Mikrofonvorverstärker mit 65 dB Verstärkung

Variable Ausgangspegelsteuerung

Auswahl des 3:1-Ausgangstransformator-Abgriffs

API 2520 Operationsverstärker

Erweiterter variabler Schwellenwert zwischen -20 dBu und +20 dBu

Wählbare Ratio-, Attack- und Release-Zeiten

Der Classic 312 Mikrofonvorverstärker von API in einem Modul der 500er Serie

Analoges VU-Meter im Vintage-Stil

Maximal 69 dB Verstärkung

Klassisches API-Schaltungsdesign

Verwendet API 2520 Operationsverstärker

Variable Ausgangspegelsteuerung

Klassisches API-Schaltungsdesign

Verwendet API 2520 Operationsverstärker

Variable Ausgangspegelsteuerung

Wide Range Gain Control mit 55dB Gain

Hi-Z-Eingang auf der Vorderseite

Frontplatten-Thru-Routing

Genaue Neuauflage des ursprünglichen 525 von API aus den frühen 70er Jahren. Peak-Erkennungs-"Feedback"-Kompressor/Limiter. Variable Schwellen- und Ausgangspegel

Feed-forward or feed-back compression

Hard or soft knee compression

Patented THRUST® switch for frequency-dependent sidechain control

Classic 550b Equalizer design

Two range switches to individually alter gain steps

Usable as a 550b, 550D or 550M

3 bands of classic API equalization

Each band offers 7 API selected frequency centers

Reciprocal and repeatable filtering

10 bands of API proprietary equalization

Familiar graphics operation on one octave centers

12 dB of boost/cut per band

Four bands of our famous sounding equalization

Each band offers seven API selected frequency centers

Reciprocal and repeatable filtering

Field Effect Transistor (FET) based gain reduction circuit

Audio circuit uses 12AT7WC and 12BH7, dual-triode vacuum tubes

Custom proprietary API output transformer

All-tube, Class-A microphone preamplifier

Proprietary AP2516 input transformer

Audio circuit uses 12AT7WC and 12BH7, dual-triode vacuum tubes

Patented THRUST® circuit

Variable Threshold, Ratio, and Make-up gain controls

Classic analog VU meters

4 bands of equalization modeled after the classic APSI model 562 EQ

Each band offers continuously variable control of frequency and gain, using separate knobs

12 dB of boost/cut per band

Continuously variable detented Gain, Threshold, Attack, Ratio and Release controls

10 segment LED meters show Gain Reduction and selectable Input or Output Level

Over Threshold LED

Continuously variable detented input level trim

Polarity button

20dB Input Pad