This review delves into the PD1890 2 Roman speaker, a powerful unit promising impressive performance. We examine its robust construction, featuring a sturdy frame, thick cones, and a substantial magnet, all suggesting high durability. However, the review highlights a crucial lack of precise power specifications, making a definitive assessment challenging. The declared 2500-watt rating is not substantiated by clear RMS or peak power figures, leaving room for ambiguity.To address this, we conducted rigorous testing using a custom-built high-power amplifier. While the test, performed without an enclosure, revealed a conservative estimate of approximately 300-watt RMS power handling, further testing within a properly designed enclosure is crucial for a complete evaluation. The review also explores the speaker's price point and considers its value proposition, ultimately emphasizing the need for more comprehensive analysis before reaching a final conclusion on its overall performance.
Pros And Cons
- Sturdy frame
- Thick leaves
- Coated inside and out (shiny)
- 5-inch voice coil
- Unspecified RMS or peak power despite a claimed 2500-watt power rating.
- Speaker's maximum capacity is unclear and requires further testing.
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Speaker Design and Build Quality
The PD1890 2 Roman speaker boasts a sturdy frame, visible in its robust construction. The speaker cones appear thick and well-made, suggesting durability. The description mentions a coating on both the inside and outside, giving it a shiny finish.
The magnet is quite substantial, though the exact dimensions were not specified in the review. Overall, the build quality seems impressive, promising resilience for various applications.
Specifications and Power Handling
The speaker is rated at 2500 watts of power, though the review acknowledges a lack of clear RMS or peak power specifications. This makes it difficult to ascertain its true power handling capacity.
The impedance is 8 ohms, and the voice coil diameter is 125mm (5 inches). The speaker is manufactured in China, according to the label.
The reviewer emphasizes the lack of a speaker enclosure during testing, making it difficult to assess the actual power and sound quality.
Testing Methodology and Results
The reviewer uses a custom-built SMPS-based Class H power amplifier, delivering approximately 60 volts, to test the speaker. This amplifier utilizes six Toshiba transistors in a BTL configuration.
The test was conducted without a speaker enclosure, pushing the limits to determine the speaker's capabilities by gradually increasing the power until distortion or damage was observed.
Peak voltage reached 52 volts AC during testing, with the power consumption peaking around 500 watts. Based on these observations, the reviewer estimates the RMS power handling capacity to be around 300 watts.
Conclusion and Overall Assessment
The PD1890 2 Roman speaker shows promise with its robust build and thick components. However, the lack of precise power handling specifications and the testing limitations due to the absence of an enclosure make it difficult to provide a definitive rating.
The speaker seems to handle around 300 watts of RMS power, a conservative estimate, indicating a decent power handling capacity for its size. The reviewer will create a custom enclosure and further tests are needed for conclusive judgments about its overall performance.
The online purchase price, approximately 1.4 million R00 (excluding shipping), suggests value for money but more comprehensive testing is required to confirm its suitability for various uses.