The
equalizer module
is a three-band, sweepable frequency design using two discrete op
amps and a second output transformer. Inspired by a late seventies console that became a cult
classic, our spin takes the design to a whole new level. There are 15 center frequencies divided
into three bands (Low, Mid, and High) as shown below:
Low
Mid
High
OFF
OFF
OFF
20 Hz
250 Hz
4.8k Hz
40
500
7.5k
90
1.2k
9k
200
2.4k
12k
40
4.8k
12k (shelving)
Each band features 15 dB of boost or cut with a Q of approximately 1.2. A transformer
ba4 dBu insert point is available post-EQ. Additionally, the EQ section features a
buffered two position second-order high pass filter (12 dB/octave) at 50 and 80 Hz.
Finally, the
output line amp
uses a balanced input stage using another discrete
transformerless amplifier to feed a "fader" with 12 dB of gain "in hand," followed by a
console-style discrete line amplifier with a transformer balanced output.
As with all Iron Age products, the Channel Strip uses the M2 discrete operational amplifier,
designed and built in-house by us.
The combination of the input gain, attenuator, and fader knob gives a wide range of sonic
possibilities, and with up to seven op amps and four transformers in the signal path, you'll
never want for massive mojo. This is Iron Age at its finest!
Through the IAA Custom Shop, we also offer a variety of input transformers, output
transformers, op amps, and even voltages to give you the sound you want. Whether you're
looking for quiet and clear, warm and smooth, or edgy and rock and roll, this channel strip can
do what you need.
Reach out to us with to whiteboard your idea!
©2019 by IronAgeAudioworks
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