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AMB Tube-Buffered DI
 
AMB Tube-Buffered Direct Injection Box:

The AMB Tube-Buffered D.I. Box extracts all the musical details of musical interfaces without degrading the sound. This can only be achieved by providing a very high input impedance to avoid any loading of the instrument pickups. A vacuum tube input stage achieves this high input impedance, and handles very high input levels without any compromise in sound quality. The outstanding Jensen JT-DB-E transformer provides a low impedance, balanced and ground-isolated output that is ideal for sending the signal to the mic preamp input of a console or, ideally, the M-1 mic preamp. Manufactured by AMB/Acoustic Consulting, Germany.

 

Features:

• Extremely high input impedance avoids signal degradation caused by excessive loading that is common in other designs.

• Buffered output jack allows for cable runs of 10 meters without losing high frequency information.

• Boost circuit increases signal sent to output transformer by 15dB for use with low output instruments or for distortion effects.

• Unity gain circuit feeds a low distortion unity gain signal to the output transformer providing the best possible sound quality.

• Two ground lift switches, one for complete isolation of post DI equipment and the other separates DI audio and chassis grounds.

• Road worthy construction, 2mm thick brushed stainless steel enclosure, 1.5mm thick end panels, internal parts mounted securely.

 

AMB Tube-Buffered DI Internal View
AMB Tube-Buffered DI Internal View
 
AMB Tube-Buffered DI Front Panel
AMB Tube-Buffered DI Front Panel
 
AMB Tube-Buffered DI Rear Panel
AMB Tube-Buffered DI Back Panel

 

Specifications:

Input Impedance >20M Ohms
Bandwidth 20Hz-20kHz (-0.1dB), 5Hz-120kHz (-3dB)
T.H.D. @ 0dBv Output 0.06%/20Hz, 0.04%/1kHz, 0.035%/20kHz
Signal To Noise Ratio 86dB
Vacuum Tube ECC83/7025, Military E83CC Optional
Output Transformer Jensen JT-DB-EPC
XLR Polarity Pin 2 Hot, AES/IEC/SMPTE standard, Internally Changeable To Pin 3 Hot
Maximum Input Voltage > 30V Peak-to-Peak
Output Impedance 180 Ohms @ 1kHz
Dimensions 185 x 100 x 40 mm
Operating Voltage 115VAC or 230VAC selectable from rear panel

 


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