Doepfer A-183-9 Quad USB Supply main image

Doepfer A-183-9 Quad USB Supply

$47.00 to $47.77 Price Tier: Budget

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Page last updated Jul 04, 2026

Pricing and availability

We compare 600+ stores and found this item at 2 stores. Prices updated July 4, 2026.

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$47.77 4 available New

$41.80 1 available Used

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4.1 (23)

$48.00 $47.00 $1.00 · All time low

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Average Price: $46

Budget/Beginner

$149

$350+

Price Tier

In the Modular Synthesizers category, Doepfer A-183-9 Quad USB Supply is priced in the Budget/Beginner range. This is great gear to get started with or for creators on a budget.

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High-end

Price History

Based on price data from 1 merchant for "Doepfer A-183-9 Quad USB Supply". Prices shown reflect NEW condition. Tracking began Apr 25, 2026.

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Description

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Introducing the Doepfer A-183-9 Quad USB Supply, the silent powerhouse for your modular synthesizer setup. This compact Eurorack module is designed to effortlessly power your external USB devices, ensuring your creative flow remains uninterrupted. With four USB ports, it offers ample connectivity for a variety of peripherals, from MIDI controllers to small USB-powered lights, making it an indispensable tool for live performances and studio sessions alike.

Despite its minimal footprint of 2 HP, the A-183-9 remains a robust solution for musicians who require additional USB power without the clutter. Its sleek design integrates seamlessly into existing setups, while demanding zero power from your +12 V and -12 V rails. Note that it requires a housing with a +5 V power supply, and the Doepfer A-100PSU3 is recommended for optimal performance.

Engineered with precision, this module is perfect for modular enthusiasts looking to expand their rig's functionality without compromising on space or power efficiency. Whether you're a seasoned performer or a budding synthesist, the Doepfer A-183-9 ensures that your gear stays powered and ready to produce.

Key Features:

Quad USB Power Supply for modular synthesizer setups
4 USB ports for powering external devices
Requires a housing with a +5 V power supply (Doepfer A-100PSU3 recommended)
Power requirement: 0 mA (+12 V) / 0 mA (-12 V)
Compact width of 2 HP and depth of 30 mm

Product specs

Available since	November 2018
Switch Modul	No
CV-Editor/VC-Processor	No
Tools	Yes
Width	2 TE / HP

FAQs

What is the primary function of the Doepfer A-183-9 Quad USB Supply?: The Doepfer A-183-9 Quad USB Supply is designed to provide power to USB devices within a modular synthesizer setup, offering four USB ports for powering external gear like MIDI controllers or small USB lights.
How much space does the Doepfer A-183-9 take up in a modular synthesizer rack?: The Doepfer A-183-9 occupies 2 TE/HP in a modular synthesizer rack, making it a compact power solution for USB devices.
Can the Doepfer A-183-9 be used to power MIDI controllers?: Yes, the Doepfer A-183-9 is suitable for powering MIDI controllers and other USB-powered devices in a modular synth system.

Reviews

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PROS

Powers USB lights and external keyboards effectively
Compatible with devices like Kavis no-drain for 5V rail requirement

CONS

Feels cheap, not on par with other A100 modules
USB sockets bend the aluminium panel, indicating poor durability
USB sockets have too much movement, risking damage
Connector quality below expectations for its price
Non-standard "lite" connector feels fragile
May introduce noise (hum/buzz) with some USB keyboards

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Doepfer A-183-9 Quad USB Supply.

Features and functionality

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Owners note that the A-183-9 requires a compatible +5V rail in the PSU, as it pulls power from this rail to power USB devices.
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A multimeter in continuity test mode is recommended to confirm that plugging in the module doesn’t short any bus rails together.
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User experience

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Some users experience noise issues, such as a whining sound, when connecting the module to their PSU, especially with additional USB devices plugged in.
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Some users express dissatisfaction with Doepfer's design, which allows for multiple incorrect connection methods that could lead to damage.
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Use cases and applications

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Ideal for those with limited power outlets, the module can power multiple USB devices like MIDI controllers directly from the Eurorack case.
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Without a dedicated 5V power source, the module may not function or could damage connected devices, underscoring the importance of verifying power availability and connection accuracy.
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Setup and maintenance

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It's crucial to keep the +5V rail usage under 80% of its capacity to avoid overloading, as it is typically the least powerful rail.
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Incorrect polarity connections can cause reverse voltage issues, potentially damaging USB devices. Ensure correct orientation with white stripe and "-12" on the adapter board.
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Value and pricing

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At approximately £40, it is considered an affordable solution for adding USB power to modular setups, despite potential power limitations.
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