Reminder: how to tell current from an amp's specs?

@builder3

You are not wrong, but this general quick reference rule of thumb is a good quick guide , but is not not an absolute bible .

Sure …. In many cases, you can recognize an amplifier with ample current delivery by looking at its wattage output as impedance decreases. A great amplifier will double down, so 100 watts at 8 ohms becomes 200 at 4 ohms.

BUT ….and its a BIG “but” … There are exceptions to this general “rule of thumb” quick reference guide.

The REGA Osiris integrated amp is one of these exceptions. While it is a beefy hi-current and high WPC amp that doesn’t fully double down, it still has LOTS of current because of its high-end build and design. This is provided by those four Sanken output transistors per channel, that insure that no speaker is too hard to drive.

@atmasphere

“…

The REGA Osiris integrated amp is one of these exceptions. While it is a beefy hi-current and high WPC amp that doesn’t fully double down, it still has LOTS of current because of its high-end build and design. This is provided by those four Sanken output transistors per channel, that insure that no speaker is too hard to drive.

This statement is incorrect. The extra transistors make sure the output section can support the current without damage but if the power transformer lacks the current capacity it really won’t make any difference.

I’m no engineer but it’s still a beefy beast, It’s power supplies are big muthas,

it’s a no compromise, super high performance, 162 W into 8 Ω (250 W, 4 Ω), dual mono amplifier housed in a custom Rega CNC machined aluminium case. It weighs over 54lb.that provides more than enough current to drive the hardest of loads.

The Osiris uses two low noise, purpose designed 400 VA toroidal transformers using high-grade, fully bonded core material. Eight Sanken 200 W output transistors are used in a “triple” high current output stage enabling the Osiris to drive even the most awkward of speaker systems with ease.