M8s-500s 500watt/channel power amplifier

M8s-500s 500watt/channel power amplifier


The M8s-500s can drive just about any loudspeaker you choose. It is, of course, the perfect partner/visually and sonically for the M8s preamp

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The M8s-500s can drive just about any loudspeaker you choose. It is, of course, the perfect partner/visually and sonically for the M8 preamp

The M8s-700 has received outstanding reviews and an enthusiastic reception from knowledgeable audiophiles. The combination of high power and cutting edge technical performance has proved a compelling combination. However some customers do not have the space for two large monoblocs and do not necessarily need that much power. For them we have designed the M8s-500s. Pairing it with the matching M8 Preamp gives an amplification system fit of the highest levels of reproduction.

M8s Series – Maximum Performance For Minimum Cost

The primary design brief for the M8 Series was to achieve maximum performance for minimum cost. To do this, we studied how costs are allocated between the groups of components that make up an amplifier, namely:

Electronic components such as resistors, capacitors, transistors, transformers, etc.
Heatsinks (for power amps)
Front panels
General metalwork

Electronic components

Electronic components are relatively low cost. Top quality commercial components are abundant and easily available at competitive prices. You can get a lot of them for a few tens of pounds. Because of this, the quality of a circuit is not determined by the quantity or quality of components, but by the skill with which they are used. In other words, it is circuit design and PCB layout that are crucial to performance. In an expensive amplifier the electronic components are an insignificant proportion of the total cost.


Though necessary, heatsinks do not contribute anything to sound quality. Although they are costly, their size and cost should be directly related to the power. If straightforward extrusions are used, the costs are directly proportionate to the power. As soon as you move into the realm of fancy, custom-machined heatsinks, the costs are disproportionately enormous – for no contribution to the sound quality.

Front Panels

Front panels are another matter entirely. They do not contribute anything to a sonic performance and can cost an absolute fortune. Machining and finishing are very expensive.

General metalwork

General metalwork costs are conceptually similar to heatsinks and front panels.

When you analyse where the money goes, all expensive, high-end amplifiers have at least 98% of their cost in front panels, metalwork and heatsinks.
M8 Series Front Panel

We can see that they may look chic, some of them technical and most of them are exquisitely finished. We like fancy metalwork as much as anyone else, but it is unbelievably expensive. The question we ask ourselves is: Does any of this expensive metalwork contribute anything at all to the sound quality? The answer is: No, it does not.

With the vast majority of high-end amplification, what you are buying is fancy-looking metalwork (jewellery you might say). It may be beautifully designed and finished. It may impress your friends. But, in truth, it is only show with no effect on the true performance.

We at Musical Fidelity fervently believe that the reason the M8 Series exists is to offer top quality, state of the art performance at an intelligent price. To achieve this, the metalwork, front panels and heatsinks are purely functional.

  1. The front panels are nicely finished custom made extrusions. There is nothing excessive. They are simply well made, functional, attractive front panels at minimum cost.
  2. The heatsinks are custom made Musical Fidelity extrusions. They are nicely finished but with no excessive design nor any costly surface finishes. They are purely functional.
  3. AS with the front panels and heatsinks, the metalwork is designed for functionality with no excess.
  4. The M8s are almost Puritan in their dedication to delivering performance in a straightforward, nicely finished, honest package.

If you like fancy looking Hi-Fi, machined front panels, peak meters, heatsinks machined from exotic materials and all the other vocabulary of high-end excess, then the M8 Series is not for you. Sorry, that’s the way it is.

On the other hand, if you are interested in maximum musical and technical performance, and are not into Hi-Fi jewellery and display, then the M8 Series is made with you in mind.

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At Len Wallis Audio, whether you’re purchasing in store, over the phone or online through our ecommerce store, we want you to be completely satisfied with your purchase.

Our Refund, Return and Repairs Policy is here to clarify any concerns or questions you might have prior to you making a purchase from us. This way you can be sure of our policy on refunds, returns and repairs and your rights under the Australian Consumer Law.

We also recommend you immediately inspect any goods that you receive from us to ensure you are completely satisfied with the goods, including that the goods are of acceptable quality, and match the description we have provided to you.

If you have any questions about this policy, please contact us at sales@lenwalluisaudio.com.au or 02 9427 6755

We require a receipt or proof of purchase.

  • Please do not send your purchase back to the original manufacturer.
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    • Any item not in its original condition, is damaged or missing parts for reasons not due to our error
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Consumer Guarantees and Your Rights under the Australian Consumer Law

Refer to our page for more information.

Goods Damaged in Transit.

If any goods arrive damaged, please contact us as soon as possible. Len Wallis Audio will arrange to have the damaged goods returned and either arrange for a replacement of the goods or refund the price to you. Damaged goods must be returned in the condition received by you with all original packaging, accessories and/or manuals.


Refunds will be normally be processed within five (5) days.

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If any goods cannot be easily returned to us due to their size, the fault or because they have been affixed or installed in your premises, please contact us and we will arrange an inspection to assess the goods.

Goods returned for repair will be assessed and/or repaired within a reasonable time. You may be provided with an indicative repair time, which time may vary due to reasons beyond ours or the repairer’s reasonable control, such as part availability and incorrect fault description.

You may be required to pay labour, assessment and/or freight fees, such as where goods are assessed to have been damaged by misuse or accident, or where your rights under the Australian Consumer Law or any manufacturer’s warranty do not apply. We may provide you with an indicative fee, which may vary due to reasons beyond our control.

If any goods that you return are capable of retaining user generated data such as files stored on a hard drive, and songs stored on a portable media player, the replacement or repair of the goods may result in loss of the data. In these circumstances, we recommend you back up data to prevent data loss, and remove sensitive or confidential data, as a party assessing and/or repairing your goods may be required to view data in the course of carrying out the assessment. We will not be responsible for any data loss.

In some circumstances, goods presented for repair may be replaced by refurbished goods of the same type rather than being repaired. Refurbished parts may be used to repair the goods.

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Where you have any questions or concerns relating to your Order, please immediately contact us

We understand that sometimes you may simply change your mind about a purchase or have made a wrong selection. In these situations, you have 14 days in which to return your item for a refund, exchange or store credit. If more than 14 days has passed since your purchase we can’t offer you a refund, exchange or store credit.

To be eligible for a return, refund or store credit your item must be in the same condition that you received it. Which is to say, it must be in the original unopened packaging, and in ‘brand new’ saleable condition.

Please note that current Australian Consumer Law does not require us to offer a ‘Change of Mind’ refund. Rather Len Wallis Audio offers 14 day ‘Change of Mind Policy’ in good faith. For more information on consumer rights and guarantees, please visit the Australian Competition and Consumer Commission web site.