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Need help with Yamaha P-125 external speakers
#2814174 02/12/19 05:37 PM
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Lend27 Offline OP
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I am trying to connect external speakers to my Yamaha P-125.
I have some KRK Rokit 5 powered monitor speakers. They are 50 watt.
I connected them to the Yamaha using balanced XLR to TRS connectors. The Yamaha has L and R line outs.
The problem is the volume out of the speakers is much lower than I expected.
I am assuming that is because the Yamaha only has 7 watt amplifiers for the internal speakers. But I am not sure.
Do you guys know of anyone who has connected powered KRK or similar monitors to a Yamaha P-125 or similar keyboard?
Thanks for any help you can provide.
Len

Re: Need help with Yamaha P-125 external speakers
Lend27 #2814180 02/12/19 05:50 PM
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I run the 2 outs on my 115 into a small usb mixer which goes to a couple of small M audio monitors. It is way louder than I can stand. You might consider a small mixer or preamp of some sort.

Re: Need help with Yamaha P-125 external speakers
Lend27 #2814182 02/12/19 05:55 PM
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I assume you're using the XLR end of the cable at the monitors and the phone plug end at the piano? I suspect that won't work well.

The manual does not say whether the piano aux out is balanced or unbalanced. But I'm guessing unbalanced. So you'll need a TS plug at the piano end of each cable.

Also, try using the RCA unbalanced input at the monitors. This is usually around 14 dB more sensitive than the balanced input. You'll need an RCA male connector at the monitor end of each cable.

Opinions anyone?

Here's such a cable on Amazon: https://www.amazon.com/d/RCA-Cables/Hosa-CPR-201-Stereo-Interconnect-Cable/B000068O16
[Linked Image]

Re: Need help with Yamaha P-125 external speakers
MacMacMac #2814195 02/12/19 06:20 PM
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Lend27 Offline OP
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I’m going to try the cable you referenced from Amazon. If it doesn’t improve the sound I will look into a preamp.
Thanks for such quick response guys!

Re: Need help with Yamaha P-125 external speakers
Lend27 #2814220 02/12/19 07:12 PM
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Whether this works or not ... you absolutely do not need a preamp.
Preamps take millivolt level microphone signals.
The piano is producing a line level signal that is 1000x stronger than what a preamp expects. No good.

Re: Need help with Yamaha P-125 external speakers
Lend27 #2814260 02/12/19 07:59 PM
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Originally Posted by Lend27
I’m going to try the cable you referenced from Amazon. If it doesn’t improve the sound I will look into a preamp.
Thanks for such quick response guys!


I would not do anything before checking with either the place where you purchased it or the Yamaha Corporation technical support.

Maybe even the company which produced the monitors.


I cannot believe that you need anything "special" to hook up those monitors.


Good Luck


Don

Casio PX-S1000, Focal Professional CMS 40 near-field monitors, SennHeiser HD 559 Headphones, Pianoteq and numerous other VSTs (Seldom Used), Focus Rite Scarlett 2i2 Audio Interface, Yamaha MG06 Mixer
Re: Need help with Yamaha P-125 external speakers
Lend27 #2814264 02/12/19 08:03 PM
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Originally Posted by MacMacMac

The manual does not say whether the piano aux out is balanced or unbalanced. But I'm guessing unbalanced. So you'll need a TS plug at the piano end of each cable.

Also, try using the RCA unbalanced input at the monitors. This is usually around 14 dB more sensitive than the balanced input. You'll need an RCA male connector at the monitor end of each cable.

Opinions anyone?


Those cables should work fine. A simple "unbalanced - to- unbalanced" link, with the P125 putting out _roughly_ a line-level signal into the Rokit's, should have no problems.

Be careful, when adjusting the volume knob on the Yamaha, to _not_ overload the Rokit's.

. . Set the Rokit gain control to the center of its range;

. . Set the Yamaha volume knob to 0;

. . . Play the Yamaha, and raise the volume knob on it until the Rokit's are playing at a realistic volume.

. . . If you're at full volume on the Yamaha, _only then_ raise the gain on the Rokit's.

Report back, please -- I'm sure _something_ can go wrong . . . <g>


. Charles
---------------------------
PX-350 / microKorg XL+ / Pianoteq / Lounge Lizard / EV ZXA1 speaker
Re: Need help with Yamaha P-125 external speakers
MacMacMac #2815351 02/14/19 07:05 PM
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Lend27 Offline OP
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Originally Posted by MacMacMac
I assume you're using the XLR end of the cable at the monitors and the phone plug end at the piano? I suspect that won't work well.

The manual does not say whether the piano aux out is balanced or unbalanced. But I'm guessing unbalanced. So you'll need a TS plug at the piano end of each cable.

Also, try using the RCA unbalanced input at the monitors. This is usually around 14 dB more sensitive than the balanced input. You'll need an RCA male connector at the monitor end of each cable.

Opinions anyone?

Here's such a cable on Amazon: https://www.amazon.com/d/RCA-Cables/Hosa-CPR-201-Stereo-Interconnect-Cable/B000068O16
[Linked Image]


This cable worked fine :-)
Thanks for your help guys!
Len

Re: Need help with Yamaha P-125 external speakers
Lend27 #2966205 04/12/20 05:48 PM
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Originally Posted by Lend27
Originally Posted by MacMacMac
I assume you're using the XLR end of the cable at the monitors and the phone plug end at the piano? I suspect that won't work well.

The manual does not say whether the piano aux out is balanced or unbalanced. But I'm guessing unbalanced. So you'll need a TS plug at the piano end of each cable.

Also, try using the RCA unbalanced input at the monitors. This is usually around 14 dB more sensitive than the balanced input. You'll need an RCA male connector at the monitor end of each cable.

Opinions anyone?

Here's such a cable on Amazon: https://www.amazon.com/d/RCA-Cables/Hosa-CPR-201-Stereo-Interconnect-Cable/B000068O16
[Linked Image]

This cable worked fine :-)
Thanks for your help guys!
Len

Sorry for digging the thread. I purchase this cable(10 feet) and try to connect between p125 and a nad amplifier, but no sound comes out. Do I miss anything? thanks


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