Eminence PSD High Frequency 1″ Driver, 80 Watts at 8 Ohms. Developed for totally loaded Eminence cabinets, or as upgrades to an existing device. Eminence PSD 1 bolt on high frequency driver handles a powerful 80 watts AES at kHz. Eminence:: 1 Inch Bolt On:: Eminence PSD (Bolt-on) 1 inch Throat 80W Compression Driver 8 Ohm:: Eminence PSD (Bolt-on) 1 inch Throat 80W.

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Michael, Probably to keep spec sheets concise, although I don’t actually know. All the drivers tested are nominally rated as 16 ohm. High Frequency Compression Driver Evaluation. Jan 14, 1, 11 38 My own little world rtimmerm. The Jensen Hypex PA30 driver, lacking a phase plug, but having an acoustic high pass filter, had less upper harmonic distortion.

Examples of air non-linearity introduced by the mixing of two ultrasonic tones at dB SPL are available in posts of: Program consisted of both dual sine wave tones of the same musical interval at different frequencies, and a 30 second music excerpt. John Roberts Graduate Student May 18, It is important to dminence that the VC in BMS drivers is in the middle of the diaphragm, because it is a ring radiator design, not at the very outside as with a traditional compression driver.

The Jensen Hypex is an antique, no longer available except on the psd22002 market.


Michael Smithers Junior May 16, In the past two decades, LF driver technology has made large advances in linear excursion capability and power handling, resulting in more clean LF output per driver, although requiring more power to achieve that goal. Silas Pradetto Graduate Student May 17, Pd2002 of thought here, and more so as the thread expands. My thanks to Bennett Prescott, U. Having owned many of these drivers, have found unit to unit consistency to be quite poor, the eminenc tested was the best of four units I still own.

Jan 11, 0 Jan 29, 0 0. I once asked him about the non-linearity of eminende, since even though an FIR can cancel the distortion, distortion isn’t constant with output, so he’d need a dynamic FIR to properly take care of the psv2002 across the range of output levels the driver could handle.

This HF compression driver evaluation was undertaken for three basic reasons: But I do hear it even with AAC at the lower to mid bit rates.


The distortion eninence above do not include the minimal contributions of upper harmonics past the second, and are rounded to the nearest whole number above the actual 2ndHD. So in addition to masking, our ears tend not to notice increasing amounts of distortion at higher frequencies. More on this later, I have to go.

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Rather than select drivers by how good they sound, he selects drivers by how linear they are, since everything else can be fixed in DSP. Psd20002 to me, this is the main difference between the drivers, and why the does not go as low as the It appears to me that although LF transducer technology has made some definite improvements in the past decades, HF driver design constraints have limited improvements to voice coil and diaphragm survivability and lighter weight.

Having one sitting idle after use in a Leslie-style rotating speaker, it has sat idle for the last decade, and provided an interesting glimpse into past designs.

Jan 11, 10, 7 38 34 Wallingford, CT www. The structure they are mounted in is different, because the motors are different sizes, neo vs ceramic. Drivers with more efficient, extended HF output would require less compensating boost. Odd order harmonics tend to sound worse at least from a western musical standpoint and there are differences in their levels between the drivers.

Eminence Speaker Drivers

If you buy from the iTunes store, you’re stuck with k AAC which is adequate for a lot of stuff but not always. I could not resist quoting this Art. Want to make that abundantly clear at the top for all those that don’t know, or missed that part of your first post. The dual sine wave tests made hearing the differences between the drivers easiest, simply stated, the EV DH1A has more output available with less audible distortion than the other drivers. The BMS drivers are only capable of low distortion output with a Hz crossover frequency at a level lower than one watt.

This compression results in high throat SPL, at the upper power levels the drivers were tested at the non- linearity of air is responsible for a significant though undetermined percentage of the of distortion measured, that non- linear distortion is unavoidable in any compression driver design.

Anyone willing to crunch the numbers further is welcome to look at the RTA charts and derive finer resolution. Greg Cameron Senior May 17, Thread starter Art Welter Start date May 9, The musical recordings include the output of the high frequency horn only, a full range mix of the same files are available, recorded at the same and lower levels down to just under a watt: The narrow horn results in an on axis sensitivity around 6 dB more than most typical 90 degree horns, the 2 meter results would be similar to one meter results on some horns.


Each driver also used a specific delay compensation to align it with the LF track, slightly different delay and EQ were required for the Hz alignment. I designed a series of tests that involves elimination of as many variables described above to determine how a variety of drivers compare to each other at different drive levels, all driven with the same program material through the same electronics chain.

I don’t know about secrets but I thought DG had a strategy to cancel or somehow mitigate “throat” distortion in horns, this is only one type of loudspeaker distortion, thus the desire for linear drivers so the throat distortion will be predictable.

Finally, thanks to Bonnie T, love of my life who put up with my obsessions over the last month in particular, and the last four years in general. Nowadays I use lossless AAC when encoding my own stuff. This makes comparison of HF compression drivers between different manufacturers difficult in other than very fundamental respects.

And I am swamped with work at the moment, so will take a while to get to all the things I want to say here. Sorry for the run on mess, tabs and more than single spaces in a line vanish after editing.

I’d also be very interested to follow a thread on masking in relation to drivers. I don’t want to say they use the same diaphragms, as that has bit me in the butt before, but they have the same VC, and to my knowledge the membrane is the same.

Eminence PSDDIA Diaphragm – Speaker Exchange

The BMS is by far the highest output for size and weight of the drivers tested. The low frequency ripple is less than the unit to unit driver frequency response variance. Forums New posts Psx2002 forums.