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Infinity

$20.00 off

Infinity Primus 503F 5.25" Coaxial Speakers

$69.99 $89.99

Shipping calculated at checkout.

Key features

Speaker size: 5.25″
RMS power per speaker: 40 W
Speaker impedance: 3.0 ohms
Frequency response (-6 dB): 75 Hz–20 kHz
Sensitivity (2.83 V/1 m): 91 dB
Crossover: 6 kHz, 6 dB/octave

Description

The Infinity Primus 503F is a 5.25-inch, 3-ohm coaxial speaker pair rated for 40 watts RMS and 120 watts peak. Its frequency response is 75 Hz–20 kHz.

Plan the speaker installation

A coaxial layout keeps the high-frequency driver with the woofer, avoiding the need to select a separate tweeter mounting location. Check the mounting opening, available depth and connector arrangement against your vehicle. Nominal speaker size alone does not guarantee a direct fit. Confirm that the source unit or amplifier supports the speaker load before connecting it.

Need an amplifier to run these speakers?

Compare car-audio amplifiers by channel count. Ratings shown at 4 Ω. Check your speakers’ impedance and RMS power before choosing an amplifier.

2-Channel Amplifiers

50–125W RMS per channel at 4 Ω

Rockford Fosgate Prime R2-200X2 2-Channel Amplifier

50W × 2 RMS at 4 Ω

$239.99
Rockford Fosgate Punch P300X2 2-Channel Amplifier

100W × 2 RMS at 4 Ω

$279.99
Rockford Fosgate Punch PBR300X2 2-Channel Amplifier

100W × 2 RMS at 4 Ω

$279.99
DS18 G700.2 GEN-X Full-Range Class D 2-Channel Amplifier 700 Watts

100W × 2 RMS at 4 Ω

$155.99

4-Channel Amplifiers

50–125W RMS per channel at 4 Ω

Audio Control A600.4 ALTITUDE 4-CHANNEL AMPLIFIER

100W × 4 RMS at 4 Ω

$319.99
SoundQubed S4-100 S Series 4 Channel Amplifier (175x4)

100W × 4 RMS at 4 Ω

$299.99
JBL Club A754 4-Channel Car Amplifier

75W × 4 RMS at 4 Ω

$319.99
Rockford Fosgate Prime R2-500X4 4-Channel Amplifier

75W × 4 RMS at 4 Ω

$359.99

6-Channel Amplifiers

Actual 4 Ω ratings shown for each amplifier

Sundown Audio SALT-2000.6 6-Channel Amplifier

100W × 2 + 150W × 2 + 200W × 2 RMS at 4 Ω

$999.99

8-Channel Amplifiers

Actual 4 Ω ratings shown for each amplifier

JBL DSP4086 8-Channel Class-D DSP Amplifier

40W × 8 RMS at 4 Ω

$499.99
Wāvtech link1400.8plus 1400 Watt 8-Channel Amplifier

100W × 8 RMS at 4 Ω

$899.99