[TH quattro｜THESIS series 4ch power amplifier that brings out the expressiveness of sound]

If you feel that the sound of your OEM audio is lacking, or if you feel that simply replacing the speakers still doesn’t quite get you the results you want, rethinking your amplifier can sometimes lead to a major improvement.

TH quattro is a 4-channel power amplifier in audison’s THESIS series. While built on digital technology, analog technology is also carefully applied to the parts that are involved in sound expression.

This amp not only helps bring out more sound information and power, but also makes it easier to take advantage of what your speakers are capable of—down to the subtle nuances of vocals, the initial attack of instruments, and the overall coherence of the soundstage. Even with music you already listen to every day, you can aim for changes where sounds you never noticed before become naturally audible.

At 4Ω stereo, it supports a normal output of 160W × 4ch, and at A-class operation it supports 55W × 4ch. In addition, with the detachable crossover module, it also supports high-pass, low-pass, and band-pass settings.

This is not an amplifier made only to produce louder sound. It’s a model you can fine-tune in detail according to the overall system combination and the intended direction of the sound.

Make the most of the amplifier with installation and tuning

Car audio doesn’t automatically get better in the same way just by adding an amplifier.

The final results vary depending on factors such as how it’s connected to the OEM head unit, the speaker configuration, whether you have a subwoofer, how power and wiring are handled, and the amplifier’s operating settings. Especially with an amplifier like the TH quattro, which offers a wide range of adjustment for output and crossover settings, it’s important how you combine it and how far you tune it.

At Logon, after confirming your vehicle model, your current system, the music you typically listen to, and your preferred volume level, we organize the required outputs and configuration together. Rather than recommending the amplifier by itself, we finish your system by also looking at the connection with your speakers and subwoofer—so you end up with a sensible, workable setup.

If you feel like “I want to get more immersed in the music” or “I installed expensive equipment, but the sound isn’t what I expected,” please consult us not only about choosing the product, but also about installation methods and tuning. If it were me, I’d first check your current sound, and then we’d decide together whether there’s a meaningful reason to add the TH quattro.

■ Main specifications / specs

【Basic Information】
Product name: TH quattro
Series: THESIS
Type: 4ch power amplifier
Manufacturer: Amp

【Output】
4Ω stereo: 160W × 4ch
4Ω stereo (A-class): 55W × 4ch
2Ω stereo: 260W × 4ch
4Ω bridge: 150W × 2ch + 540W × 1ch / 500W × 2ch
2Ω bridge: 250W × 2ch + 650W × 1ch / 640W × 2ch
1Ω bridge: 340W × 4ch

【Sound Quality / Performance】
S/N ratio: 104dBA
Frequency response: 5Hz–70kHz
Total harmonic distortion: 0.03%
Damping factor: 80
Supply voltage: 11–15V

【Crossover】
Type: 3Way
Crossover frequency: 18Hz–7.5kHz, 32 steps
Supported filters: high-pass / low-pass / band-pass
Crossover slope: 12dB / 24dB
Modules: 2 sets of detachable module kits
Standard modules: 8 pcs
Custom modules: 2 pcs

【Input / Output】
Input sensitivity: 0.3–4.8V
Output impedance (stereo): 1–4Ω
Output impedance (bridge): 2–4Ω

【Dimensions】
Width: 510mm
Depth: 259mm
Height: 67mm

【Options】
Digital remote controller: DRC (sold separately)

• Specifications have been organized based on information that could be confirmed. For your actual system configuration and installation method, we will guide you after confirming your vehicle and the details of your existing audio system.