Canary Audio M330 Monoblock Amplifiers

Canary Audio M330 Monoblock Amplifiers

26 Watts of Class A 300B Triode Power. Custom-Wound Transformers. Handcrafted in California, USA.

The Canary Audio M330 Monoblock Amplifiers bring the celebrated 300B directly heated triode to a carefully engineered Class A push-pull design. Delivering a manufacturer-rated 26 watts RMS per monoblock, the M330 combines traditional vacuum tube technology with dedicated power supplies, custom-built transformers and handcrafted American construction.

Each M330 uses two matched 300B output tubes and two 6SN7 signal and driver tubes. A complete stereo pair therefore employs four 300B triodes, with a separate amplifier dedicated to each loudspeaker channel.

Designed for enthusiasts who value specialist analogue engineering, the M330 offers an alternative to conventional low-powered single-ended 300B amplifiers while retaining a relatively straightforward four-tube architecture per channel.

Class A Push-Pull 300B Amplification

The defining feature of the Canary Audio M330 is its Class A push-pull triode output stage.

Many traditional 300B single-ended amplifiers operate with relatively modest power output. The M330 uses a matched pair of 300B tubes in a push-pull circuit to provide a higher rated output of 26 watts per channel.

In push-pull operation, the two sides of the output stage work together through a carefully designed output transformer. This allows the manufacturer to pursue greater output power while taking advantage of the electrical characteristics of the directly heated 300B triode.

The M330 is a genuine monoblock amplifier, meaning each chassis serves one audio channel. Two units are required for conventional stereo reproduction.

Two Matched 300B Output Triodes per Channel

Each M330 monoblock incorporates two matched 300B output tubes.

The 300B is one of the most recognised valves in high-end audio. Its directly heated triode construction has been widely adopted by specialist amplifier manufacturers for transformer-coupled power amplification.

Canary Audio employs a pair of 300B tubes in a Class A push-pull configuration rather than the single-ended topology commonly associated with this valve.

For a stereo pair, four matched 300B output tubes are required in total. The exact supplied tube brand and available upgrades depend on the selected product variation.

6SN7 Vacuum Tube Driver Stage

Each M330 also uses two 6SN7 vacuum tubes in its signal amplification and driver circuitry.

The 6SN7 is a dual-triode valve with a long history in audio electronics. In an amplifier such as the M330, the driver circuitry must deliver the appropriate signal conditions to the 300B output stage.

According to the manufacturer’s published specifications, the complete tube complement per monoblock is:

• 2 × 300B directly heated output triodes
• 2 × 6SN7 signal and driver tubes

A complete stereo pair uses eight vacuum tubes across both amplifier chassis.

26 Watts RMS per Monoblock

Canary Audio rates the M330 at 26 watts RMS per channel.

This offers substantially more nominal power than many conventional single-ended 300B designs while remaining a comparatively moderate-output amplifier by high-power solid-state standards.

The M330 should therefore be matched with suitable loudspeakers rather than selected on power figures alone.

Loudspeaker sensitivity, nominal and minimum impedance, listening distance, room dimensions and desired playback levels are all important factors.

For an appropriately matched system, the M330 offers a technically interesting balance of traditional triode architecture and increased output capability.

Custom-Built Power Transformers

Power transformer engineering is fundamental to the operation of a vacuum tube amplifier.

The Canary Audio M330 uses a substantial custom-built power transformer developed for its particular circuit requirements.

The power transformer supplies the electrical conditions required by the amplifier’s output and driver stages. In a Class A design, this must be achieved while accommodating significant continuous power consumption and heat generation.

Canary Audio identifies its custom transformer design as an important contributor to the M330’s engineering.

Massive Custom-Wound Output Transformers

The M330 also incorporates a custom-wound output transformer.

Unlike most modern direct-coupled transistor power amplifiers, a transformer-coupled tube amplifier uses an output transformer to interface the vacuum tube output stage with the connected loudspeaker.

Its construction influences the amplifier’s frequency bandwidth, load matching and distortion characteristics.

Canary Audio developed the M330 transformer arrangement with the objective of achieving extended low-frequency performance and a wide electrical bandwidth.

The manufacturer publishes a frequency response of 10Hz to 70kHz, ±1dB.

Inside the Canary Audio M330 – Genuine Circuit Photograph

This photograph comes from the M330’s original product gallery at Chameleon Audio and shows the actual internal circuitry of the model.

The internal construction illustrates the layout of the amplifier’s electronic components within its dedicated monoblock chassis.

Dedicated Monoblock Architecture

Using separate power amplifier chassis for the left and right channels is a traditional approach in high-end audio.

With the Canary Audio M330, each amplifier has its own tubes, power transformer, output transformer and supporting circuitry.

This configuration provides a physically separate power amplifier for each loudspeaker, rather than placing both channels in a shared stereo enclosure.

It also allows the two amplifiers to be positioned according to the practical requirements of the listening room and audio installation.

150kΩ Input Impedance

The manufacturer specifies an input impedance of 150,000 ohms.

Input impedance is an important characteristic when matching a power amplifier with a line preamplifier.

The M330’s published value is relatively high and can provide a suitable electrical interface for many compatible line-level components.

Complete matching should nevertheless account for the preamplifier’s output impedance, gain, signal output level and interconnect arrangement.

0.72V Input Sensitivity

The M330 requires a manufacturer-specified 0.72V input signal for full rated output.

This means that many modern line-level sources can supply sufficient voltage to drive the amplifier to its rated output.

As a dedicated monoblock power amplifier, however, the M330 should be partnered with equipment providing appropriate volume control and source selection.

Correct gain matching helps maintain comfortable volume adjustment and avoid unexpectedly high playback levels.

Wide Frequency Response

Canary Audio specifies a frequency response extending from 10Hz to 70,000Hz within ±1dB.

This represents the published electrical bandwidth of the amplifier and its transformer-coupled output stage.

Actual acoustic performance in a listening room also depends on the connected loudspeakers and room acoustics.

Distortion, Noise and Damping Factor

The M330’s published technical specifications include:

• Total harmonic distortion: less than 0.4%
• Signal-to-noise specification: -83dB below 1 watt
• Damping factor: 12

These are manufacturer-published electrical specifications and should not be interpreted as independent laboratory measurements.

The damping factor provides one indication of the amplifier’s electrical relationship with a connected loudspeaker load, but it does not independently determine the final sound of a complete stereo system.

4Ω and 8Ω Loudspeaker Outputs

The Canary Audio M330 provides output connections for nominal 4-ohm and 8-ohm loudspeaker loads.

Correct transformer output matching is important in vacuum tube amplification.

Because loudspeaker impedance normally changes with frequency, the ideal amplifier pairing should consider the complete impedance curve rather than relying exclusively on a nominal 4Ω or 8Ω rating.

For demanding speaker systems, the M330’s 26-watt output rating should also be considered when evaluating listening levels and available headroom.

A Closer Look at the M330 Circuit Board

This second authentic photograph from the existing Chameleon Audio gallery offers a closer view of the M330’s component layout and internal wiring.

The photographs belong to the M330 product gallery and do not depict the differently configured M280 or M350 amplifiers.

Handcrafted in California, USA

Canary Audio states that the M330 is 100% handcrafted in California, USA.

The amplifier reflects the manufacturer’s commitment to dedicated tube circuitry, custom-made transformers and specialist audio construction.

Rather than emphasising unnecessary complexity, the M330 centres its design around a matched pair of 300B triodes, a dedicated driver stage and substantial transformer assemblies.

Independent Listening Impressions – Stereo Times

In his Stereo Times review of the Canary Audio M350 monoblocks, Senior Editor Key Kim discusses his earlier experience listening to the M330.

He describes the smaller amplifier as having a transparent, delicate presentation with convincing power and musical authority.

He subsequently moved to the higher-powered M350 for the full published review.

This is a useful independent listening reference for the M330, but the article is an M350 review rather than a dedicated M330 product review.

Read the Stereo Times M350 review featuring M330 listening impressions.

Canary Audio M330 vs M350

Both the M330 and the Canary Audio M350 Monoblock Amplifiers use 300B triodes in Class A push-pull circuits, but they have different output capabilities.

The M330 uses two 300B output tubes per monoblock and delivers 26W RMS.

The M350 uses four 300B output tubes per monoblock and is rated at 50W RMS.

The higher-powered M350 may provide additional flexibility with certain loudspeakers, but correct system matching remains more important than choosing on wattage alone.

Choosing a Suitable Canary Audio Preamplifier

The M330 is designed to receive a controlled line-level audio signal from an appropriate preamplifier.

The Canary Audio C1300 Tube Preamplifier is one option for listeners who want a complementary valve-based system.

For a more elaborate two-chassis preamplifier platform, explore the Canary Audio C1800 MK-II Preamplifier.

As the M330’s official specifications do not establish a Jensen transformer-coupled balanced input, compatible analogue connections should be confirmed before ordering.

Canary Audio M330 vs M600

The Canary Audio M600 Monoblock Amplifiers represent another step within the company’s 300B amplifier range.

The M600 employs four 300B output tubes per monoblock and is rated at 50W RMS.

It also features a different power supply configuration and additional vacuum tubes.

The M330 remains the more compact, lower-powered design, suitable for systems that do not require the additional nominal output capability of the M600.

Dimensions, Weight and Installation

Each M330 measures 10 inches wide, 17.5 inches deep and 8 inches high.

This corresponds to approximately 25.4 × 44.5 × 20.3cm.

The published net weight is 35lb / approximately 15.9kg per monoblock.

The manufacturer lists power consumption of 240W per amplifier.

Class A vacuum tube amplifiers generate heat during operation. They should be placed on stable, suitably rated supports with adequate airflow.

Never touch hot vacuum tubes during operation, and always follow the manufacturer’s safety and tube replacement instructions.

Canary Audio M330 Key Features

• Class A push-pull 300B monoblock power amplifier
• 26W RMS per monoblock
• Two matched 300B triodes per channel
• Two 6SN7 signal and driver tubes per channel
• Four 300B tubes across a stereo pair
• Massive custom-built power transformers
• Custom-wound output transformers
• 0.72V input sensitivity
• 150kΩ input impedance
• 10Hz–70kHz frequency response, ±1dB
• Manufacturer-rated THD below 0.4%
• Damping factor of 12
• 4Ω and 8Ω loudspeaker connections
• Dedicated independent monoblock chassis
• Handcrafted in California, USA

Canary Audio M330 Technical Specifications

Specifications are based on Canary Audio’s official M330 product information. Electrical figures, dimensions, weight and tube complement refer to each monoblock unless otherwise stated. Manufacturer specifications are subject to change without notice.

Official Manufacturer Information

Canary Audio M330 Official Product Page

Canary Audio M330 Official User Manual (PDF)

Canary Audio M330 Frequently Asked Questions

What is the Canary Audio M330?

The M330 is a Class A push-pull 300B vacuum tube monoblock power amplifier rated at 26 watts RMS.

How many 300B tubes does each M330 use?

Two matched 300B tubes per monoblock, making four 300B tubes for a stereo pair.

Is the M330 single-ended?

No. The M330 uses Class A push-pull amplification.

What is the total vacuum tube complement?

Each monoblock uses two 300B output tubes and two 6SN7 signal and driver tubes.

How much power does the M330 produce?

The manufacturer’s published output rating is 26W RMS per monoblock.

What is its input sensitivity?

0.72V for full rated output.

What is the input impedance?

150kΩ, according to Canary Audio.

Can the M330 drive 4-ohm loudspeakers?

The amplifier provides 4Ω and 8Ω output connections. Suitability depends on the loudspeaker’s complete impedance and sensitivity characteristics.

Can I connect a DAC directly to the M330?

A DAC may be suitable only if it provides safe and compatible variable analogue output with suitable volume control. A dedicated preamplifier is the more conventional system arrangement.

Does the M330 have a balanced XLR input?

A Jensen transformer-balanced input is not specified in the published M330 information. Confirm the available input connectors on the selected unit before ordering.

What is the frequency response?

Canary Audio specifies 10Hz–70kHz within ±1dB.

How does the M330 compare with the M350?

The M330 uses two 300B tubes per monoblock and delivers 26W RMS. The M350 uses four 300B tubes and delivers 50W RMS per monoblock.

Has the M330 received independent listening coverage?

Yes. Stereo Times reviewer Key Kim describes his listening experience with the M330 in his published M350 review. It is not a dedicated full M330 review.

How heavy is each M330?

Approximately 15.9kg per monoblock, excluding packaging.

Where is the M330 manufactured?

Canary Audio states that the M330 is handcrafted in California, USA.

Can I select different finishes or tubes?

The Chameleon Audio product listing includes selectable colour and tube variations. Confirm available options and package contents before purchasing.

Why Choose the Canary Audio M330 Monoblock Amplifiers?

The Canary Audio M330 Monoblock Amplifiers combine the enduring appeal of the 300B triode with the greater power output of Class A push-pull amplification.

With 26W RMS per channel, dedicated custom-wound transformers, a straightforward four-tube configuration per chassis and handcrafted American construction, the M330 is designed for carefully matched high-end audio systems.

For enthusiasts who want a dedicated pair of 300B monoblocks without moving to the larger 50W designs, the M330 offers a distinctive and technically focused alternative.

Two 300B Triodes per Monoblock. 26 Watts RMS. Class A American Tube Engineering.

Canary Audio M330 at Chameleon Audio

Available configurations and final pricing depend on the selected finish and tube options. Contact Chameleon Audio for current details, matching advice and international shipping.