What's new

Kennedy Ampex topic reply
Mark Gillard Turntables new topic
Termboon Dej-udom Spectral Audio topic reply
David Jacobs Quadraflex 969 specifications
Pharmd52 Optimus topic reply

Armstrong Audio 220

Request the Armstrong Audio 220 brochure
Request the Armstrong Audio 220 schematic
Request the Armstrong Audio 220 owners manual
Request the Armstrong Audio 220 service manual



Advertisement

General information[contribute]

The Armstrong Audio 220 is a power amplifier in the valve amplifier category. It was manufactured from 1963 to 1964.

James Wong (June 15, 2009): Armstrong's 200 range was released in 1963 and comprised of two stereo receivers (226 & 227) and two integrated stereo amplifiers (221 & 222). These units provided good performance in a convenient package and at a competitive price. However there were still enough discerning enthusiasts who wanted the best possible performance and who would continue (at least for a while) to buy separate power and pre amplifier units. And so the A20 power amplifier and its matching Model 25 control unit were restyled and renamed the 220 and 225.

The A20's subdued maroon chassis received a make-over and was finished in a striking bright red enamel with contrasting black handles, similar in shape to those found on the Radford power amplifiers (possibly a coincidence or perhaps Armstrong's were hoping that a little of Radford's prestige might rub off on their own product?)

To obtain a higher performance than the rest of the 200 series integrated and receiver amplifiers, the 220 sported larger output transformers and heftier EL84 output valves in an ultra-linear arrangement. A single ECC83 double-triode was shared by both channels as an input stage with a second ECC83 triode-pair acting as a phase splitter and driver for the output valves. The matching 225 control unit obtained its H.T. and L.T. via a multi-pin connector.

Distortion levels were below 0.1 percent at 1 kHz for all power levels up to 12 watts and a frequency response of 15 Hz - 22 kHz ± 1dB was claimed.

The 220 was to be Armstrong's last separate valve power amplifier and again, it was designed by Ted Rule.

Priced at £24 18s when new, today expect to pay up to ten times that amount for a nice, functioning 220 with pristine or restored examples fetching even more.

Reviews[contribute]

wuxw (June 24, 2018): The Armstrong Audio 220 is a power amplifier in the valve amplifier category. It was manufactured from 1963 to 1964.

James Wong (June 15, 2009): Armstrong's 200 range was released in 1963 and comprised of two stereo receivers (226 & 227) and two integrated stereo amplifiers (221 & 222). These units provided good performance in a convenient package and at a competitive price. However there were still enough discerning enthusiasts who wanted the best possible performance and who would continue (at least for a while) to buy separate power and pre amplifier units. And so the A20 power amplifier and its matching Model 25 control unit were restyled and renamed the 220 and 225.

The A20's subdued maroon chassis received a make-over and was finished in a striking bright red enamel with contrasting black handles, similar in shape to those found on the Radford power amplifiers (possibly a coincidence or perhaps Armstrong's were hoping that a little of Radford's prestige might rub off on their own product?)

To obtain a higher performance than the rest of the 200 series integrated and receiver amplifiers, the 220 sported larger output transformers and heftier EL84 output valves in an ultra-linear arrangement. A single ECC83 double-triode was shared by both channels as an input stage with a second ECC83 triode-pair acting as a phase splitter and driver for the output valves. The matching 225 control unit obtained its H.T. and L.T. via a multi-pin connector.

Distortion levels were below 0.1 percent at 1 kHz for all power levels up to 12 watts and a frequency response of 15 Hz - 22 kHz ± 1dB was claimed.

The 220 was to be Armstrong's last separate valve power amplifier and again, it was designed by Ted Rule.

Priced at £24 18s when new, today expect to pay up to ten times that amount for a nice, functioning 220 with pristine or restored examples fetching even more.

Forum topics on the Armstrong Audio 220

Forum topics on the Armstrong Audio 220

No topics on the Armstrong Audio 220 have been found. If you want to start a new topic, click here.