WALDORF HS9004A Holzworth Phase Coherent Synthesizer Comm 4CH Opt. A4 Module

( Brand: Waldorf ), ( Type: Synthesizer ), ( Input/output Ports: Midi ), ( Midi: Din In ), ( Manufacturer Part Number: HS9004A )

Review WALDORF Holzworth 4ch Phase Coherent Synthesizer Opt. A4 Comm Module Used

The Waldorf HS-9004A Holzworth 4-channel phase coherent synthesizer with Opt-A4 COMM module is an impressive piece of electronic music equipment that offers a unique combination of versatility, power, and intuitive control. This synthesizer is not just a simple electronic instrument, but a creative tool that enables musicians and sound designers to explore the vast sonic landscape with ease.

At its core, the Waldorf HS-9004A is a 4-voice polyphonic synthesizer equipped with four independent voices, each capable of generating rich and complex sounds using a variety of waveforms, oscillator shapes, and modulation sources. The phase coherent design ensures that all voices remain in sync, resulting in tight and seamless layering of sounds.

The Opt-A4 COMM module expands the functionality of the HS-9004A by adding MIDI and CV/Gate I/O, making it easier to integrate into various studio and live performance setups. The MIDI implementation includes both IN and OUT ports, allowing for bi-directional communication with other MIDI devices, while the CV/Gate I/O enables the use of external controllers and modulation sources.

Each voice on the Waldorf HS-9004A is equipped with two multimode filters, providing a wide range of filter shapes and frequencies to shape and manipulate the sound. The filters can be used in series or parallel configurations, adding another layer of versatility to the instrument. The synthesizer also offers a comprehensive modulation matrix, enabling users to create complex and intricate relationships between various sound shaping parameters.

Additionally, the Waldorf HS-9004A offers a range of effects processors, including distortion, chorus, phaser, flanger, and reverb, providing further opportunities to sculpt and enhance the sound. The user interface is designed to be intuitive and easy to use, with a large, backlit LCD display and tactile, responsive knobs and switches.

The Waldorf HS-9004A Holzworth 4-channel phase coherent synthesizer with Opt-A4 COMM module is a powerful and versatile instrument that offers a wealth of creative possibilities for musicians and sound designers. Its ability to generate complex, rich sounds, its extensive modulation capabilities, and its ease of integration into various studio and live performance setups make it an invaluable addition to any electronic music production setup.

The Waldorf HS-9004A Holzworth 4-channel phase coherent synthesizer with an OPT A4 COMM module is a professional-grade synthesizer known for its rich sound and versatility. Here are some pros and cons that might help you make an informed decision about purchasing this synthesizer.

1. Phase Coherent Synthesis: This synthesizer offers phase coherent synthesis, which means that all four channels generate sound at exactly the same phase. This results in more consistent and stable sound when using multiple voices or layers.

2. Rich and Diverse Sounds: The Waldorf HS-9004A is capable of generating a wide range of sounds, from classic analog synth sounds to more modern digital and FM synthesis.

3. Modular Design: The modular design of the synthesizer allows for a great deal of customization and flexibility. Users can easily create their own patches and connect various modules to expand the capabilities of the synthesizer.

4. High-Quality Build: The Waldorf HS-9004A is built with high-quality components and has a robust, durable design. It is also easy to use, with intuitive controls and a clear display.

5. MIDI and CV/Gate Compatibility: The OPT A4 COMM module offers both MIDI and CV/Gate compatibility, allowing users to connect the synthesizer to other equipment and control it using various methods.

1. Expensive: The Waldorf HS-9004A is a professional-grade synthesizer, and its price reflects its high-end features and capabilities.

2. Complexity: The modular design and extensive features of the synthesizer can be overwhelming for beginners or those who are not familiar with synthesis.

3. Limited Connectivity: While the OPT A4 COMM module offers MIDI and CV/Gate compatibility, some users may find that it does not offer enough connectivity options for their specific setup.

4. Heavy and Bulky: The Waldorf HS-9004A is a large and heavy synthesizer, which can make it difficult to transport or move around.

The Waldorf HS-9004A Holzworth 4-channel phase coherent synthesizer with an OPT A4 COMM module is a powerful and versatile synthesizer that offers a rich and diverse range of sounds and features. While it is expensive and may be complex for some users, its high-quality build, intuitive controls, and modular design make it a worthwhile investment for professional musicians and sound designers.

If you are a professional musician or sound designer looking for a high-end synthesizer with a wide range of features and sounds, the Waldorf HS-9004A Holzworth 4-channel phase coherent synthesizer with an OPT A4 COMM module is an excellent choice. However, if you are a beginner or have a smaller budget, you may want to consider a more affordable and user-friendly synthesizer.

part # hs9004a prices

• $499.00-$1004.40

specifications synthesasha:

• brand: Waldorf
• type: Synthesizer
• input/output ports: Midi
• midi: Din In
• manufacturer part number: HS9004A

returns synthesasha:

• time: 30 Days
• policy: Returns Accepted
• paid by: Seller
• method: Money back

general synthesasha:

• condition: Used
• Musical Instruments Gear > Pro Audio Equipment > Synthesizers

offer synthesasha:

• best offers: True
• quantity: 1
• sold: 0
• availability: In Stock
• started: February 24, 2026
• options: Ship-to-home

seller synthesasha:

• rating: 99.9%
• # reviews: 12621

shipping synthesasha:

• type: Fixed
• cost: $0.00
• transit: 4-8 Days
• service: Economy
• class: Economy

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