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The Sledge STA-1200D replacement amp for the 13-Ultra subwoofers can only be controlled 

with the SVS Subwoofer Control mobile app. This app is available for free via the Apple® 

App® Store, Google Play™ Store and Amazon Appstore. 

11.

Place the Sledge STA-12000D replacement amplifier fully into the cabinet. Press down gently 

and evenly around the perimeter of the amplifier to ensure it is fully seated into the cabinet 

opening.

7.

 

Carefully insert and tighten the ten (10) included 

#2 square drive wood screws. Hand-snug the 

screws in a cross-torque pattern (i.e., top-to-bot-

tom, side-to-side, and opposite diagonal corners) 

to ensure uniform seating of the plate. 

Do not over-tighten screws – a firm hand-snug is 

sufficient. If you are using a power bit driver with 

a slip clutch, use the #4 clutch setting.

8.

 

Carefully reposition the subwoofer back to its original location, and reconnect the power 

cord and input cable.
Turn on the main power switch.

9.

10.

 

Disconnect the two female spade woofer connection wires from the Sledge STA-1000D 

amplifier plate. Then remove the Sledge STA-1000D amplifier completely and set aside.

4. 

Connect the female spades of the woofer wires to the male spades of the Sledge STA-1200D 

output adapter. Observe proper polarity (red positive, black negative). Make sure the female 

spade connections are tight and carefully crimp them as needed for a tight fit.

5. 

While supporting the Sledge STA-1200D replacement amplifier partially in the subwoofer 

cabinet, connect the white plastic section of the included output adapter to the Sledge 

STA-1200D output board. Note, this is a one-way connection with a locking tab.

6. 

Wires from woofer

Sledge STA-1200D output adapter

Just search “SVS App” and follow the prompts to 

download to your mobile device. Once installed, 

there’s a helpful tutorial that will guide you 

through each option and provide common 

settings to simplify the process.

  

HOME / VOLUME

MOVIE

PRESET

LOW PASS FILTER

OPTIONS

-22

 

100

50

20

40

200

0

6

4

2

0

-2

-4

-6

-8

-10

-12

PEQ1

ACTIVE

PEQ2

ACTIVE

PEQ3

DISABLED

BOOST:

 0 dB

Q FACTOR:

 1.2

FREQ:

 200 Hz

PARAMETRIC EQ

Download The App

For 

iOS, Android

and 

Amazon 

Devices

If you’re using an AV processor with auto-setup, re-run that process.  You may need a slightly 

different volume setting on the Sledge STA-1200D to achieve the same overall calibration 

level as you had with the Sledge STA-1000D.

For useful information about subwoofer placement, connections, DSP functions and more, an 

extended 

Owner’s  Manual  for  the  SVS  13-Ultra  Subwoofers  with  Sledge  STA-1200D  amplifier 

upgrade can be found here: 

www.svsound.com/sta1200d-upgrade-manual

12.

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