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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.
Autosound "M" Series Subwoofer
M-104
M-124
M-154
M-104D
M-124D
M-154D
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Summary of Contents for PowerBass Autosound M-104
- Page 1 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. M-104 M-104D...
- Page 2 170 dB. Please observe all local sound ordinances while listening to your PowerBass Autosound system. PowerBass USA, Inc. accepts no liability for hearing loss, bodily injury, or property damage due to the...
- Page 3 Rigid Tooled Basket (Powder coated Black Finish) with Voice Coil Perimeter Aero-Vents: This thick stamped steel basket is manufactured to the highest quality standards to ensure maximum excursion, ex- ceptional alignment of the subwoofer’s motor structure and moving parts while providing an extremely rigid non-resonant frame.
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Page 4: 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. - Page 5 SINGLE VOICE COIL WIRING SERIES-PARALLEL STANDARD 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...
- Page 6 INSTALLATION EXPERIENCE Installation of PowerBass Autosound Subwoofers requires experience with a variety of mechanical proce- dures including enclosure construction. This manual only provides general installation and operation in- structions. If you have any reservations about your installation skills, please contact your local Authorized PowerBass dealer for assistance.
- Page 7 Minor deviations from design recommendations however may result in frequency response and distortion problems. (If you are intending to use multiple subwoofers in your system, PowerBass recommends hav- ing separate chambers for each subwoofer if the subwoofers will be operated by two different amplified signals.
- Page 8 If you hear distortion in your system, immediately reduce the musical level to the point where the sound retains its clarity. All PowerBass Autosound subwoofers require an initial break-in period before it will reach optimum performance. Like any new precision machinery, allow a minimum of several days to one week with normal daily usage to ensure that the suspension has properly been broken-in.
- Page 9 SUBWOOFER CROSSOVER SETTING Your PowerBass subwoofers will perform best if they are used in conjuction with a subwoofer crossover of some kind. Using a crossover will remove unwanted high frequencies and allow them to concentrate only on bass.
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Page 10: Installation Precautions
• Use a utility knife to trim away fabric from the speaker mounting hole location before drilling. It is hard to get a good seal if you have both the carpet & subwoofer gasket between the speaker and the enclosure. - Page 11 PARAMETERS FOR POWERBASS M SERIES WOOFERS (Due to Constant Improvements, Specifications and Parameters are subject to change without notice.) M-104 VC Impedance 4Ω (ohms) Test Impedance (ohms) Fs (Hz) SD (sqCM) 330.1 Vas (Ltr) 31.4 Cms (M/N) 203.1 Mms (g) 103.4...
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Page 12: Recommended Enclosures
First multiple these number by themselves and then divide this sum by 1728. (W x H x D) / 1728. Please contact your authorized PowerBass Autsound dealer for other designs and specifications. (Even though these subwoofers can be used in a ported enclosure, PowerBass recommends a sealed enclosure for optimum performance and sound quality.) - Page 13 M-104D Optimum Sealed Vol. Gross Vb Internal F3 (-3dB Cutoff) Poly-Fill Pe (Watts-Rms) Acceptable Volumes Optimum Ported Vol. Gross Vb Internal Circular Port Fb (Box Tuning) F3 (-3dB Cutoff) Pe (Watts-Rms) Subsonic Filter Setting If Applicable M-124 Optimum Sealed Vol. Gross Vb Internal F3 (-3dB Cutoff) Poly-Fill...
- Page 14 M-124D Optimum Sealed Vol. Gross Vb Internal F3 (-3dB Cutoff) Poly-Fill Pe (Watts-Rms) Acceptable Volumes Optimum Ported Vol. Gross Vb Internal Circular Port Fb (Box Tuning) F3 (-3dB Cutoff) Pe (Watts-Rms) Subsonic Filter Setting If Applicable M-154 Optimum Sealed Vol. Gross Vb Internal F3 (-3dB Cutoff) Poly-Fill...
- Page 15 M-154D Optimum Sealed Vol. Gross Vb Internal F3 (-3dB Cutoff) Poly-Fill Pe (Watts-Rms) Acceptable Volumes Optimum Ported Vol. Gross Vb Internal Circular Port Fb (Box Tuning) F3 (-3dB Cutoff) Pe (Watts-Rms) Subsonic Filter Setting If Applicable MULTI E N C L O S U R E C O M P A T I B I L I T Y Standard Metric...
- Page 16 PowerBass and the CEA want you to listening for a lifetime! This manual is the exclusive property of PowerBass USA, Inc. Any reproduction of this manual, or use other than its intentions is strictly prohibited without the express consent of PowerBass USA, Inc. Copyright 2009 PowerBass USA, Inc.
- Page 17 Some states do not allow limitations on the length of an implied warranty, so this limitation may not apply. No person is authorized to assume for PowerBass any other liability in connection with the sale of this product.
- Page 18 PowerBass Autosound – A division of PowerBass USA, Inc. 13936 Mountain Avenue – Chino, CA 91710 Tel. (909) 993-5399 – Fax (909) 993-5393 www.powerbassusa.com...
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