#21
|
|||
|
|||
Quote:
|
#22
|
||||
|
||||
Quote:
__________________
Dan STUDIO - McIntosh C1000C/P, MC2301 (2), MR88, Aurender N10, Esoteric K-01X, Shunyata Sigma spdif digital cable, Sonos Connect, PurePower 2000, Stillpoints, Furutech Flux 50, Michell Gyro SE, Michell HR Power Supply, SME 309, Ortofon Cadenza Black, Wireworld, Sonus faber Amati Anniversario LIVING ROOM - McIntosh C2300, MC75 (2), MR85, Magnum Dynalab 205, Simaudio MOON Neo 260D-T, Schiit Audio Yggdrasil, Aurender N100H, Shunyata Sigma USB cable, Micro Seiki DD40, Ortofon Cadenza Blue, Nakamichi BX-300, Sony 60ES DAT, PS Audio P10, Furutech Flux 50, Sonos Connect, Stillpoints, Wireworld, Kimber, PMC EB1i, JL Audio f113 VINTAGE - McIntosh MA230, Tandberg 3011A tuner, Olive 04HD, Sony DTC-59ES DAT, McIntosh 4300V, JBL 4312A Last edited by jdandy; 08-19-2011 at 10:09 PM. |
#23
|
|||
|
|||
And then there are Peak Consult speakers. Let me know if you find anything more stable.
|
#24
|
|||
|
|||
Quote:
|
#25
|
||||
|
||||
Jeremy.......Wikipedia explains it better than I could.
Impedance variations of the load with frequency translate into variation in the phase relationship between the amplifier's voltage and current outputs. For a resistive load, usually (but not always) the voltage across the amplifier's output devices is maximum when the load current is minimum (and the voltage is minimum across the load) and vice-versa, and as a result the power dissipation in those devices is least. But due to the complex and variable nature of the driver/crossover load and its effect on the phase relationship between the voltage and current, the current will not necessarily be at its minimum when the voltage across the output devices is maximum - this results in increased power dissipation in the amplifier output stage which manifests as heating in the output devices. The phase angle varies most near resonance in moving coil loudspeakers. If this point is not taken into consideration during the amplifier design, the amplifier may overheat causing it to shut down, or cause failure of the output devices. Here's the link to the entire artical on electrical characteristics of dynamic loudspeakers: Electrical characteristics of dynamic loudspeakers - Wikipedia, the free encyclopedia
__________________
Dan STUDIO - McIntosh C1000C/P, MC2301 (2), MR88, Aurender N10, Esoteric K-01X, Shunyata Sigma spdif digital cable, Sonos Connect, PurePower 2000, Stillpoints, Furutech Flux 50, Michell Gyro SE, Michell HR Power Supply, SME 309, Ortofon Cadenza Black, Wireworld, Sonus faber Amati Anniversario LIVING ROOM - McIntosh C2300, MC75 (2), MR85, Magnum Dynalab 205, Simaudio MOON Neo 260D-T, Schiit Audio Yggdrasil, Aurender N100H, Shunyata Sigma USB cable, Micro Seiki DD40, Ortofon Cadenza Blue, Nakamichi BX-300, Sony 60ES DAT, PS Audio P10, Furutech Flux 50, Sonos Connect, Stillpoints, Wireworld, Kimber, PMC EB1i, JL Audio f113 VINTAGE - McIntosh MA230, Tandberg 3011A tuner, Olive 04HD, Sony DTC-59ES DAT, McIntosh 4300V, JBL 4312A |
#26
|
||||
|
||||
Dan,
At least in the bass, this does not look as a stable impedance to me but more like the valleys and mountains of the Alps where we had our last vacations.
__________________
There are two means of refuge from the miseries of life: music and cats Albert Schweitzer |
#27
|
||||
|
||||
You guys have stumbled upon the realities of speaker design. Impedance specs are usually nominal, an average. It is a mathmatical repesentation. Two things are important considerations; 1) impedance generally is lowest at low frequencies and, if too low, can suck up a huge portion of your amp's power. 2) as frequency gets higher impedance increases thus making it more difficult for your amp to drive higher frequencies. to rated output.
__________________
System: ML:5206,5302 Serafino's Nordost Lumin U1 RM15 |
#28
|
||||
|
||||
That is impressive.
__________________
2CH: W4S DAC-2, W4S STP-SE, W4S SX-500, Custom ScanSpeak/SEAS Towers, Hot Rodded Rega TT and Jolida JD9 Phono Pre, Asynch PC Transport, WireWorld Gold Eclipse 6 XLR HT: Marantz AV7005, W4S Mini MC-5, Custom Waveguide Towers, SVSPB12-Plus/2 |
#29
|
|||
|
|||
Ian, I'm not surprised about Stereophile not reviewing the larger PMC speakers. I remember reading some years ago somewhere that John Atkinson doesn't much care for transmission line designs. I've also heard that PMC has been criticized about the published measurements of their speakers. I've owned IB2s, MB2s and now MB2is - and frankly I don't much care how they are designed or their measurements. I simply like the way they sound.
|
#30
|
|||
|
|||
Quote:
|
|
|
Audio Aficionado Sponsors | |