Fisher EQ-100

Documentation on the Fisher EQ-100 is thin. No production years, original price or market context have surfaced in the research material. What is known comes from a single equipment listing, and the specs recorded there describe a well-specified 10-band graphic equalizer.

The EQ-100 has the usual ten bands of adjustment. A bypass switch gives you a clean A/B comparison, and a rec/play switch handles tape monitoring. It also has a 25 Hz low-cut filter and a 15 kHz high-cut filter. Connections are simple: two RCA inputs and two RCA outputs, with input and output impedances of 47 kOhm and 1 kOhm respectively. Maximum input and output levels are both 1.5 V.

The numbers are respectable for the era. Frequency response is rated at 20 Hz - 20 kHz (±0.5 dB), signal-to-noise ratio at 98 dB, and total harmonic distortion at 0.005%. Power consumption is a modest 9 W. The unit measures 430 mm x 88 mm x 187 mm (W x H x D) and weighs 3.1 kg.

Beyond its listing in period equipment directories, almost nothing is recorded about the EQ-100. It appears to have been a competent, feature-complete equalizer, but its place in the Fisher lineup remains unclear.

Type: 10-band graphic equalizer
Frequency response: 20 Hz–20 kHz (±0.5 dB)
Signal-to-noise ratio: 98 dB
THD: 0.005%
Filters: 25 Hz low-cut, 15 kHz high-cut
Connections: 2 x RCA in, 2 x RCA out
Dimensions: 430 x 88 x 187 mm (W x H x D)
Weight: 3.1 kg