Grado Timbre Opus4 Cartridge (1.0mV, Low Output)

In Stock	An In Stock item is available to ship normally within 24 business hours.
Preorder	A Preorder is an item that has not yet been released. Typically the label will set a projected release date (that is subject to change). If a projected release date is known, we will include this in the description in red. Other Preorders are set to release 'TBA.' This means that release date is yet 'To Be Announced'. The Preorder can be released anywhere between weeks, months or years from its initial announcement.
Backordered	An Out Of Stock item is an item that we normally have available to ship but we are temporarily out of. We do not have a specific date when it will be coming.
Awaiting Repress	Awaiting repress titles are in the process of being repressed by the label. No ETA is available at this time.
Expected On	When an item is Out Of Stock and we have an estimated date when our stock should arrive, we list that date on our website in the part's description. It is not guaranteed.
Special Order	A Special Order item is an item that we do not stock but can order from the manufacturer. Typical order times are located within the product description.

In Stock

An In Stock item is available to ship normally within 24 business hours.

Preorder

A Preorder is an item that has not yet been released. Typically the label will set a projected release date (that is subject to change). If a projected release date is known, we will include this in the description in red. Other Preorders are set to release 'TBA.' This means that release date is yet 'To Be Announced'. The Preorder can be released anywhere between weeks, months or years from its initial announcement.

Backordered

An Out Of Stock item is an item that we normally have available to ship but we are temporarily out of. We do not have a specific date when it will be coming.

Awaiting Repress

Awaiting repress titles are in the process of being repressed by the label. No ETA is available at this time.

Expected On

When an item is Out Of Stock and we have an estimated date when our stock should arrive, we list that date on our website in the part's description. It is not guaranteed.

Special Order

A Special Order item is an item that we do not stock but can order from the manufacturer. Typical order times are located within the product description.

Description

This product can only be shipped to U.S. addresses.

Opus4 is the entry point into the Grado Timbre Series, introducing the tonal character and construction of Grado's wood body cartridges. Built on decades of cartridge design experience, it delivers a balanced and musical presentation while maintaining the core performance principles that define Grado cartridges.

Utilizing Grado's moving iron design, Opus4 provides a stable and consistent signal with low moving mass and long-term reliability.

Offered in both stereo and mono configurations, Opus4 represents the foundation of the Grado wood cartridge line.

Performance

Opus4 is available in both high and low output configurations, allowing for compatibility across a wide range of phono stages.

Its presentation is balanced and controlled, with clear detail and a smooth, natural top end. The midrange carries presence and warmth, while low frequencies remain defined and composed.

Recordings are presented with stability and coherence, maintaining separation and musical flow while allowing the character of the recording to come through naturally.

Moving Iron Design

All Grado cartridges utilize a moving iron design built on Joseph Grado's patented flux-bridger principle.

This approach allows the cartridge to generate a precise signal with extremely low moving mass, while keeping the coil structure fixed. The result is a presentation that combines speed, control, and harmonic integrity without the fragility often associated with traditional moving coil systems.

Diamond, Cantilever & Stylus

Opus4 features a bonded elliptical diamond mounted to an aluminum cantilever.

The elliptical profile provides effective groove contact and reliable tracking, while the aluminum cantilever contributes to a stable and balanced presentation. This combination delivers consistent performance across a wide range of recordings.

Coil & Internal Structure

The internal signal path is built using ultra-high purity 5N OCC copper, selected for its conductivity and consistency.

Each cartridge undergoes cryogenic treatment and internal damping to reduce unwanted resonance and preserve signal integrity.

Technical Specifications

Non-Sensitive to Capacitive Load
Body	American Maple Wood
Cantilever	Aluminum/Elliptical Diamond
Output	High 4.0mV @5 CMV (45) Low 1.0mV @5 CMV (45)
Inductance	High Output 55mH Low Output 6mH
Resistance	High Output 660 ohms Low Output 70 ohms
Input Load	10k–47k ohms
Cartridge Weight	8.3 grams
Tracking Force	1.6–1.9 grams
Compliance	20µm/mN
Channel Separation	Average 30dB – 10–30kHz
Controlled Frequency Response	10–60kHz
Builds	High Output, Low Output, Mono