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Item # H72807

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A Designs JM3001 Solid State Mic Pre with EQ
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      A Designs JM3001 Solid State Mic Pre with EQ (H72807)
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A uniquely designed versatile preamplifier-equalizer-instrument DI that can be used together or independently.

The JM-3001 from A-Designs Audio is equally ideal for both studio recording and live sound use.
Hand-built in the US, the new A-Designs JM30001 features three inputs: microphone, instrument and EQ/insert, which may be used together or independently. The product is also equipped with a highly musical three-band parametric EQ, high/low filters, and two independent transformer-balanced outputs (microphone and EQ).

The heart of the JM-3001 is its C12X discrete-transistor operational amplifier designed by Carl Johnson. Operating on ±30VDC rails, the C12X is a high-gain, fast-slew, stable audio block with virtually no DC offset over the audio spectrum, and is capable of driving a 50 ohm load at 50Hz with very little current draw. It is used in the microphone preamp, instrument input amp, and main output/EQ output stages of the product.

According to A Designs' Peter Montessi, “The JM-3001’s preamp is an original design with depth and detail for miles, while the EQ is a full parametric with its own transformer, so you can use it with or without the pre. The freq settings are highly reminiscent of classic console filters and musically complement any source you run through them. The instrument input is totally separate from the pre and EQ and sounds amazing on its own as well."

The JM-3001’s microphone preamplifier is a single-stage, transformer-coupled and balanced I/O design benefitting from the C12X for ultra-transparent audio. This section feeds the EQ and preamp output mult simultaneously and includes phase reverse, a -20dB pad, +48V phantom power with LED indicator and a plastic conductive gain control pot.

The instrument input preamplifier is a single-stage, single-ended, high impedance input designed primarily with guitar and bass pickups in mind. Similarly utilizing a C12X discrete op amp, this section is separate from the mic pre and includes a 1/4-inch phone jack and gain pot on the front panel. Like the mic preamp, this section also feeds the EQ and preamp output mult simultaneously.

The equalizer input/insert return is a direct-coupled, balanced input that is post the mic pre and the instrument input. Inserting a TRS 1/4" phone jack into this connection allows for direct input to the equalizer, bypassing both the mic pre and instrument input.

The JM-3001’s three-band parametric equalizer is a unique design featuring 33 frequencies with three bands of overlapping ranges covering from 50Hz to 15KHz. Both the frequency selection and the ±12 dB equalization controls are step-type switches for precise and repeatable settings. Each band has a Q switch with three fixed positions: sharp (S), wide (W) and narrow (N). The low and high bands are normally of a peak/dip type, but flipping the shelf switch to the up position on those bands changes the characteristic to shelf type. The shelving switch disables the Q feature on high and low bands only.

When in the up position, the high/low filters insert the fixed 12dB/octave high- and low-cut filters. These filters work whether the EQ is in or out.

As with all A-Designs Audio products, only the best possible components are used. Resistors are 1% metal film except the EQ, which is 0.1%. Capacitors are all quality polystyrene, polypropylene, COG and bi-polar. Furthermore, input/output XLR connectors and switches are gold/silver contact with no relays.

A Designs JM3001 Solid State Mic Pre with EQ Features:

  • Versatile preamplifier, equalizer, and instrument input, which can be used together or independently
    High-gain, fast-slew preamp with virtually no DC offset over the audio spectrum – an original design with "depth and detail for miles"
    Full 3-band parametric EQ with filters reminiscent of classic consoles and stepped controls for precise repeatability
    Phase reverse
    -20dB pad
    +48V phantom power with LED indicator
    Plastic conductive gain control pot
    Input/output XLR connectors and switches are gold/silver contact with no relays




A Designs JM3001 Solid State Mic Pre with EQ

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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Pro Coverage includes:

  • Accidental damage protection (new gear only)
  • Expedited Repair
  • Free Shipping (for returns or repairs)
  • 100% Coverage for Commercial Use
  • Extended Return Period
  • Extended Price Protection
  • No Lemon Guarantee
  • Free Transfer of Coverage to a new owner
  • Repair Costs Covered for up to 3 years from date of purchase
  • Repairs Can Be Authorized Toll-Free by Phone or the via the web
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