ART (Applied Research & Technology) Dual MP (Model 254) 2 Channel Tube Microphone Preamplifier

Design Overview

AR T’s Dual MP circuitry is a hybrid design utilizing the latest and most advanced solid state and tube technology. Using a transformerless design throughout, the Dual MP maintains exceptional signal integrity and extremely low noise. The Active balanced input utilizes a hybrid multiple paired transistor design providing extremely low noise and excellent CMRR. A second stage 12AX7A tube running on a regulated DC voltage of +50volts provides additional gain. The tube will overload before the input or output stage. This allows the user to manipulate the tube gain to meet their sonic requirements. The 1/4” input has a high impedance preventing the loading of any device connected to it, making the Dual MP perfect for DI applications.

Features

The A R T “SOUND”! - (not available elsewhere) Two independent channels of operation XLR balanced inputs and outputs

1/4” TS unbalanced inputs and outputs Hybrid- 12AX7/ quad transistor gain stages +48V Phantom power

Phase Reversal

20dB gain switch

Independent input and output level controls Four stage “sonic character” LED Array >60dB of gain

>100dB dynamic range

Internal power supply

Front panel instrument/ line input jacks All steel construction

Designed and manufactured in the USA

ART Dual MP Specifications

Dimensions:

Input Connections:

Output Connections:

Input Impedance: XLR, 1/4” Output Impedance: XLR, 1/4” Maximum Input Level: XLR Maximum Input Level: 1/4” Maximum Output Level: XLR Maximum Output Level: 1/4” CMRR

Frequency Response Dynamic Range

Total Harmonic Distortion(THD)

Maximum Gain: XLR to XLR 1/4” to 1/4” XLR to 1/4” 1/4” to XLR Equivalent Input Noise (EIN) XLR to XLR 1/4” to 1/4” Power Requirements:

figdestination.

1.75” Hx 19” Wx 6.5” D XLR (balanced), 1/4” unbal. XLR (balanced), 1/4” unbal. 2K ohms, 840K ohms

600 ohms, 300 ohms +14dBu

+22dBu

+28dBu

+22dBu

>75dB (typical @ 1kHz) 10Hz to 20kHz (+0, -1dB) >100dB (20Hz to 20kHz) <0.1% (typical)

70dB (typical) 54dB (typical) 64dB (typical) 60dB (typical)

-129dBu (‘A’ weighted)

-105dBu (‘A’ weighted)

95-125VAC, 10W - (USA)

Internal fuse