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SM Pro Audio Q-AMP Enhanced 4-Channel Headphone Amp

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Product 620993
Product Price $0.00
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The 4-Channel SM Pro Audio Q-AMP Enhanced Headphone Amp delivers high-quality audio in a stylish, small-footprint unit. Upgraded to include SM Pro Au...Click To Read More About This Product

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Four independent stereo headphone amps in a half 1RU package.

The 4-Channel SM Pro Audio Q-AMP Enhanced Headphone Amp delivers high-quality audio in a stylish, small-footprint unit. Upgraded to include SM Pro Audio's E-Series circuit design improvements, the Q-AMP demonstrates how SM Pro Audio's compact Value series of audio products has received a major revision in terms of appearance and performance.

E-Series circuit design, component selection, and manufacturing offer an additional level of quality to the already successful HP4V.

The headphone amp is housed in a stylish extruded aluminum external chassis that can be rackmounted using SM Pro Audio's RM-1 single unit rackmount adaptor. A single Q-AMP can be mounted in the center of the rack, or 2 Q-AMPs can fit side by side. SM Pro Audio includes robust connectors for all of the Q-AMP headphone amp's inputs and outputs.

  • Four independent, high-power stereo amplifiers in half-1RU package
  • High-quality audio even at extremely high volume levels
  • Two independent stereo input sections
  • 1/4" (6.5mm) and 1/8" (3.5mm) stereo headphone outputs per channel
  • Output level control for each channel
  • Independent selection of input for each output
  • High-quality components and rugged construction

Why pay more for a headphone amp when you don't have to? Order today!

Audio Inputs:
  • Connectors: 1/4" jack
  • Type: unbalanced
  • Impedance: 47k Ohms
  • Peak input level: +25dB
  • Gain control range: 40dB
Headphone Power Amplifier Outputs:
  • 1/4" and 1/8" stereo outputs
  • Max. output level 300mW@32 Ohms (max 1W@32 Ohms)
  • Output impedance 22 Ohms
  • Max. gain +20dB
Dist, Freq, S/N Ratio & Crosstalk:
  • Frequency response: 20Hz20kHz, 0dB-2dB
  • Distortion: 0.02%
  • S/N Ratio: better than 80dB
  • Crosstalk rejection: >72dB@1kHz;-20dBinput
Power Supply:
  • Mains voltages: USA/Canada 120V AC, 60Hz
  • General export model: 100-120V AC, 200-240 V AC, 50-60Hz
  • Power consumption: 6.5VA
  • Fuse: 100-120 V AC: 630 mA (slow-blow)
  • 200-240 V AC: 315 mA (slow-blow)
  • Mains connection: Using External Power Supply 16Vac
  • Physical Dimension (HxWxD): 1 3/4" (44.5mm) , 19" (482.6mm), 8 1/2" (217mm)
  • Net weight: approx. 3.15 kg

Review Snapshot

by PowerReviews
SM Pro AudioQ-AMP Enhanced 4-Channel Headphone Amp

(based on 3 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



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  • 2 Stars



  • 1 Stars



Reviewed by 3 customers

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(1 of 1 customers found this review helpful)



By James ODell

from California

Comments about SM Pro Audio Q-AMP Enhanced 4-Channel Headphone Amp:

I bought this because it was a little cheaper than the Prosonus. They(2) were purchased September, 2010. I have had trouble with them ever since. The headphone jacks would not fit into the plugs correctly, I had to switch channels. The list could go on. In July, both of them gave out within a week of each other. I could understand one going out, but both within a week of each other?

(1 of 1 customers found this review helpful)



Comments about SM Pro Audio Q-AMP Enhanced 4-Channel Headphone Amp:

Once again ... just junk.
This headphone amp failed in two days. One channel went out and then another a few days later. I called SM Pro Audio, the manufacturer, and have never had such a terrible experience. That's what I get for trying to save a few dollars. It's nothing but an ashtray. Get something else guys.
You can tell the board mount input jacks are just junk.
It has no value ... it doesn't work.


Pleasently surprised...

By T.M.M.

from L.A., CA

See all my reviews

Comments about SM Pro Audio Q-AMP Enhanced 4-Channel Headphone Amp:

So I finally did it, I bought a heaphone amp. After years of using splitters I decided it was time. I went with this one because my primary concern was dependability. No offense to the other brands, but they just have that look, like they're saying to me "you better buy a good warranty!" Now that I have this unit, I can confidently say its built like a tank. The build quality from the potentiometers, knobs, to the box itself are all top notch. There is a LOT of smooth resistance in the knobs, not flimsy, very accurate... I wish my interface had knobs/pots this nice. If you've dealt with this stuff you know exactly what I'm talking about. A loose and flimsy knob/pot can really make or break a piece of gear. I was a little slow to jump on the bandwagon, but I'm now a big SMpro fan. Especially for utility stuff like this. Bottom line, this needs a review. Its a good unit, buy with confidence. Very good quality components. The functionality is practically the same as the cheaper versions of it, but youre buying a unit that will last you years instead of months. I would also assume these components translate into a quieter signal. I gave the features a 4.0 because I'd like to see the option of having both A and B switched on any one channel at the same time. But I can make due. Final note, this thing looks a lot nicer in person than from this picture.

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See All SM Pro Audio Headphone Amplifiers/Mixers
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