<![CDATA[Sound Off Audio, Inc.: New Products - 2001-2006 HD (Heavy Duty) 2500/3500 models]]> https://www.soundoffaudio.com Wed, 13 May 2026 15:13:50 +0000 <![CDATA[2001-2006 Chevy Gmc Crew Cab HD]]> https://www.soundoffaudio.com/2001-2006-chevy-gmc-crew-cab-hd/ Tue, 22 Nov 2016 11:18:37 +0000 https://www.soundoffaudio.com/2001-2006-chevy-gmc-crew-cab-hd/ 2001-2006 Chevy Gmc Crew Cab HD

OK here it is.... 2001-2006 Chevy or GMC HD crew cab speaker box for a massive L7 Kicker 12".

This box has roughly 1.1 cubic ft of airspace and provides enough excursion room so the woofer doesn't hit the floor.

We can build it for round subs as well. Single 12" in ..

Price: $279.00

]]> 2001-2006 Chevy Gmc Crew Cab HD

OK here it is.... 2001-2006 Chevy or GMC HD crew cab speaker box for a massive L7 Kicker 12".

This box has roughly 1.1 cubic ft of airspace and provides enough excursion room so the woofer doesn't hit the floor.

We can build it for round subs as well. Single 12" in ..

Price: $279.00

]]> OK here it is.... 2001-2006 Chevy or GMC HD crew cab speaker box for a massive L7 Kicker 12".

This box has roughly 1.1 cubic ft of airspace and provides enough excursion room so the woofer doesn't hit the floor.

We can build it for round subs as well. Single 12" in ..]]> <![CDATA[2001-2006 Chevy Gmc Crew Cab HD]]> https://www.soundoffaudio.com/2001-2006-chevy-gmc-crew-cab-hd/ Tue, 22 Nov 2016 11:18:37 +0000 https://www.soundoffaudio.com/2001-2006-chevy-gmc-crew-cab-hd/ 2001-2006 Chevy Gmc Crew Cab HD

OK here it is.... 2001-2006 Chevy or GMC HD crew cab speaker box for a massive L7 Kicker 12".

This box has roughly 1.1 cubic ft of airspace and provides enough excursion room so the woofer doesn't hit the floor.

We can build it for round subs as well. Single 12" in ..

Price: $279.00

]]> 2001-2006 Chevy Gmc Crew Cab HD

OK here it is.... 2001-2006 Chevy or GMC HD crew cab speaker box for a massive L7 Kicker 12".

This box has roughly 1.1 cubic ft of airspace and provides enough excursion room so the woofer doesn't hit the floor.

We can build it for round subs as well. Single 12" in ..

Price: $279.00

]]> OK here it is.... 2001-2006 Chevy or GMC HD crew cab speaker box for a massive L7 Kicker 12".

This box has roughly 1.1 cubic ft of airspace and provides enough excursion room so the woofer doesn't hit the floor.

We can build it for round subs as well. Single 12" in ..]]> <![CDATA[Single Sub Box 2001-2006 SILVERADO HD CREW CAB]]> https://www.soundoffaudio.com/single-sub-box-2001-2006-silverado-hd-crew-cab/ Fri, 05 Jul 2013 15:32:04 +0000 https://www.soundoffaudio.com/single-sub-box-2001-2006-silverado-hd-crew-cab/ Single Sub Box 2001-2006 SILVERADO HD CREW CAB

Fits 2001 to 2006 Chevrolet Silverado / GMC Sierra Crew Heavy Duty truck; 1500 HD, 2500 HD and 3500 HD

NOTE: Does not fit the Half-ton crew. We have another box available for the half ton crew cab truck.

FEATURES:

  • Fits one 8 inch or 10 inch subwoofer
  • Subwoofe..

    Price: $199.00

    ]]> Single Sub Box 2001-2006 SILVERADO HD CREW CAB

    Fits 2001 to 2006 Chevrolet Silverado / GMC Sierra Crew Heavy Duty truck; 1500 HD, 2500 HD and 3500 HD

    NOTE: Does not fit the Half-ton crew. We have another box available for the half ton crew cab truck.

    FEATURES:

    • Fits one 8 inch or 10 inch subwoofer
    • Subwoofe..

      Price: $199.00

      ]]> Fits 2001 to 2006 Chevrolet Silverado / GMC Sierra Crew Heavy Duty truck; 1500 HD, 2500 HD and 3500 HD

      NOTE: Does not fit the Half-ton crew. We have another box available for the half ton crew cab truck.

      FEATURES:

      • Fits one 8 inch or 10 inch subwoofer
      • Subwoofe..]]> <![CDATA[Single Sub Box 2001-2006 SILVERADO HD CREW CAB]]> https://www.soundoffaudio.com/single-sub-box-2001-2006-silverado-hd-crew-cab/ Fri, 05 Jul 2013 15:32:04 +0000 https://www.soundoffaudio.com/single-sub-box-2001-2006-silverado-hd-crew-cab/ Single Sub Box 2001-2006 SILVERADO HD CREW CAB

        Fits 2001 to 2006 Chevrolet Silverado / GMC Sierra Crew Heavy Duty truck; 1500 HD, 2500 HD and 3500 HD

        NOTE: Does not fit the Half-ton crew. We have another box available for the half ton crew cab truck.

        FEATURES:

        • Fits one 8 inch or 10 inch subwoofer
        • Subwoofe..

          Price: $199.00

          ]]> Single Sub Box 2001-2006 SILVERADO HD CREW CAB

          Fits 2001 to 2006 Chevrolet Silverado / GMC Sierra Crew Heavy Duty truck; 1500 HD, 2500 HD and 3500 HD

          NOTE: Does not fit the Half-ton crew. We have another box available for the half ton crew cab truck.

          FEATURES:

          • Fits one 8 inch or 10 inch subwoofer
          • Subwoofe..

            Price: $199.00

            ]]> Fits 2001 to 2006 Chevrolet Silverado / GMC Sierra Crew Heavy Duty truck; 1500 HD, 2500 HD and 3500 HD

            NOTE: Does not fit the Half-ton crew. We have another box available for the half ton crew cab truck.

            FEATURES:

            • Fits one 8 inch or 10 inch subwoofer
            • Subwoofe..]]> <![CDATA[Dual Sub Box (behind rear seat) 2001-2006 SILVERADO CREW HD]]> https://www.soundoffaudio.com/dual-sub-box-behind-rear-seat-2001-2006-silverado-crew-hd/ Fri, 05 Jul 2013 15:19:57 +0000 https://www.soundoffaudio.com/dual-sub-box-behind-rear-seat-2001-2006-silverado-crew-hd/ Dual Sub Box (behind rear seat) 2001-2006 SILVERADO CREW HD

              Fits 2001-2006 Chevrolet Silverado / GMC Sierra Crew Cab Heavy Duty 1500, 2500 AND 3500 Series Truck

              Note: ( FITS ONLY HD MODELS ) also fits 2007 classic body crew

              • Dual 8 10 or 12 PLEASE SPECIFY. 12s NEED TO BE AROUND 5.5 DEEP
              • Fits behind rear seat
              • Mou..

                Price: $279.00

                ]]> Dual Sub Box (behind rear seat) 2001-2006 SILVERADO CREW HD

                Fits 2001-2006 Chevrolet Silverado / GMC Sierra Crew Cab Heavy Duty 1500, 2500 AND 3500 Series Truck

                Note: ( FITS ONLY HD MODELS ) also fits 2007 classic body crew

                • Dual 8 10 or 12 PLEASE SPECIFY. 12s NEED TO BE AROUND 5.5 DEEP
                • Fits behind rear seat
                • Mou..

                  Price: $279.00

                  ]]> Fits 2001-2006 Chevrolet Silverado / GMC Sierra Crew Cab Heavy Duty 1500, 2500 AND 3500 Series Truck

                  Note: ( FITS ONLY HD MODELS ) also fits 2007 classic body crew

                  • Dual 8 10 or 12 PLEASE SPECIFY. 12s NEED TO BE AROUND 5.5 DEEP
                  • Fits behind rear seat
                  • Mou..]]> <![CDATA[Dual Sub Box (behind rear seat) 2001-2006 SILVERADO CREW HD]]> https://www.soundoffaudio.com/dual-sub-box-behind-rear-seat-2001-2006-silverado-crew-hd/ Fri, 05 Jul 2013 15:19:57 +0000 https://www.soundoffaudio.com/dual-sub-box-behind-rear-seat-2001-2006-silverado-crew-hd/ Dual Sub Box (behind rear seat) 2001-2006 SILVERADO CREW HD

                    Fits 2001-2006 Chevrolet Silverado / GMC Sierra Crew Cab Heavy Duty 1500, 2500 AND 3500 Series Truck

                    Note: ( FITS ONLY HD MODELS ) also fits 2007 classic body crew

                    • Dual 8 10 or 12 PLEASE SPECIFY. 12s NEED TO BE AROUND 5.5 DEEP
                    • Fits behind rear seat
                    • Mou..

                      Price: $279.00

                      ]]> Dual Sub Box (behind rear seat) 2001-2006 SILVERADO CREW HD

                      Fits 2001-2006 Chevrolet Silverado / GMC Sierra Crew Cab Heavy Duty 1500, 2500 AND 3500 Series Truck

                      Note: ( FITS ONLY HD MODELS ) also fits 2007 classic body crew

                      • Dual 8 10 or 12 PLEASE SPECIFY. 12s NEED TO BE AROUND 5.5 DEEP
                      • Fits behind rear seat
                      • Mou..

                        Price: $279.00

                        ]]> Fits 2001-2006 Chevrolet Silverado / GMC Sierra Crew Cab Heavy Duty 1500, 2500 AND 3500 Series Truck

                        Note: ( FITS ONLY HD MODELS ) also fits 2007 classic body crew

                        • Dual 8 10 or 12 PLEASE SPECIFY. 12s NEED TO BE AROUND 5.5 DEEP
                        • Fits behind rear seat
                        • Mou..]]> <![CDATA[Dual Sub Box (under rear seat) 2001-2006 Silverado CREW HD]]> https://www.soundoffaudio.com/dual-sub-box-under-rear-seat-2001-2006-silverado-crew-hd/ Thu, 04 Jul 2013 17:11:19 +0000 https://www.soundoffaudio.com/dual-sub-box-under-rear-seat-2001-2006-silverado-crew-hd/ Dual Sub Box (under rear seat) 2001-2006 Silverado CREW HD

                          This box is designed to fit 2001-2006 Chevy Silverado Crew Cab HD Series and 2001-2006 GMC Sierra HD Series Crew Cab Trucks.


                          This will not fit the Silverado Ext Cab. ONLY FITS THE 2500 AND 3500 SERIES CREW CABS.

                          Will not fit 1500 SERIES ( 1/2 ton )crew cab. We have a behind ..

                          Price: $279.00

                          ]]>                           Dual Sub Box (under rear seat) 2001-2006 Silverado CREW HD

                          This box is designed to fit 2001-2006 Chevy Silverado Crew Cab HD Series and 2001-2006 GMC Sierra HD Series Crew Cab Trucks.


                          This will not fit the Silverado Ext Cab. ONLY FITS THE 2500 AND 3500 SERIES CREW CABS.

                          Will not fit 1500 SERIES ( 1/2 ton )crew cab. We have a behind ..

                          Price: $279.00

                          ]]>                           This box is designed to fit 2001-2006 Chevy Silverado Crew Cab HD Series and 2001-2006 GMC Sierra HD Series Crew Cab Trucks.


                          This will not fit the Silverado Ext Cab. ONLY FITS THE 2500 AND 3500 SERIES CREW CABS.

                          Will not fit 1500 SERIES ( 1/2 ton )crew cab. We have a behind ..]]> <![CDATA[Dual Sub Box (under rear seat) 2001-2006 Silverado CREW HD]]> https://www.soundoffaudio.com/dual-sub-box-under-rear-seat-2001-2006-silverado-crew-hd/ Thu, 04 Jul 2013 17:11:19 +0000 https://www.soundoffaudio.com/dual-sub-box-under-rear-seat-2001-2006-silverado-crew-hd/ Dual Sub Box (under rear seat) 2001-2006 Silverado CREW HD

                          This box is designed to fit 2001-2006 Chevy Silverado Crew Cab HD Series and 2001-2006 GMC Sierra HD Series Crew Cab Trucks.


                          This will not fit the Silverado Ext Cab. ONLY FITS THE 2500 AND 3500 SERIES CREW CABS.

                          Will not fit 1500 SERIES ( 1/2 ton )crew cab. We have a behind ..

                          Price: $279.00

                          ]]> Dual Sub Box (under rear seat) 2001-2006 Silverado CREW HD

                          This box is designed to fit 2001-2006 Chevy Silverado Crew Cab HD Series and 2001-2006 GMC Sierra HD Series Crew Cab Trucks.


                          This will not fit the Silverado Ext Cab. ONLY FITS THE 2500 AND 3500 SERIES CREW CABS.

                          Will not fit 1500 SERIES ( 1/2 ton )crew cab. We have a behind ..

                          Price: $279.00

                          ]]>                           This box is designed to fit 2001-2006 Chevy Silverado Crew Cab HD Series and 2001-2006 GMC Sierra HD Series Crew Cab Trucks.


                          This will not fit the Silverado Ext Cab. ONLY FITS THE 2500 AND 3500 SERIES CREW CABS.

                          Will not fit 1500 SERIES ( 1/2 ton )crew cab. We have a behind ..]]> <![CDATA[01-06 Silverado HD Crew /GMC Sierra HD Crew Dual Box - behind rear seat]]> https://www.soundoffaudio.com/01-06-silverado-hd-crew-gmc-sierra-hd-crew-dual-box-behind-rear-seat/ Thu, 27 Jun 2013 11:40:12 +0000 https://www.soundoffaudio.com/01-06-silverado-hd-crew-gmc-sierra-hd-crew-dual-box-behind-rear-seat/ 01-06 Silverado HD Crew /GMC Sierra HD Crew Dual Box - behind rear seat

                          2001-2006 Chevrolet Silverado Heavy Duty Crew cab truck

                          2001-2006 GM Sierra Heavy Duty Crew cab truck

                          Features:

                          • Fits behind the rear seat
                          • Fits dual 8, dual 10 or dual 12 inch subwoofers
                          • Speaker terminals included
                          • Charcoal carpet.
                          • OE..

                            Price: $279.00

                            ]]> 01-06 Silverado HD Crew /GMC Sierra HD Crew Dual Box - behind rear seat

                            2001-2006 Chevrolet Silverado Heavy Duty Crew cab truck

                            2001-2006 GM Sierra Heavy Duty Crew cab truck

                            Features:

                            • Fits behind the rear seat
                            • Fits dual 8, dual 10 or dual 12 inch subwoofers
                            • Speaker terminals included
                            • Charcoal carpet.
                            • OE..

                              Price: $279.00

                              ]]> 2001-2006 Chevrolet Silverado Heavy Duty Crew cab truck

                              2001-2006 GM Sierra Heavy Duty Crew cab truck

                              Features:

                              • Fits behind the rear seat
                              • Fits dual 8, dual 10 or dual 12 inch subwoofers
                              • Speaker terminals included
                              • Charcoal carpet.
                              • OE..]]> <![CDATA[01-06 Silverado HD Crew /GMC Sierra HD Crew Dual Box - behind rear seat]]> https://www.soundoffaudio.com/01-06-silverado-hd-crew-gmc-sierra-hd-crew-dual-box-behind-rear-seat/ Thu, 27 Jun 2013 11:40:12 +0000 https://www.soundoffaudio.com/01-06-silverado-hd-crew-gmc-sierra-hd-crew-dual-box-behind-rear-seat/ 01-06 Silverado HD Crew /GMC Sierra HD Crew Dual Box - behind rear seat

                                2001-2006 Chevrolet Silverado Heavy Duty Crew cab truck

                                2001-2006 GM Sierra Heavy Duty Crew cab truck

                                Features:

                                • Fits behind the rear seat
                                • Fits dual 8, dual 10 or dual 12 inch subwoofers
                                • Speaker terminals included
                                • Charcoal carpet.
                                • OE..

                                  Price: $279.00

                                  ]]> 01-06 Silverado HD Crew /GMC Sierra HD Crew Dual Box - behind rear seat

                                  2001-2006 Chevrolet Silverado Heavy Duty Crew cab truck

                                  2001-2006 GM Sierra Heavy Duty Crew cab truck

                                  Features:

                                  • Fits behind the rear seat
                                  • Fits dual 8, dual 10 or dual 12 inch subwoofers
                                  • Speaker terminals included
                                  • Charcoal carpet.
                                  • OE..

                                    Price: $279.00

                                    ]]> 2001-2006 Chevrolet Silverado Heavy Duty Crew cab truck

                                    2001-2006 GM Sierra Heavy Duty Crew cab truck

                                    Features:

                                    • Fits behind the rear seat
                                    • Fits dual 8, dual 10 or dual 12 inch subwoofers
                                    • Speaker terminals included
                                    • Charcoal carpet.
                                    • OE..]]>