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expired Posted by TattyBear | Staff • Aug 1, 2023
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expired Posted by TattyBear | Staff • Aug 1, 2023

Monolith by Monoprice Liquid Spark Headphone Amplifier by Alex Cavalli

+ Free Shipping

$55

$130

57% off
Monoprice
22 Comments 11,167 Views
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Deal Details
Monoprice has Monolith by Monoprice Liquid Spark Headphone Amplifier by Alex Cavalli (33304) on sale for $54.59 when you apply code BIG30. Shipping is free.

Thanks to Deal Hunter TattyBear for finding this deal.

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 SlickDealio | Staff
  • About this deal:
    • This price is $75.40 lower (58% savings) than the list price.
    • Rated 4.7 out of 5 stars from 73 reviews.
    • Refer to the forum thread for community discussion of this deal.

Original Post

Written by TattyBear | Staff
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Monoprice has Monolith by Monoprice Liquid Spark Headphone Amplifier by Alex Cavalli (33304) on sale for $54.59 when you apply code BIG30. Shipping is free.

Thanks to Deal Hunter TattyBear for finding this deal.

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 SlickDealio | Staff
  • About this deal:
    • This price is $75.40 lower (58% savings) than the list price.
    • Rated 4.7 out of 5 stars from 73 reviews.
    • Refer to the forum thread for community discussion of this deal.

Original Post

Written by TattyBear | Staff

Community Voting

Deal Score
+25
Good Deal
Visit Monoprice

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 7/6/2025, 07:18 PM
Sold By Sale Price
Amazon$129.99
Monoprice.com$129.99

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21 Comments

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Aug 1, 2023
29 Posts
Joined Oct 2015
Aug 1, 2023
CGRemakes1
Aug 1, 2023
29 Posts
I have a Qudelix 5K with Hifiman 400se with a balanced cable. Does it make sense at this price to get this to use for desktop and use the Qudelix as a DAC? Any advantage?
Aug 1, 2023
2 Posts
Joined Oct 2017
Aug 1, 2023
lewdawg01
Aug 1, 2023
2 Posts

Our community has rated this post as helpful. If you agree, why not thank lewdawg01

Quote from CGRemakes1 :
I have a Qudelix 5K with Hifiman 400se with a balanced cable. Does it make sense at this price to get this to use for desktop and use the Qudelix as a DAC? Any advantage?
I think you would see a significant improvement with the 400se. They need power to show what they are capable of. I have them connected to my class A amp and they sound very good. The Qudelix outputs ~280mW (I think) vs 1.3W with this. The only downside would be not running in a balanced configuration but I think the power gains would still outweigh that, it all depends on your budget I guess.
Last edited by lewdawg01 August 1, 2023 at 04:49 PM.
1
Aug 2, 2023
54 Posts
Joined May 2023
Aug 2, 2023
SeattleStreaker
Aug 2, 2023
54 Posts
IMO this is a no-brainer at this price. I picked it up for about $70 a few months ago and I've been happy with it. It's sitting on my desk in front of me right now. Some of the reviews said the thing got hot, but that has not been my experience. I don't think there's anything else out there of this quality, at anywhere near this price.
Aug 2, 2023
1,904 Posts
Joined Dec 2004
Aug 2, 2023
awdawg
Aug 2, 2023
1,904 Posts
I picked up one of these around this price from a target deal a while back. It powers my HD6xx nicely, I also have the schiit stack, and I'd say that the schiit stack puts out more power as the HD6xx's get louder from what I can recall. That said, at $55 if you want or need a headphone amp, grab this!
1
Aug 2, 2023
1,730 Posts
Joined Dec 2013
Aug 2, 2023
JeffJ9000
Aug 2, 2023
1,730 Posts
Using this as a preamp for powered speakers. At this price there's zero to complain about. If you need a preamp/switcher/volume control with a bonus headphone amp, this is a no brainer.
Pro
Deal Editor
Aug 2, 2023
48,164 Posts
Joined Sep 2004
Aug 2, 2023
SlickDealio
Aug 2, 2023
Pro
Deal Editor
48,164 Posts
Add a 6-Ft 8K HDMI [monoprice.com] for $0.99 to your order.
Aug 2, 2023
458 Posts
Joined Jul 2008
Aug 2, 2023
Anticon
Aug 2, 2023
458 Posts
Would this be worth getting to plug into a laptop 1/4" output? My daily work setup is I have some Philips SHP9500 with a vmoda mic attached. I assume the mic isnt getting back through this. I have a feeling the answer is no, but I still really want it.

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Aug 2, 2023
53 Posts
Joined Mar 2018
Aug 2, 2023
IndigoHorn7692
Aug 2, 2023
53 Posts
Who is really "by"? Monoprice or Alex?
Aug 2, 2023
2,292 Posts
Joined Dec 2008
Aug 2, 2023
revoc
Aug 2, 2023
2,292 Posts
These bulky standalone amps are old fashioned.
4
Aug 2, 2023
2,397 Posts
Joined Jul 2017
Aug 2, 2023
fintlewoodlewix
Aug 2, 2023
2,397 Posts
Quote from IndigoHorn7692 :
Who is really "by"? Monoprice or Alex?
Alex designed it for Mono, I believe.

This is a more-than-acceptable headphone amp for a good price. It's not exactly state of the art and it won't drive the piggiest headphones to earsplitting volumes, but it's plenty for all else.
Aug 2, 2023
53 Posts
Joined Mar 2018
Aug 2, 2023
IndigoHorn7692
Aug 2, 2023
53 Posts
Should go well with my PC by Corsair by Nvidia By AMD by Asus by G Skill by Realtek by LG by Cable Matters by cooler master by noctua by Logitech by duracell
2
Aug 2, 2023
886 Posts
Joined Nov 2010
Aug 2, 2023
Rookz
Aug 2, 2023
886 Posts
Sorry for a potentially silly question, but can I plug a turntable into this?
Aug 2, 2023
103 Posts
Joined Jul 2017
Aug 2, 2023
Slurm93
Aug 2, 2023
103 Posts
Quote from Rookz :
Sorry for a potentially silly question, but can I plug a turntable into this?
I'm by no means an expert but i do not believe so, Not directly ( unless it has a built in phono preamp at least ). You would need a phono pre-amp and go from that to this amp.
Aug 3, 2023
95 Posts
Joined Dec 2018
Aug 3, 2023
woodenhorse
Aug 3, 2023
95 Posts
I had hyperx cloud revolver, can i plug in to this ?

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Aug 3, 2023
1,113 Posts
Joined Jun 2006
Aug 3, 2023
howdydo
Aug 3, 2023
1,113 Posts
Quote from JeffJ9000 :
Using this as a preamp for powered speakers.
What does that do?

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