Anybody know what the status of the second iteration of Purifi amps. These new ones are supposed to be much more powerful than the 200 watt first version.
Best High Current amplifiers stable into low impedances
Seems like all I hear when reading Stereophile’s measurements when it comes to speakers: must be used with a High current amplifier stable at 2 Ohm. Most amplifiers rarely give specs related to 2 ohm loads. Most amplifiers are only stable into 8 and 4 ohm loads, and if they mention 2 ohm it seems they aren’t saying continuous, but peak, short term power.
With speakers becoming more complex and harder to drive, what are some high current amplifiers that have no problem with these 2 ohm or lower impedance speakers?
Showing 6 responses by yyzsantabarbara
I went through the 2 Ohm dance with my now sold Thiel CS3.7 speakers. I thought newer speakers were easier to drive. The amp I am likely going to get for my Livingroom is the KRELL KSA i400. It is 400 watts of Class A (depending on demand) at 8 Ohm. It doubles down to 800, and then 1600 watts. It is supposed to be able to double again to 3200 if your power source can provide the current. I do not think that 400 watts of Class A will double, nor half. I remember an interview with the designer where he said it stays at 400 watts of Class A when it is doubling. SoundStageNetwork.com | SoundStage.com - Talks I have the KRELL Dou 175XD that has similar tech as this new amp. I love the 175XD, which I use as a headphone amp (’ear speaker amp’). The CODA #16 also doubles into 8 - 4 - 2. It is a great sounding amp. |
I just checked the VTV site and the specs are not too bad. 950W @ 2Ω 500W @ 4Ω 250W @ 8Ω (2) Bruno strikes again. Purifi 1ET7040SA VTV Amplifier. Sinad 109. 950 watts. - YouTube
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I think I I need to give one of these amps a try before I buy an old school amp for my Livingroom. I love the sound of the Benchmark AHB2 (that is no sound). Though the AHB2's power in 2 Ohm is lacking in stereo and definitely in mono. The Purifi modules are supposed to be almost as good as the AHB2 but with better power specs at 2 Ohm.
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I may have misinterpreted the OP's question. I believe there is a difference between HIGH CURRENT vs WATTS. Can anyone set me straight on that. I am considering the excellent 150 watt CODA #16 (which is supposed to be high current) vs some other amps that have a lot more watts. Are there scenarios where the CODA #16 could be considered a better match for a 2 Ohm hard to drive speaker vs an amp with more watts? CODA #16 specs Maximum current: 100 amperes per channel Power supply: 3KVA power transformer/ Dual independent rectification and 280,000 of power supply filter capacitance |
Here is another new amp that doubles down in Class A and is not big and heavy. It uses similar tech as the new KRELL iBias way of doing Class A. Not real Class A as stated by companies like Gryphon. @secretguy So a classic speaker like the Thiel CS3.7 is really improperly designed?
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