can av integ. receiver driver big size bookshelf speaker?

[derekchan]

it is a mrx740,can it driver 7 unit of 4312g or 7 unit of mk s150 latest edition
do i need expensive ati multi channel power amp to driver these large size speaker with a av processor?
does it worth to upgrade from av receiver with poor power handling to av processor with giant tank ATI power amp

• Number of Power Amps​

  7

• Maximum Continuous Output (1% THD) (20Hz - 20kHz, Two Channels Driven @ 8Ω) Channels: 1~5​

  140 W

• Maximum Continuous Output (1% THD) (20Hz - 20kHz, Two Channels Driven @ 6Ω) Channels: 1~5​

  170 W

• Maximum Continuous Output (1% THD) (20Hz - 20kHz, Two Channels Driven @ 8Ω) Channels: Remaining​

  60 W

• Maximum Continuous Output (1% THD) (20Hz - 20kHz, Two Channels Driven @ 6Ω) Channels: Remaining​

  75 W

• Speaker Impedance​

  >4Ω

​

 

[GIEGAR]

it is a mrx740,can it driver 7 unit of 4312g or 7 unit of mk s150 latest edition
do i need expensive ati multi channel power amp to driver these large size speaker with a av processor?
does it worth to upgrade from av receiver with poor power handling to av processor with giant tank ATI power amp

The short answer is NO. The longer answer requires you to jettison a misconception...

"big size bookshelf..." "large size speaker..." You need to stop looking at the physical size of the speaker - it's not directly relevant to how hard the speaker is to drive &/or whether a power amp is required. Larger speakers are generally more sensitive and therefore dissipate less power to reach a given SPL compared to smaller speakers.

Amplifier requirements depend mainly on speaker sensitivity, listening distance and desired maximum listening SPL's. Here's a couple of decent calculators:

Peak SPL Calculator

This tool calculates the peak sound pressure level (SPL) that your stereo system can deliver to your listening position. For recorded music, you will need to be able to achieve a peak level that is 12 to 18 dB higher than your desired listening level (as measured with an SPL meter).

benchmarkmedia.com

Amplifier power / SPL calculator for home theater THX reference level

A question that frequently comes up when designing a home theater is ‘how powerful an amplifier do I need?’. The answer to the question depends on a few things, in particular how sensitive your speakers are and how far you sit away from them. When we design a home theater we want it to meet...

acousticfrontiers.com

Why/how have you identified seven of either of those particular speakers? (I assume a that's a JBL 4312G?) For a ~$18K multichannel speaker system, they wouldn't be my first choice.