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A basic single amplifier system is shown in figure 1. DECK Figure 1. Basic Single-Amplifier System Using Existing Speakers (1) Adding Equalization. To improve the system even more, you could add an equalizer, such as an ORION 300 PRQ Pre Amp Equalizer, 600 EQM Equalizer, or 500 PMQ Parametric Equalizer (see page 6). The equalizer would be inserted in the system between the deck and the amplifier as shown in figure 2. DECK RCA Cables DIN Cable ORION 300 PRQ PRE AMP EQUALIZER Speakers Righ