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Deal.ai › DS18
DS18
DS18 FRP-3.5K/TI 1-Channel Amp Class D Full-Range Monoblock 3500 Watts RMS/1ohm Titanium

DS18 FRP-3.5K/TI 1-Channel Amp Class D Full-Range Monoblock 3500 Watts RMS/1ohm Titanium

Best price now

$399.95at AmazonChecked 2 h ago

Compared across 13 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission. As an Amazon Associate, Deal.ai earns from qualifying purchases.

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Price facts

  • Lowest price today: $399.95 at Amazon (checked Nov 12, 2026).
  • Checked at 13 stores.

Our take on the DS18 FRP-3.5K/TI 1-Channel Amp Class D Full-Range Monoblock 3500 Watts RMS/1ohm Titanium

The DS18 FRP-3.5K is a Class D monoblock that plays full range, from 10Hz to 20KHz, rather than bass only. DS18 rates it at 3500 watts RMS at 1 ohm with 4000 watts max burst. That makes it unusual among monoblocks, which usually stop at subwoofer frequencies. It suits active builds running subs, mids and horns off one compact amp. Rivals at this power level are often larger and bass-limited; the FRP-3.5K trades that for a small chassis with dual fans and full protection circuitry.

Best forActive systems running subs, mids and horns from one ampSpace-limited custom installs needing high 1-ohm powerCompetition and SPL buildsOwners who want full-range output without a multi-channel amp
Pros
  • Full-range 10Hz–20KHz response, rare for a monoblock
  • High 1-ohm RMS rating in a compact chassis
  • Dual smart cooling fans
  • Thermal, overload, short circuit and voltage protection
  • Tiffany RCA terminals and click-step metal knobs
Cons
  • Power rating depends on a 1-ohm load, so it needs a stout electrical system
  • Full-range monoblock tuning is less common, so setup takes care
  • Compact Class D amps can run hot under heavy load despite the fans

DS18 FRP-3.5K/TI 1-Channel Amp Class D Full-Range Monoblock 3500 Watts RMS/1ohm Titanium prices at every store

  • FI PerformanceNew

    In stock

    $399.95Free shippingChecked 2 h ago
    Visit FI Performance
  • DS18New

    In stock

    $399.95Free shippingChecked 2 h ago
    Visit DS18
  • CrutchfieldNew

    In stock

    $399.95Free shippingChecked 2 h ago
    Visit Crutchfield
  • BigJeffOnlineNew

    In stock

    $399.95+ $19.90 shippingChecked 2 h ago
    Visit BigJeffOnline
  • SMS Car AudioNew

    In stock

    $399.95+ $34.90 shippingChecked 2 h ago
    Visit SMS Car Audio
  • AmazonRefurbished

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $267.95Free shippingChecked 2 h ago
    Visit Amazon
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $399.95Free shippingChecked 2 h ago
    Visit Amazon
  • Sky High Car AudioNew

    Availability unknown

    $399.95Checked 2 h ago
    Visit Sky High Car Audio
  • RobidouxNew

    Availability unknown

    $399.95Checked 2 h ago
    Visit Robidoux
  • SonicElectronix.comNew

    Availability unknown

    $399.95Checked 2 h ago
    Visit SonicElectronix.com
  • QuadratecNew

    Availability unknown

    $419.95Checked 2 h ago
    Visit Quadratec
  • WalmartNew

    Availability unknownSold by Sweetheart Deals

    $419.95Checked 2 h ago
    Visit Walmart
  • AutoZoneNew

    Availability unknown

    $419.99Checked 2 h ago
    Visit AutoZone
  • eBayNew

    Availability unknownSold by lifeafterbass

    $899.95Checked 2 h ago
    Visit eBay

Also available at

  • Complete Street PerformanceCheck price at Complete Street Performance

Store links may earn us a commission.

DS18 FRP-3.5K/TI 1-Channel Amp Class D Full-Range Monoblock 3500 Watts RMS/1ohm Titanium price history

Lowest price we've seen: $399.95 on Nov 13 at FI Performance. Tracked across 13 stores since Nov 13.

About the DS18 FRP-3.5K/TI 1-Channel Amp Class D Full-Range Monoblock 3500 Watts RMS/1ohm Titanium

The DS18 FRP-3.5K is a 1-channel, full-range Class D monoblock car amplifier in a Titanium finish. It produces up to 3500 watts RMS at 1 ohm, with 4000 watts max burst power. Its frequency response runs from 10Hz to 20KHz, so it can drive subwoofers, mids, horns, compression drivers or active systems.

It uses a high-efficiency micro digital design in a compact chassis. Construction includes a four-layer PCB, surface mount components, Tiffany-style RCA inputs and metal click-step control knobs. Two cooling fans and thermal, overload, short circuit and voltage protection are built in.

Variable crossovers and a bass boost allow tuning. LED indicators show power, protect and clip status.

Amplifier type
Full-range monoblock, 1-channel, Digital Class D
RMS power
1000 W at 4 ohm, 2000 W at 2 ohm, 3500 W at 1 ohm
Max burst power
4000 W at 1 ohm
Minimum impedance
1 ohm
Frequency response
10Hz - 20KHz
Signal-to-noise
83dB
Efficiency
80% at 4 ohm
Damping factor
90
THD
0.5%
Input impedance
10K ohm
Low-level input
400mV - 36V
Crossover
Selectable, filter range 40Hz - 20KHz
Bass boost
0dB - 12dB at 50Hz
Controls
Metal click-step knobs; remote level control with clip indicator
Indicators
LED power, protect and clip
Cooling
Dual smart cooling fans
Protection
Thermal, overload, short circuit, voltage input and clipping
Inputs
Tiffany RCA terminals
Power terminal
0-gauge
Recommended fuse
300A
Construction
Four-layer PCB, surface mount components
Color
Titanium
Dimensions
10.2" L x 5.5" W x 2.36" H (260 x 140 x 60 mm)
Heatsink length
9" (228 mm)
Weight
5.8 lbs (2.64 kg)
In the box
1 DS18 FRP-3.5K full-range monoblock amplifier

Questions and answers

What makes a full-range monoblock different?
Most monoblocks are bass-only. The FRP-3.5K plays 10Hz to 20KHz, so it can drive subwoofers, midrange drivers and horns in an active system.
How much power does it make?
DS18 rates it at 3500 watts RMS at 1 ohm and 4000 watts max burst. Plan on a 1-ohm load and an electrical system that can feed it.
Does it fit tight installs?
Yes. DS18 uses compact micro digital circuitry, so the chassis is small for its power class and fits space-limited builds.
What protection does it have?
It has dual smart cooling fans plus thermal, overload, short circuit and voltage protection, and clip indicators to watch levels.
What is in the box?
One FRP-3.5K full-range monoblock amplifier. Wiring and installation parts are not included.
Where is the DS18 FRP-3.5K/TI 1-Channel Amp Class D Full-Range Monoblock 3500 Watts RMS/1ohm Titanium cheapest?
At Amazon, for $399.95, as of our latest check.
Where can I buy the DS18 FRP-3.5K/TI 1-Channel Amp Class D Full-Range Monoblock 3500 Watts RMS/1ohm Titanium?
14 stores we checked sell it, including Amazon, FI Performance, DS18, Crutchfield, SMS Car Audio.

Stores we've priced the DS18 FRP-3.5K/TI 1-Channel Amp Class D Full-Range Monoblock 3500 Watts RMS/1ohm Titanium at

  • BigJeffOnline deals and prices
  • Crutchfield deals and prices
  • Sky High Car Audio deals and prices
  • SMS Car Audio deals and prices
  • SonicElectronix.com deals and prices
  • Walmart deals and prices
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