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Keyboards & Controllers » Primus a25

Powerful Gear for MIDI and Audio Recording

A combination MIDI controller and audio interface, the PRIMUS a25 comes conveniently equipped with MIC Preamp, Instrument Preamp, Line In/Out, Headphone Preamp and MIDI controllers, with complete control over MIDI and audio parameters. All this in a compact package that is powered by the USB bus. The JamMate PRIMUS a25: It's what you need to produce music on your computer.

Features

25-key MIDI keyboard controller with 16 channel MIDI I/O
24-bit / 96 kHz Audio interface
8 assignable MIDI controller knobs and encoders
Function keypads and a data wheel with 3 digit 7-segment LED display
5 fully-editable internal user banks
4 presets optimized for bundled demo software and 1 useful preset
Pitch bend and modulation wheels
Sustain pedal jack
2 line inputs (1/4" TS), 1 MIC input (1/4" TRS) and 1 Hi-Z input (1/4" TS)
2 line outputs (1/4" TS) / Headphone output with level control
Direct monitor switch for zero-latency monitoring
USB 2.0 bus powered
Additional 9V DC power socket
Supports WDM, ASIO, DirectSound and Core Audio driver with low latency
Native Instruments Pro53 DEMO, FM8 DEMO B4II DEMO and Battery 3 DEMO software included

Images

Primus a25 Box (above). Click to enlarge.

Primus a25 Box Contents (above). Click to enlarge.

Primus a25 angled view (above). Click to enlarge.

Primusa25 Close-Up (above). Click to enlarge.

Primus a25 Rear View (above). Click to enlarge.

Primus a25 Front View (above). Click to enlarge.

JamMate Primus

Top Panel (above)

JamMate Primus

Rear Panel (above)

Specifications

Analog Audio

1. Sample rate supports	44.1, 48, 88.2, 96 kHz
2. Analog Line Input	1) Input Type	Line input 1,2
	2) Connector Type	1/4" TS Phone jack
	3) Peak level	0dBFS @ +6dBV
	4) Programmable gain	-64dB ~ +24dB (0.5dB step size)
	5) Impedance	About 10K Ohm
3. MIC Input	1) Input Type	MIC input for dynamic microphone
	2) Connector Type	1/4" TRS Phone jack
	3) Preamp Gain	+60dB (TBD)
	4) Peak Level	0dBFS @ 20mV
	5) Programmable gain	-64dB ~ +24dB(0.5dB step size)
	6) Impedance	About 1K Ohm
4. Hi-Z Input	1) Input Type	High Impedance input for instrument
	2) Connector Type	1/4" TS Phone jack
	3) Peak level	0dBFS @ +0dBV
	4) Programmable gain	-64dB ~ +24dB(0.5dB step size)
	5) Impedance	About 1M Ohm
5. Analog Output	1) Output Type	Line Output 12
	2) Connector Type	1/4" TS Phone jack
	3) Peak level	+0dBV @ 0dBFS
	4) Attenuation	-64dB ~ +0dB(0.5dB step size)
	5) Impedance	Less than 30 Ohm
6. Headphone Output	1) Output Type	Headphone amplifier
	2) Connector Type	1/4" TRS(stereo) Phone jack
	3)Load Impedance Range	32-300 ohm (for the best performance)
	4) Output Power	60mW @ THD0.1% ; Vpp = 3.5V

Digital Audio

1. Sample rate supports	44.1, 48, 88.2, 96 kHz
2. A/D Converter	1) SNR	102dBA(0dB @ fs=48kHz)
	2) DR	102dBA
	3) THD	- 95dB(1kHz, -1dBFS)
	4) Interchannel Isolation	90dB
3. D/A Converter	1) SNR	108dBA(0dB @ fs=48kHz)
	2) DR	108dBA
	3) THD	-97dB(1kHz, 0dBFS)
	4) Interchannel Isolation	100dB

Interface

1. USB	1) USB Port	USB2.0 format
2. MIDI	1) MIDI in and MIDI out ports(DIN-5pin)

Hardware

Keyboard	25 Keys (with velocity)
Display	7 segments, 3 characters (LED)
Power Supply	9v 300mA (DC Adaptor) DC adaptor or USB Bus Power
Size (W) x (D) x (H)	16.93” x 10.04” x 0.28”	430mm x 255mm x 85mm
Weight	6.65lbs	3.02kg

Minimum System Requirements

PC
Intel Pentium 4 or equivalent and
compatible CPU
256MB of RAM
One available USB port
Microsoft Windows® XP or later

Mac
Macintosh with G4 or better
processor
256MB of RAM
One available USB port
Mac OS 10.3 or later

Resources

The following resources are available from the Infrasonic website.

Auzentech is a trademark of Auzentech, Inc. INFRASONIC, BLOW5, BLOW5D, BLOW4, BLOW4D, INFRASONIC DeuX, INFRASONIC AMON, INFRASONIC Quartet, and JamMate, and SIMS Audio are trademarks of SIMS Corporation. All other trademarks remain the property of their respective owners.