Cambridge Audio A5 bargain with bonus.

Picked this beauty up at Cash Generators for under £50.

Cambridge Audio A5
Cambridge Audio A5

That in itself is a bargain, but a tatty paper label on the back promised more. Maybe?

These amplifiers, from the turn of the century, were a budget favourite. British designed but made in China, they reviewed very well at the time and sold by the lorry load.

Cambridge A5 Rear panel
Cambridge A5 Rear panel

A look at the back panel gave a clue that this example just might be a little special. All standard stuff, but what is that label next to the aux input sockets?

Cambridge A5. The curious label
Cambridge A5. The curious label

It reads “HONO INP T E FITTE”. I have an idea what this means, but will need to go inside to find out. So, I bought it.

Cambridge A5 Internal layout
Cambridge A5 Internal layout

A quick look at the inside reveals the excellent build quality which explains in part why these amplifiers were so popular. A chunky toroidal transformer supplies good quality juice to the power amplifier board in the middle. A board along the front handles source switching and tone controls. It is the top right corner where the candy lies though.

Cambridge A5 Output and Input Circuits
Cambridge A5 Output and Input Circuits

A dedicated unity gain output buffer ensures it can drive any connected recording device with aplomb. The real treasure though is the daughter board at top right.

Cambridge Audio PM01
Cambridge Audio PM01

This is the PM01 phono module. A great little RIAA MM phono pre-amplifier which was available as an option from the factory, or could be fitted later by your dealer or by yourself. That’s if you can find one. They were originally offered in the A1 integrated amplifier and continued in production, being used in several Cambridge Audio Amplifiers.

This amp is from a time when CD was king. Cambridge designed a magnificent phono stage, but made it optional to keep the headline price of the A5 range amplifiers down for most users who would not need it. The PM01 is now rare and cost about £50 on eBay, should you get lucky

So, it was well worth the £49 I paid for the PM01 alone. That label did originally say “PHONO INPUT MODULE FITTED” as I had hoped.