Vintage Pro Audio Equipment | AudioScape Engineering Co.

The MAP 1731® op amp utilizes all thru-hole old-school components; this is like a vintage op amp coming off the production line in 2024. It is based on the 1731 op amp that originated with Melcor® in the late 1960’s, though MAP utilized this op amp design (and others) in its projects after Melcor’s® demise. We are including some photos of MAP’s 1731® above for historical reference. Having dissected many of these over the years, we found that the earliest versions of the 1731® were constructed with carbon composition resistors and film caps, later versions moved to carbon film resistors. We have opted to use carbon composition resistors in this run (yum!) and styroflex caps across the input. The same, original, 2n3707 transistors are utilized throughout. One modern deviation, for reliability and tone, is the integration of silver-can output transistors. These vintage style transistors can handle the heat dissipation better and, quite frankly, we found them sonically superior in our listening tests. With this minor but necessary change, these op amps are now made to last a lifetime.

Why Modular Audio Products?

The idea of bringing this back is to pay homage in the most respectful way possible to Modular Audio Products, while tapping into the spirit of what they set out to achieve. The original MAP products, while rare, were highly ambitious designs for their time and would still be on the must-have list for many studios. Chris has been personally collecting and admiring these original pieces for many years. This is just the beginning, stay tuned!

Why You Should Buy a D.AM-27?

- Proudly built in small-batches, end to end, on-site, in the USA by a small team of skilled assemblers. Each assembler is assigned 2 products, making them masters of their craft.

- Know where your hard-earned money is going and feel good about any purchase made from us! Every dollar spent helps feed a family, fund college tuition and supports NEW product development / R & D. - Our margins are very tight. BUT, this sacrifice allows us full control over every aspect of the manufacturing and assembly process. - We are able to capitalize on the USA surplus market and use NOS parts where it matters and most importantly, we are able to offer a product that is (in our biased opinions), simply a step above the competition.

AUDIOSCAPE offers a HASSLE-FREE, 2-YEAR WARRANTY included with EVERY unit we sell!**FREE PATCHRAT PRO SUBSCRIPTION INCLUDED WITH EVERY PURCHASE!**

FEATURES & SPECS:

• Handcrafted End to End in the USA

• In-house MAP 1731® class A discrete op amp with original parts

• Original spec carbon composition resistors and precision Dale resistors throughout

• Original spec Melcor®-Era USA made Transformers

• 10 Led Bar graph for precision Gain metering

• MAP’s new Triangular knob design (a knob that means business)

• Output Attenuator to drive gain and get as much coloration as desired

• Switchable High (120 Hz) and Low (15 kHz) pass filters

• -20 dB Pad

• +48V Phantom Power

• Input Phase reverse

• +4 dBm Line input

• Separate DI inputs for each channel

• +69dB of Max Gain per Channel (+/- 1db), Fully Variable

• Alpha potentiometers

• Neutrik XLR Input and Output connectors

• External Intl Wall Voltage Friendly External PSU

• **specifications, parts & pricing subject to change

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