System design, Installation | MB QUART RAB 1450 specs

GENERAL INSTALLATION NOTES

System design

The success of any car stereo system relies on several factors, such as the system design, execution of the installation, and system setup. This section is intended to assist the installer by offering several tips and hints about good installation practice. Please remember that any system is only as good as its weakest link.

Determine the system format, e.g., single ampliﬁer, active, front/rear and so on. Then choose the ampliﬁer power points according to personal taste. Please remember that higher power systems are not necessarily useful purely for high sound pressure levels, but also to establish a headroom capability, to reproduce musical peaks cleanly without distortion. Lower power ampliﬁers will clip earlier than their more powerful cousins, and cause loudspeaker failure when overdriven, due to the harmonics generated by a clipped signal, thus overheating voice coils.

Choose loudspeaker and ampliﬁer mounting locations. Loudspeaker location is always a matter of compromise between space and sound stage imaging. Ampliﬁers should be mounted with the ﬁns running vertically for best convection cooling, to minimize overheating.

Purchase the best quality RCA cables you can afford, for reliability and less engine noise interference in the audio system.

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Installation

General:

Mount the ampliﬁer/s in the chosen location.

Run the wiring so that RCA cables are at least 18“ away from power and speaker cables. Keep RCA cables away from electrical devices in the vehicle that can cause electrical noise, such as fuel pumps.

Power and ground connections:

Use a sufﬁcient gauge power cable, at least #8 per ampliﬁer. In a multi ampliﬁer system, it is advisable to mount a large enough fuse right at the battery, and run a master +12 volt power cable to a fused distribution block near the ampliﬁers. It is then a simple matter to connect the +12 volt terminal of each ampliﬁer to the distribution block.

Ground each ampliﬁer with as short a ground lead, again at least #8 gauge, directly to the vehicle chassis. Use a ground distribution block, if you wish, but it is extremely important to keep the main ground lead from this distribution block to the chassis as short as possible, not more than 12“. The ground connection integrity to the chassis is very important, and the best way to achieve a good, solid electrical and mechanical contact is to use a large round crimp lug, crimped and soldered to the ground cable. The next step is to scrape the paint off the vehicle chassis, slightly larger than the ground lug, at the connection point. Drill a clearance hole in the chassis, the same size as the lug hole, and use a bolt, spring washer and nut to securely fasten the ground lug. Use petroleum jelly to coat the bolt/lug connection, to prevent oxidization with time.

TIP: Use the same approach when installing head units, equalizers or any audio equipment for that matter - run short individual grounds from each piece directly to the vehicle chassis, to minimize ground loops and system noise.

All power, ground and speaker connections should be crimped and soldered for reliability. Make sure that none of the cable insulation can chafe against exposed metal in the vehicle, causing short circuits to the chassis.

Safe connection sequence:

After all cables are run, connect speaker wires to the speakers and ampliﬁers, then run and plug in RCA cables. Next, connect all power grounds and remote turn on leads. Now connect all +12 volt cables to the ampliﬁer/s and distribution blocks and fuse holders. Finally, connect the main +12 volt cable to the battery, with the main fuse removed, and we are almost ready to power up the system.

Power up the system:

The following procedure may seem like overkill, but there is nothing more frustrating than turning on a system for the ﬁrst time, and it does not work properly immediately.

First, make sure the head unit is off, and turn all level controls to minimum (anticlockwise), including the head unit volume control. Set all equa- lizers to 0 dB (no boost), and all crossover frequency controls at approximate frequencies, as recommended by the loudspeaker manufacturer. Set all input selector and crossover switches as required for the application.

Remove all ampliﬁer fuses, and insert the main fuse at the battery. If the fuse does not blow, you can insert the fuse in one of the ampliﬁers, and we are ready to turn on the system.

Turn the head unit on, insert a CD, or select a radio station, and increase the head unit volume control. If the system sounds ﬁne, turn off the head unit, and install fuses in the remaining ampliﬁers, one by one, till the complete system is powered up and functioning properly.

RAB 1450 specifications

The MB Quart RAB 1450 is a formidable addition to the realm of automotive audio systems, specifically designed for drivers who demand both high performance and clarity in their sound experience. Known for its robust construction and innovative technologies, this amplifier is an ideal choice for those looking to upgrade their vehicle's audio system.

One of the standout features of the RAB 1450 is its power output. With a peak power of 1450 watts, this amplifier ensures that every note, from the deepest bass to the highest treble, is delivered with exceptional clarity and intensity. It operates efficiently with a Class D design, which not only produces powerful sound but also keeps heat generation at manageable levels. This means that users can enjoy extended listening sessions without worrying about overheating or performance degradation.

The RAB 1450 is equipped with a variable low-pass crossover, allowing users to customize their audio experience by controlling which frequencies are sent to their subwoofers. This feature is particularly beneficial for those who like to fine-tune their sound to match their personal preferences or their vehicle's acoustic characteristics.

Another notable characteristic of the RAB 1450 is its built-in protection circuitry. This feature safeguards the amplifier against potential damage from overloads or short circuits, ensuring a long lifespan and reliable performance. Additionally, the amplifier has adjustable gain control that helps users optimize the output level for their specific audio setup, enhancing both sound quality and clarity.

The construction of the RAB 1450 is designed with durability in mind. Featuring a sleek and rugged chassis, it withstands the rigors of automotive environments. The amplifier also utilizes high-quality components that enhance sound quality and reliability.

Installation is made easy with user-friendly connections and a compact size that fits in most vehicles without hassle. The MB Quart RAB 1450 is not just an amplifier; it represents a commitment to quality and performance, making it an exceptional choice for any audiophile seeking to elevate their mobile sound system.

In conclusion, the MB Quart RAB 1450 stands out in the crowded marketplace of car audio amplifiers with its powerful output, advanced features, and dependable construction. It is a prime choice for those who desire an immersive and customizable listening experience while on the road.