Monolith by Monoprice THX AAA Balanced Headphone Amplifier featuring THX AAA 887 Technology
Product # 39359
$399.99
Qty: 1
$399.99
Qty: 2-9
$399.99
Qty: 10-19
$399.99
Qty: 20-49
$399.99
Qty: 50+
$399.99
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Questions and Answers
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Browse 38 questions
Browse 38 questions
and 27 answers
What's the dimensions and weight?
A shopper
on Sep 10, 2019
BEST ANSWER: 8.66"W x 8.15"D x 1.97"H Approx 3.5lbs
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- New User U Staff on Sep 10, 2019
BEST ANSWER: 8.66"W x 8.15"D x 1.97"H Approx 3.5lbs
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- New User U Staff on Sep 10, 2019
I put the measurements at the end of the review thread on Audio Science Review.
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- Amir M on Sep 10, 2019
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Are the full specification out yet since they are not on this page?
A shopper
on Sep 13, 2019
Thank you for your question.
There would be specs available once the item is available for sale.
There would be specs available once the item is available for sale.
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- Tyler C Staff on Sep 17, 2019
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Seeing it can output almost 4 W of power. How low impedances can it power? Will I be able to run my 8 ohm speakers from this?
A shopper
on Sep 10, 2019
BEST ANSWER: It is not designed for this purpose, which is why there aren't any binding posts to hook up speakers.
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- New User U Staff on Sep 10, 2019
BEST ANSWER: It is not designed for this purpose, which is why there aren't any binding posts to hook up speakers.
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- New User U Staff on Sep 10, 2019
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Can this be used as a pre amp with active speakers?
A shopper
on Sep 10, 2019
BEST ANSWER: Yes, you can utilize the pass through output.
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- New User U Staff on Sep 10, 2019
BEST ANSWER: Yes, you can utilize the pass through output.
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- New User U Staff on Sep 10, 2019
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Can this be used as a pre amp with active speakers?
F R
on Sep 10, 2019
BEST ANSWER: Yes, you can use the unbalanced pass through output to the active speaker.
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- New User U Staff on Sep 10, 2019
Pass Through means volume is not adjustable?
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- New User U on Nov 14, 2019
BEST ANSWER: Yes, you can use the unbalanced pass through output to the active speaker.
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- New User U Staff on Sep 10, 2019
Pass Through means volume is not adjustable?
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- New User U on Nov 14, 2019
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A simple question that I shouldn’t have to ask, what are the specs?
A shopper
on Sep 10, 2019
BEST ANSWER: Simple answer: They are now live on the site.
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- New User U Staff on Oct 24, 2019
BEST ANSWER: Simple answer: They are now live on the site.
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- New User U Staff on Oct 24, 2019
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how long is the warranty?
A shopper
on Sep 10, 2019
BEST ANSWER: Thank you for your question.
This item would have a three year warranty.
This item would have a three year warranty.
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- Tyler C Staff on Sep 10, 2019
BEST ANSWER: Thank you for your question.
This item would have a three year warranty.
This item would have a three year warranty.
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- Tyler C Staff on Sep 10, 2019
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will it have the 887 number on the front like i saw on a reviewers picture? if so i would suggest to leave it out or move it to a better place with better font similar to the thx logo font for a cleaner look
A shopper
on Sep 11, 2019
BEST ANSWER: The 887 is getting removed from the unit and it was only on a handful of early units. It will look like the images on our site.
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- New User U Staff on Sep 11, 2019
BEST ANSWER: The 887 is getting removed from the unit and it was only on a handful of early units. It will look like the images on our site.
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- New User U Staff on Sep 11, 2019
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EU availability anytime soon?
A shopper
on Sep 11, 2019
BEST ANSWER: Thank you for your question.
It would be best to sign up for our newsletter at the bottom of our site to receive updates on new items.
It would be best to sign up for our newsletter at the bottom of our site to receive updates on new items.
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- Tyler C Staff on Sep 18, 2019
BEST ANSWER: Thank you for your question.
It would be best to sign up for our newsletter at the bottom of our site to receive updates on new items.
It would be best to sign up for our newsletter at the bottom of our site to receive updates on new items.
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- Tyler C Staff on Sep 18, 2019
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What is the minimum impedance earphones that is safe to use with? I ask this because I have earphone with balanced driver that has impedance of 8 .
A shopper
on Sep 11, 2019
BEST ANSWER: 12 Ohms is the minimum impedance for full range usage.
Or if you restrict the output to < 4V pk, then the unit can tolerate 8 Ohms minimum.
Or if you restrict the output to < 4V pk, then the unit can tolerate 8 Ohms minimum.
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- Andrew M on Nov 15, 2019
BEST ANSWER: 12 Ohms is the minimum impedance for full range usage.
Or if you restrict the output to < 4V pk, then the unit can tolerate 8 Ohms minimum.
Or if you restrict the output to < 4V pk, then the unit can tolerate 8 Ohms minimum.
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- Andrew M on Nov 15, 2019
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Is the RCA pass output fixed or variable?
A shopper
on Sep 17, 2019
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What does the bypass, timed off switch on the back do?
A shopper
on Sep 18, 2019
BEST ANSWER: Switch up: After a few hours without audio, the unit will turn off to conserve power.
Switch down: The unit will not automatically turn off.
Switch down: The unit will not automatically turn off.
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- Andrew M on Nov 15, 2019
BEST ANSWER: Switch up: After a few hours without audio, the unit will turn off to conserve power.
Switch down: The unit will not automatically turn off.
Switch down: The unit will not automatically turn off.
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- Andrew M on Nov 15, 2019
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Noticibly absent from the description is the inclusion of Dirac II which the desktop 789 dac amp includes. Is this because the full specs haven't yet been published or because this model won't include this functionality?
A C
on Sep 23, 2019
BEST ANSWER: This model will not have this functionality.
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- New User U Staff on Sep 23, 2019
BEST ANSWER: This model will not have this functionality.
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- New User U Staff on Sep 23, 2019
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Hi there, are the speakers muted while using headphones? Like, when you plug in headphones speakers are muted automatically?
Milos T
on Oct 9, 2019
BEST ANSWER: This is not an amplifier for speakers.
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- New User U Staff on Oct 10, 2019
Yes, I am aware of that. I just presumed this would have pre-out so I can control the volume on my desktop speakers, most headphone amps have it.
They're asking what happens to the passthrough outputs when a headphone is plugged in. Many headphone amplifiers with passthroughs will mute the passthrough when headphones are plugged in and we want to know if this device does that.
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- New User U on Oct 19, 2019
BEST ANSWER: This is not an amplifier for speakers.
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- New User U Staff on Oct 10, 2019
Yes, I am aware of that. I just presumed this would have pre-out so I can control the volume on my desktop speakers, most headphone amps have it.
They're asking what happens to the passthrough outputs when a headphone is plugged in. Many headphone amplifiers with passthroughs will mute the passthrough when headphones are plugged in and we want to know if this device does that.
- Reply (1)
- New User U on Oct 19, 2019
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Where is this amplifier made?
Lynn K
on Oct 11, 2019
BEST ANSWER: Engineered in the USA, manufactured in China.
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- New User U Staff on Oct 11, 2019
BEST ANSWER: Engineered in the USA, manufactured in China.
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- New User U Staff on Oct 11, 2019
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Will there be DAC/amp combo unit like the THX 788 with upgraded components(like thx 877 etc...) released soon?
Taylor P
on Oct 16, 2019
BEST ANSWER: No, there will not be one in the near future.
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- New User U Staff on Oct 16, 2019
BEST ANSWER: No, there will not be one in the near future.
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- New User U Staff on Oct 16, 2019
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Some preamps have fixes volume and some variable volume. As a preamplifier to my speakers can I control the volume directly from the volume knob of the Monolith THX AAA 887?
A shopper
on Oct 22, 2019
BEST ANSWER: The pass through output is not variable, it is a fixed output and not controlled by the volume knob.
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- New User U Staff on Oct 23, 2019
BEST ANSWER: The pass through output is not variable, it is a fixed output and not controlled by the volume knob.
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- New User U Staff on Oct 23, 2019
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Does the RCA output switch off when headphones are plugged in? Our can you use both at the same time?
A shopper
on Oct 25, 2019
BEST ANSWER: Both at same time. The RCA out is just a pass-through. It is unaffected by volume knob or by headphone jacks.
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- Andrew M on Nov 15, 2019
BEST ANSWER: Both at same time. The RCA out is just a pass-through. It is unaffected by volume knob or by headphone jacks.
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- Andrew M on Nov 15, 2019
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When is Monoprice releasing a DAC for the THX AAA 887?
New User U
on Nov 1, 2019
BEST ANSWER: Two DACs will be coming ut shortly, the Liquid Spark DAC and the Liquid Platinum DAC. The Platinum DAC will go great with this piece.
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- New User U Staff on Nov 1, 2019
BEST ANSWER: Two DACs will be coming ut shortly, the Liquid Spark DAC and the Liquid Platinum DAC. The Platinum DAC will go great with this piece.
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- New User U Staff on Nov 1, 2019
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The new batch has an ETA on mid-Nov. When should people expect to receive the unit if one ordering the new batch?
A shopper
on Nov 7, 2019
BEST ANSWER: 3 or 4 days later, depends on transit time from our warehouse to you.
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- New User U Staff on Nov 7, 2019
BEST ANSWER: 3 or 4 days later, depends on transit time from our warehouse to you.
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- New User U Staff on Nov 7, 2019
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DAC AND ADC Filters. The manual gives no explanation of the DAC filters (normal, slow 1 and slow 2) or about the ADC filter options (normal or slow. Would monoproice share a small and useful explanatory blurb on these filters and their settings?
New User U
on Nov 10, 2019
BEST ANSWER: This amplifier does not have DAC filters or a DAC.
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- New User U Staff on Nov 11, 2019
BEST ANSWER: This amplifier does not have DAC filters or a DAC.
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- New User U Staff on Nov 11, 2019
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Does this work in Australia?
A shopper
on Nov 12, 2019
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Is there a European version for the ac adapter?
A shopper
on Nov 19, 2019
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Does this come with a european version for the power outlet?
A shopper
on Nov 19, 2019
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Will there be an updated version of the Monolith THX DAC/AMP (788) that will utilize this new THX technology (887) in the near future?
Christopher H
on Sep 11, 2019
Does the shipping and warranty period apply to Japan?
A shopper
on Oct 17, 2019
Do you ship to Japan? Is the warranty period maintained?
New User U
on Oct 18, 2019
Is shipping to Japan possible? Will the warranty be maintained?
New User U
on Oct 22, 2019
Is a regular plug adapter good enough to use this in Europe, or do I need a voltage stepper?
New User U
on Oct 23, 2019
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Amazing!!
Just opened and hooked up to a setup that will be evolving... DAC is the Topping D50S (Waiting for Monoprice to release there 4499 dac next month) and is single ended.. Headphones are Audio Technica cheapo's..
So far from what I can tell with this limited setup, its dead quit and powerful!! Great headphone amp to build from and have for years!
Only thing that may be a ding is the on off switch seems a bit cheap , but the volume knob seems pleasant.
Hope this helps!
So far from what I can tell with this limited setup, its dead quit and powerful!! Great headphone amp to build from and have for years!
Only thing that may be a ding is the on off switch seems a bit cheap , but the volume knob seems pleasant.
Hope this helps!
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