100W, 200W, or 300W?


I'm pretty new to this and could use some help. Working down my list of upgrades: did speakers, room treatment on order... I think next up is to replace my amp.

I'm currently using a Harman Kardon PA2000 stereo amp that I had sitting in storage. 100 WPC @ 8 Ohm. It's "OK", but it probably the weak point in my system right now.

For speakers, I picked up B&W 805D3 tabletops with stands.

88 dbSPL sensitivity, 8 ohm. They recommend 50-120W @ Ohm for the amp power on their site.

I pulled up an amplifier calculator and plugged in some numbers:

88 sBSPL, 8 ft distance, 85 dB volume w 15 dB headroom and this came out to 3W RMS w 94W peak

I have my heart set on blue watt meters so I see the following options:

1) MA5300 @ 100 WPC, no autoformers, integrated
2) MA7200 @ 200 WPC, has autoformers, integrated
3) MC302 @ 300 WPC, has autorormers, seperates


For the MA5300, I'm concerned that there isn't enough headroom. If I even get close to the 94W peak, it means that I'm pushing the amp to the max, so I'd probably be operating in an area of reduced sonic performance since it's being stressed. Is this a correct assumption?

The MA7200 looks like it'll leave plenty of headroom and it also has (for better or worse) autoformers which seems to be what puts the "mac sound" in macs.

The MC302 is just sexy as heck... but is there any realistic gain with my current set up that I would get by buying one of these? Or is it so much overkill that I am just throwing money away at this point?
eisenb11

Showing 2 responses by elliottbnewcombjr

I just looked at the MA5300, I think you are making a wise choice. I don’t know anything about digital beyond CD’s, so I have no idea what it doesn’t have, but the MA352 appealed to me when I saw it’s a tube/ss hybrid, remote control, still has blue meters for you, additional power, (for the future, I agree with you, 100 watts are enough)

I don’t know the price of either one. Buy a used one? McIntosh comes with 3 year warranty, is it transferable? In any case, they are essentially bullet proof, so if you find a good deal on one you can return, or, one you can buy an extended warranty, i.e. square trade, I would go for that.

You didn’t mention, but both of these have MM Phono Input, you will get there some day!

I didn’t see a remote control for MA5300 (many OEM’s forget to show or mention them), MA352 has one, I would want remote volume, and remote balance to improve imaging of CD’s and LP’s, some of which are not quite spot on. A very slight balance adjustment can make a surprising difference.

My office, I went Vintage: some nice 2 way bookshelf speakers from B&W, and a self powered Velodyne sub, a Carver Cube Amp, Reel to Reel, TT, and my computer sound for YouTube, Pandora, CD, DVD, ... Monitor dead center, wonderful imaging, audio or audio/video. I control inputs, volume, balance via my Chase Remote Line Controller, RLC-1, I would never live without one, that solves any amp/preamp with no remote control.

and have set myself up with a perfect equilateral triangle listening spot, wow, terrific. I had to rebuild my office bookcases and desk to make that happen, so glad I did.

Adjustable Crossover, external or built in the sub like mine is, removes low bass before the bookshelf speakers, so they don’t try to make bass they cannot do without distortion and poor volume levels. That helps them shine. Sub just to add a bit, not too much, not aware of it unless I turn it off. Same thing with the sub in the home theater, primarily there for Jurassic Park Dinosaur Stomp.
watching blue meters is a short lived thrill, then you will want to turn them off and 'see' the music not the meters. IOW, look around at other stuff now. btw, the meters show nothing, unless you change the setting to measure a low power range, because you rarely need much power, except when you do!

McIntosh SS will not sound, they will simply disappear, theoretically ideal, yet .... I sold mt MC2250, rated 250 wpc, actually tested accurate to 305 wpc at McIntosh Lab day at Harvey's NYC the day it was given to me.

Used for years, eh, sold, got McIntosh tube tuner/preamp, made in 1962, fantastic, into tube amp.

Yes you can change the speakers, sell them, then you will take a loss, BUT, you will need less power, use your existing amp until you pick a new LOWER power amp, i.e. LOWER cost (helps with the loss selling the speakers), AND, you will be set up to try tube amp now or in the future.