SPL Pro-Fi Series Phonitor x Headphone Amplifier and Preamplifier with VOLTAiR Technology (Black)
SKU: 7738669982

SPL Pro-Fi Series Phonitor x Headphone Amplifier and Preamplifier with VOLTAiR Technology (Black)

Sale price$234488.25 Regular price$260542.50
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Description

SPL Pro-Fi Series Phonitor x Headphone Amplifier and Preamplifier with VOLTAiR Technology (Black)The black Pro Fi Series Phonitor x Headphone Amplifier and Preamplifier from SPL offers connections for headphones operated both balanced and unbalanced. It has an advanced built in dual power amp that drives headphones balanced which is twice the power of the standard 1 4" jack. This tightens the bass response and makes the overall playback even more relaxed and transparent. The front houses a 4 pol XLR connector to connect the balanced headphone.

The black Pro-Fi Series Phonitor x Headphone Amplifier and Preamplifier from SPL offers connections for headphones operated both balanced and unbalanced. It has an advanced built-in dual power amp that drives headphones balanced which is twice the power of the standard 1/4" jack. This tightens the bass response and makes the overall playback even more relaxed and transparent. The front houses a 4-pol XLR connector to connect the balanced headphone. Both the standard and the 4-pol headphone outputs can be used simultaneously.

Phonitor x is not just a headphone amplifier but also a full-fledged stereo preamplifier. There is provision for connecting up to five stereo sources - two in the analog domain offering XLR connectors for a balanced source and RCA connectors for an unbalanced source.

When Phonitor x operates as a preamplifier together with the Performer as power amplifier both units can be wire-linked for simultaneous power on/off. Therefore, both units AMP CTL sockets need to be connected with a 3.5mm mono-jack cable. When switching to headphone, listening the performer can automatically be powered down. To engage this feature set DIP switch #6 on the bottom of the Phonitor x to ON. The Phonitor Matrix delivers the most realistic playback on headphones.

The VOLTAiR 120V Rail Technology is developed and manufactured to run on an operating voltage of 120V, which corresponds to twice that of discrete operational amplifiers and four-times that of semiconductor operational amplifiers. It reproduces finest details and delivers a totally relaxed sounding audio experience. The music sounds natural and hearing fatigue is reduced.

120V rail headphone amplifier and preamplifier
Separate connections and power amplifiers for headphone driven balanced and unbalanced
Suited for all headphones with impedance >10 Ohms
Balanced and unbalanced analog inputs (XLR and RCA)
Balanced and unbalanced analog outputs (XLR and RCA)
With Phonitor matrix speaker-equivalent listening on headphones
Balance control
Mono switch function
Volume remotely adjustable (sold separately)
AMP CTR connection with Performer power amplifier for coupled On/Off switching
Standby/power on switch
Linear power supply with toroidal transformer
Input XLR
Neutrik XLR, balanced, 2-pin = (+)
Impedance: ca. 20 kOhms
CMR: -82 dBu (at 1 kHz)
Maximum Input Level: 32.5 dBu

RCA
RCA, unbalanced
Impedance: ca. 10 kOhms
Maximum Input Level: 32.5 dBu
Output Balanced Headphone
Neutrik 4-pin XLR connector
Pin wiring: 1= L (+), 2= L (-), 3= R (+), 4= R (-)
Impedance: 0.36 Ohms
Damping Factor: 180 @ 40 Ohms
Frequency Range: 10 Hz to 300 kHz ( -3 dB)
Crosstalk at 1 kHz: -90 dB
THD & N: 0.00091 % (at 0 dBu, 1 kHz, 100 kOhms load)
Noise (A-weighted): -98 dBu
Dynamic Range: 130.5 dB

Unbalanced Headphone
6.35 mm TRS connector
Pin wiring: Tip = Left, Ring = Right, Sleeve = GND
Impedance: 0.18 Ohms
Attenuation Factor: 180 @ 40 Ohms
Frequency Range: 10 Hz to 300 kHz (-3 dB)
Crosstalk at 1 kHz: -90 dB
THD & N: 0.00091% (at 0 dBu, 1 kHz, 100 kOhms load)
Noise (A-weighted): -103 dB
Dynamic Range: 135.5 dB

Speaker/Line Outputs
Neutrik XLR, balanced, 2-pin = (+)
RCA, unbalanced (single-ended)
Frequency Range: 4 Hz to 300 kHz (-3 dB)
Crosstalk at 1 kHz: -106 dB
THD & N: 0.00085 % (at 0 dBu, 1 kHz, 100 kOhms load)
Noise (A-weighted): -103.8 dB
Dynamic Range: 136.3 dB
Maximum Output Power At +30 dBu @ 1 kHz
2 x 1 W at 600 Ohms impedance
2 x 2 W at 300 Ohms impedance
2 x 3.7 W at 120 Ohms impedance
2 x 2.9 W at 47 Ohms impedance
2 x 2.7 W at 32 Ohms impedance
Power Supply Main Voltage (Switchable): 115 VAC / 60 Hz or 230 VAC / 50 Hz
Fuses: 115 V: T 1 A; 230 V: T 500 mA
Power Consumption: Maximum 40 VA
Stand-by Power Consumption: 0.7 W
Dimensions (W x H x D) 11 x 3.9 x 12.9" (28 x 9.9 x 32.8 cm) with feet
Weight 9.5 lb (4.3 kg)
All product and company names are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 7738669982

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kkl
Whiting, US
★★★★★ 5
Very good product
Size: Medium, Color: (001) Black / Black / Pitch Gray
I purchased these to wear inside lowcut slip on casual shoes, I don't particularly like to not wear socks in my shoes for hygienic reasons. Prior to purchasing these socks, all I could find were those made of very light beige hosiery type material , and my slip on shoes would slide around a bit. These are light weight and breathable athletic type material, with a very good gripper strip at the heel. One pair of my slip on casual shoes have a particularly lower cut in the toe area, but the shoe is black and I chose the black color and though I see a hint of the sock there, it matches and does not detract from the look of the casual solid black shoe
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Reviewed in the United States on May 15, 2026
A
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Anna Wylda
Massapequa, US
★★★★★ 5
They stay out! No more sock wads!
Size: Medium, Color: (100) White / White / Mod Gray
Best no show socks ever made!!!!! I've been struggling for 2 years to find ones that actually stay on your foot, even other national brands, and I just became content wearing my sneakers without socks. They ALWAYS slid down into my show & I ended up walking on a wad of sock until I could fix it...or usually just took them off after a couple of tries. Enter Under Armor!!! They a mid weight, but not very thick & still breathable. They work too by actually staying on your foot! Not once have they slid down into my show!! Very comfortable but they could be a little more affordable.
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Reviewed in the United States on August 1, 2025
R
Verified Purchase
Rebekah
Port Orchard, US
★★★★★ 5
Love!
Size: Large, Color: (100) White / White / Mod Gray
Ive tried so many no show socks but I love these. This is the 3rd set I've bought. They never slip off and the material is thin and breathable. Perfect for working out.
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Reviewed in the United States on March 2, 2026
B
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Becky
Dallas, US
★★★★★ 5
True no-show socks that don’t slide down!
Size: Medium, Color: (100) White / White / Mod Gray, Size: Medium, Color: (100) White / White / Mod Gray
This is the first pair of no-show socks I’ve tried that actually don’t slide down into my shoes. Trust me… I have tried lots of different pairs and this is the one! They fit perfectly. They’re not too thick and they’re obviously durable because I wash them after each wear, so daily.
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Reviewed in the United States on March 21, 2026
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Raquel Hall
San Leandro, US
★★★★★ 4
Great fit but expensive
Size: Medium, Color: (252) Blush Beige / White / Castlerock
These are really great socks. I love them, but they are definitely pricey.
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Reviewed in the United States on March 30, 2026

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