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What Amp and Sub?

post #1 of 6
Thread Starter 
I've recently been given some Mordaunt Short MS-302 speakers from a neighbour, because they were moving and didin't need them. I want to purchase an amplifier and a sub-woofer to pair up with them, but am at a loss of what are the best options.

Here are the specifications of the speakers:

Frequency Response at 3dB
100Hz to 20kHz
In room frequency bandwidth
-6dB at 62Hz / 28kHz
Sensitivity SPL/m/2.83V
86dB
Cross Over Frequency
-
Effective Volume
-
Nominal impedance
4-8 Ohms
Amplifier Power Range
15 to 75 watts
Dimensions (HxWxD) in mm
180x112x130

I have a budget of around £300. If knowing my music taste is useful, then i mostly listen to bass-heavy music like drum and bass and dubstep. For this reason i'd like to weight the money a bit more towards an awesome sub. One more reason is that the speakers are fairly small, obviously bookshelve ones, and probably lack a bit of low end oomph.

Input-wise it doesn't need anything flashy like ipod docks, im fine with a 2xphono to a 3.5mm.

Thanks for reading and please offer any suggestions!
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post #2 of 6
Are you wanting to get a full scale amp/reciever (think home theater), or do you want pretty simple two channel stuff?

The speakers you have are nothing amazing, but for free I wouldn't complain about them at all. The biggest thing I notice about them is that they are relatively inefficient (Sensitivity of 86dB). This means for the same volume as a more efficient speaker, you'll have to give these speakers more power.

I'm not up to date enough on things to really recommend certain equipment to you, but hopefully I can get you started.

For a sub that mainly plays music, having a really LOW ( <30hz) response range isn't all that important because music really doesn't go that deep. Loudness will be more important to you there.

Look for a company that pretty much only makes subs. I would look primarily at SVS, HSU Research, and Velodyne, although there are for sure some other good companies and subs out there.

Something like the Velodyne VX11 or HSU STF-2 would probably do nicely.

For a normal receiver look at Denon, Marantz and Onkyo.

Hopefully this gets you started in the right direction smile.gif.
post #3 of 6
Thread Starter 
Thanks for the response! I really am quite clueless about audio equipment so any explanations are very helpful.

I've been doing some research and have come up with the following:

I'm going to buy either the Yamaha AS300 or AS500. They are exactly the same, only the AS500 has more power. If i stick with my current speakers ill get the 300, but i'm being tempted to buy some new, more powerful ones and that might benefit from having the 500. One other factor is that my current speakers only respond to 100Hz, and the amp cuts off any frequency sent to the sub above 90Hz, so theres going to be a 10hz hole that i dont have any sound in....im guessing thats bad.

The speakers i may be buying are the Wharfedale Diamond 9.1 speakers. These are rated at 100W, 6 Ohm and 86Db. The max output of the AS500 is 120W with 4 ohm speakers, so with 6 ohms its probably near to 100W which will work nicely.

The sub im getting is the Wharfedale SW150, which from the looks of things is a great sub. 150W, 35-110Hz response.

It might be worthwhile mentioning that i'm a student, and this is a big purchase for me. I'm not looking for the best system on the planet, im just trying to get a really nice setup to make my room super chilled. I listen to mostly drum and bass, dubstep (the real stuff not skrillex), and ambient varieties of both.

Thanks for reading.
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post #4 of 6
Hello azzy,

You won't have a "hole" of missing response between 90-100hz. The result would be more like a very very mild dip in response there, completely non important when you consider the vary large response variations caused by various room nodes for everything from about 200hz down... Furthermore, most receivers should allow you to adjust the x-over point, Most have many options, often in the 40-200hz range. For those little speakers, a crossover above 100hz might not be a bad idea if you can find a sub placement that doesn't cause problems with that.

Regards,
Eric
     
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post #5 of 6
Yep, you should be able to crossover your to your sub to help take the low end from your bookshelves. Most will let you change where the crossover is, but not all will. "Normal" is 80Hz, but the best setting will have to be determined by the speakers, the placement/room and what your preferences are.

The specs for your speakers also state that they will play to 62Hz, but with a 6dB loss in volume producing that note. The 100Hz to 20,000Hz is its "flat" response, where it will play any of those frequencies at roughly the same volume.

For listening at the computer, I don't think you'll need the extra power of the 500. Heck, my Denon 1800 I use for HT has 75wpc, and I've never had it anywhere near maxed. So even though a speaker is rated for a certain amount of power, doesn't mean it needs that much to work.

Also, I'm a student as well, so I completely understand the whole being poor thing tongue.gif. What I did was look in the local classifieds/craigslist for a cheap deal on an older receiver. My Denon was a $600 amp in '99, and I picked it up for $75 and it has worked flawlessly. Since many people are upgrading receivers to ones with HDMI you can get older stuff for cheap right now.

Good luck smile.gif.
post #6 of 6
I just bought the Bic American F12 12 inch off amazon. great reviews I get it Thursday. Ill let you know how it ise. I also bought the Polk Audio monitor 70's Floor standing Speakers off newegg and they are great. The only problem is one of the tweeters was broken and they take forever to ship the replacement part.
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