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expiredbabgaly | Staff posted Mar 3, 2023 10:36 PM

Monolith by Monoprice Liquid Spark Headphone Amplifier by Alex Cavalli

$68

$130

47% off
+ Free Shippingat Monoprice
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Deal Details
Various Retailers have Monolith by Monoprice Liquid Spark Headphone Amplifier by Alex Cavalli (133304) on sale for $67.99. Shipping is free.

Thanks to Deal Hunter babgaly for sharing this deal.

Available from: Specs:
  • Dimensions: 4.6" x 3.7" x 1.5" (117 x 94 x 38 mm)
  • Weight: 9.6 oz. (271g)
  • Headphone Output: Unbalanced stereo 1/4" TRS jack
  • Preamp Output: Unbalanced stereo RCA jacks
  • Signal-to-Noise Ratio: 108dB (ref. 1 Vrms input / 2 Vrms output @ 1kHz)
  • Crosstalk: –73dB (ref. 1 Vrms input / 2 Vrms output @ 10kHz)
  • Output Impedance: < 0.1 ohms
  • Gain: +3dB or +6dB
  • Input: Unbalanced stereo RCA
  • Output Protection: Delay and offset protection

Editor's Notes

Written by SubZero5 | Staff
  • About this deal:
    • This price is $12 lower than the previous FP deal.
  • About this product:
    • 1 year warranty
  • About this store:
    • Information about Monoprice's return policy here.
    • Sign-up for Target RedCard to save an additional 5%, receive free shipping, and attain an extended return period.

Original Post

Written by babgaly | Staff
Product Info
Community Notes
About the Poster
Deal Details
Product Info
Community Notes
About the Poster
Various Retailers have Monolith by Monoprice Liquid Spark Headphone Amplifier by Alex Cavalli (133304) on sale for $67.99. Shipping is free.

Thanks to Deal Hunter babgaly for sharing this deal.

Available from: Specs:
  • Dimensions: 4.6" x 3.7" x 1.5" (117 x 94 x 38 mm)
  • Weight: 9.6 oz. (271g)
  • Headphone Output: Unbalanced stereo 1/4" TRS jack
  • Preamp Output: Unbalanced stereo RCA jacks
  • Signal-to-Noise Ratio: 108dB (ref. 1 Vrms input / 2 Vrms output @ 1kHz)
  • Crosstalk: –73dB (ref. 1 Vrms input / 2 Vrms output @ 10kHz)
  • Output Impedance: < 0.1 ohms
  • Gain: +3dB or +6dB
  • Input: Unbalanced stereo RCA
  • Output Protection: Delay and offset protection

Editor's Notes

Written by SubZero5 | Staff
  • About this deal:
    • This price is $12 lower than the previous FP deal.
  • About this product:
    • 1 year warranty
  • About this store:
    • Information about Monoprice's return policy here.
    • Sign-up for Target RedCard to save an additional 5%, receive free shipping, and attain an extended return period.

Original Post

Written by babgaly | Staff

Community Voting

Deal Score
+39
Good Deal
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Price Intelligence

Model: Monolith by Monoprice Liquid Spark Headphone Amplifier by Alex Cavalli

Deal History 

Sale Price
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Current Prices

Sort: Lowest to Highest | Last Updated 8/3/2026, 03:56 AM
Sold By Sale Price
Amazon$131
NewEgg$131.99

Top Comments

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63 Comments

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Mar 4, 2023 10:03 PM
238 Comments
Joined Apr 2009
socrpro192Mar 4, 2023 10:03 PM
238 Comments
What do people use this for?
Mar 4, 2023 10:29 PM
4.5K Comments
Joined Jan 2011
motaku96Mar 4, 2023 10:29 PM
4.5K Comments
So this doesn't come with a cable to plug into your computer right? You'd have to get an RCA to 3.5mm like this? https://www.monoprice.com/product?p_id=5597
Mar 4, 2023 10:29 PM
435 Comments
Joined Mar 2010
TrentWalkerMar 4, 2023 10:29 PM
435 Comments
Quote from socrpro192 :
What do people use this for?
To drive headphones.

It's similar to an amplifier you would use to drive speakers, except it's for headphones.

Typically meant to be placed on a desktop so you can plug your headphones into them to control the volume while using a PC or Mac.
Mar 4, 2023 10:35 PM
435 Comments
Joined Mar 2010
TrentWalkerMar 4, 2023 10:35 PM
435 Comments
Quote from Adelley :
Can you hook up your speakers to this?
If you have powered speakers, yes.

This can be used as a pre-amp into a pair of powered speakers so you would use this to control the volume.
Mar 4, 2023 10:42 PM
2.4K Comments
Joined Dec 2008

This comment has been rated as unhelpful by Slickdeals users.

Mar 4, 2023 10:55 PM
50 Comments
Joined Mar 2015
brecourtMar 4, 2023 10:55 PM
50 Comments
In for one, my budget amp has been showing signs of going bad after owning it for like 20 years. Time for another.
Mar 4, 2023 11:04 PM
506 Comments
Joined Nov 2007
RonnieTheBearMar 4, 2023 11:04 PM
506 Comments
Quote from cstrac :
Wireless headphones don't need amps. Would probably also need to use them wired which defeats the purpose of the headphones in the first place.
I do often use them wired, yes

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Mar 4, 2023 11:08 PM
355 Comments
Joined Sep 2010
preferredmikeMar 4, 2023 11:08 PM
355 Comments
Quote from socrpro192 :
What do people use this for?
For this amp, anything with RCA L & R outputs.

This starts you down the rabbit hole of HiFi. People start here and start dumping money into better sound. I went with an iFi unit and can run from my phone or other sources to good quality headphones. For some there is a huge difference in sound. Hifiman has some decent planar magnetic headphones for relatively inexpensive prices. (from as low as $109 up to $6K). You do need an amp to power something like those. You can squeeze by without, but you are missing out on the potential of the headphones.
Mar 4, 2023 11:16 PM
7.8K Comments
Joined Jan 2009
make_moneysMar 4, 2023 11:16 PM
7.8K Comments
Quote from AmusedRain294 :
Wondering if you might specify the newer designs at this price point that you found outpace this model?
It's gonna be tough finding a better one at this specific price point but a few models from topping and Fiio are at around the $100 price point (or maybe less if bought on sale)
Mar 5, 2023 1:26 AM
583 Comments
Joined Mar 2009
W0rmyMar 5, 2023 1:26 AM
583 Comments
I have a 10 year old fiio e11 Kilimanjaro I pair with some hd598's. Would I benefit from switching to this amp?
Mar 5, 2023 1:34 AM
153 Comments
Joined Apr 2013
LiangW7480Mar 5, 2023 1:34 AM
153 Comments

Our community has rated this post as helpful. If you agree, why not thank LiangW7480

Take another $5 OFF with coupon 5MORE on monoprice.com.
3
Mar 5, 2023 4:51 AM
1.2K Comments
Joined Sep 2010
supermanrocksMar 5, 2023 4:51 AM
1.2K Comments
so...for GAMING...this still ok? I think my Fosi Audio DAC-Q4 is starting to go bad...getting static out of my Philips X2HR Fidelio
Mar 5, 2023 5:03 AM
2.1K Comments
Joined Oct 2009
minnusMar 5, 2023 5:03 AM
2.1K Comments
Quote from supermanrocks :
so...for GAMING...this still ok? I think my Fosi Audio DAC-Q4 is starting to go bad...getting static out of my Philips X2HR Fidelio
For gaming, an amp is fairly trivial - it just needs to provide enough power to power your headphones. Your Philips X2HR don't really need a dedicated amp, so any amp will be good.

Your Fosi DAC is a combo unit - it's both a USB DAC and an amp - whereas this Monoprice unit is just an amp. If only the amp portion of your Fosi DAC is going bad, you can connect the Fosi DAC to this amp. This way, your Fosi does the DAC while this unit does the amping. If something else is wrong though, it won't fix anything.
Mar 5, 2023 5:27 AM
829 Comments
Joined Jul 2022
LivelyManatee460Mar 5, 2023 5:27 AM
829 Comments
Quote from RonnieTheBear :
Is something like this worth owning if the nicest headphones I own are Sony wh‑1000xm3's? Or would I not hear much of a difference because those cans are powered already?
Ironically nicer bluetooth headphones like the Xm3 use something called DSP, and if you plug it into an amp it will be louder yes, but you lose the DSP tuning that you get using the active bluetooth mode making it actually sound worse in wired. Some wired bluetooth headphones that are well made like the Focal Bathys for instance dont have as much of a variation between the Bluetooth DSP and analog 3.5mm connection.

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Mar 5, 2023 5:27 AM
1.2K Comments
Joined Sep 2010
supermanrocksMar 5, 2023 5:27 AM
1.2K Comments
Quote from minnus :
For gaming, an amp is fairly trivial - it just needs to provide enough power to power your headphones. Your Philips X2HR don't really need a dedicated amp, so any amp will be good.

Your Fosi DAC is a combo unit - it's both a USB DAC and an amp - whereas this Monoprice unit is just an amp. If only the amp portion of your Fosi DAC is going bad, you can connect the Fosi DAC to this amp. This way, your Fosi does the DAC while this unit does the amping. If something else is wrong though, it won't fix anything.
ok, I'll probally just keep a eye out for a DAC/AMP since I don't know what is exactly going out on this...I mean it might be something wrong with the headphones, time will tell I guess. tyvm for your input!

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