Page 102 of Car Entertainment Guide 2006 by Pioneer UK

glossary dap dynamic amplifier protection this new protective circuitry reconfigures itself according to the output signal level this way the amplifier can apply the best protection level in response to the exact operating conditions at the time speaker level input this allows a pioneer amplifier to be connected to an oem radio without requiring costly add-on adapters the added flexibility allows your pioneer amplifier to be a part of your system as it grows and expands gain control the pioneer gm amplifiers are all equipped with the gain control caution a protective function that prevents malfunction of the unit itself as well as the speakers caused by too much output improper use and improper connection variable bass emphasis allows bass frequencies to be boosted for each equipped amplifier this allows you to set the optimal bass level for the speakers connected to that individual amplifier allowing you to best utilise the headunit s tone controls for all speakers in the system hi-volt inputs all of pioneer s prs series and bridgeable amplifiers have an input level control which is adjustable over 6.5 volts of input signal this means that these pioneer amplifiers can pick up signals from hi-volt headunits or line drivers without any clipping speakers and subwoofer 3-layer fibre woven radial surround the innovative patent-pending 3-layer fibre woven radial surround consists of two outer layers and one inner layer of interwoven fibre this results in an extremely durable and resilient surround which improves the high power capability icepowerŪ amplifier technology by combining the unique com controlled oscillation modulation and the mecc multivariable enhanced cascade control system icepowerŪ amplifier technology manages to increase efficiency considerably and reduce distortion even further than conventional class-d technology irrp independent rail regulating power supply pioneer s spl amplifiers have a different approach to the power supply structure the positive and negative rail voltages are regulated separately this differs from ordinary amplifiers which only regulate the positive rail the negative rail could destabilise during crucial moments resulting in overall performance loss result an ultrastrong and powerful radial edge admg aero-dynamic magnetic gap the admg is designed to overcome the mechanical and air pressure resistance typical of +170 db situations each pole piece and top plate of the admg has an air channel in a narrow magnetic gap which reduces physical resistance by over 10 this leads to greatly improved linearity at high power input input level control level control adjustment is provided to match the amplifier s input with the source unit s output proper adjustment ensures less noise and distortion damper-less air suspension control excursion system link top amplifiers with link top are equipped with output terminals for convenient efficient low noise connection to an additional amplifier driving a subwoofer or to create a multi-channel speaker system an airtight space is built-in between the two cones which enables the main cone to move solidly and smoothly furthermore the drive cone deflects air pressure from the enclosure which results in very tight bass ­ even in a very small enclosure see pg 53 for full details lcd low current density design in pioneer s spl amps current density describes how well the current flows through conductors used in magnetic components such as transformers a low current density signifies that the amplifier s magnetic components have been created to carry the highest possible power this allows the amplifier to run more efficiently and consistently bass reflex a loudspeaker design in which the sound waves generated by the driver s rear surface are allowed to pass through a port in the enclosure to reinforce bass response this enables smaller drivers to offer increased bass response with less power bottom-hold design aluminium die-cast chassis low impedance load capability high current refers to power amplifiers that provide 1 ­ 1/2 times the power output of standard 4 operation at 2 since they have the power to drive more speakers these amps also increase system flexibility by enabling the hook-up of multiple pairs of speakers pioneer s aluminium die-cast basket securely supports the motor assembly and provides excellent damping characteristics to attenuate vibrations quickly and prevent distortion butyl rubber edge mass multi amplifier synchronisation system for those who want to create a multi-amp system prs amps offer synchronised amp control basically the amps are installed in a cascade configuration where the head amp is designated as the `master and the others function as `slave amps this way the synced amplifiers copy the master s settings so that all adjustments made to the master amp are automatically replicated in sync throughout the system eliminating continuous individual adjustments per amplifier the rolled edge where the speaker cone meets the frame is made of a specially blended highly durable and moisture-resistant compound butyl rubber keeps the cone moving in a linear direction and stops the cone from vibrating this leads to less distortion and superior frequency response conex damper the damper guides the speaker cone and voice coil as it moves back and forth during use while typical dampers are made of cloth on many models pioneer uses conex this special material provides increased rigidity longer travel and improved moisture resistance mosfet fdc fused drain coupled technology pioneer s spl amps have a fdc design with this feature the current is interrupted and precisely controlled at each mosfet it principally prevents mosfet structural failure in case of a short circuit conical dome technology mosfet output devices mosfet power supplies offer significant advantages over traditional bipolar devices input power is applied with greater efficiency stability and switching speed the result is high-quality sound at peak power output with less distortion and noise the pioneer impptm cone woofers give smoother low to upper midrange reproduction and high rigidity through the use of highly crystallised polypropylene the integration in the cone of conical domes bass bullets results in lower distortion richer bass sounds and increased cone rigidity crystalline impptm cone mosfet output section a mosfet output section utilises a high-density circuit layout to reduce line impedance and maintain stability switching noise is eliminated resulting in enhanced high-frequency range performance and improved linear response this material with high young modulus and high propagation rate makes the cone more rigid and improves the transient response resulting in accurate sound double/triple damper pwm regulated mosfet power supply during the process of dc-to-dc step-up transforming the voltage at the secondary winding must be kept stable despite voltage fluctuations or loads fluctuations during windings pioneer s pwm pulse width modulation power supply design maintains stability between primary and secondary windings and uses a mosfet to switch the power supply on and off very quickly in response to input this translates into cleaner output with less distortion a damper supports the speaker cone and guides the cone as it moves back and forth during use by using two dampers instead of one in many of its speakers pioneer has greatly improved linearity over the entire frequency range of the speaker dual ceramic-coated voice coil the ceramic coating superbly insulates the voice coil wire preventing short circuits due to overheating and drastically improving reliability meaning double power handling capacity of a conventional voice coil screw-type terminals pioneer uses screw-type terminals for the speaker connections as well as the power and ground connections these terminals make a more reliable connection and allow the use of larger gauge wire for improved performance adhesive layer ceramic thermal insulation electrical insulation copper wire 102

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