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RE Audio BT900.4 OPEN BOX COMPLETE

480W RMS 4-Channel BT Series Class AB Bluetooth Car Amplifier

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RE Audio BT900.4 OPEN BOX COMPLETE

480W RMS 4-Channel BT Series Class AB Bluetooth Car Amplifier

$199.99

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Bluetooth Sound without the Headunit

Have you ever wanted to add Bluetooth functionality to your car without opening up your dash and installing a costly new headunit? The new RE Audio BT900.4 Bluetooth amplifier allows you to do just that. This innovative 4-channel 480 watt RMS amp has integrated Bluetooth so you can stream your favorite music straight to your sound system, no headunit required. The Bluetooth has outstanding range, allowing you to stream your music from across a parking lot if you ever want to show off. An RCA input also allows the BT900.4 to be used as a traditional amplifier with your headunit. With on-board overload, short circuit, over heat and under voltage system protection, this amp will be a perfect, long term addition to your sound system. Being unable or unwilling to install a new headunit in your car is no longer an excuse to not have Bluetooth!




Sonic Electronix Power Certified Amplifier

RE Audio's BT900.4 4-channel amplifier is a Sonic Electronix Certified Amplifier. This amp's power output has been professionally tested with our SMD Amplifier Dyno, bringing you it's true power ratings. Learn more about this amp's Sonic Electronix Certified Power Here!

Impedance
Claimed Output
Certified Results
Dynamic Results
4 Ω
80 @ 14.4v
145W @ 14.77v
277W @ 14.83v
2 Ω
120W @ 14.4v
155W @ 14.83v
167W @ 14.85v
1 Ω
230W @ 14.4v
95W @ 14.87v
97W @ 14.90v



Item Condition: Open box complete

  • Item has been Installed and Used
    • General Features:

      • BT Series 4-Channel Bluetooth Class AB Car Amplifier
      • RMS Power Rating:
        • 4 ohms: 80 watts x 4 chan.
        • 2 ohms: 120 watts x 4 chan.
        • Bridged, 4 ohms: 230 watts x 2 chan.
      • Sonic Electronix Certified Power Rating*:
        • 4 ohms: 145 watts x 4 chan.
        • 2 ohms: 155 watts x 4 chan.
        • 1 ohms: 95 watts x 4 chan.
      • Built-in Bluetooth allows you to bypass connecting with your headunit
        • Works with most Bluetooth enabled devices
        • Bluetooth Range: Up to 30 feet (10m)
        • Intelligent switching between Bluetooth® and RCA signal
        • Automatic Bluetooth® on and off
        • Bluetooth antenna included
      • Accepts Bluetooth audio signal and RCA input
      • Intelligent switching between Bluetooth and RCA signal
      • Bluetooth audio and remote turn on signals can be passed to other amplifiers
      • 4 or 2 channel operation
      • SMD dedicated audio chip device
      • Full MOSFET DC-DC PWM power supply
      • ROHS compliant production technique
      • Variable high-pass filter: 50 - 500 Hz
      • Variable low-pass filter: 50 - 500 Hz
      • Input Level : 0.2 V ~ 5 V
      • Frequency Response: 10 - 3,500 Hz
      • Sampling Frequency: 44.1 KHz
      • Radio Frequency: 2.4GHz
      • Total Harmonic Distortion: < 0.1%
      • Signal to Noise Ratio: > 90dB
      • Channel Separation: > 60dB
      • Bluetooth Receiver Sensitivity: < -80dBm
      • Overload, short circuit, overheat and under voltage protection
      • 8 gauge power and ground wiring is required for installation
        • Contact us for information regarding a discount on select amplifier kits from our website when purchased together with this amplifier
      • Dimensions: 7.4"W x 12.6"L x 2.2"H
      • Marinised version available: RE Audio BT900.4M
      • Authorized Internet Dealer
      • 1-year Manufacturer's Warranty

      *The Sonic Electronix Certified Power Ratings listed are based on a test of a specific sample amplifier. Actual power ratings may slightly vary between amps.

    Power Specifications - Full Range Channels

    RMS Power @ 4 ohms

    The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far.

    If the final impedance of your speakers or subwoofers equals 4 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound.

    80 watts x 4 channels
    RMS Power @ 2 ohms

    The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far.

    If the final impedance of your speakers or subwoofers equals 2 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound.

    120 watts x 4 channels
    Bridged RMS Power

    Bridging refers to combining two channels on an amplifier to create one channel with double the voltage and an increased power output. A 2-channel amplifier will bridge down to 1-channel and a 4-channel amplifier can bridge to create 2-channels. An amplifier is most commonly bridged to drive a subwoofer.

    Remember, once you bridge two channels down to one its final impedance will be 4 ohms unless otherwise specified. This rating lists the RMS power created once an amplifier is bridged.

    240 watts x 2 channels

    Amplifier Specifications

    Amplifier Class

    An amplifier increases the power of the signal being fed to it by taking energy from its power supply and matching the signal but increasing its amplitude. Amplifiers use many different methods for converting these electrical signals and have been categorized into classes.

    Class A/B: Greater than 50% of the input signal is amplified while the other percentage is “off”. These amplifiers have a small amount of current flowing through the output transistors all the time which almost eliminates crossover distortion. Class A/B has great sound quality but is not as efficient as class D. These amps are most commonly used to drive speakers.

    Class D: Also known as switching amplifiers, class D amps have output transistors that are completely turned “on” or “off”. This means that when the transistors are on, there is almost no voltage across them but when they are off there is significant voltage but no current flowing through it which makes these amplifiers very efficient at the cost of sound quality. These amps are most commonly used to drive subwoofers.

    Other Classes: You may see classes such as GH, bD, X, FD, etc. by some manufactures. These amplifiers tend to be either class A/B, D or a hybrid of the two but with improvements to their designs that can make them more efficient or offer better sound quality.

    AB
    Number of Channels
    Each channel on an amplifier will power one speaker using a positive and negative cable. There are various types of amplifiers, each designed to power a certain number of speakers. Monoblock amplifiers, also known as single channel, are designed to power one or more subwoofers. These amplifiers often have very high power ratings. On the other hand, multi-channel amplifiers power multiple speakers, usually at lower power ratings. 2-Channel and 4-Channel amplifiers can power car speakers or low powered subwoofers. Occasionally you might see a 5 or 6-channel amplifier that can power speakers and subwoofers at the same time. The most common setup is a monoblock amp to run subwoofers and a 4-channel amp to run door speakers. Check out our Knowledge Base for more information.
    4
    Total Peak Power Output
    The total peak power output is measured as the wattage per channel multiplied by the number of channels, and is calculated at the lowest level of operating impedance.

    It is measured during a brief musical burst, such as a sudden drum accent. Some manufacturers display peak power ratings on the face of their products to increase the appeal.

    The RMS power rating is more accurate, and we recommend using it for product comparison.

    480 watts
    Total RMS Power Output
    Total RMS power is measured by multiplying RMS power per channel by the number of channels, and is calculated at the lowest level of operating impedance.

    RMS power is the amount of continuous power, measured in watts, that an amplifier produces is called RMS power. The higher the RMS figure, the louder and cleaner your music sounds.

    The RMS output figure is much more accurate than the peak rating when comparing products.

    320 watts
    Maximum Input Gauge Size
    This is the largest gauge wire that will fit into the power and ground terminals of this device. The lower the gauge number, the thicker the wire is. For example, a 4 gauge wire is thicker than an 8 gauge wire and thus has higher current carrying capacity. Always do your best to get this size wire to reduce the risk of damage to your components.
    8 AWG
    Minimum Impedance Unbridged
    The lowest impedance the amplifier will handle when it is not bridged.
    2 ohms
    Minimum Impedance Bridged
    The lowest impedance the amplifier will handle when it is bridged.
    4 ohms
    THD at Rated RMS Power
    The amount of change in harmonic content of the signal as it is amplified. A lower figure indicates less change and a more accurate amp. THD below 0.10% is inaudible.
    <0.1%
    Speaker Level Inputs
    Speaker level inputs are commonly referred to as high-level inputs and vice versa. This input type allows you to get your audio signal directly from the speaker wire in your vehicle, instead of using RCA cables. The advantage of this is factory integration, as most stock radios do not have RCA outputs to run amplifiers.
    Yes
    Preamp Outputs
    Many amplifiers are equipped with RCA preamp outputs which pass the original music signal from the source to additional amplifiers. This is known as daisy chaining because the source connects to the first amp, and the first amp connects to the second amp, etc. The advantage to daisy chaining is you only need one 2-channel RCA cable to transfer the signal from the head-unit to the amplifier, and then one additional cable for each amp being daisy chained.
    1 pair
    Built-in Crossover

    A crossover is a type of filtering system that permits only certain frequencies to play. A Low-Pass (LP) crossover allows only frequencies below its setting to get through which is good in the case of some subwoofers. A High-Pass(HP) filter allows frequencies above its setting to pass through, this is normally used on speakers.

    When a crossover is set to FULL it means no filtering is added and the full frequency spectrum is allowed through the amplifier. Filtering is important because feeding a speaker frequencies it cannot reproduce effectively creates distortion.

    Low-Pass (LP)
    High-Pass (HP)
    High-Pass Crossover Frequency
    The high-pass crossover frequency can be a fixed crossover point or a variable crossover range. A variable high-pass crossover allows you to select a specific crossover point which allows frequencies above the set crossover point to pass, while making frequencies below the set point gently or harshly roll-off, depending on the steepness of the slope.

    The steepness of the roll-off slope is measured in dB/octave and refers to the rate of attenuation (lowering of volume) outside their pass bands.

    50 - 500 Hz
    Low-Pass Crossover Frequency
    The low-pass crossover frequency is typically used for subwoofers. It can be a fixed crossover point or a variable crossover range. A variable low-pass crossover allows you to select a specific crossover point which allows frequencies below the set crossover point to pass, while making frequencies above the set point gently or harshly roll-off, depending on the steepness of the slope.

    The steepness of the roll-off slope is measured in dB/octave and refers to the rate of attenuation (lowering of volume) outside their pass bands.

    50 - 500 Hz
    Signal-to-Noise Ratio
    This spec compares the strength of the signal to the level of background noise. A higher value indicates less background noise.
    >90 dB
    Channel Separation
    Also referred to as crosstalk. The amount of interference on one stereo channel caused by the leaking of the other stereo channel. The higher the rating in decibels (dB), the better the Channel Separation.
    >60 dB
    Sonic Certified Amplifier
    Sonic Certified amplifiers have been tested by the experts at Sonic Electronix to meet or exceed the wattage ratings provided by the manufacturer. If this is marked as Yes, then you can trust the wattage ratings. If marked as No, then we have tested the amplifier and it did not meet the advertised wattage ratings. If marked as Not Tested, then the Sonic Electronix experts have not yet been able to test the amp.
    Yes
    Amp Bluetooth Connectivity
    This feature will tell you if the amplifier has the capability to connect to a Bluetooth device.
    Yes
    Hi-Res Audio Compatible
    This feature refers to if the product is capable of Hi-Res Audio (HRA) playback.

    Warranty and Return Policy

    Parts Warranty Duration
    1 year
    Labor Warranty Duration
    1 year
    Warranty Provider
    Manufacturer

    Summary of Customer Ratings & Reviews

    Rating Distribution

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    Product Summary

    Manufacturer

    Model Number

    LS-BT900.4-OBC

    Weight

    10.00lbs

    Internal SKU

    LS-bt9004-OBCra224195

    Internal Product ID

    98042

    Sonic Electronix Wiring Guide

    Wiring Diagram Legend

    Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

    Product Name: RE Audio BT900.4 OPEN BOX COMPLETE

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