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Re: Sufficient Amp for M60s - Large Bedroom
austinbirdman #398331 11/01/13 03:13 PM
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Hello Austin,

Before you press "Buy", it's worthwhile to carefully read the specifications for the Dayton Audio amplifier:

Features and Specifications: • Measured power output: 2 x 75 watts RMS (into 4 ohms @ less than 0.01% THD) • Signal-to-noise ratio: greater than 100 dB • Class A/B design topology • Input impedance: 47k ohms • Auto-on sensitivity: 3 mV • Voltage requirement: 120/230 VAC, 60/50 Hz •

Note that the specs are misleading. The amp is rated to produce 75 watts per channel into 4 ohms, not 8 ohms. So you should expect roughly half the 75-watt rating into an 8-ohm load like the M60s. Companies rely on consumers NOT reading specs carefully, so they cheat by quoting misleading power output specs.

Regards,
Alan


Alan Lofft,
Axiom Resident Expert (Retired)
Re: Sufficient Amp for M60s - Large Bedroom
austinbirdman #398335 11/01/13 04:06 PM
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Hey JohnK.

The Crown calculator is probably cited so often as it comes up as the first hit on Google. I used to cite another calculator but I couldn't find it so I was indeed lazy.

I'll consider my hands appropriately slapped.


With great power comes Awesome irresponsibility.
Re: Sufficient Amp for M60s - Large Bedroom
alan #398336 11/01/13 04:22 PM
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Hmmmm, my parade is feeling rained upon - but I respect your love of power, Alan.


"These go to eleven."
Re: Sufficient Amp for M60s - Large Bedroom
austinbirdman #398337 11/01/13 04:40 PM
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It's not so much a love of power, but a love of honestly stated power output ratings. To get the power you want with your M60s, you could get two of these amps, and run them in bridged mode, one per channel, which would yield 150 watts per channel, bridged, into an 8-ohm load, if we can trust the Dayton specs.

As is, run in a stereo mode, you'd be getting about 37 watts per channel into 8 ohms, which isn't a lot of power.


Alan Lofft,
Axiom Resident Expert (Retired)
Re: Sufficient Amp for M60s - Large Bedroom
Murph #398339 11/01/13 08:09 PM
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Originally Posted By: Murph
I'll consider my hands appropriately slapped.

Slapped AND shamed on the same day?

You better consider coming up with a safe word, Murph. grin


::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::
Re: Sufficient Amp for M60s - Large Bedroom
austinbirdman #398341 11/01/13 11:22 PM
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just get some Outlaw amps.


M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85


Re: Sufficient Amp for M60s - Large Bedroom
austinbirdman #398342 11/02/13 02:00 AM
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Birdman, the "rain" would appear to be just a light drizzle. The APA150 is rated in compliance with the FTC power amplifier regulations. The theoretical maximum increase between an 8ohm and 4ohm rating is a doubling into 4 ohms, but this is almost never achieved in practice. More typical results are around a 50% increase, which would imply about a 50 watt 8ohm rating. 50 watts would be used for a peak of about 101dB, rather than 103dB with 75 watts.

It's unlikely that these slight power differences would be appreciable in your bedroom setup.


-----------------------------------

Enjoy the music, not the equipment.


Re: Sufficient Amp for M60s - Large Bedroom
austinbirdman #398354 11/03/13 05:51 PM
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All the advice here encouraged me to keep looking, so I jumped on Craigslist, and lo and behold, found one of these for a mere $150, in perfect condition:

Sonamp 275 BBE

The thing sounds awesome. Fills the room just fine and I've now got a great new critical listening space with the M60s. It's got a genuine 75w per speaker at 8 ohms. There's a gimmicky sound equalizer mode for iPods, but with that off, it's great, auto/on etc. And the enhanced mode might even help some of the higher res MP3s, since this is a Sonos all-digital setup (most of the music is in Apple lossless).

Much better than owning two Dayton APA150s, and cheaper too.


"These go to eleven."
Re: Sufficient Amp for M60s - Large Bedroom
austinbirdman #398363 11/03/13 10:58 PM
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Good for you. It's always fun to get cool stuff and saving money.Have fun.


M3 and
M80
Re: Sufficient Amp for M60s - Large Bedroom
MarkSJohnson #398366 11/04/13 12:33 PM
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Originally Posted By: MarkSJohnson
Originally Posted By: Murph
I'll consider my hands appropriately slapped.

Slapped AND shamed on the same day?

You better consider coming up with a safe word, Murph. grin


I said "it" a bunch of times. Either nobody cares or "it" is a poor choice of safe words.


With great power comes Awesome irresponsibility.
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