What is the primary function of the Palmer PMT-09?

The primary function is to duplicate a mic-level audio signal at a 1:1 ratio. This allows for the creation of an identical output from a single input without degrading the sound quality.

What is the transformation ratio of this unit?

The PMT-09 features a 1:1 ratio. This means the output volume levels remain identical to the input levels, provided there is a proper impedance match.

How is the PMT-09 mounted?

It is designed for through-hole soldering onto a Printed Circuit Board (PCB). The pins are located on the bottom of the transformer to provide a secure and stable mechanical connection.

What type of shielding does the PMT-09 use?

It utilizes both electrostatic and mu-metal shielding. Mu-metal is specifically used to protect the audio signal from external magnetic fields and interference.

Can this be used with a Shure SM58?

Yes, it is highly compatible with the Shure SM58. It is designed to handle mic-level signals from dynamic microphones efficiently.

Does the PMT-09 include external connectors?

No, it does not. It is a raw component intended for professional installation and must be soldered into a circuit or PCB.

Is this transformer suitable for the Sennheiser MD 441-U?

Yes, its high-quality construction makes it suitable for high-end dynamic microphones like the MD 441-U. It maintains the signal integrity required for such sensitive equipment.

Can I use the PMT-09 to split a signal for an Electro-Voice RE20?

Absolutely. The PMT-09 provides the isolation and transparency needed when splitting signals from broadcast-standard microphones like the RE20.

What is the typical price for a single PMT-09 unit?

The typical price for this component is approximately GBP 58. This price point reflects its professional-grade shielding and construction.

Does the package include multiple transformers?

No, despite some display images showing multiple units for comparison, the PMT-09 is sold as a single transformer. Other transformers shown in marketing materials are for display purposes only.

Is the PMT-09 compatible with the Shure 520DX Green Bullet?

Yes, it can be used with the Shure 520DX. However, users should ensure the impedance and signal levels are appropriate for their specific custom application.

Who should perform the installation of the PMT-09?

Installation should be carried out by professionals or individuals experienced in electronics. It requires soldering and adherence to safety precautions for component-level work.

Gear article

Palmer PMT-09 Mic Level Split Transformer

The Palmer PMT-09 is a high-quality, professional-grade mic level split transformer designed for audio signal duplication without quality loss. It features a 1:1 ratio and is housed in a mu-metal shield to ensure maximum isolation from electromagnetic interference and magnetic fields.

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Technical Description

The Palmer PMT-09 is an internal component designed for professional audio engineering applications. It functions by taking a single mic-level input and providing a duplicated output signal with no degradation in sound quality. Because it maintains a strict 1:1 volume ratio, it is ideal for splitting signals where gain parity between the input and output is essential.

Physically, the unit is designed for permanent installation. It features pins on the bottom of the casing, specifically intended for through-hole soldering onto a Printed Circuit Board (PCB). This design ensures a sturdy and reliable connection suitable for both rack-mounted studio gear and portable live sound equipment.

Shielding and Isolation

One of the most critical aspects of the PMT-09 is its protective housing. It utilizes both electrostatic and mu-metal shielding. Mu-metal is a specialized nickel-iron alloy with very high magnetic permeability, which is particularly effective at attenuating low-frequency magnetic fields that typically cause hum in audio circuits.

This level of isolation allows the transformer to operate cleanly even in environments with high levels of electromagnetic interference (EMI), such as near power transformers or high-voltage stage lighting systems.

Installation and Compatibility

As a component-level part, the PMT-09 is intended for use by professional technicians and manufacturers. It is compatible with a wide range of industry-standard dynamic microphones, such as the Shure SM58, SM57, and Beta 58A. It is also suitable for high-fidelity dynamic models like the Sennheiser MD 441-U and Electro-Voice RE20.

When installing the unit, it is necessary to follow standard safety precautions and best practices for soldering. The transformer does not include external housing or connectors, as it is designed to be integrated into larger circuits or custom-built splitter boxes.

Comparison to Alternatives

Compared to standard active splitters, the PMT-09 offers a passive solution that does not require an external power source. While active splitters can offer gain, the PMT-09 focuses on transparency and noise rejection through its 1:1 ratio and mu-metal shielding. Unlike lower-cost generic transformers, the PMT-09 is specifically engineered to prevent signal degradation, ensuring that the character of vocal microphones like the Sennheiser e945 or e935 remains intact.

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Frequently asked questions

What is the primary function of the Palmer PMT-09?: The primary function is to duplicate a mic-level audio signal at a 1:1 ratio. This allows for the creation of an identical output from a single input without degrading the sound quality.
What is the transformation ratio of this unit?: The PMT-09 features a 1:1 ratio. This means the output volume levels remain identical to the input levels, provided there is a proper impedance match.
How is the PMT-09 mounted?: It is designed for through-hole soldering onto a Printed Circuit Board (PCB). The pins are located on the bottom of the transformer to provide a secure and stable mechanical connection.
What type of shielding does the PMT-09 use?: It utilizes both electrostatic and mu-metal shielding. Mu-metal is specifically used to protect the audio signal from external magnetic fields and interference.
Can this be used with a Shure SM58?: Yes, it is highly compatible with the Shure SM58. It is designed to handle mic-level signals from dynamic microphones efficiently.
Does the PMT-09 include external connectors?: No, it does not. It is a raw component intended for professional installation and must be soldered into a circuit or PCB.
Is this transformer suitable for the Sennheiser MD 441-U?: Yes, its high-quality construction makes it suitable for high-end dynamic microphones like the MD 441-U. It maintains the signal integrity required for such sensitive equipment.
Can I use the PMT-09 to split a signal for an Electro-Voice RE20?: Absolutely. The PMT-09 provides the isolation and transparency needed when splitting signals from broadcast-standard microphones like the RE20.
What is the typical price for a single PMT-09 unit?: The typical price for this component is approximately GBP 58. This price point reflects its professional-grade shielding and construction.
Does the package include multiple transformers?: No, despite some display images showing multiple units for comparison, the PMT-09 is sold as a single transformer. Other transformers shown in marketing materials are for display purposes only.
Is the PMT-09 compatible with the Shure 520DX Green Bullet?: Yes, it can be used with the Shure 520DX. However, users should ensure the impedance and signal levels are appropriate for their specific custom application.
Who should perform the installation of the PMT-09?: Installation should be carried out by professionals or individuals experienced in electronics. It requires soldering and adherence to safety precautions for component-level work.