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

PP12-2
12" Dual PowerPipe Subwoofer

Tags:

The basic design behind the Power Pipe is to move large amounts of air through a relatively small hose, which resonates at a tuned frequency of about 35Hz. This is achieved through the design of the driver and surrounding sealed cabinet composition. Because the woofer has been tuned with its acoustical output in the region of frequencies where bass energy in music and movie soundtracks tend to be greatest, the driver can operate at the frequencies within its linear cone excursion range, and rely on the band pass flextube to simply “amplify” its output.

Features all aluminum drivers mounted inside a sealed enclosure. The front of each unit features a sealed band pass port, where the flextube attaches and from there connects to any number of available port options.

The PP12-2 can be powered by the optional James M1000 DSP amplifier, providing up to 1000W of power and full DSP control

Specifications

Frequency Response

20-120Hz +/-3dB

Nominal Impedance

4 ohms

Sensitivity

92dB 2.83V/1m

Recommended Power Range

250 - 1000W

Recommended Amplifier

M1000

Woofer

(1) 12" (304mm) Aluminum

Enclosure

MDF (Medium-Density Fibreboard)

Finishes

Studio Black

Width

14.875 in (377.82 mm)

Depth

15.12 in (384.05 mm)

Height

15.5 in (393.70 mm)

Product Documents

CAD drawings
- PP12-2 CAD Drawing (PDF)
- PP12-2 CAD Drawing (DWG)
Datasheets/Cutsheets
- PP12-2 Datasheet
Color Samples/Finishes
- PowerPipe Toe Kick Options

PP12-2 - Available downloads

Title: 1200PT-2 front

Size	Resolution	(Right-click: Save link as...)
51.65 KB	900x900	1200PT-2M.jpg

PP12-2 - Available downloads

Title: PowerPipe Hidden Under Staircase

Size	Resolution	(Right-click: Save link as...)
69.68 KB	600x900	Stairs_PP.jpg

PP12-2 - Available downloads

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

Size	Resolution	(Right-click: Save link as...)
425.72 KB	2400x1600	LR_IMG_1555-copy.jpg
425.72 KB	2400x1600	IMG_1555-copy.jpg

PP12-2 - Available downloads

Title: PowerPipe floor vent installation

Size	Resolution	(Right-click: Save link as...)
95.08 KB	900x900	PP_floor_vent.jpg

PP12-2 - Available downloads

Title: Toekick in marble

Size	Resolution	(Right-click: Save link as...)
134.21 KB	1191x900	powerpipe_in_marble.jpg

PP12-2 - Available downloads

Title: PowerPipe Disguised as Ventilation Grate

Size	Resolution	(Right-click: Save link as...)
196.77 KB	1121x900	PP_Hidden_Theater.jpg

PP12-2 - Available downloads

Title: PowerPipe under outdoor BBQ

Size	Resolution	(Right-click: Save link as...)
154.13 KB	480x480	PT_under_BBQ.jpg

PP12-2 - Available downloads

Title: PowerPipe Outdoors

Size	Resolution	(Right-click: Save link as...)
166.21 KB	1200x900	under_stair_deck_3.jpg
166.21 KB	1200x900	under_stair_deck_3.jpg

PP12-2 - Available downloads

Title: Powerpipe in a marine installation with custom wood grille

Size	Resolution	(Right-click: Save link as...)
82.76 KB	675x900	powerpipe-marine-1.jpg

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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.