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Home / Product Category / AMPLIFIER / Stereo Amplifiers / XMP100 2x Channel 75W Each Channel, Class D Stereo Amplifier, Priority Input and A/B Switching 4 -8Ω

XMP100 2x Channel 75W Each Channel, Class D Stereo Amplifier, Priority Input and A/B Switching 4 -8Ω

Product code: XMP100

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Features & Specifications

The XMP100 is the digital Class D version of our popular AMP 120 amplifier. This amp will also power Dolby Surround Sound systems and enhance the power of OSD outdoor speakers. Automatic source switching enables users to connect more than one source to the amp, so, for instance, you could use it to power both a DVD player and an iPod. The XMP100 has the ability to automatically switch sources, as well, if you choose to go from listening to music on your iPod to watching a flick on a DVD player. The power amplifier has 75 watts RMS per channel and bridgeable outputs for 160 watts RMS. An input of 1.4 volts is needed to reach full output and the signal to noise ratio is 107dB (A-weighted). The Dual Source 2-Channel Stereo Amplifier OSD-AMP120 has front panel-mounted volume and balance knobs and comes with a two-year warranty.

Connecting Your Smartphone/ Portable Music Device is Easy!
A great feature of the XMP100 is the ability to connect your smartphone, iPod, or other portable music device. The XMP100 includes two RCA signal level inputs marked as red for right and white for left. All you need to do is purchase our inexpensive RCA to mini cable (see RCA audio cables under the audio/video cables tab). The mini 3.5 connector is plugged into the headphone output of your device then the RCAs are connected to one of the inputs of the XMP100. It’s that easy!



  View Owner's Manual          


30 Questions & 31 Answers
from Atlanta asked:
August 31, 2019
can you use this amp with an OSD Audio Pre1 Preamp?

1 Answer
Hi Charlie:

 Yes, the preamp-1 will work with the XMP100. It adds 1.5 signal gain to the XMP100, adds four inputs including Phono Preamp for MM Moving Magnetic Cartridge, 2 Aux, and a CD/DVD. It also offers adjustable Bass, Mid, Treble, and Loudness controls. Plus Mic mixer with a dedicated volume knob. Other features include Tape Monitor Loop for adding an Equalizer. A Mono, Low Pass Filter, Mute switch complete the choices. So if any of the features appeal to you, there is no problem adding the Preamp-1 to the XMP100 or XMP300.


Submitted by: Tim Leahy on September 2, 2019

from Vancouver, Canada asked:
August 4, 2019
I just purchased a Marantz SR7013 and will use all 9 amplified channels to power my 5.2.4 HT system (Polk S60s, S30, S15s, HTS12s, and MC80s).  I also have two pairs (4 speakers) Polk Atrium5's for the patio that have been home run to the location of the Marantz and another 2 pairs of Polk MC60's for other parts of the house that were home run to a closet elsewhere .  I ran a CAT5e between the closet and the Marantz. I plan to connect an XMP100 to Zone 2 on the receiver to power the outdoor speakers in 4ohms (press A/B down simultaneously) and another XMP100 to Zone 3 through an audio balun set.  Will this work? Is the XMP100 the right amp for my needs? When is gen 2 coming out? And lastly, do you also sell the baluns? Thanks!
2 Answers
Hi Darren:

The XMP100 is an excellent amplifier but not sure how much of a match to your MARANTZ AVR. A better compliment for your outdoor patio speakers is our OSD AMP200 a true High Current Audiophile Power Amplifier. It features a class A/B design with a High Power Toroidal all-discrete internal components and no IC's in the audio path. It is 2-ohm stable and performs best at 4-ohm (the A and B speaker switches are meant to depress together at the same time). On the Zone 3 connection, I would recommend adding our NERO Streamer XD Integrated Power Amplifier. It features a 16-24 bit 192kHz internal DAC (It includes a free OSD Player App).


Submitted by: Tim Leahy on August 19, 2019
Hi Darren:

I would suggest some on the level of the Marantz Receiver for your POLK Atrium 5s. Something like our High Current Power Amplifier the OSD AMP200 that is stable down to a 2-ohm load (and front panel individual A and B speaker switches are meant to be depressed together). The XMP100 or are NERO Streamer XD would be the optimum integrated Power Amplifier connected to your Zone 3 or standing on its own.

Good luck


Submitted by: Tim Leahy on August 19, 2019

from New York asked:
June 5, 2019
Can I parallel bridge zone A to two 8 ohm speakers and simultaneously run zone B with an un-bridged pair of 8 ohm speakers utilizing this amplifier? Or does that cause a drop below 4 ohms?
1 Answer
Hi Peter:

You can only wire for one Bridged connection at a time either Speaker A or Speaker B. Note; a bridged output is a mono two-conductor connection that has to be 8 ohms. So it could not be connected to a pair of 8-ohm speakers unless wired in series (16 ohms, but that defeats the purpose of bridging the output in the first place, more power). You can connect one pair to Speaker A and a second pair to speaker B and play both at the same time, or you can bite the bullet and upgrade to the XMP300 and get a lot more power. If your speakers are different/unmatched, you could add external volume controls to one or both pair of speakers. Let me no more about your system if you need additional clarification. My contact email is


Submitted by: Tim Leahy on June 8, 2019

from Parkland, FL asked:
April 29, 2019
How do i get both pairs of speakers working? I have a pair of in ceilings in master, and a pair of in ceilings in master bath. Both terminate in same location. I have the amp, but when I press speaker A on front panel, speaker B turns off. And vice versa. How do i get both A and B both pushed in so I can drive both sets? Also, the speakers were installed 4 years ago...I'm not entirely certain if they are 8 ohm only....what will happen if both driven by this amp?
1 Answer
HI Keith: The XMP100 is the step up design to the OSD AMP120. The XMP100 is rated at 4-ohms so that it can drive two pair of 8-ohm speakers at the same time. To limit the OSD120 (8-ohm stable) to a single pair of speakers, we purposely designed the AB switch so that you could only press one button at the same time with the opposite button popping out. Most affordable custom home speakers rated at 8 ohms. You can confirm with the manufacturer. If you are comfortable that both speakers are 8-ohm, you will be able to push both buttons in at the same time on the XMP100. You will have to fiddle with the buttons to get them to both come out. But they will both play at the same time. The XMP100 is a class D amplifier with a Power Supply is 93% efficient (versus 50% for class A/B) so runs cooler. TL/5521
Submitted by: Tim Leahy on April 30, 2019

from Madison, Wisconsin asked:
April 3, 2019
Will this amplifier work with two passive subwoofers?
1 Answer
Hi Jefferey: The XMP100 is a full Range digital Amplifier. It would not be your best choice for driving a couple of 8-ohm Passive Subwoofers. Check out our SAM300 a Black Series Dedicated Subwoofer. It is rated at 4 to 8 ohms and will operate two 8 -ohm subs with no problem. It also has a key feature where you can select a specific low frequency (selectable between 25Hz and 50Hz). You have variable 0 to 12 dB boost at the point chosen. You will find this amp at our premium site under Black Series Amplifiers. If you are interested, we will quote you a price: TL/5488
Submitted by: Tim Leahy on April 10, 2019

from Japan asked:
January 29, 2019
Hi, Would it be possible to drive in bridged mode 4x 8 ohms speakers connected in parallel. Each speaker would be connected to a SVC205 (In-Wall Impedance Matching Volume Control) where the switch would be set to 4x. According to my calculation, the resulting impedance seen by the amp would be 8 ohms. Is that OK ? Other small question, is it OK to connect only 1 speaker to the SVC205 (meaning that nothing connected to one of the channel). I believe yes but just want to be sure.
1 Answer
Hi Vince: In Theory, everything you have laid out should work. Questions, Are you using the SVC-205 volume control to control only the Impedance? Are you connecting a right and left full range signal to the XMP100 before you bridge it to mono? Typically if you are bridging these amps, you are planning to play one for right and a second for the left channel. I am not sure if the stereo signal is combined. You might have to combine signals before they get to the XMP100 like using out Pre-One which has a stereo-mono switch. You can wire four individual 8-ohm speakers in series-parallel, so it shows an 8-ohm load. Note the Impedance settings on the SVC-205 1/2X, 4X and 8X refer to the number of 8-ohm connections. Maybe you can tell me more about your system and what you are trying to accomplish. TL/5391
Submitted by: Tim Leahy on February 4, 2019

Paul John Marquez
from Seattle, Washington asked:
January 10, 2019
Hello, I have a Denon AVR-X2400H receiver (ATMOS) with Polk Audio Signature Series Speakers Front L/R-S20; Center-S35; Surround Back L/R-S15; Height Speakers L/R - S10. Will OSD XMP100 improve the sound quality if I'll be listening to music and watch movies in ATMOS mode. Or do you have any suggestions on how to improve or enhance the sound quality. Thanks, Paul John Marquez
1 Answer
Hi Paul: You are limited, on what you can do with your existing setup. You have selected reputable speakers, and the DENON is a good choice featuring 95 watts per channel. Your limitation is there are no preamp outputs on your seven channels; Front Stage Speakers, Surrounds Speakers, and heights (effects speakers). You did not mention if you had one or two subwoofers. If you have only utilized a single Powered Subwoofer, you should consider adding a second sub for your system. Another trick when adding a second subwoofer is to tie it in line with your center channel. Placement for this Subwoofer would be in the front of the room. The main Powered Subwoofer connected to the Subwoofer output would be located, in the back of the room. We do have a wireless solution for broadcasting a signal to the rear of the room. You need two ac plugs, one for the Powered Sub and the second for the power supply for Wireless Receiver. You also have a Preamp zone 2 if you wanted to play a pair of speakers in an adjoining room where the XMP100 would work for you. Good luck, TL/5367
Submitted by: Tim Leahy on January 14, 2019

Jacob Russell
from Portland, TN asked:
November 28, 2018
Is it possible to connect a powered subwoofer to this amp? If so, how would I accomplish that?
1 Answer
Hi Jacob: It depends what Powered Subwoofer you want to power. If you are connecting via RCA signal (low) level, you will connect to the Main preamp output of the XMP100. Note: it is a straight pass-through for the Mainline input. It will not work with anything connected to the Interrupt Labeled inputs. The second option depends if your Powered Subwoofer has Speaker (high) Level. If so you would hook up to the Speaker B; Right and Left (+/-) outputs. The Powered Subwoofer will play with whatever is connected for both sets of inputs either Interrupt inputs or Main inputs. Good luck TL/5308
Submitted by: Tim Leahy on December 3, 2018

from Los Angeles, CA asked:
November 20, 2018
I just purchased the xmp100 amplifier and I am very happy with the product. I plan to purchase the same unit because I want to try the bridge option. I want to play the right channel on one amp and the left channel on the other amp. Both amps are to be in bridged mode. Is this configuration possible? If it is , what kind of cables are needed to connect the pre-amp to the 2 bridged xmp100s?
1 Answer
Hi: I believe you can add the second XMP100 and bridge both of them, one for the left channel and one for the right channel. You will need to use two each of the single RCA cable similar to our AURUM Sub Cable. You connect one cable from your left channel output to the left channel main input on the first XMP100. Then connect the second cable from the right channel output to the right main input. You want to connect to the Main inputs of the XMP100 (versus the interrupt). You will connect a two conductor speaker cable to the Speaker A Right and Left Positive (the right positive to the positive of the two conductor cable, the Left positive to the negative conductor of the speaker cable). Note: the speaker that you are bridging to must be an 8-ohm load. Anything less than 8-ohm would be a problem. Good luck TL/5293
Submitted by: Tim Leahy on November 25, 2018

from MA asked:
August 5, 2018
Can I run a+b with channel a bridged and channel b running two 8 ohm speakers? The manual says one set of speaker outputs can be bridged at a time, but not if you can then use the other output...
1 Answer
HI Ed: Good question. But the XMP100 just like our AMP200 and AMP300 are limited to bridged connection off Speaker A with no other connection to Speaker B. When Bridged it also becomes critical that it is an 8-ohm connection. That is the same whether it be a $99.00 Amp or $350.00 like our AMP300. TL/5146
Submitted by: Tim Leahy on August 7, 2018

from Louisiana asked:
July 20, 2018
I am looking at adding this amp between my Samsung TV to power up my AP640 speakers I purchased from you previously. Will it work and what will it take?
1 Answer
HI RMR: You will need to make sure you have a variable audio output connection from either your TV (check the owners manual) or your cable or satellite box. You may need to turn your internal TV speakers off as well. The XMP100 would be a great match for your AP640 Patio speakers. You will need an RCA stereo patch cord to connect from either the TV or the set-top box. You will connect to the main inputs of the XMP100. Another option would be our NERO Integrated Power Amplifier which features an internal Bluetooth Receiver. Plus a choice of connections between the TV and the NERO. There is a Digital Optical option so you would be making a direct digital connection (the best option). Good luck TL/5120
Submitted by: Tim Leahy on July 23, 2018

from Grapevine, tx asked:
June 30, 2018
Could I install this outside under a covered patio? It would get hot and cold with weather, but stay dry. I have power out here, but no speaker wire run. So wondering if I can just mount this next to speakers with a chromecast audio for the source.
1 Answer
Hi Chris: I believe that would work, you will need two power outlets, one for the XMP100 and a second for the Chromecast Audio. You will also need a 3.5mm to RCA adapter cable to plug the 3.5mm to the Chromecast Audio and then the two RCA connectors into the Right and Left Mains input of the XMP100. You have a nice outdoor season in that part of Texas (not as much humidity as Houston South). You might plan to bring inside for the short offseason. I mean you had Snow for the Super Bowl so your Winter can get a little crazy. TL/5086
Submitted by: Tim Leahy on July 2, 2018

from Waltham, MA asked:
June 27, 2018
I use the xmp100 to power two OSD rock speakers in my back yard. I'm having the same problem as Bryan from Merrimack, NH has when using a sonos connect as input to my xmp100 amp and using the auto-on/off feature. I'm thinking I might want to set up a manual 12-volt switch I can use from my patio to power the amp on and off. Do you have a product that meets this need? If not, can you point me to somewhere I can find one?
1 Answer
Hi David: This is the review from Bryan in NH. He says the auto-on works: Just what I needed I'm running this XMP100 with a Sonos Connect powering a set of AP525 speakers on my front porch. I'm very happy with the sound -- nice and crisp. The auto-on feature works (yay!). I always like to use a dedicated amp instead of a Connect: AMP. I'm glad OSD offers an auto-on amp for around $100. I have a Class A/B amp that drives my pool area speakers and I can't tell a difference in the sound quality compared to this Class D. Did you make sure the amp switch on the front was in the on position? It needs to be on for both options either Normal or Auto-On. It also takes 5 to 15 minutes to go into standby. This amp also can run two pairs of speakers (A/B) something the SONOS Connect AMP does not recommend. Let us know if that helps. TL/5081
Submitted by: Tim Leahy on June 28, 2018

from SC asked:
April 24, 2018
I would like to use one of these amps in bridged mode to feed a Niles SSVC-6 speaker switch which has 6 pairs (12 speakers) of ceiling mounted speakers already installed. Since the Niles switch should present an 8 ohm load to the XMP100, would I be able to safely bridge both channels and then feed the two bridged speaker outputs into the left and right speaker inputs of the Niles switch?
1 Answer
Hi Rotorports: Sounds like a good plan but in theory the bridged output wants to see a minimum 8 ohm load. That typically is ok as long as you are powering a single pair of stereo speakers and want to have an amp driving each speaker. Not recommended for a passive speaker selector with 6 pair of speakers where the impedance would not be as stable. A better choice would be our AMP200 a true High Current Amplifier that is 2 ohm stable. A true audiophile amplifier that is our top selling whole house audio amplifier ideal for your application. TL/4930
Submitted by: Tim Leahy on April 25, 2018

from ND asked:
March 21, 2018
Is is amp rack mountable and does this come with rack mounts?
1 Answer
Hi Nick: The XMP100 is Rack Mountable and the actual rack mounts are included in the box. TL/4854
Submitted by: Tim Leahy on March 31, 2018

from Nashville, TN asked:
October 4, 2017
Do you suggest using OVC 300 Outdoor Volume Control for A and B set of speakers? I have a pool area and a pavilion area and would love to have the RX640 150W Rock Speakers by the pool. I will have AP490 4" Outdoor Patio Speakers Pair at the pavilion. I want to be able to have the 2 areas on 2 separate volume controls.
1 Answer
Hi Candida: You can easily connect an OVC300 to speaker A zone 1 (RX 640) then an OVC300 to Speaker B, zone 2 (AP 490). Set the impedance switch to both the OVC300 to 1/2X. Notice: when you push in Speaker A button Speaker B pops out and the same when you press B in, A pops out. You can push both in at the same time and both will play. Good luck TL/4575
Submitted by: Customer Service - Q&A on October 5, 2017

from VA asked:
September 1, 2017
Looking for a receiver to run two sets of speaker pairs for a large screened porch (about 19' x 40'). I was thinking of this receiver and two pairs of the ICE600WRS speakers. The two inputs on the receiver would be a TV and a bluetooth transmitter. Any issues with those pairings?
1 Answer
HI Jon: The XMP100 will handle your basic setup but would suggest the following. First upgrade your ICE600WRS to ICE800WRS. These will be connected to speaker A and B. Then connect the Bluetooth to input labeled Interruption and the TV cable or satellite box to the Main input. The Bluetooth will take priority while it is active. Phase 2 would involve adding a second XMP100 and adding a pair of patio speakers placing a speaker on either side of the TV (check out the AP650). The two sources would still be connected to the first XMP100 with an RCA cable connected to the Main output of the first XMP100 to main input of the second XMP100. The second XMP100 would drive the two patio speakers. You would have the option of playing the pair of patio speakers or all three pair for the TV where the Bluetooth would play just for the two pair of ceiling speakers. It will be much more effective having the speakers firing out from around the TV. The Bluetooth speakers would take priority over the TV input but the TV would still be playing through the second XMP100. The main output only plays whatever is connected to the Main input.. Good Luck TL/4544
Submitted by: Customer Service - Q&A on September 20, 2017

from Phoenix, AZ asked:
August 3, 2017
I'm looking to power zone 2 on my home audio system, which includes 4 of your OSD outdoor speakers. Would you recommend this unit to power the speakers?
1 Answer
Hi Efrian: The XMP100 has Speaker A and Speaker B. The switches work just like our AMP120 where when pushing in speaker button A, speaker B pops out. WE did this on purpose with the AMP120 to discourage playing both A and B at the same time. The XMP100 is a Class D amplifier that is double the efficiency of the AMP120. So even thought the speaker selector switches work the same you can press both switches in simultaneously and both will play. It will work for you application. You can also add a volume control for each pair of speakers for more local control. Good choice, good luck TL/4505
Submitted by: Customer Service - Q&A on August 4, 2017

Chris C
from Pennsylvania asked:
July 8, 2017
I need to replace a Bose lifestyle 20 system that died. We have Bose outdoor speakers and bookshelf indoor speakers. Is this a good replacement system?
1 Answer
Hi Chris: The XMP100 should work fine for both your outdoor speakers as well as your bookshelf speakers. My concern was if the BOSE speakers which are part of the System 20 use a speaker wire with a proprietary connector. I looked up the outdoor and bookshelf to confirm the bare wire connection. I also believe this will be a more affordable solution for you. The next step would have been the AMP200. TL/4460
Submitted by: Customer Service - Q&A on July 13, 2017

from Chandler, AZ asked:
April 14, 2017
Can you show what bridged wiring looks like for the OS SUB200 with OS525 Sat setup off the back of this amp?
1 Answer
Hi Mike: The XMP 100 would not work in the bridged mode unless you used 2 of them. I would recommend either purchasing a single XMP 100 and trying it with the SUB200 and the pair of Satellite speakers the OS 525. I think you will be pleasantly surprised how much output you get. If not you will have a choice to either purchase a second XMP 100 and bridge both (the positives of Speaker A as marked) one for right input and the second for left making sure to have the right and left only inputs to each respective amp. Or you could return the XMP 100 for an AMP200 (run in stereo). Last option would be to buy the AMP200 from the start. TL/4307
Submitted by: Customer Service - Q&A on April 19, 2017

from TN asked:
January 20, 2017
Does it come with ears for rack mounting?
1 Answer
Hi Drew: Yes it does come with rack mount ears. We will make sure to add that bullet point on the XMP-100 page. Thanks for the heads up. TL/
Submitted by: Customer Service - Q&A on January 31, 2017

from San Antonio, TX asked:
September 2, 2018
Will this amp work for two, polk atrium 8 speakers ?
1 Answer
Hi Jerry: The Polk Audio Atrium 8SDI speakers are a Single Stereo Speaker with Dual Voice Coils (dual Input) plus a unique Dual application switch. You have two options with these speakers. First, you set the dual application function switch to Dual Input Stereo Switch and connect both inputs, one left and the other the right speaker input. That would mean connecting two of these speakers in parallel which would drop the impedance down to 4 ohms. The XMP100 rated at 75 watts at 4 ohms, 50 watts at 8 ohms. That is what the amplifier would see if you connect just one of the inputs for each of the two speakers and set the Dual application switch to single Mono left or right. You would be combining these two speakers as a stereo pair with double the tweeter output per speaker. The XMP100 would see an 8-ohm load from this connection. So no problem playing two of the Atrium 8 with the XMP100 since you would connect to Speaker A; Right and Left output only. When combining two of these speakers as a single stereo speaker, you will be using both Speaker A, left and right output and also speaker B left and right outputs as well for the second speaker. These would create a 4-ohm load on the amplifier and have 75 watts per channel. You would need to press both Speaker A and Speaker B switches at the same time. The XMP100 will handle either of these applications/connections. God luck TL/5191
Submitted by: Tim Leahy on September 5, 2018

from Michigan asked:
December 29, 2017
Can I add this amp to an Onkyo TX-SR313?
1 Answer
HI: The Onkyo Amplifier has no Zone 2 or any other pre amp output. What are you trying to accomplish; TL/4719
Submitted by: Customer Service - Q&A on December 31, 2017

from Corrales, New Mexico asked:
September 14, 2017
The manual says to connect left and right inputs in bridged mode. I am only running one side into each amp so can I plug one wire into either side and get enough input voltage for full power or do I need to use a splitter to plug into both sides?
1 Answer
Hi Drew: It sounds like you are connecting a single mono connection. The splitter would work the best on input side (main input R&L). The only limitation on the Bridged output is it needs to be connected to an 8 ohm load. So I am assume you are connecting to a single speaker with a positive and negative input. Maybe if you can tell me your whole setup including Brand and model number. TL/4564
Submitted by: Customer Service - Q&A on September 21, 2017

from Merrimack, New Hampshire asked:
August 9, 2017
Auto-on does not seem to be working on my unit. I have a Sonos CONNECT connected to the MAIN input of the amp, confirmed the auto on mode is set to AUTO, and even after several days of not using the Connect, my amp's power light remains green. There is no change in power button light color when I start playing music. I really don't want an amp on full-time when it only gets a few hours of use a week. Is this a flaw in the unit or user error?
1 Answer
HI Brian: I am sorry the unit is not performing as advertised. I was going to suggest maybe the front switch was not in the on position but the green light is on and you have the switch on the back set to Auto On. Typically the way the Auto On sensing works. Once the signal is no longer present it take 10 to 15 minuted before it huts off. But comes on instantly once the signal comes back on. I would suggest trying another source like your phone connected with a 3.5mm to RCA adaptor cable and see if still does not shut off. If still no then contact our RMA department and ask about replacing the unit but make sure they test the replacement unit first . TL/4512
Submitted by: Customer Service - Q&A on August 12, 2017

from GA asked:
July 27, 2017
Can this be bridged and drive a 4ohm load? I don't see that option specified in the manual. If not, is there another OSD product that can do it? Ideally up to 250W.
1 Answer
Hi Gary: I do not believe this amplifier will run a bridged signal into a 4 ohm load. I do not believe our High Current amplifiers will do that either. An 8 ohm load is what the bridged mode is rated for AMP200 and AMP300 a true High Current Amplifiers. TL/4491
Submitted by: Customer Service - Q&A on July 27, 2017

from North Dakota asked:
July 17, 2017
With the A/B selector, does this amp work to power both at the same time? Or just A (or) B? The manual on your website doesn't specify.
1 Answer
Hi Kyle: The amp has a both A and B speaker switch on the front panel. They copied the same design as our AMP120 which we tried to discourage you from playing both A and B at the same time. So when you push B in A pops out. The AMP120 is a class AB analog IC amplifier that has problems with impedance loads less than 8 ohm. Typically when you play A and B together the speaker outputs are connected in parallel so the impedance drops down to 4 ohms which is OK when played at modest volume levels. But when you crank both up the same time then current demand is accompanied by an increase in heat which needs to be dissipated. The Power Supply is only 50% efficient so it has trouble coping with the excess heat. The XMP100 has a class D audio section which runs at 93% efficiency. Much less heat to deal with so it has no problem running two pair of speakers and the 4 ohm load. Now back to the A and B switches. You can push both switches in at the same time so A and B does play at the same time. It does take a little work to pop the switches out afterwards but it will work. We hope to resolve this on gen II. TL/4475
Submitted by: Customer Service - Q&A on July 25, 2017

from San Diego asked:
June 4, 2017
Could this power both a old Bose Series IV and two osd AP840s? The audio source will be and Apple TV with small line amp. I typically run this off a 2x100w Sony 2xchannel receiver.
1 Answer
HI Garry: The XMP-100 should have no problem powering two 8 ohm pair of speakers. The pair of AP-840 are 8 ohm. The question is on the older BOSE Series IV speakers. Can you confirm these are 8 ohm. Many of the BOSE speakers were 4 ohm. This would create less than a 4 ohm load which might cause a problem when playing both speakers at once.You will also notice that when you push in one of the speaker buttons (either A or B) the other pops out. You can push both in at the same time. We created this safeguard on the original AMP-120 (a class AB amp, a design that has been around for more than 15 years) which is only 50% efficient. We discouraged playing both A and B at the same time on the AMP-120 but not the XMP-100. The XMP-100 is a Digital Amplifier that is 93% Efficient so it creates less heat allowing it to play the lower impedance longer. TL/4402
Submitted by: Customer Service - Q&A on June 5, 2017

from NH asked:
March 10, 2017
Does this amp have auto power on/off?
1 Answer
HI BP: This amp features three turn on options which include a two position switch on the back panel underneath the Stereo/Mono Bridge Switch. The Normal setting is controlled by the Manual Power Button Switch on the front panel. Push in for on, and out for off. The Auto Setting is also controlled by the Manual Power Button on the front panel as well. It needs to be pushed in order for the Auto sensing to work. As soon as the signal (music) is detected the amp turns on. It stays on for up to five minutes after the signal has stopped and goes into stand-by mode (you need to keep the power button pushed in the on position). So when the signal comes back on, the amplifier wakes up and starts playing. The third option is a 12 volt trigger. This also needs to have the Manual Power Button on the front pushed in the on position as well. And set the turn on mode switch on the back to normal. The amp will be on at first so you turn off your Receiver which would send a signal to the amp turning it off (stand by). Then when you turn the receiver back on the Amp would turn on as well instantly. We should have you covered... TL/4249
Submitted by: Customer Service - Q&A on March 20, 2017

from Apex, NC asked:
March 1, 2017
Can I drive 2 pairs (4 total) of speakers with this? Specifically your ICE800WRS speakers. I don't see the ohm rating of those speakers or the minimum ohm rating of this amp. thanks!
1 Answer
Hi Will The ICE 800 WRS are rated at 8 ohm. One of things we were looking for when testing the XMP 100 was it's ability to drive 2 pair of speakers. The fact it is a Class D digital amplifier which is 93% efficient. The biggest problem you have with an class AB amplifier like our AMP120 which by design is only 50% efficient. Both the AMP120 and AMP60 had issues driving two pair of 8 ohm speakers due to the heat that was generated by the low impedance load causing the amps to draw more current (especially with only a power supply that was 50% efficient). These amps do not have the additional internal heat sink to dissipate the heat. They do have thermisters on their circuit boards which protect the boards when the heat exceeds 90c. The more efficient Digital designed power supply does not generate the heat so they have better chance of driving both 8 ohm speakers. No problem powering both these speakers. TL/4237
Submitted by: Customer Service - Q&A on March 2, 2017

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