ADDAC System ADDAC810 Phono Pre-Amp (????)

That warm, crackling vinyl sound, now in Eurorack.

Overview

The ADDAC System ADDAC810 Phono Pre-Amp doesn't generate sound. It lets vinyl in. As a Eurorack module, it connects turntables directly to a synth system with proper RIAA equalization and level matching. ADDAC System makes it, and it belongs to the ADDAC800 series, which the company groups under "Analog Sound Utilities" - tools that don't make sound themselves. It takes phono-level RCA signals, applies the standard RIAA curve to correct the record's frequency balance, and outputs at Eurorack-compatible levels through 3.5mm jacks. It's small and focused, and modular users who want physical media in their patches will need something like it.

It doesn't generate tones, but it has a musical use. Owners can play back field recordings, found sounds, or full tracks into a modular setup for sampling, looping, or mangling with filters and effects. It's described as a way to "add soul to your modular system," meaning the pops, the subtle warble and the imperfections of vinyl. You can trigger envelopes from drum breaks or feed ambient textures into a granular processor.

Specifications

Manufacturer	ADDAC System
Product type	Eurorack module, phono preamplifier module
Format	Eurorack
Width	4 hp
Depth	4.5 cm
Current Draw	40 mA +12V
Features	RIAA equalization

Key Features

Phono to Eurorack Signal Conversion

The ADDAC810 accepts unbalanced phono-level signals via RCA inputs, the standard output from most turntables. These signals are far weaker than what Eurorack systems expect, so the module amplifies and equalizes them to match modular levels. It converts both the voltage and the connector standard, outputting through 3.5mm jacks that plug directly into mixers, recorders, or processors in a rack. No external preamp is needed, which simplifies setups for live or studio use.

RIAA Equalization

All vinyl records are cut with the RIAA equalization curve, which reduces bass and boosts treble during mastering to fit more music on a disc and prevent groove distortion. The ADDAC810 applies the inverse curve to restore flat frequency response. Without it, records would sound thin and boomy. The module includes the expected RIAA correction, so playback is accurate and full-bodied.

Volume Control and Gain Staging

A dedicated volume control lets users adjust output level before it hits the rest of the system. This helps prevent overloads downstream, especially with variable source material - a heavily compressed rock record versus a dynamic jazz cut, for example. It gives hands-on control over gain staging, so the user can set how loud or present the vinyl sits in the mix.

Earth Grounding for Hum Reduction

Turntables are notorious for introducing ground loops, those low, persistent hums that creep into audio chains. The ADDAC810 includes an earth grounding feature designed to cancel out excessive hum by providing a clean path to ground. It's often the difference between a usable signal and one swamped in 60-cycle noise. For modular users running multiple powered devices, it helps keep the signal path clean.

LED Level Monitoring

Meters are rare in modular, so visual feedback helps. The ADDAC810 includes LED monitoring that shows signal presence and clipping. A healthy signal lights one LED. If levels approach or hit the red zone, another LED warns of potential distortion. Users can then adjust the volume control to avoid clipping, which matters with unpredictable source material or sudden loud passages.

Collectibility & Value

The ADDAC810 is not a vintage relic. It's a modern module, and pricing reflects current retail and second-hand markets. A used unit was listed on Reverb for $157.64, according to a ModularGrid listing. New units are priced at $158.00 AUD (including GST) through at least one retailer, while another vendor, Perfect Circuit, lists a pre-order price of $179.00. These figures suggest a stable, modestly priced niche module, not one subject to collector inflation. Given its utility rather than rarity, it's unlikely to appreciate significantly. No data exists on common failures, repair frequency, or long-term reliability.