FINAL beta question

[mike c]

facts:
1) price difference between the beta 40 and 50 is 90USD
2) MY amp is the yammy rx-v1500
3) the above amp claims to have 120wpc RMS (170max)
4) my other speakers are in my signature
5) except for the sub, which is the velodyne cht12r
6) room size is 13 feet x 23 feet BUT am only using 13 feet x 15 feet (room height is 8-9 feet)

my question IS:

1) does my amp have enough power to run the beta 50? (given the 40 is rated at 10-200w and the 50 is rated at 10-250w ; both at 91db sensitivity)

i ask this because the price diff. is insignificant, the only relevant question is the one above this

 

[mike c]

isnt there a rule of thumb as to what wattage i need to run a speaker that says it can take 10-250w (8ohms)?

 

[mike c]

bump ... anybody?

 

[Sheep]

That Reciever will have no trouble running your speakers, even though the wattages stated are not actually "true".

You would be supprised how much wattage you actually use.


sheep

 

[mike c]

thanks sheep

 

[mulester7]

thanks sheep

.....Mike, while everyone stood in ignorance and utter confusion, the best man in whole forum/site came to your rescue....The Sheep......

 

[mike c]

exactly ... but i wonder why the so many audio-talented individuals here, doesnt have some sort of rule of thumb for my question on this thread.

e.g. 250w max for the beta 50 divide that by 2 because of the over exaggeration by the manufacturer multiplied by 1.1 for good measure = 137.5watts is what you need your amp to churn out RMS! (disclaimer: this is of course a JOKE)

 

[Sheep]

I like that Mule, "The Sheep" my moniker should be "Audio Superhero"




Once that system is all done post in the member system forum Mike



sheep

 

[mike c]

of course "the sheep"!

"the mule",
Yep, that’s a KOI. That’s my main hobby … you see these guys quoting formulas like power=current/something*something=something, etc. etc.? that’s how I am with koi.

 

[Buckeyefan 1]

Koi rule. Man those things can get big.

My advice is to power your speakers with watts equal to or greater than what the speakers can handle. IE If my speakers are rated at 20-300 watts each, I would benefit from an amp that could deliver 300 watts per channel (currently no surround receiver can do this). It's overkill, but the speaker manufacturer designed some of these units to run with a monster power amp up to that mark - 300 watts in the above case. You may never realize the capability of your speakers without some real power behind them.

A lot of guys like two channel music without a sub. Bass pulls the life out of surround receivers, and without knowing it, most receivers won't reproduce the same type of bass response as a separate amp, power being equal.

Your better amplifiers won't have current limiters. Most receivers will. (flagships don't, but again, who's got 300watts per channel?) We may never know when this current limiter kicks in on a receiver, so our bass won't sound distorted to us - just unknowingly lacking. With a large separate amp, with no current limiter, all the power will be delivered to reproduce this bass, and thus IMO will sound better.

 

[mike c]

so you're saying, as long as i use a combo of sub and front speakers, the receiver can concentrate on the mids and highs?

if i were to set the crossover to 80hz, how many percent work left do you think the woofers are left with?

 

[MacManNM]

A lot of people recomend the crossover be set at 80. Doing this, does help hide flaws in your speakers and amp. I disagree with this. Bass is directional at 80 Hz. I always recomend running your fronts at full range, and then cut the sub off at 35 or so. Most good loudspeakers will go down to 35 some even lower (your case I'd cut it around 50). The sub should play the stuff below 50. Running this type of configuration will require an external amp. I always recomend getting an amp that is in the upper realm of your speakers ability. A good 200W/ch amp will do wonders for the sound.

 

[Sheep]

A lot of people recomend the crossover be set at 80. Doing this, does help hide flaws in your speakers and amp. I disagree with this. Bass is directional at 80 Hz. I always recomend running your fronts at full range, and then cut the sub off at 35 or so. Most good loudspeakers will go down to 35 some even lower (your case I'd cut it around 50). The sub should play the stuff below 50. Running this type of configuration will require an external amp. I always recomend getting an amp that is in the upper realm of your speakers ability. A good 200W/ch amp will do wonders for the sound.

Well, you'd think that, but its not the same for every situation. I used to run my mains full but they kept overpowering my subwoofer in the 60 70 range. They sound much cleaner running 90hz and up(yamaha fixed crossover). My mains are rated to 35hz (-6dB I think) but its better left for the subwoofer to handle the low end. As for directional bass, my subwoofer is right beside my tv, so all bass comes from front and center, and this spot also gets rid of some boomyness.


The Sheep

 

[mike c]

well, ill be buying the 7 pieces of beta speakers on oct. 9 (that long because i can only go there on sundays; i need to prepare the cold hard cash)

 

[philh]

well, ill be buying the 7 pieces of beta speakers on oct. 9 (that long because i can only go there on sundays; i need to prepare the cold hard cash)

Which Beta's did you decide on?

 

[mike c]

Which Beta's did you decide on?

beta 50 fronts
c360 center
beta 10s all around

 

[mike c]

3 more days to get my betas and im already feeling pre-buying jitters!
suddenly, im surfing the polk website looking for options to speakers i already ordered!

 

[Sheep]

Don't sweat it. Everyone gets buyers remorse, not because its bad, but they wondered what they could have done elsewhere. Thats why its taking forever for me to decide on a subwoofer. I want low end, but I also want it do be loud. Those betas will rock your world my friend.



The Sheep

 

[mike c]

thanks sheep. 48 hours to go!

 

[philh]

3 more days to get my betas and im already feeling pre-buying jitters!
suddenly, im surfing the polk website looking for options to speakers i already ordered!

I heard the Polk and Beta's in a 1:1 comparison. I liked the sound of the Beta's better. Just trying to justify spending the money.