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cooking_with_gas
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Joined: Aug 12 2021 - 11:44am
Matching speakers to a Yamaha A-S201

Hi there,

I have an old Awia PX-E80 and have just purchased a Yamaha A-S201 amp. Obviously this is entry level and I am looking for some speakers to match the amp. The amp is rated as 100W 8Ω.

After doing a lot of reading, I am thoroughly confused about how to match the amp's specs to speakers. Should I be looking for speakers close to 100W / 8Ω, higher, lower ?

I'm thinking about either:

- Dali Spektor 2 (80W, 6Ω), CHF 249.00 (I'm in Switzerland)
- Cambridge Audio Minx XL, (100W, 8Ω) CHF 179.00
- Jamo S801 (60W / 120W 8Ω). CHF 151.00

(I have no idea why the Jamo has 2 Watt ratings, maybe 60W per speaker?)

It's easy to find a review on any of these speakers on the internet saying they all are great (for the price). I wonder if these reviews are somewhat biased, but in any case I can't work out which ones will best match the amp.

I'd want to not buy speakers that are so mismatched to the amp that I (or my teenager) might accidentally blow them. I'm not expecting miracle sound with this setup, but would really appreciate any advice.

Many thanks

Amp specs:

• Minimum RMS output power: 100 W + 100 W (8 Ω, 40 Hz to 20 kHz, 0.2% THD)
• Dynamic power per channel (IHF) (8/6/4/2 Ω) 125 W/150 W/165 W/180 W
• Maximum power per channel
(4 Ω, 1 kHz, 0.7% THD) 115 W
• Input sensitivity/Input impedance (1 kHz, 100 W/8 Ω)
PHONO (MM) 10.0 mV/47 kΩ
CD, etc. 500 mV/47 kΩ

cooking_with_gas
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More confusing

Hmm, on this website https://www.qacoustics.co.uk/blog/2017/08/14/beginners-guide-matching-speakers-amplifiers/ it says

"The bottom line:
Our general advice would be that it’s fine to connect speakers with a higher impedance to an amplifier capable operating with a lower impedance, but what you shouldn’t do is connect speakers with a lower impedance (say, 4 ohms) to an amplifier with a higher minimum impendence (10 ohms, for example)."

Then in the amp specs:

• Minimum RMS output power
(8 Ω, 40 Hz to 20 kHz, 0.2% THD) 100 W + 100 W
• Maximum power per channel
(4 Ω, 1 kHz, 0.7% THD) 115 W

So now I am even more confused.

hoytis
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Joined: May 19 2021 - 10:37am
Don't worry too much about ohms

You'll do fine with any of those speakers. The blog is correct about matching ohms, but that's the extreme. Ohm ratings are just a baseline guide, as speaker impedance fluctuate wildly when used. Essentially, speakers rated 8 or 6 ohms are safe...but you would need to pay more attention if looking at 4 ohm speakers. Yes, you could hook them up to an 8 ohm amp and it would be fine at moderate volume, but if you were cranking it up for hours on end, then you run the risk of damage. If the speakers are 10, 8 or 6 ohms, you don't need to worry about it with your amp.

I think what's more important when matching amp and speakers is to check speaker sensitivity (dB) ratings. That specifies how easy they are to power. All those choices you mention have low sensitivity (as most bookshelfs do) and require some decent power to get the most out of them. Your amp will do great. Again, these ratings are just guidelines, but what you don't want is to hook up a 15 watt amp to any of these speakers. It would just have to work way too hard to drive such speakers and burn out. Same goes for hooking up a 200 watt amp connected to highly sensitive speakers (e.g. 95 dB), you'll overpower and distort.

Bottom line, don't focus so much on ohms (unless speakers are 4 and below), and keep an eye on watts and sensitivity. And I'd get the Dali's :)

Old Audiophile
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Suggestion(s)

I would recommend emailing Yamaha, as I think they would likely give you the best guidance. Also, if possible, I would recommend a visit to a reputable audio shop, preferably a high-end shop with extensive expertise, for advice but, more importantly, for critical listening with something exactly like your Yamaha receiver or as close to it as possible. Some shops might allow you to bring in your receiver for demonstration purposes.

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