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Iphone to speaker amp - Page 2

post #16 of 31
Thread Starter 
If I use the LOD I would need a new dac, the E7 would work
post #17 of 31
Thread Starter 
I'm just I little confused, I don't know all the terminology and technical information about everything
post #18 of 31
Quote:
Originally Posted by Kylemcg View Post

If I use the LOD I would need a new DAC, the E7 would work

DAC - Digital to Analog Converter

 

The LOD (Line Out Dock) cable is an analog signal, which means the audio signal has already passed thru the iPhone's DAC chip.

post #19 of 31
Quote:
Originally Posted by Kylemcg View Post

If I use the LOD I would need a new dac, the E7 would work

 

No, LOD is line out dock, which is an analogue signal, no need for a DAC.

 
In every digital audio system, there is:
- Source (digital files like MP3, or a CD)
- Transport (reads the digital file, like an iPod or CD player)
- DAC (converts the digital signal into a line-level analogue signal)
- Amp (amplifies the analogue signal to drive headphones or speakers)
- Transducer (headphones or speakers)
 
Your iPhone is a transport, DAC, and amp, all at the same time. If you plug your headphones into the iPhone's headphone port, then you are using all three functions.
 
If you use a LOD (line out dock) to get the analogue line-level signal, then you are using the iPhone's DAC, but bypassing the built-in amp. You would connect the line-out to your external amp.
 
If you extract the digital signal through USB, then you are using the iPhone as a transport only. You are bypassing the built-in DAC and amp. You would connect the USB cable to your external DAC.
post #20 of 31
Quote:
Originally Posted by Kylemcg View Post

I'm just I little confused, I don't know all the terminology and technical information about everything

You could still tell us what make/model amp you are looking at wink.gif
post #21 of 31
Thread Starter 
Amp I'm looking for is cerwin vega cv1800, I'm will be upgrading from a onkyo tx-???? Receiver.
post #22 of 31
Quote:
Originally Posted by Kylemcg View Post

Amp I'm looking for is cerwin vega cv1800, I'm will be upgrading from a onkyo tx-???? Receiver.

How do you plan to hook four speakers up to that? It's a 2 channel amp with 1 left/right set of speaker outputs.

It's also only 1800 watts in "mono" into 4 ohms.
post #23 of 31
Thread Starter 
Ok, so a big speaker amp will work the same as my Fiio, I just have to have the music playing with my LOD. I have an apple 30 pin LOD, could I get a lightning to 30 pin adapter, would that work for LOD, because on ios 6, it wouldn't work.
post #24 of 31
Thread Starter 
I asked around because I dontk ow all of this stuff. If we just used this amp with two of the speakers, do you think that would be good for a 2000 square foot room?
post #25 of 31
Thread Starter 
I only plan on having stereo sound, I'm not sure if you could power 2 speakers out of 1 set of terminals, but I'd imagine that wouldn't be a good idea.
post #26 of 31
Thread Starter 
We just got all four of these speakers, we could return 2 of them pretty easily if it would just be overkill to find an amp that would work for them
post #27 of 31
Quote:
Originally Posted by Kylemcg View Post

Ok, so a big speaker amp will work the same as my Fiio, I just have to have the music playing with my LOD. I have an apple 30 pin LOD, could I get a lightning to 30 pin adapter, would that work for LOD, because on ios 6, it wouldn't work.

 

What model iPhone do you have?

post #28 of 31
Quote:
Originally Posted by Kylemcg View Post

I asked around because I dontk ow all of this stuff. If we just used this amp with two of the speakers, do you think that would be good for a 2000 square foot room?

Sure. The CVs are high sensitivity speakers. They should do quite well.

Although I would recommend looking at the Behringer EP4000 EUROPOWER over the CV amp. I think you'll find lots more reviews for it, and I know people that have had it. It also has been found to measure well (produces power that it says it does; not all amps do). Don't buy the CV just for the name. Get the best amp you can for your money smily_headphones1.gif
Quote:
Originally Posted by Kylemcg View Post

I only plan on having stereo sound, I'm not sure if you could power 2 speakers out of 1 set of terminals, but I'd imagine that wouldn't be a good idea.

It's possible to wire up two sets of speakers to a 2 channel amp like that, but not necessarily a great idea. See this page: http://www.amplifiedparts.com/tech_corner/speaker_impedance_power_handling_and_wiring.

The problem is that the two methods of wiring each change the impedance (ohms) that the amplifier sees. Wiring in series, the amplifier will see higher impedance. That's not necessarily a problem for the amp, but the amp will put out less power at a higher impedance. In the other wiring situation--parallel--the amp sees lower impedance. That can be a problem if the amp is not rated for the lower impedance. It can have overheating problems and/or shut down because it will try to put out more power. So you shouldn't spend several hundred dollars on a power amp with the assumption that you can wire up four speakers to it until you investigate more. smily_headphones1.gif
Edited by cel4145 - 9/24/13 at 11:16am
post #29 of 31
Quote:
Originally Posted by Kylemcg View Post

I asked around because I dontk ow all of this stuff. If we just used this amp with two of the speakers, do you think that would be good for a 2000 square foot room?

I had Wharfedale speakers with 88db sensitivity powered by a 35watt per channel NAD, and they were enough to have people not hear each other when cranked up to 1:00, and that was a roughly 1600sqft room with a pool and children splashing water on one side (speakers, dry guests on the other side). Even the ones by the pool asked me to turn down my "beach music" (I was blasting Hed Kandi).
post #30 of 31
Thread Starter 
That ep4000 seems a bit overkill to use with 2 500 rms watt speakers, would the ep2000 be better
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