Tru Technology

Tru Technologies Tungsten Grande Class AB Monoblock Amplifier

Q: Can I use the 4-ohm version with a 2-ohm subwoofer?

No. These amplifiers are specifically optimized for their rated impedance (4 or 8 ohms). Running a load lower than the optimized value will cause the amp to overheat or enter protection mode.

Q: Why would I choose an 8-ohm monoblock?

The 8-ohm variant is perfect for high-impedance SQ subwoofers or professional-grade drivers often used in high-end automotive builds to maintain maximum damping factor and sound quality.

Q: Is this monoblock only for subwoofers?

No. This is a full-range Class AB design. It is excellent for driving a single high-power channel in a 3-way active front stage, such as a dedicated center channel or massive mid-bass drivers.

Q: What makes Class AB better than Class D for a subwoofer?

Class AB offers superior linearity and less phase shift compared to most Class D designs. This results in bass that is more "in time" with the music and provides better tonal accuracy.

Q: What is the footprint of this amplifier?

The Monoblock shares the same chassis as the TG 2-channel, measuring approximately 15.5" x 11.0" x 2.25", allowing for a matching, uniform aesthetic in multi-amp installations.

Q: Does it have an internal crossover?

Tru Technology amplifiers typically focus on signal purity. While most users will use a DSP for crossovers, this unit provides raw, uncolored power to ensure your processor does all the heavy lifting.

Q: What size fuse is required for this amp?

Given its 700W Class AB draw, we recommend an external 100A fuse and high-quality 4-gauge OFC power/ground cabling.

Q: Where is this amplifier manufactured?

Like all Tungsten Grande series amplifiers, the Monoblock is hand-built and individually tested at the Tru Technology facility in La Crescenta, California.

SKU: TG-RS 1.4

Impedance

$ 1,999.99

QUICK SPECS

Best For: Audiophile Subwoofers or High-Power Mid-bass
Power: 700W x 1 RMS (Optimized for 4Ω or 8Ω)
Topology/Class: Full-Range Class AB
Sonic Character: Tight, Articulate, Massive Headroom

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Audiocircle Hamburg Line 6.5″ 2-way component speakers

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Tru Technologies Tungsten Grande Class AB Monoblock Amplifier

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INSTALLER'S TAKE

This is the amp for the guy who says Class D sounds "thin." It’s rare to see a true Class AB monoblock of this size anymore. Because it shares the same footprint as the TG 2-channel, it makes for a perfectly symmetrical amp rack. When installing, you MUST respect the impedance optimization—if you bought the 4-ohm version, do not wire a pair of 4-ohm subs to 2-ohms. This amp is about quality, not chasing the lowest possible resistance. The reward for following the rules is the most articulate, controlled bass I've heard in a vehicle. It handles transients with zero lag and has enough mass to keep cool even when you're leaning on it.

Product Details

A Rare Breed: The Full-Range Class AB Monoblock

The Tru Technology Tungsten Grande Monoblock is a precision instrument designed for the absolute purist. While the industry has moved toward efficient Class D monoblocks, Tru Technology understands that for the ultimate SQ (Sound Quality) subwoofer or high-output mid-bass application, nothing replaces the tonal depth and "slam" of a high-bias Class AB circuit. Built into the same substantial CNC-machined chassis as the TG 2-channel, this monoblock is hand-crafted in La Crescenta, California, specifically for enthusiasts who demand zero compromise in signal integrity and cone control.

Application-Specific Engineering: 4-Ohm and 8-Ohm Variants

In a departure from "one size fits all" amplifiers, the Tungsten Grande Monoblock is offered in two distinct, optimized variants. One is precision-tuned to deliver its full 700W RMS into a 4-ohm load, while the other is specifically engineered for high-impedance 8-ohm drivers. This optimization ensures maximum thermal stability and efficiency for your specific driver selection. Because these units are tuned for a specific impedance, they are not designed to be run below their rated load, ensuring that the amplifier operates within its most linear and musical window at all times.

The Experience: Absolute Authority and Control

The sonic character of the TG Monoblock is defined by its "Grip." With a massive power supply and high damping factor, it provides a level of low-frequency articulation that makes subwoofers sound more musical and less "boomy." Being a full-range Class AB design, its versatility extends beyond subwoofers; it is an incredible choice for driving high-power mid-bass drivers in a multi-amp active configuration. From the hand-engraved badges to the single-sided connection layout, every inch of this amplifier reflects Audio Intensity's commitment to high-end, American-made audio excellence.

Specifications

Model	Tungsten Grande Monoblock
RMS Power	700W x 1 (14.4V)
Available Variants	4-Ohm Optimized OR 8-Ohm Optimized
Circuitry	Full-Range Class AB
Frequency Response	10Hz ~ 30kHz (±0.5dB)
S/N Ratio	> 100dB
Damping Factor	> 300
Input Sensitivity	300mV ~ 8.5V
Dimensions (L x W x H)	15.5" x 11.0" x 2.25"
Origin	Made in USA (California)

FAQs

Can I use the 4-ohm version with a 2-ohm subwoofer?

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Why would I choose an 8-ohm monoblock?

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Is this monoblock only for subwoofers?

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What makes Class AB better than Class D for a subwoofer?

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What is the footprint of this amplifier?

+

Does it have an internal crossover?

+

What size fuse is required for this amp?

+

Where is this amplifier manufactured?

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Tru Technologies Tungsten Grande Class AB Monoblock Amplifier

Tru Technologies Tungsten Grande Class AB Monoblock Amplifier

A Rare Breed: The Full-Range Class AB Monoblock

Application-Specific Engineering: 4-Ohm and 8-Ohm Variants