| USB
AUDIO INTERFACE |
On
Sale
|
USB
AUDIO INTERFACE from Purebits
NOTE:
currently our soundcards are NOT ON SALE
This
page is here for information only
USB
Audio interfaces (2 models) are now available from Purebits.
They have been designed and manufactured for acoustics measurements
and Live Recordings purposes, but are excellent also for other
applications.
X4 - General Description
X2 - General Description
X2 and X4 - Features comparison
X2 and X4 - Prices and ordering
options
SHIPPING
HOW TO ORDER
X4
Model
X4
manual (PDF file)
Download
zipped X4
manual
Technical
specifications:
2
channel IN / 2 channel OUT USB soundcard (16 bit, up
to 48 kHz sample rate (*)),
compatible with all Windows versions (no driver required),
Linux and Macintosh.
High accuracy A/D and D/A converters from Burr-Brown.
Burr-Brown PCM2906 codec specifications:
DAC: THD+N 0.005%, SNR 96 dB, Pass-Band Ripple +/- 0.1 dB
ADC: THD+N 0.01%, SNR 89 dB, Pass-Band Ripple +/- 0.05 dB
(*)
The
soundcard can operate also at a sample frequency of 96 kHz,
but the audio bandwidth is limited to 22 kHz.
No
external power supply required. Powered by the USB port.
Very
robust anodized aluminum enclosure.
Compact size: 103 x 53 x 120 mm
2
x 10 Led VU-Meter bar graphs, for accurate input level
adjustment.
Can
be used as Preamplifier for Microphone and line levels.
The Input and output stages are realized using state-of-the-art
Burr-Brown operational amplifiers.
Burr-Brown OPA2353 specifications:
THD+N 0.0006%, very low noise 5nV/sqrt(Hz), Rail to Rail
I/O
4
x inputs, RCA connectors, mixable with stereo input JACK
connector. Input 1 and 3 are downmixed to USB input Left. Input
2 and 4 are downmixed to USB input Right. Suitable for Live
recording, using 2 or 4 microphones, and for acoustic measurements.
Separate
switchable phantom power supply (3,6 V) for channels
1/2 and 3/4, optimized for Panasonic WM6x series electret microphonic
capsules.
Input
level adjustment realized with high accuracy Cermet potentiometers.
Separate knobs for inputs 1/3 and 2/4.
Separate
Preamplifier/Monitor JACK stereo output.
Suitable for driving line or headphone loads.
USB
soundcard stereo JACK/2 x RCA output.
Suitable for driving line or headphone loads.
Line/Microphone
input gain switch.
Digital
Input / output. Coaxial and Optical.
Manual
selector switch for Coaxial or Optical input (the digital input
signal can be recorded only through USB, it is not buffered
to monitor output).
FRONT
VIEW - BLACK
Click
to zoom image
REAR VIEW - BLACK
Click
to zoom image
FRONT
VIEW - NATURAL
Click
to zoom image
REAR VIEW - NATURAL
Click
to zoom image
X2
Model
X2 manual (PDF file)
Download
zipped X2
manual
Technical
specifications:
2
channel IN / 2 channel OUT USB soundcard (16 bit, up
to 48 kHz sample rate (*)),
compatible with all Windows versions (no driver required),
Linux and Macintosh.
High accuracy A/D and D/A converters from Burr-Brown:
Burr-Brown PCM2906 codec specifications:
DAC: THD+N 0.005%, SNR 96 dB, Pass-Band Ripple +/- 0.1 dB
ADC: THD+N 0.01%, SNR 89 dB, Pass-Band Ripple +/- 0.05 dB
(*)
The
soundcard can operate also at a sample frequency of 96 kHz,
but the audio bandwidth is limited to 22 kHz.
No
external power supply required. Powered by the USB port.
Very
robust anodized aluminum enclosure.
Pocket size: 54 x 23 x 80 mm
Stereo
JACK Input connector.
USB
soundcard stereo JACK output.
Suitable for driving line or headphone loads.
Phantom
power optimized for Panasonic WM6x series electret microphonic
capsules (3,6 V). Fixed input gain.
Input
and output stages realized using state-of-the-art Burr-Brown
operational amplifiers
Burr-Brown
OPA2353 specifications:
THD+N 0.0006%, very low noise 5nV/sqrt(Hz), Rail to Rail
I/O
FRONT
VIEW - BLACK
Click
to zoom image
FRONT VIEW - NATURAL
Click
to zoom image
X2,
X4 - Features comparison:
|
Feature
|
X2
|
X4
|
|
Microphone
pre-amplifier
|
NO
|
YES
(variable gain, 34
dB)
|
|
Pre-amplifier
input
channels
|
-
|
4
|
|
Phantom
power for electret capsules
(3,6 V)
|
YES
(always active)
|
YES
(can be turned OFF,
separate switches for
IN 1-2, IN 3-4)
|
|
Vu-Meter
|
NO
|
YES
2
LED Bars (10
elements)
|
|
Pre-amplifier
gain limiter switch
|
-
|
YES
(max gain: 14 dB)
|
|
Soundcard
input channels
|
2
|
2
|
|
Soundcard
output channels
|
2
|
2
|
|
Input
connectors
|
Soundcard
input:
1 Stereo Jack
|
Soundcard
input:
1 Stereo Jack (IN 1-2)
Pre-amplifier:
4 RCA (IN 1-2-3-4)
|
|
Output
connectors
|
Soundcard
output:
1 Stereo Jack
|
Soundcard
output:
1 Stereo Jack
2
RCA
Pre-amplifier:
1
Stereo Jack
|
|
Digital
input
Coaxial
|
NO
|
YES
|
|
Digital
input
Coaxial
|
NO
|
YES
|
|
Digital
output
Optical
|
NO
|
YES
|
|
Digital
output
Optical
|
NO
|
YES
|
NOTE:
currently our soundcards are NOT ON SALE
From
Robert Thompson, USA:
It's
truly great! I have tried it out several times and each time
I'm blown away with how well it works, as well as the superb
recording it can make when coupled with inexpensive Panasonic
mic capsules!
|
