I wouldn’t be using the amplifier in that Pyle receiver. It is likely 80 watts (I can go through the math with you) and probably only designed to put out 10 watts average before the wheels fall off. Might be good enough for background music in a dentists office, but I wouldn’t put it into harder service than that. It was really designed to drive external amplifiers for a main system, and run a limited number of 70v distributed speakers at quiet background levels. I can assure you that those ‘real’ PA amplifiers are better.
The Aux RCA input is for connecting devices such as CD players and MP3 players. Microphones produce a much lower signal level and must be connected to the microphone inputs.
The whole point of the 70V line system is that it allows long lengths of speaker cable to be used with minimum power loss, so you have nothing to worry about regarding loudness. It works like the high voltage electricity lines that carry power across the countryside.
The maximum loudness obtainable from a speaker depends on the wattage tap you use. If you want all five speakers to have the same potential loudness then choose the 20W tap on each of the speakers.
If what wg_ski says about the receiver is correct (I will have another look at the specifications) then we would have to connect an RCA OUT socket on the receiver to an RCA IN socket on one of the amplifiers, using the shortest length of screened cable possible.
P.S. In that case, the 70V line outputs of the receiver would remain unconnected - which doesn't seem to have been the case according to your photograph!
The whole point of the 70V line system is that it allows long lengths of speaker cable to be used with minimum power loss, so you have nothing to worry about regarding loudness. It works like the high voltage electricity lines that carry power across the countryside.
The maximum loudness obtainable from a speaker depends on the wattage tap you use. If you want all five speakers to have the same potential loudness then choose the 20W tap on each of the speakers.
If what wg_ski says about the receiver is correct (I will have another look at the specifications) then we would have to connect an RCA OUT socket on the receiver to an RCA IN socket on one of the amplifiers, using the shortest length of screened cable possible.
P.S. In that case, the 70V line outputs of the receiver would remain unconnected - which doesn't seem to have been the case according to your photograph!
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According to the specifications you linked to, the Pyle receiver is capable of producing 200W into an 8 ohm load, so I can't see why it couldn't drive your five 70V line speakers.
Perhaps wg_ski can look at the specifications and offer more guidance.
Perhaps wg_ski can look at the specifications and offer more guidance.
Extract from the specs:
Technical Specs:
1000 Watts Peak Power
450 watts @ 2 ohms
360 watts @ 4 ohms
200 watts @ 8 ohms
Technical Specs:
1000 Watts Peak Power
450 watts @ 2 ohms
360 watts @ 4 ohms
200 watts @ 8 ohms
Returning to this question. You haven't given details of your paging system, but it probably does plug into the Aux RCA input at the rear of the device. Microphones used on their own would plug into the microphone sockets.
70 volt systems are designed to run over a couple hundred feet without too much loss. It’s what you do. If you want to save 15%, you switch to Geico.
As to the power rating, if it’s really 200 watts RMS, it would work. I don’t trust that number any further than I could throw it. At 17 pounds, I’m skeptical. Measure the power supply voltage, and if it’s +/-75V, then ok I’ll buy it. But if it is really the +/-45V that a “1000 watt PMPO” rating would suggest then its closer to 80 real world watts.
As to the power rating, if it’s really 200 watts RMS, it would work. I don’t trust that number any further than I could throw it. At 17 pounds, I’m skeptical. Measure the power supply voltage, and if it’s +/-75V, then ok I’ll buy it. But if it is really the +/-45V that a “1000 watt PMPO” rating would suggest then its closer to 80 real world watts.
I share your scepticism as there is no mention of RMS in the Pyle's power ratings and I would hesitate to ask bnyus to measure the internal DC supply voltage.
@ bnyus - At this stage, it may be best to await on-site advice from your audio installer.
I don't mind using the "real" PA amps to assure proper function since most are uncertain if the receiver would hold the load. I was just checking to see if i could bypass the amp to avoid having an additional piece of hardware running when not needed.
My paging system is a Bogen UTI1 Universal Telephone Interface.
Manual attached bellow.
My paging system is a Bogen UTI1 Universal Telephone Interface.
Manual attached bellow.
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If you don't require the AM/FM radio function of the Pyle, then I would use the Champion PST-100 amplifier (amplifier 2) as it claims to have an output of 100W continuous RMS power and looks in good condition.
You can see the specifications of the Champions here: https://cdn-docs.av-iq.com/dataSheet//60watts%20mixer%20amplifier.PDF
I'm afraid that I do not know the ins and outs of paging systems!
You can see the specifications of the Champions here: https://cdn-docs.av-iq.com/dataSheet//60watts%20mixer%20amplifier.PDF
I'm afraid that I do not know the ins and outs of paging systems!
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1) the speakers **DO** have a transformer, each of them.
It´s just "hidden" inside the beehive enclosure and they only show outside the power selection terminals.
2) your **speaker** wiring diagram is fine: all speakers in parallel, fed from a common 70V line, each with its own power setting, the total adding up to 100W
3) the receiver to amplifier interconnection is wrong. 😱
It is a "signal level" connection, not a "speaker power level" one, so they are NOT linked by a 70V line, at all, but from signal out at the receiver to some Aux input at the powwr amplifier, probably using RCA shielded wire cables.
You may use "just the receiver" but I think using the specific-for-PA mixer amplifier will be more flexible.
If you want to listen to AM-FM radio as oart of the program, you can connect receiver to mixer-.amplifier.
Yeah, i made a correction as soon as i re-read it after posting, but i wasn't able to edit the post so i posted this right after.
I've attached the latest layout of what i have so far.
Question, on the pre-out on the receiver, there are L/R RCA outputs.
Since the amp is going to receive a single channel, should i combine the receiver L/R channels or should i just use one of them?
I've attached the latest layout of what i have so far.
Question, on the pre-out on the receiver, there are L/R RCA outputs.
Since the amp is going to receive a single channel, should i combine the receiver L/R channels or should i just use one of them?
Attachments
You can take the output from just one the Pyle's pair of Pre Output Jacks i.e. the ones labelled (4) in the receiver's manual.
The Pyle gives a stereo output from its preamp, but you can simply make sure the FM radio is switched to mono (there is a switch on the remote control) and you will only need a single RCA screened cable to connect to the Champion.
It is possible to make a special cable which will combine, or mix, the left and right channels by means of a pair of 1,000 ohm resistors. I can supply details if necessary, but you'd have to be good at soldering!
One question, why does the receiver have to be so far from the Champion? The 70V loudspeaker runs can be as long as you like, but the screened RCA cable should be kept as short as possible. Consequently, I would locate the Champion right next to the Pyle. Is there a problem with that?
The Pyle gives a stereo output from its preamp, but you can simply make sure the FM radio is switched to mono (there is a switch on the remote control) and you will only need a single RCA screened cable to connect to the Champion.
It is possible to make a special cable which will combine, or mix, the left and right channels by means of a pair of 1,000 ohm resistors. I can supply details if necessary, but you'd have to be good at soldering!
One question, why does the receiver have to be so far from the Champion? The 70V loudspeaker runs can be as long as you like, but the screened RCA cable should be kept as short as possible. Consequently, I would locate the Champion right next to the Pyle. Is there a problem with that?
Oh, and another question! On what basis did you select the specific wattage tappings for each of the five 70V line speakers?
For the receiver rca pre-out, won't a rca y splitter work?
I was planning to put the speaker closer in fear that the lines would be too long and signal output would be lost but if what if, as you're saying, the distance isn't that big of a factor, I could simply put the amp right next to the receiver.
As for the tappings, I followed JMFahey's recommendation of selecting a higher wattage for noisy areas and less for quiet ones.
I was planning to put the speaker closer in fear that the lines would be too long and signal output would be lost but if what if, as you're saying, the distance isn't that big of a factor, I could simply put the amp right next to the receiver.
As for the tappings, I followed JMFahey's recommendation of selecting a higher wattage for noisy areas and less for quiet ones.
The RCA splitter would short the stereo channels together which is not a good idea! You would need to use a resistive combiner as I explained in my previous post. I don't think such a combiner lead is commercially available so you would need to have one made. The simplest solution is to use just the right hand channel output and switch the radio to mono.
Yes, put the amplifier next to the receiver as the 70V speaker cables can be as long as your installation requires - no (little) signal will be lost. The RCA lead between receiver and amplifier carries a much smaller signal so is prone to picking up hum and radio frequency interference and for this reason its length best not exceed 5 metres.
Yes, put the amplifier next to the receiver as the 70V speaker cables can be as long as your installation requires - no (little) signal will be lost. The RCA lead between receiver and amplifier carries a much smaller signal so is prone to picking up hum and radio frequency interference and for this reason its length best not exceed 5 metres.
Here is how to make a stereo to mono summing box - see Figure 2 in this Rane note:
Why Not Wye?
P.S. A simpler version can be made by omitting the 20K resistor. Also the 475 ohm resistors can equally well be 1 K ohm resistors.
Even simpler just to use the right hand channel and switch the FM to mono! 😉
Why Not Wye?
P.S. A simpler version can be made by omitting the 20K resistor. Also the 475 ohm resistors can equally well be 1 K ohm resistors.
Even simpler just to use the right hand channel and switch the FM to mono! 😉
See a wiring diagram for an RCA stereo to mono mixer lead in post #8 of: Combine stereo to mono using a Y connector. (summing cable))
Thanks for that info. I never realized how joining RCA channels affected the hardware. I don't really have the time or the experience level to build one adequately (even though i watched some videos of how to). They do sell them online thought, so that's always an option.
But i had a better idea.
Why not make the paging system do what it was built to?
See attached image of connections of new possible setup
Receiver > Page system > amp > speakers
I see no reason why this wouldn't work.
But i had a better idea.
Why not make the paging system do what it was built to?
See attached image of connections of new possible setup
Receiver > Page system > amp > speakers
I see no reason why this wouldn't work.
Attachments
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