Thuật ngữ Audio Chuyên ngành
Đây là một số thuật ngữ, xin các bác ra tay giúp đỡ, em biết ơn các bác vô cùng.
1. vertical tangent arrays
2. tangent wavefronts
3. active DSP-driven front and rear-firing drivers, dipolar LF sections
4. long excursion neodymium 8” woofers
5. Patent-pending Hyperboloid Reflective Wavesources project tangent wavefronts
6. Configurable Directivity Flange sets horizontal dispersion to 90°
7. Components: HF: 1 x 3" voice coil, 1.4” throat neodymium 16
8. Shape 5° Trapezoid.
9. Construction Baltic birch ply finish with structured black coating for the main structure.
10. Metal box for the rear section with dark grey coating.
11. Peak SPL @ 1m [b] Configuration dependent [d].
12. Dispersion [c] Coupling plane: not usable alone. Configuration dependent [d]. Non-coupling plane: 90°.
13. Nominal Impedance
14. Recommended Amplifiers HF: 3000Watts into ~3/6 cabinets.
15. MF/LF (front section): 6000Watts bridged mono into ~6/6 cabinets. LF (rear section): 6000Watts bridged mono into ~6/6 cabinets.
16. Response curves and data: anechoic far field above 300Hz, half-space below 300Hz. [b] Sensitivity & peak SPL: will depend on spectral distribution.
Measured with band limited pink noise. Refers to the specified ±3dB range. Data are for speaker + processor + recommended amplifier combinations. [c] Directivity curves and data: 1/3 octave smoothed frequency response, normalized to on-axis response. Data obtained
by computer processing of offaxis response curves. [d]Please refer to the GEO T User Manual. Usable range data: frequency response capability with TD crossover slopes removed.
Tài liệu nguyên bản ở đây: http://kjc.vn/Nexo.pdf
Trả lời 15 năm trước
Một số thuật ngữ về loa:
Power handling (watts)
A larger figure denotes a higher power handing, but this figure has no bearing on the power of the amplifier necessary to drive the speaker. For example, a speaker which can handle 100 watts can be driven by a 20 watt amplifier. What has a bigger bearing on a speaker’s ability to be driven by a given amplifier, is its efficiency (measured in dB) and impedance (measured in ohms).
If you intend to play your hifi louder, a more powerful amplifier is usually required. This is because a lower powered amplifier will run out of current and start to distort at a lower volume, compared with a more powerful design. It is this distortion from lower-powered amplifiers that most commonly leads to damaged or "blown" speakers.
Recommended amp power (watts)
The suggested output range of an amplifier, with which the speaker is most compatible.
Sensitivity (dB)
Measured in dB (decibels). A measure of the speaker’s efficiency. The higher the figure, the easier the speaker is to drive and the less power is required from the amplifier to achieve the same output volume. Most hifi speakers are between 86 and 92dB. Figures much lower may require more powerful or tolerant amplifiers.
Nominal impedance (ohms)
A measure of resistance, rated in "ohms". Speakers have an average resistance which is most commonly about 8 ohms. As a general rule, amplifiers can cope happily with speakers rated at between 4 and 8 ohms. Some less common models have resistances outside of this range. Such speakers may require more tolerant amplifiers.
Magnetically shielded?
Useful if you’re going to place your speakers close to a traditional television or computer monitor. The magnetic radiation from speaker magnets can cause distortion to the picture if placed too close to your television (usually less than 40 cms). But if the driver’s magnets are shielded, this will not occur.
Plasma & LCD televisions and displays are NOT affected by magnetic radiation.
Frequency response (Hz)
The lowest and highest points in the frequency range between which a measured audio output can be delivered.
Crossover frequency (kHz)
The crossover is the electronic circuit inside a speaker which filters the signal to the different drivers. The crossover frequency is the point in the frequency range at which the signals are diverted to the different drivers. A two-way speaker (the most common design) will have a single crossover frequency, between the treble and bass and a three-way speaker will have two crossover frequencies, between the treble & the midrange and the midrange & bass.
Biwireable?
Biwireable speakers have separate connections for bass and treble signals. This enables upgraded biamplified systems to be used to run the speakers, which gives improvements in scale, dynamics and better control over the frequency range.
Biwireable speakers also benefit on normal integrated amplifiers. To biwire speakers with such amplifiers, four core cabling is required (many of the speaker cables on this site can be bought in two or four core configurations).
Biwireable speakers can also be wired in the normal manner using two core cable, however by using the four core cabling and biwireing you will achieve the best results from your speakers. This can be done with any amplifier - special connections are not required (see diagram below).
Image
The gains are a tighter more focused sound with greater clarity.
Bass port?
Also known as a "reflex port". A specially tuned hole in the speaker’s cabinet which is designed to maximize bass performance.
Drivers
HF (tweeter): The treble driver of a speaker, designed to produce high frequencies.
LF (woofer): The bass driver of a speaker, designed to produce low frequencies.
Most commonly, standard speakers feature a single tweeter and a single woofer. A subwoofer (a speaker designed purely for low bass) will typically feature a single woofer), however there are other configurations which a designer might use when building a loudspeaker.
Finish
The colour/material/finish in which the product is supplied.
(theo superfi.co.uk)