Great River Electronics MP-500NV 500 Series Mic Preamp Module

The MP-500NV is a high-quality mic preamp that captures the classic tone of early 1970s British consoles. It uses modern components for better clarity, punch, and reliability, while still delivering rich vintage character. Dual metering before and after the gain stages allows creative gain shaping for a wide range of tones.

Key Features:
• XLR mic input and high-Z instrument input (front panel)
• Input gain: 5 dB steps up to 60 dB
• Output gain: –25 to +10 dB, with max gain of 70 dB
• Class A output stage with 70 mA current
• Dual meters show levels before and after main gain stages (exclusive to Great River)
• Switches for polarity, phantom power, input impedance (1200/300 ohm), and output loading (600 ohm)
• Custom Sowter transformers
• Gold-plated switches
• 3-year warranty (with registration)
• Fits any standard 500-series rack (2-slot)

Why It Stands Out:
• Delivers a bold, vintage analog tone thanks to custom transformers
• Great for bass, guitar, and synths via the FET-buffered high-Z input
• Unique dual metering for creative gain control
• Very low noise, even at high gain levels
• Easy to integrate—powered by standard 500-series rack supply

US and EU parcels ship via UPS, ETA 1-7 working days from pickup day zero. That also applies to most locations worldwide.

All shipments are fully insured.

Bigger shipments requiring pallets or custom made crates ship to US, CA, JP, CN, AU and other outside of EU locations via DHL Air Freight, ETA is normally approx. 7-14 working days from pickup day zero.

Big shipments inside EU ship via different freight companies, recently mostly via ACE Logistics. Freight forwarders can use different courier companies for deliveries to final destinations.

Palletising and crating time can vary depending on the size of the shipment and packaging queue. We pack all our shipments with great care.

You are most welcome to pick your order up yourself from our Retrosonic Pro Audio showroom, studio and warehouse in Tallinn, Estonia.

We ship worldwide – contact us for a personal shipping quote or any other questions.

VAT (Value Added Tax) can be deducted if you have a company with a valid EU VAT number or if you're based outside of the EU. Non-EU buyers pay all and any import tax and duty as regulated by their local customs.