M-104 M-124 M-154 M-104D M-124D M-154D Autosound "M" Series Subwoofer Application & Enclosure Guide Please read through this manual to familiarize yourself with your new speakers. Should your PowerBass Autosound speaker components ever require service, you will need to have the original dated receipt.
Thank you and Congratulations Congratulations on your decision to purchase PowerBass “M” series woofers. You now own a woofer of uncompromising design and engineering philosophy from a factory that truly believes in the relentless pursuit of perfection. Incorporating the highest quality parts and state-of-the-art materials, these woofers display the ultimate balance between high fidelity, extreme performance and long-lasting reliability. At Powerbass USA, Inc.
POWERBASS AUTOSOUND "M" WOOFER FEATURES Proprietary 4-layer, Non-pressed Paper, DDC Finish Cone: The premium grade cones on these subwoofers are blend of papers and wood pulps, and coated in DDC to protect the cone and eliminate distortion. This results in an extremely stiff cone that is resistant to environmental elements while remaining exceptionally stable even under the stress of high sound pressure levels.
WIRING GUIDELINES It is highly recommended that you seek an authorized PowerBass dealer to properly setup, wire and install your woofers for maximum performance. There are multiple ways to wire your woofers depending on your amplifier and system configuration. The use of multiple voice coils offers you more versatility in system configuration. It is important to know the limits of your amplifier to optimize its performance.
SINGLE VOICE COIL WIRING STANDARD SERIES-PARALLEL Amplifier Single 4 ohm woofer PARALLEL Amplifier Parallel wiring of two single 4 ohm subs = 2 ohms Amplifier Series/ Parallel wiring of four single 4 ohm subs = 4 ohms PARALLEL Amplifier Parallel wiring of four single 4 ohm subs = 1 ohms
INSTALLATION EXPERIENCE Installation of PowerBass Autosound Subwoofers requires experience with a variety of mechanical procedures including enclosure construction. This manual only provides general installation and operation instructions. If you have any reservations about your installation skills, please contact your local Authorized PowerBass dealer for assistance.
• VENTED BOX: Also known as a ported or bass reflex enclosure, this type of box is almost as easy to construct as a sealed enclosure. This design however is more efficient and results in an increase of bass output at certain frequencies. Although vented enclosure has an output advantage at some frequencies, it also has a steeper roll off, which will only affect bass frequencies below port tuning. Air inside the port will move in phase with the subwoofer reinforcing frequencies above the F3 (-3dB point).
TIPS TO GET THE MOST OUT OF YOUR M SERIES WOOFER Your PowerBass Autosound subwoofer has been meticulous engineered and designed to handle high power musical reproduction. Despite their rugged construction, it is possible to damage your speaker if they are improperly used. In general, you will hear distortion as a so-called warning before any damage occurs. If you hear distortion in your system, immediately reduce the musical level to the point where the sound retains its clarity. 1.
BOX CONSTRUCTION (SEALED OR VENTED): The material used for enclosure walls should be solid, dense and free of voids or warps. Your enclosure should be made ¾” or 19mm material, Finland or Baltic birch type plywood is recommended where the enclosure will be transported frequently. Highdensity fiberboard - MDF (not chip board) can be used on permanently installed systems. Minimum of 1” (25mm) or double ¾” (1-1/2”) baffle is recommended on high-powered SPL applications.
PREPARING FOR INSTALLTION NOTE: The tools listed below may be required for basic installation. • An electric drill with bits • Saber, circular and jig saw • Phillips-head and standard screwdrivers • Wire strippers • Crimping tool and needle-nose pliers • Silicone sealant (for enclosures), closed cell weather-stripping (for the speakers) INSTALLATION PRECAUTIONS NOTE: Proceed only if you are a qualified installer otherwise; let your dealer do it.
PARAMETERS FOR POWERBASS M SERIES WOOFERS (Due to Constant Improvements, Specifications and Parameters are subject to change without notice.) M-104 M-104D M-124 M-124D M-154 M-154D VC Impedance (ohms) 4Ω 4Ω + 4Ω 4Ω 4Ω + 4Ω 4Ω 4Ω + 4Ω Test Impedance (ohms) 3.2 1.6 3.2 1.6 3.2 1.6 Fs (Hz) 34 32 29 29 22 20.5 SD (sqCM) 330.1 330.1 510.7 510.7 779.3 779.3 Vas (Ltr) 31.4 30.6 77.3 68.7 204.2 179.4 Cms (M/N) 203.1 175.1 212.2 161.2 236.8 188.9 Mms (g) 103.
RECOMMENDED ENCLOSURES Please note that these enclosure volume recommendations are for the internal airspace inside the enclosure and include the displacement of the subwoofer and ports. When choosing your enclosure type, please pay close attention to your specific woofer, failing to use the correct enclosure may result in lower power handling and poor sound quality. To calculate the internal airspace required, take the internal dimensions of the box.
M-104D Optimum Sealed Vol. Standard Metric Gross Vb Internal 0.75 cu.ft 21.24 Liters F3 (-3dB Cutoff) 45Hz 45Hz Poly-Fill Yes Yes Qtc .822 .822 Pe (Watts-Rms) 100-325 Watts 100-325 Watts Acceptable Volumes (.75-1.25 cu. ft) (21.24-35.4 Liters) Optimum Ported Vol. Standard Metric Gross Vb Internal 1.25 cu.ft 35.4 Liters Circular Port 3” x 8.4” D 7.62cm x 21.
M-124D Optimum Sealed Vol. Standard Metric Gross Vb Internal 1.75 cu.ft 49.55 Liters F3 (-3dB Cutoff) 38Hz 38Hz Poly-Fill Yes Yes Qtc .943 .943 Pe (Watts-Rms) 100-375 Watts 100-375 Watts Acceptable Volumes (1.25-6.5 cu. ft) (35.4-184.06 Liters) Optimum Ported Vol. Standard Metric Gross Vb Internal 2.25 cu.ft 63.71 Liters Circular Port 4” x 9.3” D 10.16cm x 23.
M-154D Optimum Sealed Vol. Standard Metric Gross Vb Internal 4.55 cu.ft 127.43 Liters F3 (-3dB Cutoff) 30Hz 30Hz Poly-Fill Yes Yes Qtc .931 .931 Pe (Watts-Rms) 150-425 Watts 150-425 Watts Acceptable Volumes (3.55-19 cu. ft) (99.11-538.02 Liters) Optimum Ported Vol. Standard Metric Gross Vb Internal 6.0 cu.ft 169.9 Liters Circular Port 5” x 2.75” D 12.7cm x 6.
WE WANT YOU LISTENING FOR A LIFETIME Dear Customer, Selecting fine audio equipment such as the speakers you’ve just purchased is only the start of your musical enjoyment. Now it’s time to consider how you can maximize the fun and excitement your equipment offers. PowerBass and the Consumer Electronics Association (CEA) want you to get the most out of your equipment by playing at a safe level.
POWERBASS AUTOSOUND LIMITED WARRANTY POLICY PowerBass USA, Inc. offers limited warranty on PowerBass products under normal use on the following terms: PowerBass Autosound Speakers are to be free of defects in material and workmanship for a period of one (1) year. This warranty applies only to PowerBass products sold to consumers by Authorized PowerBass Dealers in the United States of America.
PowerBass Autosound – A division of PowerBass USA, Inc. 13936 Mountain Avenue – Chino, CA 91710 Tel. (909) 993-5399 – Fax (909) 993-5393 www.powerbassusa.
