Monoprice Commercial Audio 4x120W 4-Channel/4-Zone Mixer Matrix 100/70V with Digital Media Player (No Logo)
Product # 18802
UPC # 889028047880
$648.99
*Affirm is not available for business or international orders
This item has been discontinued
Qty: 1
$648.99
Qty: 2-9
$648.99
Qty: 10-19
$648.99
Qty: 20-49
$648.99
Qty: 50+
$648.99
Customers Also Shopped For
Questions and Answers
Do not include HTML, links, references to other stores, pricing or contact info.
My question is about:
If your question is about more than one item, click + to add them.
Browse 14 questions
Browse 14 questions
and 22 answers
Have purchsed this amplifier to use in a 70V system primarily got Background Music. All speakers connected and working fine. The issue is the volume levels. The USB /Mp3 player have full volume.. but I cannot get any volume when using the mic inputs (Channels 1 & 2) and only minimal volume when using the line level RCA inputs (Chnl 4 & 5) from external stereo music source on Channels 4 & 5. I did try a mic pre-amp ahead of the mic input (channel 1 ) to boost the mic level and was able to get the amplifier to work properly with the adequate ducking of signal when sensing mic 1 source material. I should not have to do this though.. I am using dynamic mics (not requiring 48v) and have tested the mics and cables on other equipment. As for the RCA line inputs.. I have to turn both the source channel (Input #4) and the Zone Levels (Zone 1-4) to max level (all the way) get any sort of volume output to the speakers and it is still very low . In comparison I only have to turn the Zone Levels to #2 level to get similar audio output from the USB input source... I am sure my wiring is a good and I have not overlooked some obvious selection on the front panel push buttons. I have many years as an audio engineer and have exhausted my ideas as to what may be wrong bother than the 4 zone amplifier may not be fully functional. Looking for assistance please?
New User U
on Oct 22, 2018
BEST ANSWER: Using the remote control turn the USB module down to about 6-7. The 3 XLR and 2 DUal RCA inputs all have independent Gain Controls on the back. Try turning them up to about 75-80% full. Adjust if you hear distortion. The gains are set pretty low from our factory to prevent less experienced users from blowing up speakers. Be sure XLR switches on back are set to MIC if you do not require phantom power. If you continue to have trouble please contact Tech support.
- Reply
- Inaccurate
- Dave L Staff on Oct 23, 2018
BEST ANSWER: Using the remote control turn the USB module down to about 6-7. The 3 XLR and 2 DUal RCA inputs all have independent Gain Controls on the back. Try turning them up to about 75-80% full. Adjust if you hear distortion. The gains are set pretty low from our factory to prevent less experienced users from blowing up speakers. Be sure XLR switches on back are set to MIC if you do not require phantom power. If you continue to have trouble please contact Tech support.
- Reply
- Inaccurate
- Dave L Staff on Oct 23, 2018
I have this amplifier and using for similar reasons. Mine is working fine. I use a tablet for streaming music and a microphone occasionally that does require 48v. The only thing i had to do was adjust the gain on the back next to the inputs. I get tons of signal and have to be conscious to keep it out of the red. Sounds like you know what you are doing. Possibly a bad amp?
- Reply
- Inaccurate
- Doug G on Oct 23, 2018
- Purchased on Dec 3, 2017
There’s a small gain adjustment by the mic inputs on the back. This should help.
- Reply
- Inaccurate
- Judith C on Oct 23, 2018
- Purchased on Mar 16, 2018
There are some gains on the back of the amp. You can adjust with a flat head.
- Reply
- Inaccurate
- john h on Oct 23, 2018
- Purchased on Apr 30, 2018
Vote for the best answer above!
Channel 1 seems to override the other channels. If I have a mic in channel 1 for example it will cut out everything in the other channels. Same happens if I have music in channel 1. Anything sending a signal will mute 2 3 and 4. Any ideas as to why, or how to fix it?
A shopper
on May 7, 2018
BEST ANSWER: Channel 1 has Priority. This is to allow announcements and emergency instructions to override background sounds. If you are not using the Telephone Paging input you can close the priority circuit. Just insert a small cable between the 2 Priority connections on the back of the unit.
- Reply
- Inaccurate
- Dave L Staff on May 14, 2018
BEST ANSWER: Channel 1 has Priority. This is to allow announcements and emergency instructions to override background sounds. If you are not using the Telephone Paging input you can close the priority circuit. Just insert a small cable between the 2 Priority connections on the back of the unit.
- Reply
- Inaccurate
- Dave L Staff on May 14, 2018
I have this amp. I use my mic in channel 1 and my music in channel 5. I believe channel 1 incorporates 'ducking' which means when there is signal present it takes priority and mutes or lowers the volume of other channels. It works well for us because we are using it as background music and the mic as an announcement only situation. I would suggest not using channel one for anything if you just need it to be a multi-channel amp with several inputs.
- Reply
- Inaccurate
- Doug G on May 14, 2018
- Purchased on Dec 3, 2017
Is there a way to permanently turn the priority off?
- Reply
- Inaccurate
- Jason S on Sep 27, 2021
- Purchased on Jul 12, 2021
Vote for the best answer above!
Is there a wall plate control to use in 70V mode?
David S
on Feb 23, 2021
BEST ANSWER: My installation was in a convenient rack location so I did not use remote control. I don't believe there is a wall plate but there is RS232 that could be controlled by Crestron or the like.
- Reply
- Inaccurate
- David C on Feb 23, 2021
- Purchased on May 27, 2020
BEST ANSWER: My installation was in a convenient rack location so I did not use remote control. I don't believe there is a wall plate but there is RS232 that could be controlled by Crestron or the like.
- Reply
- Inaccurate
- David C on Feb 23, 2021
- Purchased on May 27, 2020
It does not come with any wall plate controller. But according to the manual you can add an in wall volume controller.
- Reply
- Inaccurate
- magyver7 on Feb 24, 2021
- Purchased on Nov 24, 2020
I didn't see that as an option but it does have an input for RS232 control.
- Reply
- Inaccurate
- Doug S on Feb 24, 2021
- Purchased on Feb 2, 2021
Vote for the best answer above!
Is there any cheap way to adjust the volume remotely?
IT Department A
on Aug 9, 2017
BEST ANSWER: Thank you for your interest in this commercial amplifier. The matrix amp does have RS232 control. Please refer to the downloadable User's Manual for all necessary codes. You can also use one of our in-wall volume controllers when used in 8Ω mode.
- Reply
- Inaccurate
- Dave L Staff on Aug 21, 2017
Monoprice Speaker Volume Controller RMS 100W (Rotary Type) - White
BEST ANSWER: Thank you for your interest in this commercial amplifier. The matrix amp does have RS232 control. Please refer to the downloadable User's Manual for all necessary codes. You can also use one of our in-wall volume controllers when used in 8Ω mode.
- Reply
- Inaccurate
- Dave L Staff on Aug 21, 2017
Monoprice Speaker Volume Controller RMS 100W (Rotary Type) - White
Yes, Volume controls. I just installed a system with 3 different areas and used 9 Volume controls. Worked great. Customer was very pleased
- Reply
- Inaccurate
- jeff on Aug 21, 2017
- Purchased on Aug 7, 2017
Vote for the best answer above!
How many of Product # 13684 can be wired in parallel and/or in series per channel?
Jonathan W
on Nov 10, 2017
Monoprice Commercial Audio 4x120W 4-Channel/4-Zone Mixer Matrix 100/70V with Digital Media Player (No Logo)
Monoprice Alpha Ceiling Speakers 6.5in Carbon Fiber 2-way (pair)
BEST ANSWER: It depends upon how many Ohms in total you are trying to accomplish. Identical speakers in series (similar to Christmas tree lights) add up with each speaker sharing the applied power. The other method of parallel connection of speakers lowers the total resistance as seen by the driving amplifier - a far more dangerous and damaging type of connection if too many are connected in parallel improperly draws excessive current from the amplifier. This would be the best application for a 'speaker selector/impedance matching" device. Those have 'transformers' that 'upscale' each speaker's impedance so that the driving amplifier is not overloaded. The downside of those devices is the labor and wiring necessary to bring each speaker's cables back to one location - a lot of attic work!
- Reply
- Inaccurate
- Hector J. R on Jan 16, 2019
BEST ANSWER: It depends upon how many Ohms in total you are trying to accomplish. Identical speakers in series (similar to Christmas tree lights) add up with each speaker sharing the applied power. The other method of parallel connection of speakers lowers the total resistance as seen by the driving amplifier - a far more dangerous and damaging type of connection if too many are connected in parallel improperly draws excessive current from the amplifier. This would be the best application for a 'speaker selector/impedance matching" device. Those have 'transformers' that 'upscale' each speaker's impedance so that the driving amplifier is not overloaded. The downside of those devices is the labor and wiring necessary to bring each speaker's cables back to one location - a lot of attic work!
- Reply
- Inaccurate
- Hector J. R on Jan 16, 2019
2 left 2 right per channel
- Reply(2)
- Inaccurate
- Mike C on Nov 10, 2017
I need to run as many as 8 speakers per zone. How do I make that happen?
- Reply
- Jonathan W on Nov 10, 2017
I just want to confirm 4 speakers can be wired to each zone(or 2 speakers per channel). Each zone has a 4ohms, 70v, or 100v wiring option. 4 of these Alpha speakers wired in parallel would be 2ohms of total impedance, which to much for the 4ohms label. I don't see a connection for both left and right channels on each zones output, so I don't understand your prior answer of "2 left 2 right per channel". Just on the input do I see left and right options. If I understand it correctly, both the left and the right channels are combined on the output. How should I connect 4 of these speakers on a zone when the label says 4ohms is the impedance? In parallel? which terminal, 4ohms, 70v, 100v?
- Reply
- Jonathan W on Dec 8, 2017
Vote for the best answer above!
I am looking to power 14 speakers in a restaurant. Would this power 14 of the 8" ceiling speaks also sold here at Monoprice?
Joel O
on May 21, 2017
Monoprice Commercial Audio 4x120W 4-Channel/4-Zone Mixer Matrix 100/70V with Digital Media Player (No Logo)
Monoprice Black Back Ceiling Speakers 8in 2-Way Fiber with Covered Crossover (pair)
BEST ANSWER: Thank you for your question. You would be able to use the 15699 speakers, however, you would have to wire the speakers in parallel but you would only be able to have a total of 8 speakers. If you wished to use the 18802 amplifier, it would be best to go the route of utilizing it as a Constant Voltage system. Which would require speakers like Product # 14887.
Should you require additional assistance, please reach out to our technical support team with a detailed question via any of the methods available here:
https://www.monoprice.com/help?pn=contact
Our knowledgeable Technical Support staff would be more than happy to assist. Thank you
Should you require additional assistance, please reach out to our technical support team with a detailed question via any of the methods available here:
https://www.monoprice.com/help?pn=contact
Our knowledgeable Technical Support staff would be more than happy to assist. Thank you
- Reply
- Inaccurate
- Mark P Staff on May 25, 2017
BEST ANSWER: Thank you for your question. You would be able to use the 15699 speakers, however, you would have to wire the speakers in parallel but you would only be able to have a total of 8 speakers. If you wished to use the 18802 amplifier, it would be best to go the route of utilizing it as a Constant Voltage system. Which would require speakers like Product # 14887.
Should you require additional assistance, please reach out to our technical support team with a detailed question via any of the methods available here:
https://www.monoprice.com/help?pn=contact
Our knowledgeable Technical Support staff would be more than happy to assist. Thank you
Should you require additional assistance, please reach out to our technical support team with a detailed question via any of the methods available here:
https://www.monoprice.com/help?pn=contact
Our knowledgeable Technical Support staff would be more than happy to assist. Thank you
- Reply
- Inaccurate
- Mark P Staff on May 25, 2017
Vote for the best answer above!
Do Need to use the satellite speakers? Can I just use the sub with my 70v system? Can I use 4 of these subs with your 4x120w mixer/amp and also use the 6.5" 70v speakers? will all these components work together?
ANDREW D
on Jun 12, 2017
Monoprice Commercial Audio 4x120W 4-Channel/4-Zone Mixer Matrix 100/70V with Digital Media Player (No Logo)
Monoprice BGM 4.1 Indoor Outdoor 6.5-Inch sub with 4 x 2.5-Inch Satellites, 70V and 8-ohm incl Mounting Hardware (No Logo)
Monoprice Commercial Audio 70V 6.5-inch Weatherproof 2-Way Speakers with Wall Mount Bracket (Pair)
BEST ANSWER: You do not need to use the satellites. You can use with additional 6.5" speakers. Just run them all parallel. do not use the sub outputs as they are only 8Ω outs.
- Reply
- Inaccurate
- Dave L Staff on Jun 13, 2017
BEST ANSWER: You do not need to use the satellites. You can use with additional 6.5" speakers. Just run them all parallel. do not use the sub outputs as they are only 8Ω outs.
- Reply
- Inaccurate
- Dave L Staff on Jun 13, 2017
Vote for the best answer above!
Can this simultaneously playback 4 different mp3 files, one per zone?
Luke L
on Aug 30, 2017
BEST ANSWER: Thank you for your interest in this commercial audio amp. No, the internal mp3 player can only play one file at a time.
- Reply
- Inaccurate
- Dave L Staff on Sep 19, 2017
BEST ANSWER: Thank you for your interest in this commercial audio amp. No, the internal mp3 player can only play one file at a time.
- Reply
- Inaccurate
- Dave L Staff on Sep 19, 2017
Vote for the best answer above!
how many sets of the bgm 4.1 speakers can i run with this amp in 70v mode?
New User U
on Sep 5, 2017
Monoprice Commercial Audio 4x120W 4-Channel/4-Zone Mixer Matrix 100/70V with Digital Media Player (No Logo)
Monoprice BGM 4.1 Indoor Outdoor 6.5-Inch sub with 4 x 2.5-Inch Satellites, 70V and 8-ohm incl Mounting Hardware (No Logo)
BEST ANSWER: Thank you for your interest in our commercial audio products. The 4x120 amp is advised to run 70V load to 96W max per output channel (x4). The BGM system has 60W and 30W taps with 70V operation. You can safely run 1 @ 60W and 1 @ 30W per output channel for a total of 8 BGM systems. You can run all BGM @ 30W and power 12 total systems.
- Reply
- Inaccurate
- Dave L Staff on Sep 19, 2017
BEST ANSWER: Thank you for your interest in our commercial audio products. The 4x120 amp is advised to run 70V load to 96W max per output channel (x4). The BGM system has 60W and 30W taps with 70V operation. You can safely run 1 @ 60W and 1 @ 30W per output channel for a total of 8 BGM systems. You can run all BGM @ 30W and power 12 total systems.
- Reply
- Inaccurate
- Dave L Staff on Sep 19, 2017
Vote for the best answer above!
hello, what is the maximum number of 70V speakers that can be connected to this amplifier ?
New User U
on Jul 21, 2019
BEST ANSWER: To calculate maximum number of speakers you you simply add the power rating of the speakers used together. You want the total power to equal less than the total output of the amp. For best long-term use you should only run the amp to 80% of toal power. This 4-zone amp has 120W amps so you should only run it to 96W. Our lowest power 70V speaker is our 4" commercial series that has a 1.25W tap. You could run up to 307 speaker in this configuration.
- Reply
- Inaccurate
- Dave L Staff on Jul 22, 2019
Monoprice Commercial Audio 20W 4 inch Coax Ceiling Speaker with ABS Back Can & Grill 70V (NO LOGO)
BEST ANSWER: To calculate maximum number of speakers you you simply add the power rating of the speakers used together. You want the total power to equal less than the total output of the amp. For best long-term use you should only run the amp to 80% of toal power. This 4-zone amp has 120W amps so you should only run it to 96W. Our lowest power 70V speaker is our 4" commercial series that has a 1.25W tap. You could run up to 307 speaker in this configuration.
- Reply
- Inaccurate
- Dave L Staff on Jul 22, 2019
Monoprice Commercial Audio 20W 4 inch Coax Ceiling Speaker with ABS Back Can & Grill 70V (NO LOGO)
Vote for the best answer above!
Can two sources be routed to the same zone at the same time?
A shopper
on Jul 2, 2020
BEST ANSWER: Yes, any combination of sources may be routed to a particular zone independently of what is going to the other zones
- Reply
- Inaccurate
- David C on Jul 2, 2020
- Purchased on May 27, 2020
BEST ANSWER: Yes, any combination of sources may be routed to a particular zone independently of what is going to the other zones
- Reply
- Inaccurate
- David C on Jul 2, 2020
- Purchased on May 27, 2020
Vote for the best answer above!
How can I download an operators manual?
Geren M
on Jul 20, 2021
BEST ANSWER: This link is at the bottom of the product description page:
https://downloads.monoprice.com/files/manuals/18802_Manual_181218.pdf
https://downloads.monoprice.com/files/manuals/18802_Manual_181218.pdf
- Reply
- Inaccurate
- Daniel H on Aug 12, 2021
- Purchased on Mar 27, 2021
BEST ANSWER: This link is at the bottom of the product description page:
https://downloads.monoprice.com/files/manuals/18802_Manual_181218.pdf
https://downloads.monoprice.com/files/manuals/18802_Manual_181218.pdf
- Reply
- Inaccurate
- Daniel H on Aug 12, 2021
- Purchased on Mar 27, 2021
Vote for the best answer above!
Can the channels be bridged?
Frederick J
on Aug 9, 2021
BEST ANSWER: No bridging capability on this.
- Reply
- Inaccurate
- Daniel H on Aug 12, 2021
- Purchased on Mar 27, 2021
BEST ANSWER: No bridging capability on this.
- Reply
- Inaccurate
- Daniel H on Aug 12, 2021
- Purchased on Mar 27, 2021
Vote for the best answer above!
Can you connect an iPhone or iPad to the USB port for audio playback via Spotify, Pandora, etc.? If so, will it also charge the connected device? Thanks.
James G
on Jan 20, 2018
Questions For Similar Products
Reviews
3.8 / 5.0
6 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
3
1
1
0
1
Rated 4 out of 5
Works but with some RS232 issues
I needed a matrix switcher for a background music office audio system. We were able to make this device work, but we did have some issues getting there. The built-in 70V amplifier was a bonus for us and one fewer component to buy.
The built-in radio does not work at the same time as the built-in Bluetooth receiver, because they use the same ?input? on the switcher. It would seem that could have been designed better, but we put in an external tuner so we could have both functions simultaneously.
Our biggest issue was with the RS232. If I used a terminal program and sent one command at a time by typing them in, they seemed to do what they were supposed to. However when I put them into a table and fired commands at it, the commands shifted, and different switches kept happening. After spending hours trying to figure out what was going on, I finally decided that it was consistent. So through trial and error, I figured out what each command was actually doing and relabeled everything.
The other RS232 issue is that there is no buffering of commands, and the device doesn?t listen when it?s in the middle of a switch. So every command needed time to process before sending the next command. Not waiting results in missed or wrong switches.
Now what I really wanted was an audio matrix switcher, but since this is a mixer, I had to disconnect all of the undesired inputs before connecting the desired input. But remember, everything requires a delay. So now every switch requires 2.5 seconds during which time the user interface has to be blocked so some impatient person isn?t sitting there queuing up a bunch of commands.
The RS232 cannot control the volume. I knew that going in, but that just means the user couldn?t control volume from the touch panel.
Ultimately we were able to make it work satisfactorily, so everyone is happy with the end result. Now that I have the idiosyncrasies worked out, the next time will go more smoothly. We are controlling the matrix mixer using a Crestron 3-series processor via RS232.
The built-in radio does not work at the same time as the built-in Bluetooth receiver, because they use the same ?input? on the switcher. It would seem that could have been designed better, but we put in an external tuner so we could have both functions simultaneously.
Our biggest issue was with the RS232. If I used a terminal program and sent one command at a time by typing them in, they seemed to do what they were supposed to. However when I put them into a table and fired commands at it, the commands shifted, and different switches kept happening. After spending hours trying to figure out what was going on, I finally decided that it was consistent. So through trial and error, I figured out what each command was actually doing and relabeled everything.
The other RS232 issue is that there is no buffering of commands, and the device doesn?t listen when it?s in the middle of a switch. So every command needed time to process before sending the next command. Not waiting results in missed or wrong switches.
Now what I really wanted was an audio matrix switcher, but since this is a mixer, I had to disconnect all of the undesired inputs before connecting the desired input. But remember, everything requires a delay. So now every switch requires 2.5 seconds during which time the user interface has to be blocked so some impatient person isn?t sitting there queuing up a bunch of commands.
The RS232 cannot control the volume. I knew that going in, but that just means the user couldn?t control volume from the touch panel.
Ultimately we were able to make it work satisfactorily, so everyone is happy with the end result. Now that I have the idiosyncrasies worked out, the next time will go more smoothly. We are controlling the matrix mixer using a Crestron 3-series processor via RS232.
- Was this review helpful? Yes (0) No (0)
- Flag as Inappropriate
- Was this review helpful? Yes (0) No (0)
- Flag as Inappropriate
Rated 5 out of 5
Work great!
We love this product, easy to have all of our music locations adjustable on one device
- Was this review helpful? Yes (0) No (0)
- Flag as Inappropriate
- Was this review helpful? Yes (0) No (0)
- Flag as Inappropriate
Rated 5 out of 5
I spent a long time looking at multi-zone amps and came across this one by accident and it is exactly what we are looking for. Being able to control which inputs go to which zones is incredibly helpful!
- Was this review helpful? Yes (0) No (0)
- Flag as Inappropriate
- Was this review helpful? Yes (0) No (0)
- Flag as Inappropriate
Rated 3 out of 5
I just set it up and found that the EQ for each channel has no extra Bass when you rank the Bass knob? Also in the instructions it shows how to set the Time and Date but this amplifier doesnt have time and date its just allows Blue Tooth and FM tunner only?
- Was this review helpful? Yes (0) No (0)
- Flag as Inappropriate
- Was this review helpful? Yes (0) No (0)
- Flag as Inappropriate
Rated 1 out of 5
Bought three
Installed the first one and discovered there is a considerable amount of white noise when no audio is present.
The second one shot sparks out of the side and tripped the breaker when we plugged it in.
Third one is in route. Don't know what it will do.
The second one shot sparks out of the side and tripped the breaker when we plugged it in.
Third one is in route. Don't know what it will do.
- Was this review helpful? Yes (1) No (1)
- Flag as Inappropriate
- Was this review helpful? Yes (1) No (1)
- Flag as Inappropriate
Rated 5 out of 5
Easy purchase quick delivery great experience
Very nice. Great tool. Quality is definitely there..really helps your confidence in buying the products u offer
- Was this review helpful? Yes (1) No (2)
- Flag as Inappropriate
- Was this review helpful? Yes (1) No (2)
- Flag as Inappropriate
Reviews for Similar Products