Power output:
When operating at a typical voltage of 33V, the STK437 delivers a channel output power of 10W (TDH=0.2%). It possesses a certain power output capability and can satisfy audio playback scenarios that do not require particularly high power.
Sound quality characteristics:
►
Low distortion: The total harmonic distortion (THD) is relatively low, with a distortion level of only 0.2% under the aforementioned typical conditions. This means that it can accurately reproduce audio signals, producing relatively pure sound with less noticeable distortion. It is an important indicator for users who pursue high-fidelity sound quality.
►
Good sound reproduction: It can amplify audio signals with relative accuracy, exhibiting a balanced frequency response. It can relatively fully present the various frequency components of the audio signal, making the played sound closer to the original audio signal in terms of tone and pitch, providing a more realistic auditory experience.
►
High audio transparency and detail level: Due to the OTL circuit not using a protection circuit, the signal transmission path is simpler, providing a purer audio signal. This makes the STK437 typically have high audio transparency and detail level, allowing for clearer presentation of subtle changes in music.
►
Excellent low-frequency control and dynamic response: The key objective of OTL circuit design is to minimize the output impedance to match the impedance of the loudspeaker. This ensures better transmission of audio signals to the loudspeaker. The STK437 offers superior low-frequency control and dynamic response, making bass sound fuller and more powerful, and handling large dynamic range music with ease.
►
Improved immersion: The STK437 typically delivers a more immersive stage effect, bringing the audio signal closer to the loudspeaker position, as if the music were emanating directly from the loudspeaker, rather than from behind it, providing a more immersive experience for the listener.
Parameter
Power Supply Voltage: AC Single 23V-33V. Recommended 30-60W Transformer
Frequency response: 15Hz-45KHz
Input sensitivity: 300mV
Input impedance: 220K
Magnification: 4Ω 32 times, 8Ω 33 times
Measured power: 4Ω 18W x 2, 8Ω 12.5W x 2
Overall dimensions: 105L*63W*62H mm
Net weight of product: 150g
DIY is very simple and requires no debugging. DIY, upgrading, and modifying speakers are all good choices.
