Soundstream TXP1.3500D is a car audio amplifier for an aftermarket vehicle audio installation. Match the specifications, connections and mounting requirements below to your system before ordering.

• Brand: Soundstream
• Manufacturer part number: TXP1.3500D

Key specifications

• Max Power: 3,500 Watts
• RMS Power 4Ω: 450W x 1
• RMS Power 2Ω: 800W x 1
• RMS Power 1Ω: 1,250W x 1
• SPECIFICATIONS: TXP1.3500D

Features and installation details

Tarantula Xtreme Power - Class D Monoblock Amplifier

Max Power	3,500 Watts
RMS Power 4Ω	450W x 1
RMS Power 2Ω	800W x 1
RMS Power 1Ω	1,250W x 1

  

Soundstream TXP1.3500D – 3500W Class D Monoblock Amplifier

To dominate your audio build and push serious bass power, you need more than just a big name—smart engineering, raw wattage, and extreme efficiency. The Soundstream TXP1.3500D is built exactly for that.

This 3500-watt monoblock amplifier was engineered to outperform conventional Class D amps as part of the Tarantula X Series. It delivers aggressive output without compromising efficiency or stability, making it ideal for high-performance car audio systems.

Unlike entry-level amps that strain your electrical system, the TXP1.3500D uses high-current silicon steel core transformers that supply consistent power on demand—meaning your subwoofers receive the clean, punchy, low-end response they were made for.

Tarantula X Series Power and Design

The TXP1.3500D amplifier features Soundstream’s most efficient Class D architecture, ensuring maximum performance with less heat and energy consumption. This allows compact dimensions without sacrificing output—a perfect match for tight install spaces or stealth builds.

With the Tarantula X name behind it, this amp doesn’t just look intimidating—it’s loaded with real, road-tested capability. It’s built to handle low-impedance subwoofer configurations, deliver constant power at 1 ohm, and maintain voltage under heavy bass loads.

Key Features and Specifications

• Series: Tarantula X
• Model: TXP1.3500D
• Amplifier Class: Class D
• Channels: Monoblock (1 channel)
• Maximum Power Output: 3500 watts
• Impedance Stability: 1 Ohm
• Transformer Type: Silicon Steel Core (High Current)
• Power Supply: High-efficiency MOSFET
• Low-Pass Filter: Variable
• Subsonic Filter: 10Hz – 50Hz
• Bass Boost: Remote gain control included
• Inputs: RCA line-level
• Protection Circuitry: Thermal, overload, and short circuit
• Cooling System: Aluminum alloy heatsink
• Design: Compact chassis, black anodized finish

Engineered for Serious Subwoofer Control

The TXP1.3500D is designed to deliver full-range, low-distortion power where it matters most—at the subwoofer level. Whether running a single high-powered driver or a multi-sub setup, this amplifier offers a clean, steady output to preserve clarity and depth at high volume levels.

It includes a subsonic filter to block ultra-low frequencies that can damage subwoofers and a variable low-pass crossover for fine-tuning your output. The included remote bass knob gives you instant control over your subwoofer gain without reaching behind panels or diving into your head unit.

Compact Footprint, Competition Power

Don’t let its small size fool you—the TXP1.3500D is built to compete. The silicon steel alloy power supply is far more efficient than traditional toroidal transformers, allowing it to push massive currents without requiring multiple batteries or oversized power cables. That means more output, fewer upgrades, and a cleaner installation.

This makes the TXP1.3500D ideal for custom builds, SPL competitions, and daily systems where space is limited but performance is non-negotiable.

Perfect For

• Car audio enthusiasts running powerful subwoofer setups
• Custom installers working with limited space
• SPL competitors looking for compact, efficient amps
• Drivers running 1-ohm or dual 2-ohm subwoofer loads
• Bass lovers need high output without high heat.

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SPECIFICATIONS	TXP1.3500D
Max Power	3,500 Watts
RMS Power @ 4Ω	450W x 1
RMS Power @ 2Ω	800W x 1
RMS Power @ 1Ω	1,250W x 1
Remote Gain Control	Included
Low Pass Filter	50-10KHz
High Pass Filter	15-1KHz
Bass Boost	0-12dB
Bass Boost Frequency	50Hz
Subsonic Filter	-
Frequency Response	20-20KHz
S/N	105dB
Input Sensitivity	200Mv-6V
THD	<0.3%
Operation Voltage	9V-16V DC
Fuse Rating	N/A
Dimensions (8.25"W x 2.75"H)	4.25" L

The TXP Line of amplifiers does not come with external fusing. Make sure you install an appropriate in-line fuse from the positive side of your power source.

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Tarantula XP Amplifier Owners Manual [PDF]

Tarantula XP Features:

1-ohm Minimum Impedance Monoblock Operation

LED Accent Lighting Illuminates Circuit Board, for Your Viewing Pleasure

Silicone Steel Alloy Core Power Supply Transformers, & Flux Capacitors

Military Grade SMT PCB Maintains Dynamic Performance

Direct Short, Thermal, & Overload Circuits Protect Amplifier

200mV-6V High Level or Low-Level RCA Input & Output

Variable 12dB High Pass, Low Pass, & Subsonic Crossovers

Dash Mount Gain Control Module Included

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