McIntosh MC303 Amplifier

Availability: In-Store Only

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Authorized Dealer & Full Factory Warranty

McIntosh MC303 Amplifier

The McIntosh MC303 is our most powerful multi-channel amplifier to date, providing 300 watts into each of 3 channels. It features our renowned Autoformer, which allows its full 300 watts of power to be delivered into 2, 4 or 8 ohm speakers with the lowest noise and distortion performance possible.

The MC303 was designed with the intent to drive a home theater's front left, front right and center channels. As most of a movie's soundtrack is delivered by these three channels, the powerful MC303 provides all the power needed for an amazing in-home theater experience. For surround channels, combine the MC303 with our MC302 or MC152 amplifiers and fully immerse yourself in your movie collection. For music lovers, the MC303 can be used in tri-amping configurations on compatible speakers, such as our XRT1K or XRT2K.

The MC303 shares many notable McIntosh technologies that are found in our other home audio and home theater products, including Power Guard ® that prevents over-driving of the amplifier and the resulting harsh sounding clipping that could damage your speakers. Sentry Monitor is our fuse-less short-circuit protection circuit that disengages the output stage before current exceeds safe operating levels and then resets automatically when operating conditions return to normal. Inputs for balanced and unbalanced cables are available to provide flexibility in connecting to the rest of your system. A triple bank of blue watt meters provides instant recognition of power output (the meters may be switched off for theater use if they conflict with the television or movie screen).

Aesthetically, the MC303 is every bit as McIntosh as any of our products. A polished stainless steel chassis, classic black glass front panel, knobs and custom machined aluminum handles all come standard. Contact your local dealer? to learn more.


Electronic Specifications

  • Power Output per Channel: 300W @ 2, 4 or 8 Ohms
  • Number of Channels: 3
  • Total Harmonic Distortion: 0.005%
  • S/N below rated output: 112dB
  • Dynamic Headroom: 1.8dB
  • Damping Factor: >40
  • Rated Power Band: 20Hz to 20kHz
  • Frequency Response: +0, -0.25dB from 20Hz to 20,000Hz; +0, -3dB from 10Hz to 100,000Hz


  • Remote Power Control: Yes
  • Multi-Channel DB25 Cable: No

General Specifications

  • Circuit Configuration: Push-Pull Complementary Autoformers
  • Circuit Design: Transistor
  • Mono Bridge: No
  • Mono Parallel: No
  • Autoformer: Yes
  • Meters: Yes
  • Meter Light Switch: Yes
  • Balanced Input: Yes
  • Front Panel: Glass with handles
  • Illumination: LED Fiber Optic
  • Chassis Style: Inverted
  • Gold Plated Binding Posts: Yes

Weights & Dimensions

  • Dimensions (W x H x D): 17-3/4" (45.09cm) x 12-3/8" (31.43cm) (including feet) x 22" (55.88cm) (including front panel and cables)
  • Weight: 155 lbs (70.3 kg)
  • Shipping Weight: 180 lbs(81.6 kg)

We are in the business of creating satisfied customers. We hope you love your purchase, but in the event that you are not satisfied, you may return unopened and unused items within 30 days for a full refund of the purchase price.

In the event that merchandise is not in its original condition, has been opened, or is missing packaging, manuals, accessories or other components a partial refund will be given.  Partial refunds are calculated on a case-by-case basis but incur a minimum 15% restocking fee.

Items ineligible for return: furniture and other oversized product shipped via a Motor Freight Carrier or scheduled delivery, televisions larger than 32”, in-ear headphones, special order items, and any item that has been permanently modified (e.g. spliced wires or custom order cables).

Three Simple Steps:

1. Give us a heads up: Please call 631-585-5600 or email to let us know you’d like to return an item. We will give you a RA number (Return Authorization) to include with your order.

2. Ship it back to us: Please pack the product in its original packaging with all original contents and use the original shipping carton and packing materials. Safely and completely packaged returns are less likely to incur a damage or restocking fee. Please consider insuring and tracking your item as you are are responsible for the item until it reaches our warehouse.

Return Address:
Audio Den
Attn: Returns
RA# (Insert RA #)
2845 Middle Country Road
Lake Grove, NY 11755

3. Sit tight! We will process your return as quickly as possible and issue a credit by the original payment method. Depending on your credit issuer, it may take as long as 10 days for the refund to post.


    All orders are shipped within 48 hours Monday - Friday 10am - 6pm.


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    Order Tracking

    If a tracking # is provided by the shipping carrier, we will update your order with the tracking information. Please note that some orders using 1st Class USPS mail will not have tracking numbers.

    Shipping Rates

    The rate charged for the shipping of your order is based on the weight of your products, and your location. Before the final checkout page you will be shown what the cost of shipping will be, and you will have a chance to not place your order if you decide not to.

    Back Orders

    If an item goes on back order we will ship you the part of your order that is in stock. When the item becomes available we will ship you the rest of your order. You will not be charged any additional shipping and handling for the second shipment.