Ravensbourne Stereo Series II (2)

Rogers did not officially rename the amplifier as MkII or Version 2.
The changes were evolutionary rather than a complete redesign. The core circuit design remained largely the same as the earlier version throughout its production run, with the most significant change being the increase in power output for later models.

Here are the main differences:

Power output:

• Early models (1967-1968) were advertised at 25W + 25W into 8 ohms.
• Later models (1973) were advertised at 35W + 35W into 8 ohms.

Front panel changes:

• The 6-9 kHz filter markings differed between early and later versions.
• The volume, bass, treble, and balance knobs were different.

Headphone socket:

• Early versions used a 5-pin DIN socket for headphones.
• Later versions changed to a 1/4" stereo socket.

Speaker connections:

• Earlier versions had speaker connector terminals marked 8/15 ohm.
• Circa1973 models had four 15-ohm DIN connectors.

Cosmetic changes:

• In 1973, the minor rotary knobs were finished in bright metal rather than matt brown plastic3.

Production period:

• The original version was introduced in 1967.
• An update was made in 1973.

Unlike other Rogers models like the Ravensbrook, which had multiple iterations, the Ravensbourne was produced in a single series with a significant update in 1973. Production continued until Rogers Developments' bankruptcy in 1975. Subsequently, new owners Swisstone revived the amplifier, offering a refreshed range with minimal internal changes.

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