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500 Series tube equalizer
3-band equalizer that brings old-school tube EQ tone to the 500 Series format
Negative-feedback-based tube amplifiers produce warm, fat, and rich sound
High and low bands are both shelving, and the middle band is a resonant peak EQ
Insigna is a tube equalizer in a 500 Series package, using a dual triode circuit with a 12AX7 tube It has three bands and filters.
The EQ has 24 db/oct high pass and low pass filters each with seven frequencies. The top and bottom band are shelving each with eight frequencies. The mid band is peaking with eight frequencies.
The three bands work by using buffered RC circuits in the negative feedback path around the tube amplifiers. The result is a fat sounding EQ rich in second harmonic triode tube color.
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San Juan Capistrano, California
(310) 591 5544 (888) 572 5825
Mexico: (55) 5336 5522 Argentina: (54) 1159 843960
(55) 5350 8559
Chile: (56) 22 93 82432 Puerto Rico: (781) 753 0133
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