Tru Technology

Every TRU unit is built by hand in Southern California, so one technician follows it from the raw board to the final test. The design utilizes discrete Class A input parts rather than the more affordable op-amp chips found in volume models, which reduces noise and preserves detail. Oversized power supplies and thick copper traces provide the amps with large current reserves and tight control over the speakers. Before boxing, each amplifier undergoes a full-band test sweep and a listening check; the matching data sheet is then printed and signed. This small-batch approach incurs a higher upfront cost, but it ensures the amp you receive has already been thoroughly tested on the bench and is ready for years of trouble-free play.

The entire pre-amp section is pure Class A, chosen for its linear response and very low distortion. Most output stages operate in high-bias Class AB, so the first several watts remain in Class A before transitioning into the cooler AB region as power increases. Select Billet v2 models remain in full Class A across their rated range; these draw more current and run warmer but give the sweetest midrange. The mixed strategy lets you pick the balance of efficiency, heat, and absolute fidelity that suits your installation. Either way, TRU shields all heat-critical parts with thick billet heatsinks, so reliability in the dash or trunk is never a concern.

No. TRU designs its power supplies and output devices for 2 Ω or 4 Ω stereo applications, ensuring that distortion, damping factor, and thermal stress remain within safe zones. Dropping to 1 Ω doubles the current demand, which risks tripping the protection circuit, overheating the transistors, and voiding the warranty. If you need more power, it is better to add a second amplifier or choose a higher-rated model in the line. Staying within the rated impedance also keeps noise lower and transient response faster.

They do not. A Line-Amp is a clean analog stage whose job is to raise signal voltage, lower noise, and buffer the source, allowing amplifier gains to remain low. A DSP, by contrast, lets you set crossovers, equalize bands, and adjust time alignment in the digital domain. Many builders run the two together—DSP for control and Line-Amp for voltage swing—because the pairing maximizes dynamic range while keeping floor noise well-buried. If you already use a DSP and want a quieter background and stronger output, adding a Line-Amp is a simple upgrade.

Domestic build means shorter supply chains, so part quality and origin are easy to verify, and counterfeit risk remains low. Tight local control also allows every unit to be tested under the same calibrated gear, which ensures published specs are accurate. Service is faster because the factory, parts bins, and tech staff are all located in the same building—eliminating the need for overseas shipping and long queues. Buying American-made products supports skilled jobs and helps ensure that niche, high-end audio stays alive. For many buyers, the combination of performance, transparency, and long-term support outweighs the slight price increase.