SHIVA VENTED BOX APPLICATIONS

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1 SHIVA VENTED CABINET APPLICATIONS Page 1 SHIVA VENTED BOX APPLICATIONS A technical paper related to the Shiva Subwoofer and the FP Series vent kits Shiva Vented Cabinet Applications Page 1

2 SHIVA VENTED CABINET APPLICATIONS Page 2 TABLE OF CONTENTS 1 GENERAL DRIVER DESCRIPTION GENERAL APPLICATION NOTES POWER AMPLIFIER SELECTION MOUNTING GENERAL ALIGNMENT NOTES ROOM GAIN CROSSOVER EFFECTS ALIGNMENT COMPARISONS DESIGNS L VENTED SHIVA BOX Cut Lists Drawings L VENTED SHIVA BOX Cut Lists Drawings L VENTED SHIVA BOX Cut Lists Drawings Shiva Vented Cabinet Applications Page 2

4 SHIVA VENTED CABINET APPLICATIONS Page 4 Now, a Newton (the N in Cms units) is in units of kg * m / s 2, or kilogram meter/second squared. So, multiply the mass of the cone by the force applied (gravity) by the mechanical deflection: mass * force * deflection = kg * 9.8 m/s 2 * 0.47 mm/n = kg * m / s 2 * 0.47 mm / (kg * m / s 2 ) Note that there's a kg * m / s 2 term in the numerator and the denominator. Cancel the units out, and you're left with mm. Thus when Shiva is mounted horizontally, one will end up with an Xmax of mm one way (in the direction of gravity), and 15.44mm in the opposite way. As a comparison, several other high-end 12 subwoofer drivers will exhibit up to 1mm of offset; considering these units typically start with 2+mm less Xmax than Shiva, the result is a considerable drop in usable swept volume. 2.3 General Alignment Notes Shiva was designed to be a very versatile subwoofer driver, allowing numerous different acceptable bass alignments, depending on the characteristics desired of the system. In describing these enclosures and tunings, the following will be calculated for each alignment so that the responses can be compared: Box volume. The net internal volume, without any stuffing. Stuffed boxes can be from 10% to 25% smaller, based upon bandwidth of the signal and the stuffing density. Fb, the resonant frequency of the system. This is the nominal tuning frequency of the enclosure. Anechoic F3, the half power point of the system, in full space, referenced to the peak output. Anechoic F8, the apparent half volume point of the system, in full space, referenced to the peak output. Anechoic >105 db SPL, the frequency above which the system is capable of greater than 105 db SPL in full space. In Room F3, the predicted half-power point of the system, referenced to the peak output, when corner loaded in a 50m 3 room (4m x 5.5m by 2.3m). In Room F8, the predicted apparent half volume point of the system, referenced to the peak output, when corner loaded in a 50m 3 room (4m x 5.5m by 2.3m). In Room > 105 db SPL, the frequency above which the system is capable of greater than 105 db SPL, when corner loaded in a 50m 3 room (4m x 5.5m by 2.3m). Note that the frequencies are referenced to the peak output of the system, not the nominal output. Thus, increasing any peak in the output frequency response, e.g. increasing the Q of a sealed box, can result in a higher actual F3, not a lower F3. We choose to use this reference (peak versus nominal) because for higher Q systems, the nominal output is not achieved until several hundred Hertz (>200 Hz). We believe this is not applicable to subwoofers. As such, the F3 should be referenced to the highest value below 100 Hz. When placed in a room, effective bass output increases considerably due to room loading. Thus 105 db SPL is selected as a reference level representing a very loud signal. This is also the typical maximum SPL level required by several home theater specifications (notably THX). Shiva Vented Cabinet Applications Page 4

5 SHIVA VENTED CABINET APPLICATIONS Page Room Gain The room has a tremendous effect on the low-frequency performance of any loudspeaker system. This effect is generically referred to as room gain, although it is actually composed of two parts: boundary gain and pressure-vessel gain. Boundary gain arises from the driver operating not in free space but in a constrained space. That is, the driver is typically referred to as operating in 4π space free air, but ½π space in-room. Each boundary cuts the total space in half. Thus the floor boundary cuts the space to 2π, the side wall cuts the space to π, and the rear wall finishes reducing the space to ½π (also referred to as eighth space). Pressure vessel gain comes from the fact that, below a certain frequency, the room no longer supports standing waves; that is, the room is too small to contain a full wavelength. Contrary to legend, this does NOT mean the room cannot reproduce such waves! Rather, it means that the room is completely and uniformly pressurized by the input signal (we can t call it a wave, since it s not a full wave). This results in a gain in acoustic pressures in the room that grows as the frequency decreases (more gain for lower frequencies). Note that this effect is the primary reason one can get tremendous bass levels within a car; the gain starts at a very high frequency, thanks to the small size of the pressure vessel (car interior). We model and use both of these effects when determining the typical in-room performance of a system. Our models are based upon application of accepted physical principles, as well as confirmation with empirical measurements in several different rooms. The curve we use for estimating room gain is: As you can see, such a room and placement within the room can provide 10 db of gain at 20 Hz. In addition, the total gain starts well above the typical crossover point (above 300 Hz). Shiva Vented Cabinet Applications Page 5

6 SHIVA VENTED CABINET APPLICATIONS Page Crossover Effects The crossover plays a major effect in the total bandwidth of the system as well. In fact, the crossover not only limits the overall high-end bandwidth extension, but can also significantly impact the peak output of the system (for crossovers with a Q less than or equal to 0.707). We choose to use a standard LFE crossover for modeling. This crossover is nominally a second order lowpass design, with a corner frequency of 80 Hz, and a Q of (second order Butterworth at 80 Hz). The effective response of such a filter is: As you can see, the response of the crossover is never above 0 db; in fact, above 20 Hz, the crossover is actually reducing the output of the nominal system. It is because of this effect that one needs to consider the crossover when designing a subwoofer system. Shiva Vented Cabinet Applications Page 6

7 SHIVA VENTED CABINET APPLICATIONS Page 7 3 Alignment Comparisons Because of the mid-value EBP (~55), Shiva is a natural driver for use in vented boxes. Additionally, the lower Vas, as compared to other 12 subwoofers on the market, allows use of less-intrusive box sizes. Vented alignments offer many advantages when compared to sealed enclosures, including lower cone motion around tuning, reduced distortion around tuning, increased power handling around tuning, extended bandwidth, and other effects. However, there is one significant drawback to vented systems; namely, driver unloading below tuning. At frequencies lower than roughly 1/3 rd octave below the tuning frequency (Fb), the box completely unloads the driver. The vent is operating 180 out of phase with the driver. The net effect is that bass response rapidly drops, and so does power handling. Driver excursion greatly increases below Fb. For this reason, many suggest using a high pass or rumble filter with a vented design. Using the DUMAX T/S parameters for Shiva as given in section 1.3, the following vented boxes are recommended: Parameter Adire Alignment SBB4 EBS Box Volume 85 liters 95 liters liters Fb 20 Hz 22.2 Hz 18.1 Hz Vent Dimensions FP-3: 8 3/8 center FP-4: 12 center FP-4: 12 center Anechoic F Hz 23.0 Hz 17.8 Hz Anechoic F Hz 18.3 Hz 14.5 Hz Anechoic >105 db SPL 17.8 Hz 18.8 Hz 16.3 Hz In Room F Hz 21.8 Hz 16.3 Hz In Room F Hz 17.3 Hz 13.7 Hz In Room >105 db SPL 14.5 Hz 15.4 Hz 13.7 Hz NOTE: The vent dimensions list the recommended flared port vent kit and the length of the center tube, to reach the desired tuning frequency. To use a straight pipe, add 5 length to the listed center length. The Adire Alignment provides very good bass extension in a small box. The F8 in both cases is well below 20 Hz, while SPL crosses 105 db at 17.8 Hz anechoic, and 14.5 Hz in-room. This alignment promises very good bass extension and very good SPL capability, in a 3 cubic foot net box. The SBB4 is the standard SBB4 alignment. It attempts to maximize flat response, down to the lowest frequency possible. As such, it has the fastest fall-off rate of all three systems. This is seen by the ratio of F3/F8 for anechoic or in-room responses. The SBB4 does offer flatter response, while still providing F8s below 20 Hz, and more than 105 db SPL out over the standard audible (20 Hz and up) range. The EBS alignment is the deep-bass champion, thanks to its largest box. All other things being equal, a larger box will yield more efficiency (SPL out for power in), more bass extension, or some of both. In this case, we chose to maximize bass extension with the 18.1 Hz tuning. The result is a system with F8s in the low teens anechoic or in-room. Additionally, maximum SPL output is very high, with more than 105 db SPL on tap from 13.7 Hz and up, in-room. If the box size (5 cubic feet, net) is acceptable, the EBS alignment should be seriously considered. Shiva Vented Cabinet Applications Page 7

9 SHIVA VENTED CABINET APPLICATIONS Page 9 4 Designs Following are cabinet designs for the three shown alignments. For all designs, we use the following assembly layout: 1. Front and back panels are completely outset 2. Top and bottom are inset with respect to the front and back, and outset with respect to the sides 3. Sides are completely inset All cabinets assume the use of ¾ thick stock. Use of different thickness stock will require a change in the external dimensions of the cabinet. Note that the internal dimensions are the critical values; changes in stock thickness must be accounted for in the final external dimensions. Input cup/terminal locations are not shown. It is left to the final end-user to determine the best location for these components, as your final physical installation will be the guiding rule here. All cabinets are designed assuming no polyfill is used. Polyfill can result in the cabinet appearing larger than it really is; however, the additional polyfill may decrease the effective Q of the system, resulting in a final alignment different from that shown here. As such, use polyfill with caution when building PR systems. Measurement systems are highly recommended for experimenting with polyfill. All three cabinets are downfiring driver and vent. This is because the Shiva driver actually has more linear excursion when downfiring. Thus this orientation will actually result in the maximum linear output for the system, at any SPL level. Shiva Vented Cabinet Applications Page 9

10 SHIVA VENTED CABINET APPLICATIONS Page L Vented Shiva Box The 85 liter Vented Shiva box is the Adire Alignment. The vent is our FP-3 flared vent kit, with a center tube length of 8 3/8, for a final tuning of 20 Hz. This alignment yields a good compromise between bandwidth and midbass punch, which makes it ideal for combined home theater/audio reproduction needs Cut Lists Panel cuts QTY SIZE USE 2 19 x 20 Front and back panels 2 19 x 17.5 Top and bottom panels x 17.5 Side panels, midbrace x 9.5 Rear brace Hole/baffle cuts QTY SIZE USE 1 11 diameter Driver mounting; cut in bottom panel diameter Flared vent kit opening; cut in bottom panel x 6.25 Driver clearance; cut in midbrace x 6.25 Driver clearance; cut in rear brace 6 4 diameter Internal air flow; four in midbrace, two in rear brace Shiva Vented Cabinet Applications Page 10

11 SHIVA VENTED CABINET APPLICATIONS Page Drawings Copyright (C) Adire Audio. All Rights Reserved. Commercial use or reproduction of this design without the express written consent of Adire Audio is strictly prohibited, and punishable by law. SCALE DRAWN BY DCW 1 of 4 Box is 19" wide, 19" deep, and 20" tall, with driver and vent mounted on bottom Legs are 2.5" diameter hardwood stock, 3.5" long All cabinet walls and braces are constructed from 3/4" thick MDF Two internal braces are used: one from side-to-side, and the other from rear-to-midbrace All braces are drilled through with 4" ID holes Vent is the FP-3 3" vent kit, with center tube cut to 8 3/8" length SHEET A CONSTRUCTION NOTES LEGEND: TITLE Black solid lines are viewable edges Grey lines are normally hidden from view 85LVented Shiva Design Red lines are for dimensions Blue lines are for construction/reference Green lines are text/labels SIZE CAGE CODE DWG NO REV FRONT VIEW 2.5 in 1 in 1 in 2.5 in 12 in 5.25 in 11 in 8.38 in 8.38 in in 17.5 in 4 in 4 in 18.5 in 9.75 in 4 in 20 in 4.75 in 9.5 in 4.75 in 19 in Shiva Vented Cabinet Applications Page 11

12 SHIVA VENTED CABINET APPLICATIONS Page 12 SCALE DRAWN BY DCW 2 of 4 Box is 19" wide, 19" deep, and 20" tall, with driver and vent mounted on bottom Legs are 2.5" diameter hardwood stock, 3.5" long All cabinet walls and braces are constructed from 3/4" thick MDF Two internal braces are used: one from side-to-side, and the other from rear-to-midbrace All braces are drilled through with 4" ID holes Vent is the FP-3 3" ID vent kit, with center tube cut to 8 3/8" length Copyright (C) Adire Audio. All Rights Reserved. Commercial use or reproduction of this design without the express written consent of Adire Audio is strictly prohibited, and punishable by law. SHEET A CONSTRUCTION NOTES LEGEND: TITLE Black solid lines are viewable edges Grey lines are normally hidden from view 85L Vented Shiva Design Red lines are for dimensions Blue lines are for construction/reference Green lines are text/labels SIZE CAGE CODE DWG NO REV SIDE VIEW 2.5 in 1 in 1 in 2.5 in 12 in 5.25 in 11 in 5.25 in 4.25 in FRONT OF CABINET 17.5 in 18.5 in 9.75 in 4 in 20 in in 9.5 in 7.25 in in 4.75 in 19 in Shiva Vented Cabinet Applications Page 12

13 SHIVA VENTED CABINET APPLICATIONS Page 13 Box is 19" wide, 19" deep, and 20" tall, with driver and vent mounted on bottom Legs are 2.5" diameter hardwood stock, 3.5" long All cabinet walls and braces are constructed from 3/4" thick MDF Two internal braces are used: one from side-to-side, and the other from rear-to-midbrace All braces are drilled through with 4" ID holes Vent is the FP-3 3" ID vent kit, with center tube cut to 8 3/8" length Copyright (C) Adire Audio. All Rights Reserved. Commercial use or reproduction of this design without the express written consent of Adire Audio is strictly prohibited, and punishable by law. CONSTRUCTION NOTES LEGEND: Black solid lines are viewable edges Grey lines are normally hidden from view Red lines are dimensions Blue lines are for construction/reference Green lines are text/labels BOTTOM VIEW R1.25 in 8.38 in R1.25 in R2.63 in FRONT OF CABINET 7.25 in 4 in 4 in 5.25 in 4 in 9.5 in R5.5 in in R1.25 in 8.38 in R1.25 in 4 in 2.25 in 19 in 4.25 in 2.25 in SCALE DRAWN BY DCW 3 of 4 SHEET A SIZE CAGE CODE DWG NO REV 85L Vented Shiva Design TITLE 2.25 in 1.75 in 8.5 in 19 in 4.25 in 2.25 in Shiva Vented Cabinet Applications Page 13

14 SHIVA VENTED CABINET APPLICATIONS Page 14 Copyright (C) Adire Audio. All Rights Reserved. Commercial use or reproduction of this design without the express written consent of Adire Audio is strictly prohibited, and punishable by law. SCALE DRAWN BY DCW 4 of 4 Box is 19" wide, 19" deep, and 20" tall, with driver and vent mounted on bottom Legs are 2.5" diameter hardwood stock, 3.5" long All cabinet walls and braces are constructed from 3/4" thick MDF Two internal braces are used: one from side-to-side, and the other from rear-to-midbrace All braces are drilled through with 4" ID holes Vent is the FP-3 3" ID vent kit, with center tube cut to 8 3/8" length SHEET A CONSTRUCTION NOTES LEGEND: TITLE Black solid lines are viewable edges Grey lines are normally hidden from view 85L Vented Shiva Design Red lines are for dimensions Blue lines are for construction/reference Green lines are text/labels SIZE CAGE CODE DWG NO REV MID BRACE VIEW FROM FRONT REAR BRACE 9 in 9 in in 4.25 in 5.25 in 18.5 in in in 3.25 in 3.25 in 5.5 in 4 in 4 in 9.5 in 4 in 9.5 in 17.5 in Shiva Vented Cabinet Applications Page 14

15 SHIVA VENTED CABINET APPLICATIONS Page L Vented Shiva Box The 95 liter Vented Shiva box is the SBB4 alignment. The vent is our FP-4 flared vent kit, with a fulllength 12 center tube, for a final tuning of 22.2 Hz. This alignment provides extra in-room midbass punch, which is well suited for home theater applications Cut Lists Panel cuts QTY SIZE USE 2 20 x 20 Front and back panels 2 20 x 18.5 Top and bottom panels x 18.5 Side panels, midbrace x Front and rear brace Hole/baffle cuts QTY SIZE USE 1 11 diameter Driver mounting; cut in bottom panel diameter Flared vent kit opening; but in bottom panel 8 4 diameter Internal air flow; four in midbrace, two each in front and rear brace 1 11 x 6.25 Driver clearance cutout in midbrace x Driver clearance cutout in front brace x Driver clearance cutout in rear brace Shiva Vented Cabinet Applications Page 15

16 SHIVA VENTED CABINET APPLICATIONS Page Drawings SCALE DRAWN BY DCW 1 of 4 Box is 20" wide, 20" deep, and 20" tall, with driver mounted on bottom Legs are 2.5" diameter hardwood stock, 3.5" long All cabinet walls and braces are constructed from 3/4" thick MDF Three internal braces are used: one midbrace from side to side, one rear brace from midbrace to back, and one front brace from midbrace to front All braces are drilled through with 4" diameter holes Vent is the FP-4 vent kit, with full-length center tube Copyright (C) Adire Audio. All Rights Reserved. Commercial use or reproduction of this design without the express written consent of Adire Audio is strictly prohibited, and punishable by law. SHEET A LEGEND: TITLE Black solid lines are viewable edges Grey lines are normally hidden from view Red lines are for dimensions Blue lines are for construction/reference Green lines are text/labels CAGE CODE DWG NO SIZE REV CONSTRUCTION NOTES 95LVented Shiva Design 13 in 3.5 in FRONT VIEW 3.5 in 2.5 in 1 in 11 in 1 in 2.5 in 8.88 in 8.88 in 6.75 in in 9.5 in 18.5 in 20 in 18.5 in in 6.75 in 3.75 in 5 in 10 in 5 in 20 in Shiva Vented Cabinet Applications Page 16

17 FRONT OF CABINET CONSTRUCTION NOTES Box is 20" wide, 20" deep, and 20" tall, with driver mounted on bottom Legs are 2.5" diameter hardwood stock, 3.5" long All cabinet walls and braces are constructed from 3/4" thick MDF Three internal braces are used: one midbrace from side to side, one rear brace from midbrace to back, and one front brace from midbrace to front All braces are drilled through with 4" diameter holes Vent is the FP-4 vent kit, with full-length center tube SIDE VIEW LEGEND: Black solid lines are viewable edges Grey lines are normally hidden from view Red lines are for dimensions Blue lines are for construction/reference Green lines are text/labels Copyright (C) Adire Audio. All Rights Reserved. Commercial use or reproduction of this design without the express written consent of Adire Audio is strictly prohibited, and punishable by law. TITLE SIZE CAGE CODE DWG NO REV A SCALE 95L Vented Shiva Design SHEET SHIVA VENTED CABINET APPLICATIONS Page 17 1 in DRAWN BY DCW 2 of in 2.5 in 3.5 in 2.5 in 1 in 10 in 2.63 in 6.63 in 2.25 in 18.5 in 4 in 20 in in 4 in 8.88 in 8.88 in 3.75 in 5 in 10.5 in 4.5 in 20 in Shiva Vented Cabinet Applications Page 17

18 FRONT OF CABINET CONSTRUCTION NOTES Box is 20" wide, 20" deep, and 20" tall, with driver mounted on bottom Legs are 2.5" diameter hardwood stock, 3.5" long All cabinet walls and braces are constructed from 3/4" thick MDF Three internal braces are used: one midbrace from side to side, one rear brace from midbrace to back, and one front brace from midbrace to front All braces are drilled through with 4" diameter holes Vent is the FP-4 vent kit, with full-length center tube BOTTOM VIEW LEGEND: Black solid lines are viewable edges Grey lines are normally hidden from view Blue lines are for construction/reference Green lines are text/labels Copyright (C) Adire Audio. All Rights Reserved. Commercial use or reproduction of this design without the express written consent of Adire Audio is strictly prohibited, and punishable by law. TITLE SIZE CAGE CODE DWG NO REV A SCALE 95L Vented Shiva Design SHEET SHIVA VENTED CABINET APPLICATIONS Page 18 DRAWN BY DCW 3 of R3.13 in 2.25 in 3 in R1.13 in 8.88 in 8.88 in R1.13 in 8.88 in 2.25 in 10 in 7.75 in 20 in R5.5 in 8.88 in R1.13 in 8.88 in in 8.88 in R1.13 in 4.75 in 2.25 in 2.25 in 3.75 in 6 in 5.75 in 2.25 in 20 in Shiva Vented Cabinet Applications Page 18

19 CONSTRUCTION NOTES Box is 20" wide, 20" deep, and 20" tall, with driver mounted on bottom Legs are 2.5" diameter hardwood stock, 3.5" long All cabinet walls and braces are constructed from 3/4" thick MDF Three internal braces are used: one midbrace from side to side, one rear brace from midbrace to back, and one front brace from midbrace to front All braces are drilled through with 4" diameter holes Vent is the FP-4 vent kit, with full-length center tube LEGEND: Black solid lines are viewable edges Grey lines are normally hidden from view Red lines are for dimensions Blue lines are for construction/reference Green lines are text/labels Copyright (C) Adire Audio. All Rights Reserved. Commercial use or reproduction of this design without the express written consent of Adire Audio is strictly prohibited, and punishable by law. TITLE SIZE CAGE CODE DWG NO REV A SCALE BRACE 95L Vented Shiva Design REAR BRACE SHEET SHIVA VENTED CABINET APPLICATIONS Page in in 3 in 4.25 in 6.75 in in 4.25 in 10 in 18.5 in 18.5 in DRAWN BY DCW 4 of MID BRACE FRONT 6.75 in 3 in 2.63 in 6.63 in 2.25 in in 6.75 in 3 in 8.88 in 5.13 in 3.75 in 8.88 in 4.25 in 4.63 in Shiva Vented Cabinet Applications Page 19

20 SHIVA VENTED CABINET APPLICATIONS Page L Vented Shiva Box The liter PR Shiva box is the EBS alignment. The vent is our FP-4 flared vent kit, with a full-length 12 center tube, for a final tuning of 18.1 Hz. This box, while physically the largest of the three designs shown in this paper, yields the lowest frequency extension, as well as the widest and flattest in-room response. If the size of the cabinet (5 cubic foot net) can be tolerated, the EBS will reward you with maximum SPL and bass extension. The EBS is the ideal subwoofer for organ and very demanding home theater applications Cut Lists Panel cuts QTY SIZE USE x 22.5 Front and back panels x 21 Top and bottom panels 4 21 x 21 Side panels, front-to-back braces 2 21 x 5.75 Side to front-to-back-brace braces x 8 Mid brace Hole/baffle cuts QTY SIZE USE 1 11 diameter Driver mounting; cut in bottom panel diameter Vent hole; cut in bottom panel 18 4 diameter Internal air flow; five in each front-to-back brace, three in each side brace, two in mid brace x 6.25 Driver clearance; one in each front-to-back brace Shiva Vented Cabinet Applications Page 20

21 SHIVA VENTED CABINET APPLICATIONS Page Drawings Copyright (C) Adire Audio. All Rights Reserved. Commercial use or reproduction of this design without the express written consent of Adire Audio is strictly prohibited, and punishable by law. SCALE DRAWN BY DCW 1 of 4 Box is 22.5" wide, 22.5" deep, and 22.5" tall, with driver mounted on bottom Legs are 2.5" diameter hardwood stock, 3.5" long All cabinet walls and braces are constructed from 3/4" thick MDF Five internal braces are used: two front-to-back, one between the front-to-back braces, and one from each side to a front-to-back brace All braces are drilled through with 4" diameter holes Vent is the FP-4 vent kit, with full-length center tube SHEET A CONSTRUCTION NOTES LEGEND: TITLE Black solid lines are viewable edges Grey lines are normally hidden from view 142.5L Vented Shiva Design Red lines are for dimensions Blue lines are for construction/reference Green lines are text/labels SIZE CAGE CODE DWG NO REV 1 in 15.5 in 11 in 2.5 in 3.5 in FRONT VIEW 3.5 in 1 in 2.5 in 5.75 in 8 in 5.75 in in 21 in 21 in 21 in 6.5 in 6 in 6 in 4 in 22.5 in 3.25 in 8 in 8 in 3.25 in 22.5 in Shiva Vented Cabinet Applications Page 21

22 SHIVA VENTED CABINET APPLICATIONS Page 22 SCALE DRAWN BY DCW 2 of 4 Box is 22.5" wide, 22.5" deep, and 22.5" tall, with driver mounted on bottom Legs are 2.5" diameter hardwood stock, 3.5" long All cabinet walls and braces are constructed from 3/4" thick MDF Five braces are used: two front-to-back, one between the front-to-back braces, and one from each side to a front-to-back brace All braces are drilled through with 4" diameter holes Vent is the FP-4 vent kit, with full-length center tube Copyright (C) Adire Audio. All Rights Reserved. Commercial use or reproduction of this design without the express written consent of Adire Audio is strictly prohibited, and punishable by law. SHEET A CONSTRUCTION NOTES LEGEND: TITLE Black solid lines are viewable edges Grey lines are normally hidden from view 142.5L Vented Shiva Design Red lines are for dimensions Blue lines are for construction/reference Green lines are text/labels SIZE CAGE CODE DWG NO REV 1 in 3.5 in SIDE VIEW 15.5 in 3.5 in 1 in 2.5 in 2.5 in 11 in 6.75 in 3 in 7.5 in 9.75 in FRONT OF CABINET in 6.5 in 6 in 21 in 22.5 in 6 in 4 in 5.5 in 11 in 6 in 22.5 in Shiva Vented Cabinet Applications Page 22

23 SHIVA VENTED CABINET APPLICATIONS Page 23 SCALE DRAWN BY DCW 3 of 4 Box is 22.5" wide, 22.5" deep, and 22.5" tall, with driver mounted on bottom Legs are 2.5" diameter hardwood stock, 3.5" long All cabinet walls and braces are constructed from 3/4" thick MDF Five braces are used: two front-to-back, one between the front-to-back braces, and one from each side to a front-to-back brace All braces are drilled through with 4" diameter holes Vent is the FP-4 vent kit, with full-length center tube Copyright (C) Adire Audio. All Rights Reserved. Commercial use or reproduction of this design without the express written consent of Adire Audio is strictly prohibited, and punishable by law. SHEET A CONSTRUCTION NOTES LEGEND: TITLE Black solid lines are viewable edges Grey lines are normally hidden from view 142.5L Vented Shiva Design Red lines are for dimensions Blue lines are for construction/reference Green lines are text/labels SIZE CAGE CODE DWG NO REV BOTTOM VIEW 2.25 in R1.25 in 5.75 in R1.25 in 9.75 in 10.5 in 10.5 in 7.5 in 3 in 9 in 9.75 in 10.5 in FRONT OF CABINET 21 in 8 in 22.5 in R3.13 in 10.5 in 7.5 in 3 in 9 in 9.75 in R5.5 in R1.25 in 10.5 in 5.75 in R1.25 in 2.25 in 2.25 in 2.25 in 10.5 in 5.25 in 2.25 in 22.5 in Shiva Vented Cabinet Applications Page 23

24 SHIVA VENTED CABINET APPLICATIONS Page 24 Copyright (C) Adire Audio. All Rights Reserved. Commercial use or reproduction of this design without the express written consent of Adire Audio is strictly prohibited, and punishable by law. SCALE DRAWN BY DCW 4 of 4 Box is 22.5" wide, 22.5" deep, and 22.5" tall, with driver mounted on bottom Legs are 2.5" diameter hardwood stock, 3.5" long All cabinet walls and braces are constructed from 3/4" thick MDF Five braces are used: two front-to-back, one between the front-to-back braces, and one from each side to a front-to-back brace All braces are drilled through with 4" diameter holes Vent is the FP-5 vent kit, with full-length center tube SHEET A CONSTRUCTION NOTES LEGEND: TITLE Black solid lines are viewable edges Grey lines are normally hidden from view 142.5L Vented Shiva Design Red lines are for dimensions Blue lines are for construction/reference Green lines are text/labels SIZE CAGE CODE DWG NO REV FRONT-TO-BACK BRACES SIDE TO FRONT- TO-BACK BRACES 5.75 in 5.75 in 7.5 in MIDBRACE 6 in 21 in 6 in 21 in 5.5 in 6 in 6 in in 6 in 3.25 in 3.25 in 3.25 in 4.75 in 11 in 5.25 in 21 in 2.5 in 3.25 in 4 in 4 in 5.75 in 8 in Shiva Vented Cabinet Applications Page 24

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