CA-M300 300W Monaural Amplifier
Information
Our Delta series amplifiers embody all that Classé represents: innovation, technological achievement, consummate craftsmanship, and iconic design. But they are not just the latest in the distinguished line of Classé amplifiers to be launched since 1980. They are new, revolutionary and unique.
Performance first
The original Delta series amplifiers won more than critical acclaim. Elite audio professionals use them to master music and movies that the whole world has enjoyed. Our newest amplifiers are even better. Objectively, pure technical measurements prove they deliver our highest performance ever. Subjectively, they simply blow audiences away.
The Classé design team has created the ultimate environment to amplify an audio signal. The entire amplification process occurs on a single board, creating the most direct and transparent signal path conceivable. Our uniquely miniaturized driver stage is virtually noise free, so every nuance of the original signal reaches the output stage. Here, vast quantities of clean power are controlled with absolute precision. Suddenly, the world’s finest speakers sound even better.
Performance fast
There is a relationship between temperature and performance but it is widely misunderstood. Audiophiles say that optimal performance is obtained when an amplifier is “warmed up,” but what does this actually mean? When is it warm enough and when is it too warm?
The exposed heatsink fins found on conventional amplifiers are passive.They can’t help circuits reach their ideal temperature or keep them there throughout a listening session. They run at a temperature wholly defined by their environment and how loud they are playing. This can be far from ideal.
Heat management in Classé’s new Delta series amplifiers is provided by the ICTunnel™ (pronounced Icy Tunnel), a sensor- and microprocessor-controlled technology inspired by the heatsinks found in high-power laser and medical equipment. Mounted inside the unit, the ICTunnel™ actively regulates the amplifier temperature to ensure both optimum performance and reliability.
From room temperature, the amplifiers warm up fast. They reach their ideal temperature in less than fifteen minutes and remain there regardless of how hard they are driven. No conventional heatsink can do this.
In a Class by itself
Ground-breaking performance, prodigious power, sophisticated control and rock-steady reliability—Classé’s new Delta series is a giant leap in amplifier design. Thanks to exclusive ICTunnel™ and audio technologies, only Classé amplifiers can consistently deliver top performance and reliability in every installation.
Specifications
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All tests un-weighted and 500kHz measurement bandwidth (except SNR). |
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Frequency response |
1 Hz – 100 kHz, -3dB |
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Output power |
300W rms into 8Ω (24.8 dBW) |
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Harmonic Distortion |
<0.002% at 1 kHz balanced |
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Peak Output Voltage |
150V peak to peak, 53V rms no load |
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Input Impedance |
50kΩ balanced / single ended |
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Voltage gain |
29dB balanced / single ended |
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Input level at clipping |
1.88V rms balanced / single ended |
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Intermodulation |
>90dB below fundamental into |
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Signal to Noise Ratio |
-116dB at peak output into 8Ω |
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Output impedance |
0.015Ω @ 1 kHz |
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Standby power |
< 1W |
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Rated power |
420W @ 1/8th power into 8Ω |
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Width |
17.5” (444mm) |
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Depth |
17.52” (445mm) (excluding connectors) |
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Height |
8.78” (223mm) |
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Gross weight |
87 lb (39.5 kg) |
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Net weight |
75 lb (34.0 kg) |
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Mains voltage |
Specified on rear panel |
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Firmware
- Current Version: V1.09
Last Updated:
• 27 April 2012 (Front Panel Software)
• 2 April 2010 (Heatsink Software)
How to check the current Firmware of your Delta II Series Amplifier
- The first option is through CAN-Bus. In that case, the amplifier must be connected to another Classé unit that has a TFT Touch Screen (like the SSP-800 or Sigma SSP). Press MENU > STATUS > MORE to view a list of CAN-Bus devices in the system. Select the amplifier and press SELECT > STATUS to view the current version. If the amplifier does not show up on the CAN-Bus list it should be updated.
- The current Firmware can also be checked through a Classé Diagnostic Utility called Delta_CT_User_Interface_Installer. As it name states, it allows you to access a Delta II amplifier (like this model) through a PC-based interface. Please note that the Utility is only available for PC, due to limitations imposed by the Communications module.
Is a Firmware Update important?
Yes, a Delta II Amplifier Firmware Update solve issues that are found "in the field". Improvements can range from increasing the span of time between filter cleaning warnings, to important adjustments in soft start timings and shut down timings.
How to update Delta II Series Amplifier Firmware
This Firmware update must be transferred from a local Windows PC to the unit using the “Classé Amploader 3.5” utility. The Classé Amploader 3.5 utility is a small standalone application that can run from your computer's Desktop or your Program Files folder. It is included in the ZIP archive.
In most cases there are TWO software components to update: The so-called "Front Panel" (which holds the operating software to the unit) as well as the "Heat Sink" (which deals with equal temperature, and other Heat Sink considerations),
Both must be updated. Make sure to update the Front Panel Software FIRST, prior to updating the Heatsink Software.
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Home Automation
All Delta II amplifiers can be controlled via CAN-Bus, DC Trigger (in-out), IR in-out and via RS232. The latter is available via a DB-9 connector on the rear panel.
IR Remote Control Codes
- CA / CT Amplifiers - IR Codes.pdf | HEX Codes.pdf
All Delta II Amplifiers can be controlled using RS232, a protocol used by Home Automation Systems like Crestron, Control 4, etc. Delta II Amplifiers are equipped with a DB-9 connector.
Voltage
- The Sigma 2000i can operate on AC Voltages between 110V - 240V.
- Make sure to change the AC Fuse (rear) to match the AC Voltage of your country.
When you change the fuse to accomodate a different AC Voltage, please contact Classé to obtain a new sticker for the back of your unit that indicates the newOperating Voltage. Without this, another user/customer might make a mistake in the AC Voltage and Fuse Value.
Fuse
- The Sigma 2200i has one fuse accessible via the rear panel;
- Make sure that the AC Fuse corresponds to the AC Voltage offered;
Fuse Specifications
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For 100-120 Volts
Fuse Value: T6.3AH 250V
Description: IEC time lag, high breaking capacity, 6.3A 250V
Classé Part No. 51764877-00 0
Schurter Part No. 0001.2512
Littlefuse Part No. 21506.3
- For 220-230-240 Volts
Fuse Value: T3.15AH 250V
Description: IEC time lag, high breaking capacity, 3.15A 250V)
Classé Part No. 51764794-00
Schurter Part No. 0001.2509
Littlefuse Part No. 2153.15
Image Gallery
Drawings 2D/3D
- CA-M300 - 2D Drawing.pdf
- CA-M300 - Back Panel Drawing.pdf