SUNDOWN - SHALLOW DEPTH PACKAGE (1750W) (PLEASE READ DESCRIPTION FOR DETAILS)
THE INITIAL PRICE IS OF THE AMPLIFIER ONLY. ONCE YOU SELECT SUB SIZE IT CALCULATES PRICE ACCORDINGLY
SUNDOWN SHALLOW DEPTH PACKAGE (1500W)
This package contains
1x Sundown SIA-1750D (Dimensions 17x9x3)
2x Sundown Audio Sd4 D4 ohm subs (select 10” or 12”)
FREE - CCA 0g AMP INSTALL KIT (upgrade to ofc if you’d prefer that) also free T-shirt, volt meter, lanyard and sticker on top of free shipping inside the Cont US.
|T/S SPECS||SD-4 10″ D4|
|Sens (dB @ 1w/1m)||82.77|
|Sealed Enclosure||0.5-0.75 cu ft|
|Ported Enclosure||Not Recommended|
|Recommended Port Area||N/A|
|Displacement||0.09 cu ft|
|T/S SPECS||SD-4 12″ D4|
|Sens (dB @ 1w/1m)||83.97|
|Sealed Enclosure||0.8-1.0 cu ft|
|Ported Enclosure||Not Recommended|
|Recommended Port Area||N/A|
|Displacement||0.1 cu ft|
The SD-4 series is our premier sealed box offering & is the successor to the SD-3. We started off this design knowing that the majority of sealed box applications today face a depth restriction so each SD-4 model was designed to have the lowest depth possible while still maintaining a large window of mechanical cushion (about 2” p-p maximum mechanical travel for all models). We do not consider the SD-4 an “ultra-shallow” but they are as shallow as possible and feature several techniques to reduce the effective depth required.
As mentioned above; the SD-4 series effectively requires less depth than other woofers that are more physically shallow. First of all they lack a pole vent, thus, require no room for air venting behind the motor. This allows the motor to be completely flush against the back wall of the enclosure. To allow for efficient air-cooling we added vent channels on the OD of the pole and side-firing gap venting. Secondly the entire SD-4 series features an all-new foam “W” shape surround – this reduces the space required in front of the woofer gasket to about 1” total. So, despite not being an “ultra-shallow” woofer they have an effective total depth requirement of about 2” less than most traditional woofers of an equal depth. The fourth generation series also upgrades to NEO motors to reduce angled depth requirements substantially versus the SD-3 series!
The SD-4 series truly is a world-class sound quality woofer with low mounting depth, small box requirements, and a reasonable price. This line features an under-hung motor topology – this means that the voice coil is shorter than the top plate so the amount of winding in the gap doesn’t change at all over the center portion of stroke – in this case featuring a 1” thick top plate and ½” long 8-layer copper voice coil. This allows for 14.5mm linear excursion one-way while maintaining an extremely flat BL curve. The all new “W” surround design and newly tooled spider work together to create a flat “center” compliance curve which quickly turns progressively stiffer past the linear limits of the motor. This was heavily optimized in 3D computer simulations. This makes the SD-4 significantly more mechanically rugged than the previous generation. To top off distortion reduction features the SD-4 features a shorting ring around the bottom of the pole-piece to even out the LE curve.
We borrowed some technology from our large high-excursion woofers and incorporated a hyper-extended pole-piece into the SD-4 line. This helps to prevent voice coil rocking & related damages at higher levels of stroke, especially past linearity of the motor. Thanks to our extensive experience in building high-stroke subwoofers we were able to ruggedize a shallow platform as well.
The parameter set has been optimized for very small sealed enclosures for this line. As opposed to the outgoing SD-3 series the 4th generation will tolerate a ported box when necessary.
• Xmax = 14.5mm one-way by 70% BL
• RMS Power = 600-watts (400-watts for the 8” model)
• Under-Hung low distortion motor topology
• Solid pole piece with chamfered edges
• Black Aluminum 2.5” voice coil former for superior heat dissipation (2” for 8” model)
• High Temperature 8-Layer copper voice coil wire
• Large aluminum faraday ring (Pole Base OD)
• Spring Loaded Terminals
• Stitched-On Tinsel Lead Wires
• Optimized for small sealed enclosures
• Computer Optimized Foam “W” Surround
• High strength cast aluminum frames (8” model features US Patent D691595)
Your new Down4Sound product is covered by 1 limited warranty if purchased from Down4Sound or an authorized Down4Sound dealer. This warranty does not cover improper installation, accidental damage, misuse, abuse, improper wiring, operation of unit outside of listed specifications, or any product that has been modified or repaired by anyone other than Down4Sound. Your warranty covers defects in materials and/or workmanship ONLY and is not an insurance policy. The warranty only covers the original owner of the amplifier.
All warranty returns must be accompanied by the original sales invoice or receipt. You must contact us to request an RMA number prior to sending any returns via the RMA request form on our website. You are responsible for the cost of shipping your product back to us for warranty examination. If your product is covered under warranty, shipping back to you will be at no charge to you – if your product is replaced/repaired outside of warranty you must pay for return shipping and repair bill prior returning of the product or if no defect is found you are required to pay for return shipping only.
At the sole discretion of Down4Sound your product will be either repaired or replaced when it is being covered under warranty. In the event of shipping damage due to improper packaging on products being returned to Down4Sound the customer is liable for the cost of all damages, necessary repairs, or replacement. Be sure to properly pack your return!
* Extended additional warranty purchased on amplifiers take in affect from the date of purchase and must also be stated on orginal sales invoice or receipt.
Refund/Return Policy: https://www.down4soundshop.com/shipping-returns/
Down4Sound - Hours of Operation
|Monday||6am - 9pm PDT|
|Tuesday||6am - 9pm PDT|
|Wednesday||6am - 9pm PDT|
|Thursday||6am - 9pm PDT|
|Friday||6am - 9pm PDT|
|Saturday||8am - 4pm PDT|
D4S has some the best audio equipment you can by JP stand behind what he sale I will be a D4S life time coustmer
I bought the package for my GMC to do an install under my rear seat without compromising space. These subs pound!! I have a sundown 18 in my SUV so I knew the shallow subs would preform well. Down4sound was very helpful in fulfilling my order even got a call from Mr. Price himself! Thanks
Awesome product and great service from JP.
I sent Jason an email about what system would work best for my truck he sent me a link I prefer them shipping was quick I haven’t hooked them up yet but I will only order from Down4sound