Aiwa AD-6900MK

Not much is documented about the Aiwa AD-6900MK. Period advertising from late 1979 shows it as the AD-6900MK II, a metal-capable cassette deck. Aiwa put it alongside the AD-6700 and AD-L40 as three of its most sophisticated offerings, per Audio (December 1979, p.17).

The deck had Aiwa's "Double Needle Meters," a proprietary design that let you watch peak and VU levels at the same time on a single pair of meters. Solenoid transport controls allowed full remote operation. No independent test measurements, production years or original price have been confirmed from the available period record.

• Metal-compatible cassette deck (AD-6900MK II)
• Double Needle Meters (simultaneous Peak and VU)
• Solenoid controls with remote capability
• Frequency response: 20 Hz–20 kHz (at –20 dB, metal tape, per manufacturer claim)
• Part of trio: AD-6900MK II, AD-6700, AD-L40

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