ART MPA II Mic Preamp USED

This ART MPA II is USED in excellent condition used in a smoke free home studio.

The Pro MPA II from ART is a 2-channel microphone preamplifier that delivers a total of 70dB of gain, and can operate in either stereo or dual-mono mode. Perfect for any sized studio, production facility, or live sound environment, the preamp provides variable input impedance, and a dual-tube gain stage with selectable plate voltages (high or normal).

The unit has the ability to process a mid/side microphone set-up, and can also function as a dual-channel DI box using the 2 front panel instrument inputs. Two backlit VU meters display output level, while multi-colored LED arrays provide a visual reference of tube gain for each channel. The Pro MPA II is rack mountable and housed in a sturdy, 2U steel chassis.

2-channel, variable input impedance microphone preamplifier

Tube based gain stage with selectable plate voltages

Instrument input on front panel with automatic input selection

Selectable Stereo/Dual operation of output controls

Variable low-cut filter per channel

Switchable +48V phantom power per channel

Supports Mid/Side miking technique

Large, dual, back-lit VU meters

Phase reverse per channel

Switchable for either +4dBu or -10dBV output

ART PRO MPA II Specs

Number of Channels	2
Inputs	2 x XLR 2 x 1/4" TS phone Instrument (front panel)
Output	2 x XLR 2 x 1/4" TRS phone
Phantom Power	+48VDC, individually switchable
Multi Function	No
Gain Range	70dB
Maximum Output Level	+27dBu
Frequency Response	15Hz to 48kHz, +0/-1dB @ normal plate voltage 15Hz to 120kHz, +0/-1dB @ high plate voltage
Noise	EIN: -129dBu, A-weighted
Power Requirements	105~125VAC, 60Hz
Dimensions	19 x 8.75 x 3.5" (483 x 222 x 89mm)
Weight	10.5 lbs (4.7kg)
Specialties	Microphone impedance variable from 150Ω to 3kΩ Supports Mid/Side microphone recording

Packaging Info

Package Weight	13.4 lb
Box Dimensions (LxWxH)

UPC: 840402018360

In accordance with California labeling requirements:

WARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov

$300.00

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DBX 676 Tube Mic Pre Channel Strip

The Pedigree of Professional Audio.

dbx Professional Products are proud to introduce the all new 676 Tube Mic Pre Channel Strip. The 676 represents all of the best of dbx’s more than 40 years of dynamics processing.

The 676 offers a pristine high-voltage, Class-A tube preamp section that runs on 250 volts, so your signal can be as crystal clean or dirty as you need it to be. The 676 also incorporates the compressor/limiter design from the highly-sought after dbx162SL, as well as a 3-band parametric EQ with sweepable mids.

The 676 provides audio professionals with the perfect channel strip for recording and live applications alike with its military-grade build, vintage-inspired controls and VU metering.

Features

Class-A Vacuum Tube Preamp with High Voltage Gain
High-Visibility Vintage VU Meter
Compressor designed from the dbx162SL
3-Band Semi-Parametric EQ
1/4” and XLR Inputs and Outputs
Front Panel Instrument Input
Side Chain Insert

Specifications

Mic Preamp Connector	Female XLR Pin 2 Hot; Electronically balanced/unbalanced
Mic Preamp Input Impedance	1.9 kΩ
CMRR	>85 dB from 20 Hz to 3 kHz, >70 dB from 3 kHz to 20 kHz
Instrument Input Connector	Tip-Sleeve ¼” Jack
Input Type	(instrument) Unbalanced
Instrument Input Impedance	500 k Ω
Max Input	(instrument) +21dBu unbalanced
Preamp Insert Connector	Tip-Ring-Sleeve ¼”, RF filtered
Preamp Insert Type	Unbalanced, Tip = send, Ring = return
Line Outputs (Preamp & Compressor/Limiter) Connector	Male XLR and Tip-Ring-Sleeve ¼” (Pin 2 and Tip hot)
Line Outputs (Preamp & Compressor/Limiter) Type	Servo-balanced/unbalanced
Line Outputs (Preamp & Compressor/Limiter) Impedance	Balanced 30 Ω, unbalanced 15 Ω
Line Outputs (Preamp & Compressor/Limiter) Maximum Output Level	> +21 dBm (into a 600 ohm load)
Compressor Sidechain Insert Connector	Tip-Ring-Sleeve ¼”, RF filtered
Compressor Sidechain Insert Type	Unbalanced, Ring = output, Tip = input
Compressor Sidechain Insert Impedance	1 kΩ (output), 50 kΩ (input)
Vacuum Tube Type	12AU7A / ECC82
Vacuum Tube Grid Power Supply	+250V DC
Vacuum Tube Heater Power Supply	+12V DC
Frequency Response (Mic Input)	20 Hz to 50 kHz, +0/-1dB, 40 dB gain
Frequency Response (Instrument Input)	30 Hz to 70 kHz, +0/-1dB, unity gain
THD + Noise (Mic In to LIne Out)	0.25% typical at 0 dBu out, 1 kHz, 40 dB gain
THD + Noise (Instrument In to Line Out)	0.2% typical at 0 dBu out, 1kHz, unity gain
Equivalent Noise Level	Typically > -123 dBu with a 150 Ω source load, 22 Hz to 22 kHz
Noise Floor	Mic Insert to Comp Output: <-93 dBu, unity gain, EQ flat and no gain reduction
Preamp Function Switches/Controls: Instrument Input	Selects between microphone XLR input and front panel ¼” instrument input
Preamp Function Switches/Controls: +48V	Sends +48 VDC through 6.81 kΩ resistors to pins 2 and 3 of the microphone input
Preamp Function Switches/Controls: 20dB Pad	Attenuates the microphone input by 20 dB
Preamp Function Switches/Controls: Polarity Invert	Reverses pins 2 and 3 of the microphone input XLR
Preamp Function Switches/Controls: 80 Hz Low Cut	Enables an 80 Hz, 12 dB/octave high pass filter in the microphone and instrument signal path
Preamp Function Switches/Controls: Gain Control Range	-∞ to +55 dB for Microphone Input; -∞ to +40 dB for Instrument Input
Preamp Function Switches/Controls: Post Tube Attenuation	-∞ to 0 dB
Preamp Function Switches/Controls: Peak Indicator	Illuminates RED when the Preamp is within 3 dB of clipping
EQ Low Frequency	100 Hz, Low-pass shelving filter
EQ High Frequency	10 kHz, High-pass shelving filter
EQ Mid Frequency	Sweepable from 100 Hz to 8 kHz
EQ Function Switches/Controls: Narrow	Selects the “Q” of the MID Frequency EQ. “OUT” position Q = 0.9; “IN” position Q = 2.9
EQ Gain	(All Bands) Sweepable from –15 to +15 dB
Compressor Threshold Range	-40 dBu to +20 dBu
Compressor Threshold Characteristic	Selectable OverEasy™ or Hard Knee
Compressor Ratio	Variable 1:1 to ∞:1; 60 dB maximum Compression
Compressor Attack/Release Modes	Selectable Manual or Auto
Compressor Manual Attack Time	Scalable program-dependent; Typically 400 dB/msec to 1 dB/msec
Compressor Manual Release Time	Scalable program-dependent; Typically 4000 dB/sec to 10 dB/sec
Compressor Auto Attack Time	Program-dependent, typically 15 ms for 10 dB, 5 ms for 20 dB, 3 ms for 30 dB
Compressor Auto Release Time	Program-dependent, typically 120 dB/sec
Compressor Output Level Control Range	-20 dB to +20 dB
Compressor Peak Indicator	Illuminates RED when the Compressor/Limiter is within 3 dB of clipping
Limiter Type	dbx PeakPlus™
Limiter Threshold Range	-4 dBu to + 22 dBu (off)
Limiter Ratio	∞:1
Limiter Attack and Release	Program-dependent
Power Supply	Universal switch-mode
Operating Voltage	100 – 240 VAC, 50/60 Hz
Power Requirements	20 Watts
Fuse	T2.5AL 250V
Turn-On Time	Approximately 2 seconds
Dimensions	3.5”H X 19”W X 8”D (88.9mmH X 482.6mmW X 203.2mmD)
Weight	8.1 lbs (3.7 kg)
Shipping Weight	11.0 lbs (5.0 kg)

UPC 691991000416

In accordance with California labeling requirements:

WARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov

$999.95

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Earthworks 1021 Microphone Preamp

Earthworks was formed by David Blackmer, the inventor of dbx, to realize his vision of upgrading the entire audio chain to new standards of sonic realism. To that end, the unit is currently the quietest preamp available, particularly evident when high gain is used in recording classical music.

The ZDT Zero Distortion Preamplifier™ series is based on discrete circuitry designed by David Blackmer, establishing a new standard of sonic excellence in electronics. This exacting new standard provides frequency response from 1Hz to 200kHz +0.5dB, a rise time of 0.27 microseconds and distortion of less than 1 part per million (0.0001%), eliminating all possibility of sonic degradation. These preamps are so fast, so clean and so transparent that you don’t even know they are there. It is like plugging your microphone into a “piece of wire with gain”. You will hear clarity and detail with the ZDT preamps that is not available in any other preamp at any price.

Features:

Zero Distortion – less than one part per million
High output level +30dBu
Very low output impedance will drive long lines without interference or signal loss
True 48 volt phantom, polarity reverse & clip indicator
Separate XLR & 1/4” Phone (t-r-s) outputs, each with its own gain/level controls
1/4” phone connector output will drive balanced or unbalanced inputs
Full differential (balanced) from XLR in to XLR out – no internal conversion to single-ended
All discrete components; Class A amplification (no ICs in the signal path)
Greater transparency with minimum signal path and minimum features

Specs:

Preamp Type: Solid State
Number of Channels: 1
Frequency Response: 2Hz to 100kHz ±0.1dB, 1Hz to 200kHz ±0.5dB
Impulse Response: 1.4µs
Distortion: XLR out: less than 1ppm (0.0001%); 1/4” out: 0.001%
Input Noise: 1.6nVHz½ at 20dB gain; 0.6nV/Hz½ at 60dB gain
EIN: -132dBV at 20dB gain; -143dBV at 60dB gain
Slew Rate: 22V/µs
Output DC Offset: ±1 mV typical, servo balanced
Power Requirement: 120V AC (100V and 200-240V versions available)
Input: 1 XLR Female balanced transformerless
Input Impedance: 10KΩ phantom on, 100KΩ phantom off
Outputs: 1 XLR Male balanced transformerless (stepped)
1 ¼” TRS XLR Fem. balanced transformerless (variable)
Dimensions: Half rack space 1.75” x 8.75” x 10.375”
Weight: 4 lb. (1.8kg)

UPC: 827517112121

In accordance with California labeling requirements:

WARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov

$1,479.00

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Focusrite ISA Two Dual Microphone Preamp in a Single Rack Space

The Focusrite ISA Two is a dual mono microphone preamp featuring transformer based microphone inputs with variable input impedance. Based on the legendary designs found in the Focusrite Forte and Studio consoles, the preamps provides up to 80 dB of gain, while two front panel instrument inputs allow for immediate access to two transparent DIs.

The microphone inputs feature a pair of Lundahl LL1538 transformers with a 3-section winding that results in very low leakage inductance, along with an extended frequency response. To shield them from stray magnetism, each is encapsulated in mu-metal cans. Each channel has a fully-balanced insert point, activated using a front-panel button, making it easy to insert a choice of outboard EQ, a compressor, or limiter.

Microphone Input Transformer

Includes Lundahl LL1538 input transformers, originally chosen by Rupert Neve for the ISA 110 and one of the best microphone input transformers available
Zobel network in the ISA circuit (perfected by Rupert Neve) allows the microphone preamp to maintain an extremely flat frequency response across a very wide bandwidth

Gain

Offers up to 80 dB of clean, distortion-free gain
ISA topology ensures low-noise even at the highest gain levels
The transformer supplies 20 dB of gain, while the ISA's input stage offers up to 60 dB of additional gain on the microphone input

Variable Input Impedance

Four choices of input impedance, including the original ISA 110 value, allow for matching the preamp to a different microphones, even a vintage type, for the best possible sound
Impedance is selected using a switch on the front panel
Impedance choice is remembered even when the unit is switched off and back on

User-Calibrated Metering

Each channel has an eight-LED array to clearly display the level of the two signals
Line up the analog levels with digital converters or a DAW by using the calibration knob on the rear panel
Calibration avoids clipping on input

Instrument and Line Inputs

Two 1/4" TS connectors on the front panel provide access to a transparent DI input
TRS line inputs are available on the rear panel and a front panel switch allows for stepping through them to instantly select required input

Variable High-Pass Filter

Smooth-sounding, built-in 18 dB/octave high-pass filter per channel
Same design as the original ISA 110 module
Ideal for cutting out rumble, thumps and other unwanted low-frequency sounds using the 16 Hz to 420 Hz range
Easily accessed with a large knob and illuminated button

Balanced Inserts

Each channel has its own balanced insert point via 1/4" TRS send and receive connectors
Allows for a choice of signal processor to be connected and switched in and out using the illuminated switch on the front panel

Specs:

Number of Channels	2
Multi Function	No
Inputs	2 x 1/4" TS phone Instrument (front panel) 2 x XLR Microphone (rear panel) 2 x 1/4" TRS phone Line (rear panel) 2 x 1/4" TRS phone Return (rear panel)
Input Impedance	Mic (@ 1 kHz): Low = 600Ω, ISA 110 = 1.4Ω, Medium = 2.4Ω, High = 6.8 kΩ Line: 10 kΩ from 10 Hz to 200 kHz Instrument: >2 MΩ
Maximum Input Level	Mic: +7 dBu with a THD+N <0.7% at 1 kHz measured at 0 dB of gain with 150Ω source impedance and 22 Hz to 22 kHz band-pass filter
Outputs	2 x XLR 2 x 1/4" TRS phone Send
Maximum Output Level	+24 dBu with a THD+N <0.01% at 1 kHz measured with 150Ω source impedance and 22 Hz to 22 kHz band-pass filter
Phantom Power	+48V, individually switchable
Gain Range	Mic: 0 dB to +60 dB in 10 dB steps, plus 0 dB to +20 dB continuously variable trim Line: -20 dB to +10 dB in 10 dB steps, plus 0 dB to +20 dB continuously variable trim Instrument: +10 dB to +40 dB continuously variable trim
Frequency Response	Mic @ minimum gain (0 dB): 10 Hz to 135 kHz, -0.5/1 dB Mic @ +60 dB gain: 10 Hz to 115 kHz, -6/-1 dB Line @ unity gain (0 dB): 10 Hz to 80 Hz, -0.3/-1 dB Instrument @ minimum gain (+10 dB): 10 Hz to 115 kHz, -0.1/1 dB Instrument @ maximum gain (+40 dB): 10 Hz to 110 kHz, -2.5/1 dB ¹ Please Note: Relative to 1 kHz close
EIN	-127 dB (60 dB of gain with 150Ω source impedance and 22 Hz to 22 kHz band-pass filter)
Noise	Mic: -97 dBu @ output with unity gain (0 dB) and 22 Hz to 22 kHz band-pass filter Line: -97 dBu @ output with unity gain (0 dB), measured with 50Ω source impedance and 22 Hz to 22 kHz band-pass filter Instrument: -95 dBu, minimum gain (+10 dB) with 22 Hz to 22 kHz band-pass filter
Signal to Noise Ratio	Mic: 121 dB, with +24 dB maximum output (150Ω source impedance and 22 Hz to 22 kHz band-pass filter) Line: 121 dB, with +24 dB maximum output (50Ω source impedance and 22 Hz to 22 kHz band-pass filter)
THD + N	Mic: <0.0007% @ 1 kHz (-20 dBu input signal with +30 dB gain and 22 Hz to 22 kHz band-pass filter) Line: <0.002% @ 1 kHz (0 dBu input signal with +10 dB gain and 22 Hz to 22 kHz band-pass filter)
CMRR	Mic Input @ 60 Hz: -94 dB, with +24 dBu maximum output Mic Input @ 10 kHz: -91 dB, with +24 dBu maximum output
Crosstalk	Mic: -85 dB (I/P = 0 dBu, gain = 0 dB @ 1 kHz input to channel A, channel B output) Line: -91 dB (I/P = 0 dBu, gain = 0dB @ 1 kHz input to channel A, channel B output)
Power Requirements	100~240 VAC, 50/60 Hz
Dimensions (WxDxH)	19 x 11 x 1.7" (480 x 280 x 44 mm)
Weight	8.2 lb (3.7 kg)
Specialties	18 dB per octave (3-pole) high-pass filter, continuously variable from 16 Hz to 420 Hz (-3 dB)

In accordance with California labeling requirements:

WARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov

$799.99

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focusrite/focusrite-octopre-front_back.jpg

Focusrite Scarlett OctoPre - Microphone Preamp w/ADAT Outputs

The Focusrite Scarlett OctoPre is designed to connect with existing interfaces, supplying them with an additional eight mic pres, eight balanced inputs, eight line outputs, and analog to digital conversion at 192 kHz via ADAT outputs. The mic pres are the same found in 2nd-generation Scarlett interfaces, and thus, comprise a suitable solution for expanding the input array of an existing Scarlett rig. The OctoPre also sports two combination inputs on the front panel that accommodate the 1/4" outputs of instruments, giving you the ability to plug a guitar or a bass straight into the device. Pads on every channel allow you to capture the sound of high-level sound sources (drumkits, for instance), and 48V phantom power can be instantiated to give condenser microphones their necessary juice.

These features, combined with the word clock sync I/O and 5-segment LED metering, render the unit quite suitable for use in the studio. But that's only one of its intended uses: the Scarlett OctoPre also operates well in live-sound conditions, providing eight additional preamps for the stage, all feeding their respective line outputs so they can feed a multitude of mixers, consoles, and PAs. You can even use the line outputs to feed a console while simultaneously recording digitally via the ADAT outputs. As with other items in the Scarlett series, the OctoPre ships with included software, giving you access to the Focus Red 3 plug-in suite, as well as the Softube Time & Tone bundle.

Notable Features

Eight 2nd-generation Scarlett mic preamps
Eight balanced line inputs
Focusrite A-D conversion up to sample rates of 192 kHz
Dual front-panel instrument inputs
Pad on every channel for extra headroom - ideal for loud sources such as drums
Eight balanced line outputs, suitable for live use
Accurate 5-segment LED input metering
ADAT connectivity via optical cables
48V phantom power available on every channel for condenser mics
Included software bundle (Focusrite Red 3 and Softube Time & Tone Bundle)
Digital clocking with Word Clock I/O and JetPLL jitter elimination

Tech Spec

Supported Sample Rates

44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz

Microphone Inputs

Frequency Response	20Hz - 20kHz +0.5/-1.5dB
Dynamic Range	109 dB (A-Weighted)
THD+N	<0.001%
Noise EIN	-127 dBu
Maximum input level (without pad)	+8 dBu
Maximum input level (with pad)	+16 dBu
Gain Range	50 dB
Input Impedance	3 kΩ

Line Inputs

Frequency Response	20Hz - 20kHz +0.5/-1.5dB
Dynamic Range	109 dB (A-Weighted)
THD+N	<0.002%
Maximum input level	+22 dBu
Gain Range	50 dB
Input Impedance	49 kΩ

Instrument Inputs

Frequency Response	20Hz - 20kHz +0.5/-1.5dB
Dynamic Range	108 dB (A-Weighted)
THD+N	<0.01%
Maximum input level	+13 dBu
Gain Range	50 dB
Input Impedance	1 MΩ

Line Outputs

Maximum Output Level (0 dBFS)	+16dBu @ 0dBFS, or >21dBu where ADAT output is not used
THD+N	<0.001%
Ouput Impedance	136 Ω (Balanced)

UPC: 815301008491

In accordance with California labeling requirements:

WARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov

$439.99

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Focusrite Scarlett OctoPre Dynamic 8-Channel Microphone Preamp

The Focurite Scarlett OctoPre Dynamic is an eight-channel preamp and interface suitable for expanding the input array of any studio, and also, for use on stage. Connections are secured via eight combination inputs, each one giving you jacks that accept 1/4" and XLR cables. Two of the inputs can handle Hi-Z instruments as well, allowing you to plug in guitars and basses. Eight 1/4" line outs are also available via the rear panel. Also provided are eight channels of AD/DA conversion up to 192 kHz. This feature, combined with the unit's back-panel ADAT I/O section, renders the Scarlett OctoPre Dynamic quite suitable for expanding the input and output capability of interfaces such as the Scarlett 18i8, 18i20, or indeed, any interface connectable via ADAT.

As its name suggests, the Scarlett OctoPre Dynamic provides a compressor on each individual input—more specifically, a soft-knee VCA compressor operated by a signal knob. You can use this compressor in transparent mode for a more natural transient-taming response, or depress the More button to achieve a more noticeable sound out of the compressor. Along with the dynamic controls, the high-headroom, 2nd-generation Scarlett mic preamps render the unit suitable for recording loud sound sources, such as drums.

48V phantom power is available to power condenser microphones, as is a sample-rate selection button, a word clock sync button, instrument mode button, and more—all controllable from the front panel. 5-segment LED input metering provides an accurate readout of your levels. With its flexibility in accepting/routing signal via ADAT or analog connection points, you'll find this device useful in both studio and live environments.

Key Features at a Glance

Eight 2nd-generation Scarlett mic preamps
Analog compression on every channel
Eight balanced line inputs
Focusrite precision AD/DA conversion up to sample rates of 192 kHz
Two front-panel instrument input controls
Pad-induced headroom for tracking loud sources such as drums
Eight balanced line outputs - suitable for live use
5-segment LED input metering
ADAT connectivity via optical cables
48V phantom power available on every channel for condenser mics
Digital clocking with Word Clock I/O and JetPLL jitter elimination
Included Softube Time and Tone bundle (software)
Included Focusrite Red 3 plug-in suite

Tech Spec

Supported Sample Rates

44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz

Microphone Inputs

Frequency Response	20Hz - 20kHz +0.5/-1.5dB
Dynamic Range	107 dB (A-Weighted)
THD+N	<0.002%
Noise EIN	-127 dBu
Maximum input level	+13 dBu
Gain Range	50 dB
Input Impedance	3 kΩ

Line Inputs

Frequency Response	20Hz - 20kHz +0.5/-1.5dB
Dynamic Range	107 dB (A-Weighted)
THD+N	<0.002%
Maximum input level	+21 dBu
Gain Range	50 dB
Input Impedance	64 kΩ

Instrument Inputs

Frequency Response	20Hz - 20kHz +0.5/-1.5dB
Dynamic Range	107 dB (A-Weighted)
THD+N	<0.015%
Maximum input level	+13 dBu
Gain Range	50 dB
Input Impedance	1 MΩ

Line & Monitor Outputs

Dynamic Range (Line Outputs)	109 dB (A-Weighted)
Maximum Output Level (0 dBFS)	+16 dBu
THD+N	<0.001%
Ouput Impedance	136 Ω (Balanced)

UPC: 815301008507

In accordance with California labeling requirements:

WARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov

$649.99

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PreSonus DigiMax D8 8-Channel Microphone Pre w/ Digital Outputs

The DigiMax D8 is an 8 channel preamplifier featuring 8 award-winning class A XMAX mic preamps with 24-bit ADAT digital output. All eight preamps include variable trim control, 48V phantom power, ultra-fast acting LED metering and 20 dB pad. In addition, 2 instrument inputs are located on the front panel for direct Hi-Z instrument input. Balanced TRS direct analog outputs are located on the rear panel for routing and flexibility. The DigiMax D8 also includes word clock sync input for ultra-low jitter and robust synchronization.