Bump..no opinions form th audio guru's in here.


brickie

 

If the receiver is powering shakers most of the energy will be below 50Hz. IMHO 40Hz is too high for what you are doing. If your power is down 3db at 40 then at 20 it might be down 10db.

 

I agree with mntmst. But overall I'm confused. Is there such a thing as a receiver spec'd at 40 Hz??? I'd think the cheapest ones can easily be designed and built to go down to 20 Hz. What is it?


Also, I thought that you need a LOT of power to drive a shaker. Doesn't sound like ythis receiver can do that.


Ed

 

Ed, what's up..We got a nice big shaker thread going on over in the accessories forum..go give it a read.As far as power goes, from others doing this most say a 100 watt per channel stereo receiver is enough for 4 shakers or so..In fact a few have said the output can be a little much which is why the remote control of them is nice..


The receiver i mentioned or referred to was a sherwood 4000 something.It's in the CC salespaper for a REAL good price, but it's rated only to 40 hz..I'll keep looking to see what i can find.


brickie

 

Going down to 20Hz is a specification that requires more $..

Lower priced AVRs spec down to 40Hz, but can go lower but not on a continuous all channels driven basis. All should work fine.

 

After visiting stores tonite i see what you mean..Unless i go used it won't be cheap..So you think 40 hz is okay for the sub only channel?


brickie

 

Quote:

Originally posted by brickie After visiting stores tonite i see what you mean..Unless i go used it won't be cheap..So you think 40 hz is okay for the sub only channel? brickie

An AVR does not power the subwoofer, usually its amplifier is built into the subwoofer/cabinet...

 

I completely understand that..What i mean is using the receiver for ONLY bass output to some bass shakers...That's all i'm concerned about!! I just need to get these powered as cheap as possible...They're rated at 4ohms, 50 watts rms, 100 max.Haven't decided about how many i'll be using yet..Some have mentioned though get a receiver that goes as low as possible.. That's why i'm wondering if 40 is enough when 20 is the standard...On higher priced equipment anyway..


brickie

 

Quote:

Originally posted by brickie I completely understand that..What i mean is using the receiver for ONLY bass output to some bass shakers...That's all i'm concerned about!! I just need to get these powered as cheap as possible...They're rated at 4ohms, 50 watts rms, 100 max.Haven't decided about how many i'll be using yet..Some have mentioned though get a receiver that goes as low as possible.. That's why i'm wondering if 40 is enough when 20 is the standard...On higher priced equipment anyway.. brickie

How many channels of amplifiers do you want? 2? 5?

If only 2.. Check out HarmanAudio on Ebay they refurbs of stereo receivers.

If 5, then the best cheap AVR would be likely an entry level Sherwood.

 

Quote:

Originally posted by M Code An AVR does not power the subwoofer, usually its amplifier is built into the subwoofer/cabinet...

If I understand correctly, the shaker is unpowered and it's the amplifier that we're talking about that will power it. I think the primary frequencies that will drive the shakers will be in the 20 - 30 Hz range and so the 40 Hz limit on Sherwood is bad.


brickie - there's no free lunch - I think you're gonna have to dish out the $$ to get an amp that puts out decent power down to 20 Hz.


Ed

 

ED, yeah that's what i figured..And yes i assume you understand what i'm saying..All you need is 2 channels,and yes they aren't powered.


brickie

 

If you want to know if it's better if a subwoofer can womp at under 40 Hz, the answer is not just yes, but a definite yes. In fact, it would be better if it could womp well below 20 Hz. here are some Compact Discs with Extreme Low Frequency Information .


Enjoy,


Will

 

Will i feel you..Iv'e got some extreme bass dvds so i know the benefits..This was for a few of us looking at a cheap REMOTE controlled receiver brand new in box..believe me i know that going down to 8hz would be lovely..We just needed to know if 40 hz would be enogh to get good results with these bass shakers..I believe someone is going to try it so we'll see.For the most part we're talking dvd use only..Which of course there are some demanding dvds out there.


brickie

 

The fact that a receiver is rated from 40 Hz to 20 kHz does not mean that the receiver stops at 40 Hz. All such receivers have response that extends below 20 Hz. The Shewrood RX-4103 receiver you're considering could be rated at 85 to 90 watts per channel from 20 Hz to 20 kHz. The difference in both performance and ratings is miniscule when measured in dB and will have no effect on your use of it to drive the bass shakers. IMO, it is entirely suitable for this use.


We choose to rate the RX-4103 from 40 Hz to 20 kHz to insure that its power rating will reach or exceed 100 watts per channel. For reasons no one can understand, the American CE distribution channel usually rejects receivers rated at less than 100 Watts.


Jeff

 

Jeff i feel you on the last statement..That does appear to be the magical # for shelf bought receivers.I bought a cheap $25 Onkyo yesterday at a flea market so i'm going to play with that one..Works perfect and should have no problems driving the shakers. No remote, but cool thing is it's rated for a 4ohm load.Which is nice dealing with the shakers.Yeah i tried my universal but it was a no go..


brickie

 

Brickie I got a three channel pro amp on the net a while back that drives a couple of subwoofers as well as a set of shakers. It replaced a couple of mono amps I had driving my subwoofers and does very well at what was basically a wash in cost. Prior to that I was driving the shakers with an old Marantz receiver. It did very well but it just didnt seem right to use a vintage Marantz receiver for that lowly purpose.


Brian

 

I feel you Brian.. I believe the Onkyo is happy to be recycled back into use. Can't wait to get this all hooke dup and running.


brickie

 

Brickie:


Thanks for considering the Sherwood RX-4103. All of us here at Sherwood appreciate the thought.


Hope the Onkyo works out, if not I imagine that CC will have the RX-4103 on sale again.


Jeff

 

No problem..there's someone else trying it out right now for this app..They so far like it, so who knows..I may buy one yet.


brickie

 

Hey brickie - what's up with all this "feeling" ?


Ed

 

Hey, after being on a construction sight all day, i gotta show my sensititve side..LOL


brickie

 

Quote:

Originally posted by Stereojeff The fact that a receiver is rated from 40 Hz to 20 kHz does not mean that the receiver stops at 40 Hz. All such receivers have response that extends below 20 Hz. The Shewrood RX-4103 receiver you're considering could be rated at 85 to 90 watts per channel from 20 Hz to 20 kHz. The difference in both performance and ratings is miniscule when measured in dB and will have no effect on your use of it to drive the bass shakers. IMO, it is entirely suitable for this use. We choose to rate the RX-4103 from 40 Hz to 20 kHz to insure that its power rating will reach or exceed 100 watts per channel. For reasons no one can understand, the American CE distribution channel usually rejects receivers rated at less than 100 Watts. Jeff

Jeff,


This is very ironic because IMO I'd come to just the opposite conclusion. If a receiver is only rated down to 40 Hz, I wouldn't touch it with a 10 ft pole. May it does do 20 Hz at just a fraction of a dB down, but then maybe it's 10 dB down at 20 Hz. And like you said, the difference between 85W and 100W is only 1.4 dB which is nothing. Years ago, everybody was using 20-20kHz. What happened to that?


Ed

 

The market changed.


There are fewer dealers. Buyers and consumers alike are less knowledgable. But there are is no shortage of suppliers. In this intensely competitive environment the buyer does not have time to make a thorough study of every product presented to him. Therefore, IMO, buyers set up arbitrary criteria to judge product quality. For receivers, they set the bar at 100 watts. Products that make that benchmark are given additional scrutiny. Products that fall below are dismissed.


Jeff

 

Quote:

Originally posted by Stereojeff The market changed. There are fewer dealers. Buyers and consumers alike are less knowledgable. But there are is no shortage of suppliers. In this intensely competitive environment the buyer does not have time to make a thorough study of every product presented to him. Therefore, IMO, buyers set up arbitrary criteria to judge product quality. For receivers, they set the bar at 100 watts. Products that make that benchmark are given additional scrutiny. Products that fall below are dismissed. Jeff

Jeff, Man you hit it dead on the head..I believe this is one reaosn why many don't look at Harmon Kardon.Strictly by specs alone, all their receivers really seem underpowered.But in the mags, thaty are always thought to have more than enough power..Which from my understanding it's never a continuous 100 watts anyway..Just brief bursts when necessary..


brickie

 

Quote:

Originally posted by Stereojeff Brickie: Thanks for considering the Sherwood RX-4103. All of us here at Sherwood appreciate the thought. Hope the Onkyo works out, if not I imagine that CC will have the RX-4103 on sale again. Jeff

I went ahead and bought the Sherwood and set up 2 Pro Shakers 50W. No problem except I am getting too much high freq reaction (probably between 60-100Hz). I am trying it with different DVD's etc. and trying to find the right volume settings to get the right feel. However, I have not set it up yet in my final configuration - driving 6 shakers all together. Based on what you said it seems that the Sherwood will be okay. I am assuming that you actually have measured it at 20Hz -- what was the power rating?


Got it on sale at CC.