A Designs MP-1A Mono Tube Microphone Preamplifier  

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12747416257837420
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There aren't many companies that can design and build one preamp that engineers and producers feel that they could make an entire record with. A-Designs Audio has built two. The all-tube MP-1A and the... Click To Read More About This Product

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Overview

There aren't many companies that can design and build one preamp that engineers and producers feel that they could make an entire record with. A-Designs Audio has built two. The all-tube MP-1A and the solid-state Pacifica, but we're here to talk about the MP-1A (you can check out the Pacifica later). With A Designs Audio's MP-1A, not only do you get a never-ending sweetspot and sonic majesty, it also gets top marks in "works and plays well with others." Meaning, while some preamps are picky when it comes to mics, the MP-1A welcomes all ” and sounds great no matter what you put through it ” ribbon, dynamic, or condenser. Better still, while the MP-1A falls squarely into the realm of "color" preamp, it never overwhelms a track with too much character. If you've been searching for an all-tube preamp with a rich bottom end, sweet and airy top end and enough tonal versatility to record all of your tracks without over-colorization at mixdown, think A designs Audio MP-1A.

A Designs Audio MP-1A, First Take:
True tube in, tube out mono mic preamp
World-class custom-wound transformers
Two "tone" switches, give you four unique tone signatures.
Audiophile quality and components and a price below comparable boutique preamps

True tube mic preamp

The MP-1A is a classic 1-channel tube mic pre based on the celebrated MP-1. It offers the same true tube in / tube out design, plus the same quality that made the original MP-1 and MP-2 the buzz of the professional audio industry. New features include a -20 db pad switch, two selectable tone switches for four possible tones, plus 60db of gain (perfect for next generation ribbon mics) Classic features include a world-class Cinemag input transformer coupled with a custom wound output transformer, delivering the low noise and top quality sound that you demand from a high-end, high-priced mic-pre. Additional features include a balanced combo XLR/1/4 inch input, a true VU meter, phantom power and phase reverse switches, and a front panel line level input jack.

Custom transformers, the key to punchy sound and quiet operation

A lot of preamp builders believe that transformers are things to be avoided, but in reality, they're responsible for the sound we prefer in rock/pop music. The trick is finding good ones. Bad transformers can ring or decimate the upper frequency range, but when a transformer is properly designed and built, such as those by Cinemag (who's lineage includes making transformers for the top consoles in recording history) they are a thing of beauty, delivering a full, punchy sound like no other. Plus, thanks to the superior electronic isolation of transformers, noise and hum is reduced. That's why you can overdrive an MP-1A and get rich, milky distortion without the extra noise. The transformers you find in A Designs Audio's preasmps are hand- and "ear-" built by Tom Reichenbach of Cinemag. Tom is the son of the designer of the legendary Quad Eight consoles, whose sound rivaled Neve and API consoles at one-tenth the price.

Tonal Versatility

With a lot of preamps, you'll find that they tend to have only one setting where you hear the magic. Move past it, and the magic is gone. The problem is that you can't always run it at that setting based on the strength (or lack of) of your input source. Then you have the A Designs Audio MP-1A all-tube, mono preamp. Thanks to its fixed-gain amplifier design (with input attenuator), you get consistent behavior whether the preamp is turned up or down. Add to this the fact that you have 2 "tone" switches that give you a palette of four unique, world-class sonic flavors, and you'll understand why we say you could make an entire record with just this one preamp.

Audiophile quality and sound made affordable.

Built to audiophile-quality standards with a price tag well below other boutique preamps in the same class, the MP-1A is a true tube preamp with no solid state components in the signal path. The MP-1A relies solely on tubes, film capacitors, and custom transformers. To maintain the integrity and purity of its sonic signature, bells and whistles are kept to a minimum. This serves two purposes. First, the more switches in the circuit path, the more sound quality can be negatively affected. Second, by keeping only necessary features, costs are kept down”and your money goes where it really counts”sound quality.

With the A Designs MP-1A has obviously succeeded in their mission "Pro audio made affordable." Here's what users are saying about the MP-1A:

"A welcome addition to the ranks of top-quality mic pres "

"Stunning sound quality with serious bass response and a warm, airy top end typical of great tube mic pres."

"Mr. Clean, with some bite...Comes through with warmth and transparency...a clean and airy high end"

To sum it all up, The MP-1A is a professional class preamp for use on a variety of sources that delivers warmth, transparency, and a quality sound with a clean and airy high end like only a high quality all-tube pre-amp can.


Features
  • EF86 Input Tubes
  • 6N1P Output Tubes
  • Cinemag Input Transformers
  • Custom Wound Output Transformers
  • VU Meters
  • Level Controls
  • -20dB Pad Switch
  • Polarity Switch
  • Phase Switch
  • Two Selectable Tone Switches
  • Custom Milled Face Plate
  • Solid Vented Metal Frame
  • 2UR
  • Toroid Power Transformer
  • XLR Input Connectors
  • XLR Output Connectors
  • 1/4 Inch Direct Injects
  • High Gain (60 dB)
Specifications
  • Input Impedance: 1.4k Ohm
    Gain Range: 60 dB
    Noise (EIN): -128 dB
    Mic Phantom Power: 48 Volt, Switchable
    Mic Input Phase: 0-180 Switchable
    Instrument Jack Input: rear XLR / front 1/4"
    Input Impedance: Min > 100k Ohm
    Balanced Output: XLR
    Output Impedance: 600 Ohm Switchable to 10k
    Maximum Level: +22 dBu
    Output: Low-Z, transformer-balanced
    Frequency Response: 28 Hz - 60k Hz
    Distortion (THD): > .08 @ 1 Khz
    Power Requirements: 100/120/230 VAC - 42 Watts
    Dimensions (W x H x D): 19" x 3.5" x 10" (482 x 89 x 254 mm)
    Weight: 18 lbs.(6.8 kg)
    Shipping Weight: 20 lbs (7.7 kg)
Warranty
MANUFACTURER'S WARRANTY
A Designs reserves the right to make improvements or changes at any time to this product. Warranty is void if opened by unauthorized personnel or enduser.

Published by: A Designs Audio
P.O. Box 4255
West Hills, CA 91304
U.S.A.

Edition 1.0 2005
Copyright 2005 A Designs Audio
All Rights Reserved.

1 Year Warranty Internal Parts, 30-Day Limited Warranty Labor

A Designs warrants that our hardware conforms substantially to the specifications contained in this manual when used in accordance these specifications for a period of 1 year from the date of original purchase from A Designs or its authorized dealers. In case of a valid warranty claim, your sole and exclusive remedy and A Designs' entire liability under any theory of liability will be, at its option, to repair or replace the product without charge, or, if not possible, to refund the purchase price to you. The warranty is not transferable and applies only to the original purchaser of the product.

For warranty service, contact A Designs Audio at 818-716-4153 to obtain a Return Merchandise Authorization (RMA) number. After obtaining the RMA number, ship defective product to A Designs Audio, P.O. Box 4255, West Hills, CA 91304. Write RMA number on outside of shipping box. Be sure to include your name, address, phone number, copy of original sales invoice and detailed description of the problem. A Designs Audio will not accept responsibility for loss or damage in shipping.
Warranty is void if product serial numbers have been removed or if the product has been damaged by abuse or unauthorized modification and repair. There are no user serviceable parts inside.

THIS WARRANTY IS IN LIEU OF ALL WARRANTIES WHETHER ORAL OR WRITTEN, EXPRESSED OR IMPLIED. A DESIGNS AUDIO MAKES NO OTHER WARRANTY EITHER EXPRESSED OR IMPLIED, INCLUDING WITHOUT LIMITATION, ANY IMPLIED WARRANTIES OF MERCHANTABILITY, UNLESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT. PURCHASERS SOLE AND EXCLUSIVE REMEDY UNDER THIS WARRANTY SHALL BE REPAIR OR REPLACEMENT AS SPECIFIED HEREIN. IN NO EVENT WILL A DESIGNS AUDIO BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCREMENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM ANY DEFECT IN THE PRODUCT, INCLUDING LOST PROFITS, DAMAGE TO PROPERTY AND, TO THE EXTENT PERMITTED BY LAW, DAMAGE FOR PERSONAL INJURY, EVEN IF A DESIGNS AUDIO HAS BEEN ADVISED OF THE POSSIBILITIES OF SUCH DAMAGES.

A Designs, A Designs Audio, and PACIFICA are trademarks of A Designs. All other trademarks are the property of their respective owners.


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