2. amps-preamps
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Is too much power in an amp really a problem?

As recently as 8-10 yrs. ago, I maintained my card carrying residence in the ‘lots o’ watts’ camp’ regularly. I’ve since held only a casual attendance to that group, and since departed with the acquisition of higher eff speakers, and lower powered tube amps.

Now I’m debating the future and appropriateness, of that perception and considering another SS, or a non tube amp. This time a digital amp… such as a class D or ICE configuration… as in a Bel Canto, PS Audio, Spectron, Wyred 4 S, etc., to use for both music and HT with my current Silverline speakers.

Several of these amps profess IMO rather high ratings for output power. 250, 300, and 500 wpc into 8 ohms, as your ‘oh by the way’ choices, and then doubling up should the impedance drop off to 4 ohms!

1000 wats per!

E frekin' Gad!

Truth be told, I’ve never put together a high eff speaker & high powered amp combo, nor felt the need, so I’m in a whole new ball game now, or am I?

I understand immense power reservoirs on tap, (like with my former BAT vk500) is a good thing, as well as are other attributes like a good input impedance, and control or damping figures. that amp ran VR4 JRs though, and both have since departed la casa Sunburn.

Additionally, my current tube mono blocks (120wpc) handle my 93db Sonata IIIs quite well IMO. My Odyssey Stratos SE also does a good enough job too rated at about 160 wpc. Between the two amps, the Dodds are the better sounding, and appear to have better control and more ease with the Silverliness.

In making a choice on one of these Digital or ICE amps, should the power numbers be regarded as something other than what they are? I mean more likely, do 250 wpc into 8 ohm rated ICE amps provide likewise results or the same feel, of an SS amp having the same output? Ie., control, power reserves, etc?

I do feel a good match between the speakers and amp is a prime consideration now, and do not wish to buy far too much or too little an amp, given these thoughts.

There too is the thought of the amps actual 'voice' itself to consider.

I sure wouldn’t want to smoke the speaks with too little or too much power on tap. Or have the amp ()s) always loafing. Or is that loafing bit just nonsense?

Any experiences and insights here on the digi power front is more than appreciated as I'm trying to get a 'feel' for this 'new to me' amp topology and not over or under buy.

Thanks much.
blindjim

Showing 5 responses by mapman

mapman's avatar
mapman
21,825 posts
 
"Kijanki is right - an underpowered amp can clip when played loud, and clipping of an amplifier causes high-frequency harmonics that are routed to the tweeter by the crossover, possibly overloading it."

Yes, I have seen more speakers fried this way than any other over the years.
mapman's avatar
mapman
21,825 posts
 
I would not pick an amp on power output alone. This alone will only determine how loud the system will play cleanly.

Alone it is not sufficient to determine how good the amp will sound in your room with your system. There is no simple answer for determing that other than "it depends".

Otherwise, its not a problem.
mapman's avatar
mapman
21,825 posts
 
The OHm F-5 speakers in my system are a good example of speaks that benefit from high power and high current with adequate damping based on my experience and all reports.

They are largely omnidirectional, less than 90Db efficient can move a lot of air, and present a challenging low impedance load at some frequencies.

These are some big, powerful, current hungry beasts. They seem to drink however much juice you throw at them. They need this in order to be able to pressurize a larger room to the extent they are capable. More current/power results in increased dynamics and impact.

Its like comparing the sound produced by a drummer that is bearing down hard as he plays versus one that is more politely striking his kit.

Some day hopefully soon, I will throw one of those SOTA Class D monster amps at them. My expectation is that that will take them to a higher level than possible with my current modest 120W/ch amp.

For speaks that are easier to drive however, this might be overkill and perhaps even a bit risky.

For example, in the case of original OHM Fs, which were notoriously sensitive to being overdriven (their achilles heel), you would be more at risk of over driving the speaker and causing permanent damage to the Walsh driver with a modern day monster amp, I would say.
mapman's avatar
mapman
21,825 posts
 
"Arguments are extremely vulgar, for everyone in good society holds exactly the same opinion."

OW was obviously not an audio buff!
mapman's avatar
mapman
21,825 posts
 
If there is no benefit to higher power in any particular user's case, based on preferred listening SPL, room size, speaker efficiency, etc., then no reason to go there.

It will add cost to do a higher power amp well as Raquel relates so the benefits need matter.
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