Quote:
Dionyz wrote:
 THX reference level is 105 dB, which requires 128 watt/ch amp to reach.
Your receiver just cant get there.
Further, dynamic peak content in films and certain music require another 20 to 30 dB.
Thus for 125 dB peak to be reproduced without amplifier clipping, your speakers would require about 16,000 watt/ch. |
THX reference level is 75dB in home 85dB in theaters with the 20-30dB peaks. I am not sure where you got 105dB reference levels, but SPLs of those amount in midrange and treble frequencies would cause hearing damage from extended use.
Quote:
Dionyz wrote:
If anyone want true music and theater reproduction, they really need to focus on speakers with high sensitivity.
Your old speakers with 93 dB/watt would be the lowest efficiency speakers I would even consider. |
While sensitivity is important 93dB/W/M is over doing it. Generally shooting for a sensitivity of 89dB/W/M is more than sufficient, but with a properly designed driver lower sensitivities are okay if coupled with proper amplification.
As far as realistic production goes there are far more important things than sensitivity such as on/off-axis response, cabinet resonance, etc...This is of course assuming sound reproduction without
any degradation at all and maximum pleasure as shown by perceptual research - something few to no commercial speakers are capable of.
Quote:
Dionyz wrote:
I have Klipsch RF-83 with 100 sensitivity which I am driving with a Onkyo 905, which is 140 watts/channel. Even with this high sensitivity, I will be upgrading to an external amp with 500 watts/ch to get the most realistic home theater reproduction (with no clipping). The Onkyo can get the RF-83s to reasonable loudness. However, these spekers love power. The more you give them, the better they sound - not just louder, but bass and percussion gets tighter and more controlled. |
Yes, louder is generally perceived as better, but the Onkyo 905 can easily power those Klipsch speakers to deafening levels. That 500W amp is simply overkill with those speakers 50W is more then enough for typical usage within THX reference levels.