Anthem STR Power Amplifier Black Front View |  Holburn Online
Anthem STR Power Amplifier Black Front View | Holburn Online
Anthem STR Power Amplifier Black Rear View | Holburn Online
Anthem STR Power Amplifier Black Internal View | Holburn Online
Anthem STR Power Amplifier under Anthem STR Pre-Amplifier Black | Holburn Online

Anthem STR Power Amplifier - Pre Loved

Regular price £6,799.00 GBP. Sale price£4,499.00 GBP. Save £2,300.00 GBP.
Tax included. Shipping calculated at checkout.

  • UK Wide Shipping Available
  • Long established Official Retailer
  • Low stock - 1 item left
  • Inventory on the way


Anthem STR Stereo Power Amplifier is at the centre of a championing two-channel system delivering huge amounts of power, in a very stylish package. The Anthem STR is an integral part of Anthem's premium STR Series, class-leaders in control and power.

Two-Channel Revolution

The STR Power Amplifier delivers a huge 400 Watts per channel into 8 ohms when both channels are in operation, a massive 600 Watts channel into 4 ohms, with both channels, and 800 watts in 2 ohms, for true high power performance.

By using two massive transformers and many high-current output devices, the STR manages to effortlessly reveal a recordings details and the dynamic peaks are handled correctly and efficiently. The exterior of the STR has been designed with the final aesthetic being carefully considered, this includes a 7" control display and highly conductive audiophile connectors are a perfect match to the STR Preamplifier.

Cascoded Feedback Stage

The STR Power Amplifier benefits from Anthems own input topology, which is different from the classic differential input stage. The amplifier has the potential for eight low-noise devices, which have been configured in a to reduce distortion, with an exceptionally linear frequency response and superior wide bandwidth. Furthermore, the transistors have been hand selected for the critical stages and matched for the lowest possible distortion.

16 Bipolar Output Devices

The designers at Anthem have added sixteen bipolar output devices per channel, which gives peak production instantaneous and effortless. By using multiple bipolar output devices in class AB design significantly reduces distortion while while maintaining linearity, and an extensive wide bandwidth. With the STR the power and dynamics are huge, you can have 800 watts delivering into 2-ohm loads, 400 watts into 8 ohms, or 600 watts into 4 ohms continuously, with both channels being driven.

Toroidal Transformers

This amplifier has a clean low-profile design which is shaped to minimize hum, the low-impedance toroidal power transformers, with one for each channel, are capable of delivering a continuous supply of power, with low noise.

To maximise and ensure a clean power path the STR has been designed to control for internal cabling inductance and power supply impedance. The amplifier channels are therefore capable of delivering continuous and stable power without any cross interference, even with lowest impedances. The majority of amplifiers have trouble driving lower impedance loads, whereas the STR remains perfectly stable, irrespective of the conditions.

No Rail Fuses

The STR prevents any accidental circuit breaking by employing a sequence-controlled soft turn-on design that significantly reduces transients in the power line and in-rush currents at starting. The amplifiers sections are directly connected to the power supply capacitor bank. By, directly connecting the sections to the power supply, means output impedance is low whilst giving more power to the amplifier. At low or complex impedance loads, the result is an audibly superior level of performance.

Power On/Off Options

In addition to the normal power switching, the STR Power Amplifier allows trigger mode, so the amplifier senses when an audio signal is added, so you the user don not need to switch on the amplifier. The powering automation is useful when using a preamplifier with Home Theater Bypass mode , combined with a surround sound processor in the same system.

Advanced Load Monitoring

The STR uses Anthems ALM technology which continuously monitors the internal temperature, the current and the voltage to ensure the amplifier can be run for extensive periods of time. The ALM technology is not in the signal path, so it does not interfere. Alternatively, ALM starts instantaneously, but only in extreme cases, to protect your speakers and amplifier from any potential damage, and consequently lowers the possibility of blowing a fuse, during an over-current condition. The operating status of the amplifier is displayed on the front panel.

Hand-Built Quality Components

The Anthem STR Amplifiers have been completely created in Canada. Starting from the design stage to the the production process, Anthem controls the whole intricate production process, paying close attention to the details only using high quality components, many of which have been designed and engineered in-house.

Audiophile Binding Posts

With amplifier such as this that has such large power capability, it has been built with large connections, which are bespoke oversized five-way binding posts. The binding posts offer a degree of flexibility, you need for large gauge bare wire connections. The jackets are colour coded with insulated, non-conductive jackets which ensure fast, and solid connections without any potential interference or ghosting.


400W / 600W / 800W continuous into 8 /4 /2 ohms, both channels driven

• Cascoded complementary feedback input stage

• Sixteen bipolar output devices per channel

• Dual Mono Design • Massive toroidal transformers

• Soft turn-on • Four power on/off options

• No rail fuses

• Advanced Load Monitoring™ Technology

• Graphic front panel display for the power meter, status, and easy setup navigation

5 star rated hifi showroom in the UK

Shipping options vary depending on the brand and or size, weight etc of the product. We utilise reputable couriers to ensure your products are delivered as quickly as is possible and safely. For more information please don't hesitate to get in touch with a team member.

Some products will ship from our stock whilst some products are made to order or will ship directly from the manufacturer. These products are labeled "direct from manufacturer"

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

The best in AV & Hifi

Holburn Online is the evolution of our well established HiFi stores around Scotland. We are known for our years of expertise and friendly staff, all who lend a hand to our online presence.

We Enjot great relationships with HiFi & AV manufacturers allowing us to bring the best products to you as official retailers of all the biggest brands.

Our Online Store

Shopping at Holburn Online couldn't be easier. We accept all major card providers as well as offering 0% finance on many of our products.

We ship our products around the UK, ensuring that everyone can have access to the most exciting products whether you want to upgrade your audio systerm or build a cinema room.

Our Trustpilot reviews


A truly excellent service both from the initial contact via the website chat to a personalised telephone call to confirm the chosen product and delivery options. Great and many thanks.


These guys were so helpful! They had a fairly rare item in stock, packaged it up and got it to me in 2 days... very friendly and professional service, would recommend to anyone.


Great shop for vinyl and all things hifi and Audio visual. Staff are friendly and knowledgeable and won’t try and sell you what you don’t need . Recommended!


help line with somebody who was human and helpful when I got stuck setting the amp up. 


I know it's habitual to shop with the big names like Currys. But you won't find anywhere near this level of service from them, and I'll be sure to keep Holburn in mind for the future. Can't recommend them enough!


Recently viewed