James Loudspeaker

Series
AT Series Satellites	SA Small Aperture®
BE Reference Series	SLT3 Soundbars
Cube Series	SPL2 Soundbars - NEW!
EMB II Subwoofers	SPL3 Soundbars
FXA/FXAQ Angled Baffle In-Wall/Ceiling	SPL5QT Soundbars
Mavericks Home Cinema	SPL6QT Quadratech/BEQ Soundbars
Omni Series	SPL8QT Quadratech/BEQ Soundbars
OT Outdoor Tower Series	ST Series Subterranean Subwoofers
OW Series - On Wall	VXQ
OW-M Marine Series - On-Wall (was Under Eave)	Wedge Series
PD Pendants	Custom Designs
PP Series - PowerPipe Subwoofers	Discontinued Products
QX In-Wall Series
QX In-Wall SoundBars
QXC/SXC Ceiling

Application
2-Channel/Hi-Fi
Bookshelf / In-Cabinet / Under furniture
Ceiling
In-Wall
Landscape
Marine
On-Wall
Theater
Marine Grade Wedge and On Wall Speakers

Type
Amplifiers
Angled Baffle
Centergy Technology
DSP
Grille - Rectangle
Grille - Round
Grille - Square
Subwoofers
UL1480/UL2073 Approved

PP8-M
8" Marine PowerPipe Subwoofer

Tags:

Inconspicuous by design, James’ PowerPipe Subwoofer offers a seamless fusion of visionary technology and revolutionary performance. James’ bandpass design produces a thunderous performance while delivering smooth frequency response and tight transitions. The PowerPipe provides a uniquely spacious soundscape, like nothing before.Infinite installation possibilities - The PowerPipe disappears both from visual and aural perspectives. PowerPipe installs easily into your attic, basement, closet, entertainment center or other available unused space. Fill your room or home theater extraordinary, powerful bass.PowerPipe subwoofers offer a number of optional port exits for integration into any environment. Displayed are the "ceiling exit" and the "90 degree toekick exit". Others are available (call us) and James can also custom fabricate a unique design as required. (1) 8” In-Wall Subwoofer Bandpass w/ 36" FlexPort with Architectural Port Mounting System.

Specifications

Frequency Response

28-120Hz +/-3dB

Nominal Impedance

8 ohms

Sensitivity

88dB 2.83V/1m

Recommended Power Range

150 - 500W

Woofer

(1) 8" (203mm) Aluminum

Enclosure

Aircraft Marine Grade Aluminum

Finishes

Black

Width

10 in (254.00 mm)

Depth

16.62 in (422.15 mm)

Height

11.62 in (295.15 mm)

Product Documents

CAD drawings
- PP8-M CAD Drawing (PDF)
- PP8-M CAD Drawing (DWG)
Datasheets/Cutsheets
- PP8-M Datasheet
Color Samples/Finishes
- PowerPipe Toe Kick Options

PP8-M - Available downloads

Title: PP8-M front

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PP8-M - Available downloads

Title: PowerPipe Hidden Under Staircase

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PP8-M - Available downloads

Title: GALLERY Architectural-Hidden-LR_IMG_1555-copy.jpg

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PP8-M - Available downloads

Title: PowerPipe floor vent installation

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PP8-M - Available downloads

Title: Toekick in marble

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PP8-M - Available downloads

Title: PowerPipe Disguised as Ventilation Grate

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PP8-M - Available downloads

Title: PowerPipe under outdoor BBQ

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PP8-M - Available downloads

Title: PowerPipe Outdoors

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166.21 KB	1200x900	under_stair_deck_3.jpg
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PP8-M - Available downloads

Title: Powerpipe in a marine installation with custom wood grille

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Lady Rebecca 68ft Yacht

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Category FAQs

Answer:

We get at least one question per week about making a powerpipe tube longer or shorter, and ask if it is possible, or what the ramifications would be. It is important to realize that a powerpipe subwoofer is a completely integrated design including the transducer, enclosure and the tube, or port – it is a sophisticated tuned system. With that in mind, let’s look at how the tube, or port length, affects the performance. Powerpipes are a bandpass system, meaning their frequency response has a bandpass shape with a low frequency cutoff and a high frequency cut off.

In the graph below, the red curve is a perfectly tuned powerpipe. The 1W sensitivity is about 89dB, the lower -3dB point is around 25Hz and the upper -3dB point is 90 Hz – perfect for a subwoofer.

The two additional curves show the affect of using a tube which is half the correct length and twice the correct length. The longer tube (black curve) tunes the system much lower so some efficiency is lost, the lower cutoff has moved down, but so has the upper, and shape has tilted. The shorter tube (blue curve) has the opposite effect, raising the lower cutoff and raising the upper cutoff, while also raising the efficiency. Again, the curve is tilted but in the opposite direction. One thing not shown in the simulation is how much port noise is created in each tuning and at what frequency – so guessing which has the least audible affect is difficult.

So even though the tube lengths have been drastically altered, with judicial use of EQ and additional amplifier power, these 2 modified tubes might still be acceptable in an installation, so if you have no choice but to shorten or lengthen a tube by 50%, it might still work for you. But we recommended about a ±6-inch change to the tubes provided, which is always less than a 50% change.

If you need to run a very long distance, we can modify the port diameter and possibly get you the performance you need – please call the engineering group for more information.