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Midibox MB6582 SID Synthesizer

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6 community setups

1 wishlisted

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Page last updated Aug 10, 2025

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Description

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8 x SID Chip Synth - runs as 8 mono or 4 stereo Each pair of SIDs can be either 6581 SIDs or 8580/6582 SIDs.

DIY synth based on the Midibox platform

Videos

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AnalogFighter

MIDIBox MB6582 DIY SID-Synth

AnalogFighter

MB-6582 build - midibox SID based synth with 8x SID c64 chip synth

Rob Lo

Midibox MB 6582 demo

Enzo Scifo

Reviews

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Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Midibox MB6582 SID Synthesizer.

Features and functionality

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The MB6582 allows for polyphonic mode with 4 voices, enhancing its ability to create stereo patches or mix SIDs for complex mono sounds.
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The MB6582 can be built in various sizes or form factors using basic MIDIbox PCBs, allowing for customization from minimal to complex setups.
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User experience

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Owners describe the MB6582 as producing lush sounds with impressive modulation capabilities, likening it to stacking patches on a Jupiter8 for depth.
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Owners highlight the scarcity of PCBs, noting they can sell out quickly and typically have long restock periods, emphasizing prompt purchases during availability.
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Setup and maintenance

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It is recommended to use IC sockets when working with SID chips to avoid damage during installation or future maintenance.
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A 12V DC wall wart can replace traditional C64 power supplies; use switching regulators for voltage drops over 3V, adding two jumper wires for conversion.
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Mods and upgrades

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The Therapsid MKIII version features full-sized 1/4-inch outputs and MIDI jacks, which are appreciated for their build quality despite the higher price.
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It's noted that the MB6582 offers a knobby control surface, enhancing hands-on interaction compared to other SID synths.
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The Recom R-78C50-10 DC-DC converter is recommended as a cost-effective, compact replacement for the PT78ST105, with versions supporting both 9V and 12V SIDs.
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Build quality

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One owner emphasizes the importance of handling SID chips with care due to their delicate nature and valuable performance.
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Value and pricing

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SID chip prices have decreased from over $100 to around $30, making projects like the MB6582 more accessible.
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The MB6582 can be assembled from parts, with cost varying based on setup complexity, suggesting flexibility in budget and features.
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Interest in the MB6582 has surged, resulting in quicker PCB restocks, but shipping costs and PCB pricing can be prohibitive for some builders.
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Comparisons

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The MB6582 is described as a "SID monster" compared to sammichSID, which has a Shruthi-like form factor with two SIDs in stereo.
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Use cases and applications

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A simple alternative to the MB6582 is using a Commodore64 with an MSSIAH cart, which includes a MIDI port plug for synth capabilities.
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An owner used the MB6582 for a live game-music medley performance, showcasing its application for gaming-style music production.
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Artist usage

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Mentat

Verified via Photo

In a studio photo shared on Instagram, Mentat showcases the Midibox MB6582 SID Synthesizer on their desk, highlighting its presence in their current setup.