Extremely Frustrated!!! Why won't my amp get loud!?!?!

[ltjenkem]

Alright, I'm in way to many posts on here for good, I'm getting so tired of this game.


I ran an rca out from my computer soundcard, to an active crossover, and out of the 1/4 jack of that to the 1/4 jack of my amplifier.


I ... STILL! Get VERY quiet levels. These are even just tip sleeve plugs now! Not the tip ring sleeve ones.


Someone tell me what is wrong!!?! NADY SPA 2400

[AndrewT]

You need to throw it higher.
Oh, and the carpet it lands on damps out some of the noise.
Rattly floorboard make a good resonator.

[ltjenkem]

I am talking I can power the same speakers on a 90 RMS home stereo amp and make it 5 times as loud.

Its really annoying!


I need to know if it's broken so I can return it to the ebay seller before much more time goes by.

[Michael Bean]

Well, you 're not providing much info to go on. Are you saying that when you substitute a different 90w amp without changing anything else, it's louder, or are you comparing two entirely different systems using the same speakers?

Mike

[ltjenkem]

Nady SPA 2400 Low Sound Level Problem HELP! - YouTube


Here I made a video. It's really long but should provide all the information if you skip around or watch it... Thank you !

[N-Brock]

Have you tried the stereo setting?
Also try using a different male male cord and a different 1/8" to 1/4" adapter.
It seems like something is shorting between channels.

Good luck

-Nelson



Edit: I don't think it's the amp, but I could be wrong.

[Michael Bean]

Hook up the NADY amp EXACTLY the same way that the other lower powered amp was when it worked correctly, AND put the "Parallel/Stereo/Bridged" switch on the back of the NADY in the Stereo position, with it setup that way do you get normal volume levels?

Mike

[Lerg]

Look at the back of that amplifier again, its balanced inputs only. You are feeding the left channel signal (both positive and negative) into the + portion of a single channel input, the right channel is being fed into the - portion of a single channel input.
You cannot feed a stereo signal into any connector on that amplifier, you have to feed mono into each connector for stereo.

From the manual:
The 1/4” TRS phone jacks can also be used for
unbalanced inputs. For TRS phone plugs, simply connect
the unused side of the balanced input to ground. For 1/4”
TS phone plugs, no change is necessary for compatibility
with this input. Balanced input signals are recommended
as they are less prone to AC hum. For long cable runs a
source of less than 600 ohms output impedance is needed
to avoid signal loss. For short cable runs an unbalanced
signal input should be suitable.

For stereo (two-channel) operation, use the inputs for both
CH-A and CH-B; for parallel or bridged mono operation,
use only CH-A input. (See 13-MODE SELECTOR
SWITCHES below for more explanation.)

[ltjenkem]

I have tried the stereo mode. I have also tried alternative cables and adapters as well!

Due to the amplifier on the floor working with unbalanced RCA signal, I can't use the exact same cords, a male 3.5 to male RCA. I have tried reversing that set up though... Same results as this.

From the manual
"The 1/4” TRS phone jacks can also be used for
unbalanced inputs. For TRS phone plugs, simply connect
the unused side of the balanced input to ground. For 1/4”
TS phone plugs, no change is necessary for compatibility
with this input."

I have used my active crossover which takes RCA signal and splits it in two 1/4 outs (Right and left) I then use 2 "guitar" cables (TS) and stereo mode on my amp. Still quiet levels! Even with my crossover boosting the signal to max.

I've tried virtually everything but

1. Balanced signal (or XLR)
2. RCA to 1/4 cables. (Sold by Hosa, on its way in the mail)



"For TRS phone plugs, simply connect
the unused side of the balanced input to ground"

^^What does this mean__ ? ^^


And maybe it is shorting out!? If so, is it an easy repair?
Should I keep the amp and fix it? Or is it possibly trashed?

[ltjenkem]

Oh, a Pyle PTA1400 is on its way. (Yes I know, it's a bad amp) ... I'm using it to power some really weak speakers.

It takes 1/4 as well. I'll be able to do some trouble shooting when it's here.


I also have an Ashly CFT 1800. It's heat syncs fell of in mailing. If I recall, it had the SAME problem this one does though! (I tested it for 20 seconds to make sure it powered up)