So, you’re set to upgrade your car sound and start looking for amplifiers online and suddenly you are confused on what class you’re getting. “Class?” Is there such thing? Apparently yes, and to make easy for you to choose the appropriate amp for your setup, we’ll try to explain common amplifier classes as simple as possible.
This is the simplest form of amplifier. When you drive input signal from your source (stereo), the exact amount of output is reproduced therefore there is no clipping or distortion on the output (sound). In many ways, this class of amplifier produces the best sound but due to the transistors being always “on” and current continuously running, this creates extreme heat which is not ideal for car audio.
This class of amplifiers are slightly different. There are two devices that are built-in and conducts alternating current to amplify both sides (half of each) of the wave cycle. This dramatically increases efficiency of theoretically about 80% compared with Class A. The only disadvantage of this is that since the transistors only amplifies half of each side of the waveform, it tends to produce distortion and results in low audio fidelity.
These amps are a combination of both the Class A and B amplifiers. The transistors are continuously flowing current through but utilize a circuitry that reduces the flow of current when there is no signal present. As a result, there is a higher degree of efficiency compared to a Class A, and less distortion as to a Class B. With this system, the Class A/B amplifiers are the most common form of full range car audio amplifiers.
Among the amplifier classes, Class D is the only “switched” amp commonly used in car audio systems. It is different because unlike Class A, B and A/B; which are analog, Class D operate by quickly switching the current through the transistor on and off. By utilizing this, it creates a pulse-like input signal. Although The Class D amplifiers are indeed more efficient that the three classes, the pulsated signal somewhat creates a small amount of distortion particularly in the higher frequencies. To minimize this, you often use a low-pass filter. Various manufacturers already adapted in using the class D for mono subwoofer amplifiers, but many others are also picking up the benefits of power and size and implementing it on full range speakers as well.
So, now that you are equipped with some basic knowledge of amplifiers, the question now is what class suits your taste. The basic rule of thumb is that Class A/B amplifiers are best for full range and mostly component speakers, while Class D amps are better suited for subwoofer drivers. You can experiment with different brands and classes to really find the sound you are looking for but with this basic template, you’ll be on the right track.
All products mentioned in this blog are available at Onlinecarstereo.com with excellent and competitive prices on our special offers. Just click on the links and and happy shopping.
Just listed a bunch of new Cadence Audio! New products, cheaper prices!
OnlineCarStereo.com has a new inventory of products from Orion Audio! We have tons of amps, woofers, speakers and accessories! More information after the jump!
Todays newly reduced car audio item is the 900W RMS Class D Monoblock D-Tower Car Audio Power Amplifier from Soundstream. Now just $149.00 with FREE shipping, get em while they're hot.
- The worlds first vertical automotive stereo amplifier
- Gloss black finish w/ brushed accents
- Double sided pcb w/ smd components
- aluminum alloy heat-sink
- Regulated mosfet pwm power supply
- Three-way protection circuitry (thermal, short, impedance)
- Delayed on/off circuit
- Variable crossovers (hpf/full/lpf)
- Variable bass boost
- Variable subsonic filter
- Variable phase control
- High level input
- Signal-to-noise ratio: 92dB
- Damping factor: >200
- Signal voltage: 200mV-5V
- Harmonic distortion: 0.50%
- Dash mounted remote gain control
- Direct wire 4ga. Power 8ga speaker terminal
- Dimensions: H: 7.5" x W: 3.375" x L: 11.5"
The best-selling amplifiers of all time are back in black!
The 600/1v3 deploys efficient Class D technology with a patented control circuit and JL Audio's signature R.I.P.S. power supply design to ensure full power delivery (600 W) over a wide range of load impedances and vehicle voltages.
A very complete set of signal processing features, including a parametric bass EQ and fully variable infrasonic filter, round out the package. This amplifier features an all-black look that is pure, sexy evil, including the powder-coated cast alloy heat sink and end caps.
Power Handling @ 12.5V & 14.4V
- 600W RMS x 1 @ 4 Ohms
- 600W RMS x 1 @ 3 Ohms
- 600W RMS x 1 @ 2 Ohms
- 600W RMS x 1 @ 1.5 Ohms
- 600W Peak Power
- R.I.P.S. - Regulated, Intelligent Power Supply
- Advanced Rollback Protection
- Patented Class D Circuitry
- Frequency Response: 5 Hz - 250 Hz (+0, -1dB)
- S/N Ratio, referred to highest rated power: >95 dB below rated power (A-weighted, 20 Hz - 20 kHz noise bandwidth)
- S/N Ratio, referred to 1 W (Main Channels): >68 dB (A-weighted, 20 Hz - 20 kHz noise bandwidth)
- Damping Factor @ 4 Ohms: >500 / 50 Hz
- Damping Factor @ 2 Ohms: >250 / 50 Hz
- THD+N @ Rated Power (Main Channels): <0.05% @ 4 O
- Input Voltage Range @ RCA Inputs: 200 mV - 8 V RMS
- Min Copper Power/Ground Wire Gauge: 4 AWG wire
- Fuse Rating: 50 A (AFS, AGU or MaxiFuse™)
- Filter Modes: Low-Pass only
- Filter Slope (dB/Octave): 12 dB or 24 dB
- Filter Frequency Range: 40-200 Hz
- Detented, Calibrated Filter Freq. Potentiometer: Yes
- Filter Defeatable?: Yes
- Infrasonic Filter: Variable, Defeatable
- Bass Boost EQ: Parametric
- Output Polarity Switch: No
- Remote Subwoofer Level Control: No
- Remote Bass EQ Boost Control: Optional (RBC-1)
- Pass-Through Preamp Output: Buffered, w/independent filter
- Dimensions: 2.36 in / 60 mm (H) x 13.40 in / 340 mm (W) x 9.25 in / 235 mm (D)