PYLE Audio Hydra PLMRDW104 User's Manual
Contents
1. FA o N o Z PYLE AQUA PRO SPECIFICATIONS PYLE aaua pro series Woofer for small enclosures Proma PLMRDW104 Physical 8 Installation Power Watts RMS 300W Voice PIE Power Watts Peak 600W Magnet 60 oz Nom Impedance 4 ohm Cone White P P Re ohms 3 6 Surround Santoprene Fs Hz 37 Spider Conex Qms 8 793 Dustcap White P P Qes 0 854 Frame Plastic Qts 0 771 Terminals Glass Fiber with X Max am 8 9 Vas cu ft 0 94 Pyle continually strives to improve the performance and value of its products lall specifications are subject to change amp a Sealed a Vented Le Suggested enclosure parameters peaker mode Small Large Small Large PLMRDW104 Enclosure volume cu ft Sealed or vented 0 6 NA 0 8 1 0 Vent length inches 8 8 Vent diameter inches 3 3 Enclosure Frequency Hz 59 Fb Tuning Frequency of the Vented Enclosure Hz 39 36 F3 Systems 3dB Down Piont Sealed Hz 43 PYLE AQUA PRO SERIES Woofer Specifications PYLE AQUA PRO SPECIFICATIONS PYLE aaua pro series Woofer for small enclosures Eon PLMRDW124 Physical amp Installation Power Watts RMS 500W Voice 2 TIL Power Watts Peak 1000W Magnet 80 oz Nom Impedance 4 ohm Cone White P P Re ohms 3 6 Surround Santoprene Fs Hz 30 Spider Conex Qms 7 406 Dustcap White P P Qes 0 699 Frame Plastic Qs 0 639 Terminals Gaa Pera bm sa o X Max nm 8 9 Topin Vas ufi 2 53 Pyle contin2. eased efficiency and lower distortion ENCLOSURES Can eliminate need for crossovers or electronics in signal path Bandpass enclosures can be constructed in many different configurations Often referred to as 4 th 5th 6th 7th or 8th order enclosures these enclosures are named based on the sum of their highpass and lowpass orders The common characteristics between all bandpass enclosures is that one can control both the low end response and the high end cutoff This capability allows the user tremendous flexibility when tailoring a sound system to a particular vehicle Another benefit of the bandpass enclosure can be increased efficiency Typical passband efficiency gains are in the 3db range but gains over twice that amount can be achieved in some configurations Lower distortion 1s also attainable because bandpass systems can integrate their own acoustic low pass filter making it possible to eliminate low end passive inductors or electronic crossovers from the signal path Yet another benefit in bandpass enclosures is ease of installation With a bandpass enclosure all of the sound is delivered through a vent s This can be a big help in dealing with space limitations by only requiring enough area to vent the enclosure into the vehicle not the entire woofer opening Critics of bandpass enclosures feel that because all of the sound is delivered through a vent sound quality may suffer when compared to other direct firing enclosures A co
3. f the enclosure free of obstructions for a distance equal to or greater than the port diameter Typically the larger the vent the less duct noise created from the air being moved in and out As the vent gets larger in diameter the same tuning frequency can only be maintained by extending the length of the duct The duct may extend beyond the outside of the enclosure or bend internally in order to achieve the desired length Ultimately the limitations of the size and length of the duct will be determined by the physical dimensions of the enclosure and installation area When installing vents in the enclosure try to leep the vent at least one vent diameter from any wall and 7 at least two vent diameters from the woofer There are pressure differences that exist surrounding the woofer and in proximity to the enclosure wall that can keep the vent from performing as designed e Because of lack of space in the enclosure reducing the size of the vent or allowing the duct to protrude A out of the enclosure are options that the occasional installation may require Another method to get a duct to fit in an enclosure would be to use PVC pipe for the duct and a PVC elbow to create a bend in the duct The length of the duct should be measured at its center to determine the length FIG 2 Example of a vented enclosure PYLE Woofer Manual BandPASS choose this type of enclosure for Control of both low end response and high end cutoff Incr
4. nsideration when contemplating using a bandpass enclosure is the complexity of the enclosure The box is more difficult to build and accessibility to the woofer for servicing is limited In a 4th order bandpass enclosure 12db slope for highpass and lowpass the woofer low frequency tuning is determined by the volume of the rear sealed enclosure The vent determines the frequency for the acoustic low pass filter while the volume of the front compartment determines the response curve in the passband The greater the volume of the front compartment the greater is the rise in the mid pestband Conversely the smaller the front compartment the greater is He dip By adding a series inductor to a 4th order bandpass enclosure it becomes a 5th order enclosure with a 18db lowpass rolloff A 6th order bandpass or dual vented bandpass enclosure will have a rear chamber vent This enclosure works similarly to a 4th order enclosure with the efficiency and low frequency control of a vented system added Similarly to other vented enclosures the enclosure provides little control for the woofer below the tuned frequency of the vent With both 6th order bandpass or vented enclosures a sub sonic or low frequency filter can aid in reducing inaudible and often excessive cone excursions thereby minimizing premature driver failure All rules applying to building sealed or vented enclosures apply to constructing bandpass enclosures The enclosures must be sealed vents m
5. ually strives to improve the performance and value of its products Jall specifications are subject to change Sealed er Vented ww Small Large Small Large Suggested enclosure parameters PLMRDW124 Enclosure volume cu ft Sealed or vented 1 0 NA 1 2 1 5 Vent length inches 8 8 Vent diameter inches 4 4 Enclosure Frequency Hz 56 Fb Tuning Frequency of the Vented Enclosure Hz 38 35 F3 Systems 34B Down Piont Sealed Hz 41 PYLE AQUA PRO SERIES Woofer Specifications VENTED ENCLOSURES choose this type of enclosure for Increased bass response Enhanced efficiency Tuneable enclosure Vented enclosures also known as bass reflex or ported enclosures utilize a tuned vent called at duct or port This vent capes the energy of the woofer s backwave to increase bass response and efficiency The tuning frequency of the enclosure can be altered by changing either the size or the length of the vent This means that the user can modify the bass output without changing the enclosure Because the port supplies a portion of the bass to the listener the port athe speaker must both vent into the vehicle s interior Here are some general guidelines for utilizing vents on your enclosure e Vents can be of any shape Use a material that is easy to work with when constructing the ducts Cardboard mailing tubes or PVC pipe work well as port tubes Remember to keep the port opening inside and outside o
6. ust be unobstructed and kept away from enclosure walls FIG 3 Example of a sealed bandpass enclosure FIG 4 Example of a vented bandpass enclosure PYLE Woofer Manual www pyleaudio com
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