepped gain control and offset that with the level control. For cleaner tones, turn the gain down and turn up the output level. For ribbon mics and other low impedance sources, the B1 has a transformer coupled impedance select. The B1 gets the best out of any microphone, whether it be dynamic, condenser or ribbon.


Use the B1’s 1/4” instrument/line input on the front panel, plug in, crank up the gain and go. The PAD switch allows for hot signals and balanced line inputs through the mic XLR on the back panel. Run your tracks or mixes through the B1 for warmth and glue. The B1 was designed to rock. Run multiple B1 channels for your rhythm tracks and you are there.  Replace EQ and compression with true analog PHAT.
BURL custom BX3 input transformer
BURL custom BX2 nickel ( B1) or BX4 iron ( B1D ) output transformer
audiophile, discrete, class-A, direct-coupled, capacitor free circuit path
stepped gain control
independent output level control
70 dB gain
impedance select
1/4” front panel DI input
30 dB pad for hot signals and balanced line level input
phantom power
phase reverse
tri-colored gain level indication

 

 

 

 

 

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