8-Inch Subwoofer  (400-1348)        Connections        Faxback Doc. # 7943

The subwoofer has two sets of terminals.  If you want to connect each
channel of a stereo amplifier to a different subwoofer, use a jumper wire
to connect the positive (red) terminal of one set of terminals to the
remaining terminals to the amplifier.  Use these same connections for a
single subwoofer with a mono amplifier.

If you want to connect both channels of a stereo amplifier to the same
subwoofer, connect each channel to one of the sets of terminals.

    Connect the jumper wire between the positive (red) terminal on one
    side of the subwoofer and the negative (unmarked) terminal on the
    other side.

    Use these connections for a mono amplifier or for each channel of a
    stereo amplifier.

    Connections for a Stereo Amplifier and Two Subwoofers
    (Or Mono Amplifier and One Subwoofer)

CAUTION:  Be sure to observe proper polarity when making these
          connections.  Reversed polarity causes the two signals to cancel
          out each other, resulting in a muffled bass sound.

Model Number R.S SUB-WOOF 8"

Speaker information:  Tested on 3/5/90

                      V.C. D.C.R. (Re)= 2.75 Ohms

                      V.C. (Le) @ Khz= .348 mH.

                      Zmax= 12.0 Ohms @ fs= 40.24 Hz.

                      Zmin=3.37 Ohms @ fmin=177.4 Hz.

                      Sd= .0214 m2

                      Cone Height = 1.00 in.

Box Measurements:     Test box = 0.528 Cu ft.

                      Cone volume = 0.006 Cu ft.

                      ZmaxB= 11.8 Ohms @ fb= 80.79 Hz

                      ZminB= 3.47 Ohms @ FminB= 188.5 Hz

Dp:                   6.499 inches

F3:                   48.7 Hz

Thiele-Small Parameters

Total                 Q (Qts) = 0.48

Mechanical            Q (Qms) = 2.094

Electrical            Q (Qes) = 0.623

Efficiency            in 2pie. No %)=0.48%

SPL                   for 1 W ! 1 m= 89.0

BL                    = 4.9

VAS                   = 1.7 cu. ft., 47.8 (1.)

Mms                   = 21.3 grams.

Cas                   = 0.337 E-6 m5/N

Cms                   = 0.735 mm/N

R1:                   5.7 Ohms R1b:5.7 Ohms

F1 + 24.38 Hz F1b     = 62.60 Hz

F2 + 63.68 Hz F2b     = 101.5 Hz

LEAP Loudspeaker Enclosure Analysis Program

Date:                 03-07-90

(C) Copyright         1987-88

CNS Electronics       3.10
Version

Time:                 11:37:51

        [S]peaker         [C]abinet     [D]esign      [A]nalysis Mode
A MENU   Verticle LINE                                  [B]lock Modes

:Spacebar:  [E]dit  Entry  [M]ove Entry  [L]ist Lib    [Q]uick Cabinet
            [D]el.  Entry  [C]opy Entry  [S]earch Lib  [L]ibrary Manager
:menu b:    [^S]pk  [^C]ab [^D]sn [^R]ecalculate       [X] Exit Program

Quick Cabinet- << 2nd Order Approximation >> [L]ibrary Data [M]anual Data
                                             [S]ealed Sys.  [V]ented Sys.]

Manual Data Entry                            [G]raph Display
                                             [ESC] Return to Menu

Qts=                     0.480
FS=                     40.24 Hz
Vas=                     0.0478 cu M

Butterworth                Enhanced Q             Bessel

Vab = 1.1422 cu ft.        Vab = 0.4265 cu ft.    Vab = 2.5960 cu ft.
F(-3) = 63.7189 Hz         F(3) = 71.0314 Hz      F(-3) = 66.4376 Hz
Peak = 0.0000 dB           Peak = 1.2494 dB       Peak = 0.0000 dB

                     Select Operation

Leap Louderspaker Enclosure Analysis Program

Date:                03-07-90
(C) Copyright        1987-88

CNS Electronics
Version              3.10

Time:                11:41:14

[S]peaker     [C]abinet     [D]esign                [A]nalysis Mode

                                                    [B]lock Modes

A MENU
: Spacebar :
: menu b   :

[S]peaker     [C]abinet     [D]esign                [A]nalysis Mode
                                                    [B]lock Modes
[E]dit Entry  [M]ove Entry  [L]ist Lib              [Q]uick Cabinet
[D]el. Entry  [C]opy Entry  [S]earch Lib            [L]ibrary Manager
[^S]pk  [^C]ab  [^D]sn [^R]ecalculate               [X]Exit Program

Quick Cabinet - <<4th Order Approximation>> [L]ibrary Data  [M]anual Data
                                            [S]ealed Sys.   [V]ented Sys.

Manual Data Entry:                          [G]raph Display
                                            [ESC]Return to Menu

Qts              = 0.480

Fs               = 40.24 Hz

Vas              = 0.04878 cu M

Chebyshev/Butterworth    Enhanced Q/Butterworth    Damped Chebyshev/Bessel

Vab   =  2.0952 cu ft.   Vab   = 1.5100 cu ft      Vab   =  1.6365 cu ft.
Fb    = 34.4499 Hz       Fb    = 40.2371 Hz        Fb    = 31.8298 Hz
F(-3) = 30.8438 Hz       F(-3) = 36.7501 Hz        F(-3) = 37.0626 Hz
Peak  =  0.0352 dB       Peak  = 1.4662 dB         Peak  =  0.11843 dB

(ALL-11/21/94)