I'm thinking a bedroom. I just need something to plug my iPhone with Spotify into, or hook my computer with Spotify into. Budget isn't a big deal. $100-$500 would be ideal, but I'm open to flexibility.
You might want to look into some powered studio monitors. Jbl lsr308 can be had for around $250 right now on jbl’s website. Specs state a frequency range down to about 37hz, but from this link it looks like it’s more around 45 hz-3dB
http://noaudiophile.com/JBL_LSR308/
Another great option, especially if you want an onboard dac with direct usb connectivity to a PC, Bluetooth connectivity, and a remote control would be the Klipsch R-15pm. Those can be had for about $350 on eBay
https://m.ebay.com/itm/Klipsch-R-15PM-Powered-Bluetooth-Monitor-Speakers-Pair-Ebony/253283598629?epid=901257197&hash=item3af8e10125:g:ulEAAOSwIJlaHd~R
They also feature a subwoofer output if you wanted to add more low end. The speakers themselves get about 50hz -3dB in room, which is adequate for stuff like rock, but a bit thin for electronic music. I own the unpowered r-15m and for the price, you will be hard pressed to find a better speaker. Very neutral sounding, tight bass, fantastic imaging, and very resolving of detail.
The high efficiency also gives plenty of headroom with relatively little power. A buddy of mine has a pair hooked up to a cheapo lepai amp that was bench tested by old school stereo on YouTube at 7wpc. My friends room is 18x15, and about 8’ away we were able to get 98dB out of them before the amp clipped. The built in amplification should offer enough power to drive them loud enough to damage your hearing.
Last Christmas I had the 15ms set up in my bedroom connected to an old onkyo receiver rated at 100wpc. I was trying to get the music loud enough to hear throughout the house (from an upstairs room), and had them cranked up so loud that the SPL measurement inside the room was 114dB, yet the sound remained nice and clear with no sign of distortion.
A Dayton sub 1000 could be added for around $100, and will extend the low end to about 30hz in room, which is plenty for music. Despite their low cost, I find them to be quite musical. Both the sub 1000 and sub 1500 I own measure pretty flat outdoors, and have low group delay above the tuning frequency.
Those are just two off the top of my head, there are plenty of other options I’m sure others will add.
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