Quicken the burn in time for new speakers by using a cheaper SS amp?

Adding to the earlier comments about the ability of the Yamaha receiver to handle the load that will be presented by the speakers you are purchasing, I would point out that marked on the rear panel of the Yamaha, next to the speaker terminals, are the words "A or B:  8 ohm min/speaker."  Also, it does not have a specified power rating for 4 ohm loads.  So I would definitely not use that receiver with speakers having less than an 8 ohm impedance.

Also, the Yamaha's frequency response is only specified down to 40 Hz, which might lessen its effectiveness in breaking in your woofers.

Finally, I would assume that like most aspects of its design the protection mechanisms it incorporates are designed to a (low) price point.  Which means that if it fails in certain ways it could conceivably damage your speakers.

Regards,
-- Al
 

Buy an old stereo receiver and tune it to a rap station(a heavy bass genre).    Place your speakers close together, hook them up out of phase(with each other) and facing one another, with a blanket over them.  Much of the sound will cancel out that way and not drive you crazy.

When I had my stores, that's the way we always broke in new speakers, except we used FM interstation noise, but same principle.

Also, to be clear when you guys talk about connecting out of phase, we're talking about connecting one speaker properly + to + / - to - and the other pair in reverse + to - / - to +. Is that correct to cancel out the sound waves? Thx

@nycjlee-  Correct!  As I said, " out of phase(with each other)".    

Relax!

Check speaker connections for proper relative phase (+ to + and - to- on each cable from amp to speaker), and absolute phase (reversing or not reversing both left and right channel  + - connections).

Just play music, and listen for sonic stability.

In time, all will be well, if you made a wise speaker choice.