Recommendation for new receiver with old speakers

[fzzzt]

Hello,

I'm looking for a receiver/setup recommendation. I moved across the country recently and brought my four old Wharfedale Opal 90s with me, which I bought many years ago. I used to have them in a 5.1 setup for movies (and music sometimes) as front and surround channels (plus center and sub). That was literally 10 years ago, they have been bubble wrapped since then. I bought a cheap Rockville receiver to test them out and amazingly (after moving from NH to 4 different towns in NY to KY to CA over 20 years) they still work 100% and sound good.

Back in my college days when I bought them, I knew little and cared less, and just plugged them into the JVC receiver I had at the time. When I was unpacking them recently, I noticed that they have this on the back by the posts (maybe I knew this back then and just forgot):

Power Handling 175W
Nominal Impedance 4 ohms
Sensitivity 90 dB

I've been struggling to find something that seems like it can drive them safely due to the ohms, but maybe that doesn't matter at home theater sound levels. They do have four 6" drivers in each speaker though. I am not against buying an amp if necessary (never used one before). 6 channels (5.1) is fine for me but those seem to be disappearing with the new tech. I would like to be able to watch 4K movies (I have some blu-ray discs). I would guess the options open up with a separate amp.

Budget wise, lower would be better of course but I was hoping to stay in the 500-1000 range for everything involved audio wise.

I think most importantly I am wondering what I should look for power wise...most receivers I see are something like 75W across 2 channels at 6 ohms, which seems bad for this situation (but I don't really know). Actual receiver model recommendations would be great, too, though. I guess I could sell the the speakers for something else but would rather not...

 

[PENG]

Hello,

I'm looking for a receiver/setup recommendation. I moved across the country recently and brought my four old Wharfedale Opal 90s with me, which I bought many years ago. I used to have them in a 5.1 setup for movies (and music sometimes) as front and surround channels (plus center and sub). That was literally 10 years ago, they have been bubble wrapped since then. I bought a cheap Rockville receiver to test them out and amazingly (after moving from NH to 4 different towns in NY to KY to CA over 20 years) they still work 100% and sound good.

Back in my college days when I bought them, I knew little and cared less, and just plugged them into the JVC receiver I had at the time. When I was unpacking them recently, I noticed that they have this on the back by the posts (maybe I knew this back then and just forgot):

Power Handling 175W
Nominal Impedance 4 ohms
Sensitivity 90 dB

I've been struggling to find something that seems like it can drive them safely due to the ohms, but maybe that doesn't matter at home theater sound levels. They do have four 6" drivers in each speaker though. I am not against buying an amp if necessary (never used one before). 6 channels (5.1) is fine for me but those seem to be disappearing with the new tech. I would like to be able to watch 4K movies (I have some blu-ray discs). I would guess the options open up with a separate amp.

Budget wise, lower would be better of course but I was hoping to stay in the 500-1000 range for everything involved audio wise.

I think most importantly I am wondering what I should look for power wise...most receivers I see are something like 75W across 2 channels at 6 ohms, which seems bad for this situation (but I don't really know). Actual receiver model recommendations would be great, too, though. I guess I could sell the the speakers for something else but would rather not...

You may or may not have to worry as it may or may not be difficult to find the right amp for those speakers.

Without getting into details, suffice to say that it is a big audio myth that 4 ohm nominal speakers are hard to drive, when no other information are given. That said, on all else being equal basis, 4 ohms nominal speakers naturally needs higher current so yes, that means they are often harder to drive.

For example, 4 ohms, 90 dB sensitivity could be much easier to drive that 8 ohms, 84 dB sensitivity, but that's also over simplifying.

In theory, strictly speaking, any amplifier, even AV receivers, can drive 4 ohms nominal speakers depending a quite a few other factors. There are 4 ohm nominal speakers that also have poor phase angles and dips below 3 or even 2 ohms, that just another example why you need more information about the speakers, such as the impedance vs frequency curve itself instead of just one number.

You may want to try an online calculator such as the ones linked below, to get some ideas in you specific use and go from there:

Peak SPL Calculator (hometheaterengineering.com)
Peak SPL Calculator - Benchmark Media Systems
SPL Calculator: How Loud Will Your Amplifier and Speakers Go? | Home Cinema Guide (the-home-cinema-guide.com)

 

[AcuDefTechGuy]

Yamaha or Denon AVR is often a good choice.

 

[Mikado463]

Remember your College days, 'knew little, couldn't care less' ? re-live them, you'll be fine ......

 

[jfortado]

What is your top end budget?

 

[Teetertotter?]

avr receivers at Crutchfield
yamaha receiver at Crutchfield

 

[Verdinut]

Those Wharfedale Opal 90's should be easy to drive. If they are 4 ohm speakers, their impedance is not to dig below 3 ohms for sure. Weird impedance curves are recent occurrences on products of some incompetent manufacturers.

Wharfedale is a reliable firm and the OP should not worry with any receiver which is designed to drive 4 ohm speakers.

 

[jfortado]

avr receivers at Crutchfield
yamaha receiver at Crutchfield

You will get more out of those particular AVR selections when paired with high sensitivity speakers.

 

[Verdinut]

You will get more out of those particular AVR selections when paired with high sensitivity speakers.

It all depends. In a typical home living room, amp power of only a couple of watts provides adequate average SPL for most speakers with an average sensitivity. The Opal 90's have a sensitivity of 90 dB which is slightly above average.

Everything depends on your listening distance from the speakers and the loudness at which you usually listen to the music. An AVR with power of 70 watts/ch is adequate for most situations. For example, 100 watts is less than 2 db louder than for the 70 watt amp.

 

[ALBERT_JOHN232]

Your Wharfedale Opal 90s are 4-ohm, 90 dB sensitivity speakers, which really aren't as difficult to drive as many people assume. The impedance rating alone doesn't tell the whole story, and a decent AVR with a solid power supply should have no problem driving them at normal home listening levels.


If your budget is around $500–$1,000, I'd look at models like the Denon AVR-X1800H or a comparable Yamaha AVR. Both offer modern HDMI features for 4K Blu-ray playback, room correction, and enough power for a typical 5.1 setup. If you later decide you need more headroom, you can always add an external amplifier, but I wouldn't buy one until you find the receiver is actually struggling.


Before replacing speakers that still sound good, I'd spend a little time figuring out your room size, listening distance, and target volume. Those factors usually matter more than the difference between a receiver rated at 70 W/ch versus 100 W/ch.


On a side note, if you're organizing your gear or documenting older equipment, I sometimes use Emoji Vista when I need clean symbols or icons for notes and labels. And if you're cataloging vintage equipment or keeping track of when you bought it, a Chronological Age Calculator can be handy for calculating the exact age of components. Neither is essential for your setup, but they've been useful tools for me.


I'd definitely keep those Wharfedales for now—they've already proven they survived years of storage and moves, and if you still enjoy how they sound, there's no reason to replace them just because they're older.