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DAYTON AUDIO DATS LA Speaker Testing System
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Dayton Audio DATS LA Speaker Testing System
The Dayton Audio DATS LA (Digital Audio Test System Loudspeaker Analyzer) revolutionises loudspeaker measurement with its accuracy and price. This compact, computer-controlled system features a powerful 100W AC/DC amplifier for quick and easy testing of small and large signal parameters. Its patented symmetry test method uses multiple DC sweeps to analyse non-linearity and asymmetry, capabilities previously limited to expensive test systems. With precise dc bias control and proprietary data processing, DATS LA provides valuable information about loudspeaker performance, making it an essential tool for loudspeaker designers, engineers and audio professionals.
Dayton Audio DATS LA: Test based on direct current
Traditional impedance-based test methods provide valuable information about the small-signal characteristics of a loudspeaker, but fail to capture how parameters change with diaphragm displacement. The DATS LA introduces a unique approach to this problem with its patented DC-based measurement technique, allowing accurate assessment of a loudspeaker's non-linear electromechanical behaviour as a function of excursion.
By using precisely controlled DC pulses to move the voice coil and cone before performing impedance sweeps, DATS LA systematically captures the impact of excursion on key parameters. The result is highly accurate Bl(x) and Kms(x) curves, which illustrate the symmetry of the system and suspension over the entire operating range of the loudspeaker. By identifying non-linearities, mechanical limitations and asymmetry, engineers can optimise loudspeaker structures, suspension designs and excursion limits with unparalleled precision.
Dayton Audio DATS LA: 100W AC/DC amplifier
One of the main limitations of conventional loudspeaker analysis systems is their inability to perform high-power measurements. The DATS LA's 100-watt integrated amplifier overcomes this by allowing both small and large signal tests, enabling you to observe the evolution of T/S parameters under realistic operating conditions. By increasing the test signal voltage, you can assess how a driver's parameters change when it is driven outside its linear range, highlighting critical performance parameters such as :
- Reduced motor force due to flux modulation and coil offset.
- Effects of thermal compression and heating of the voice coil on resistance (Re) and sensitivity.
- Bl degradation at higher output levels, limiting peak SPL capability.
Dayton Audio DATS LA: Precision measurements
The DATS LA is a high-precision impedance measurement system that uses advanced algorithms to extract key Thiele/Small parameters (Fs, Qts, Vas, etc.) with extreme accuracy. In addition, it functions as a high-precision LCR meter, enabling accurate measurement of :
- Resistance (Re) : 0.002Ω - 10kΩ
- Inductance (L) : 0,05mH - 100mH (with DC resistance)
- Capacitance (C) : 0,002µF - 10 000µF (with ESR, dissipation factor and Q)
This level of precision is essential not only for evaluating loudspeaker components, but also for designing crossovers, passive networks and other precision circuits used in audio applications.
Dayton Audio DATS LA: Cutting-edge software
DATS LA is more than just a device - it's a complete software suite for loudspeaker analysis. The included software provides powerful measurement, visualisation and analysis tools, including :
- DC symmetry curves Bl(x) and Kms(x) to assess motor and suspension behaviour
- Oscilloscope mode with dual trace capability for signal analysis
- Signal generator with customisable waveforms, frequency and amplitude
- Measurement of Wright model parameters (Kr, Xr, Ki, Xi) to improve loudspeaker simulations
- USB connectivity for seamless integration into PC-based workflows
T/S parameters for small signals
Quickly determine the T/S parameters of a loudspeaker by connecting the test leads directly to the loudspeaker terminals and selecting ‘Measure Free-Air Parameters’. This displays the impedance amplitude and provides accurate measurements of Re, Fs, Qts, Qes, Qms and Le. To evaluate mechanical parameters such as Vas and Mms, add a mass to the cone or place the loudspeaker in a suitable test box and select ‘Measure V(as)’.
T/S parameters for large signals
DATS LA allows users to adjust the output level of the 100-watt amplifier during open-air parameter measurements. This provides precise control of the measurement process, allowing users to observe the variation of loudspeaker parameters in response to different output levels.
Bl vs. Excursion
The Bl symmetry curve gives an insight into the electromagnetic attributes of the loudspeaker through the travel of the diaphragm. It illustrates the effective force as the voice coil moves through magnetic space. The inverted result, represented by a dotted line, provides a clear and direct assessment of the symmetrical behaviour of the block as the voice coil moves inwards and outwards. This powerful visual tool is essential for understanding and optimising loudspeaker performance.
Kms vs. Excursion
The Kms symmetry curve is a tool for analysing the behaviour of a loudspeaker's mechanical suspension system. By examining the curve, you can understand the effective stiffness and restoring force at different positions throughout the cone's travel. The inclusion of an inverted result, represented by a dotted line, allows a direct assessment of the symmetry of the suspension as the diaphragm oscillates inwards and outwards.
Le vs. Excursion
The Le symmetry curve makes it easy to assess the change in inductance of a voice coil at different positions during the travel of a loudspeaker. By illustrating how inductance changes with respect to cone position, this metric allows the confident evaluation of components designed to reduce inductance, such as shorting rings, pole caps and specialised voice coil windings. This enables a clear understanding and effective analysis of inductance control methods.
Excursion par volt
The graph shown effectively illustrates the relative excursion as a function of input voltage, making it easy to see the onset of compression characterised by reduced driver force and stiffer suspension. In addition, the inverse relationship is clearly delineated with a dotted line, allowing the variance between inward and outward excursions to be distinguished.
Technical characteristics
| Specifications | |
|---|---|
| Product type | Speaker Testing System |
| Maximum output power | 1x 100W RMS @ 4Ω |
| Frequency response | 0.1Hz - 20kHz |
| Input | USB-B |
| Output | Connectors for banana plugs |
| General | |
|---|---|
| Supply voltage | 120-240V AC |
| Energy consumption | 100W |
| Dimensions | 45 x 144 x 274mm |
| Weight | 1.7kg |
| Color | Black |
| Package | 1x Dayton Audio DATS LA 1x USB-B cable 1x Power cable 1x Set of measuring cables 4x Angle brackets 8x Screws |
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