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Mobile Fidelity StudioPhono™

Phono preamplifier for moving magnet and moving coil cartridges

Item # 406STPHONO

This beautiful phono stage lets you adjust impedance, capacitance, and gain to perfectly match your favorite cartridge.

This beautiful phono stage lets you adjust impedance, capacitance, and gain to perfectly match your favorite cartridge.

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Item # 406STPHONO

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$299.99

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About the Mobile Fidelity StudioPhono™

An adjustable preamp for analog audiophiles

To enjoy vinyl, you need your phono preamp to cleanly boost and equalize the signal coming from your turntable's tonearm. This beautiful phono stage from Mobile Fidelity lets you adjust input impedance, capacitance, and gain to perfectly match just about any moving magnet or moving coil turntable cartridge you prefer. That means you're in control, so you can get maximum warmth and detail out of every record you own.
The Mobile Fidelity StudioPhono lets you customize your preamp settings to match your specific turntable cartridge.

The Mobile Fidelity StudioPhono lets you customize your preamp settings to match your specific turntable cartridge.

An adjustable preamp for analog audiophiles

To enjoy vinyl, you need your phono preamp to cleanly boost and equalize the signal coming from your turntable's tonearm. This beautiful phono stage from Mobile Fidelity lets you adjust input impedance, capacitance, and gain to perfectly match just about any moving magnet or moving coil turntable cartridge you prefer. That means you're in control, so you can get maximum warmth and detail out of every record you own.

The Mobile Fidelity StudioPhono features a "mono" button to maximize your enjoyment of vintage records and monaural reissues. The "subsonic" button suppresses noise below 20 Hz for cleaner sound. 

Make the most of any turntable rig

If you use your StudioPhono with Mobile Fidelity's excellent StudioDeck turntable, you can use the preamp straight out of the box with no tweaking required.

On the other hand, if you have, say, the Pro-Ject Debut Carbon, which comes with an Ortofon 2M Red moving magnet cartridge pre-mounted, you'll want to make a few changes to your settings. Pro-Ject recommends that you set input impedance at 47k and input gain at 40dB. You'll find 12 dip switches on the underside of the preamp that allow you to make those adjustments quickly.

Then, if you upgrade your system in the future, the StudioPhono is ready to match up with your next 'table and cartridge.

Need a cable?

This phono preamp does not come with an RCA cable to connect to your receiver or amp.

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Product highlights:

  • compatible with moving magnet and moving coil phono cartridges
  • vibration-resistant metal casing
  • match preamp settings to your cartridge to get the best possible sound
  • 12 dip switches let you configure the preamp to match your phono cartridge
  • customizable parameters:
    • variable input impedance: 75-47k ohms
    • adjustable gain: 40-66dB
  • input capacitance: 100pF (picofarads)
  • subsonic filter controls rumble below 20 Hz
  • mono button for vintage records and monaural reissues
  • stereo RCA inputs and outputs
  • THD: <.01% (MM)/<.012% (MC)
  • 3-3/4"W x 1-1/4"H x 6-5/8"D
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # StudioPhono

What's in the box:

  • Phono preamp
  • AC power adapter (attached 58" DC cord)
  • AC plug
  • Instructions

Customer reviews

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Mobile Fidelity StudioPhono™ reviews

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Mobile Fidelity StudioPhono

Crutchfield customer from Durham, NC on 7/26/2019

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I've tried several preamps for my system (Rega P3 with Nagaoka MP-150), starting with the ART DJPre II and then moving to the Schiit Mani and the Graham Slee Gram Amp 2 Communicator. For my ears, the MoFi StudioPhono sounds the most full and vibrant. I am always chasing a lower sound floor, and the MoFi does still have an audible hum on MM settings. But the floor is considerably lower than the Schiit Mani. Side by side comparison with the Communicator, the MoFi has deeper bass and clearer highs to my ears. I am thoroughly enjoying this preamp.

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1 of 1 found this helpful

Mobile Fidelity StudioPhono

Richard from Issaquah, WA on 6/2/2019

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Using it on a Pro- Ject Classic with an upgraded Hana Shibata Lo MC. Sounds fantastic. The load and gain settings are plentiful and helped me tune the car ride perfectly.

Pros: Excellent performance and value.

Cons:

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Mobile Fidelity StudioPhono

Crutchfield customer from Oak Harbor, WA on 5/24/2019

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Very nice!

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Mobile Fidelity StudioPhono

Crutchfield customer from Chicago, IL on 5/3/2019

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Bought this preamp to remedy the very flat dry sound I was getting from my Project Debut Carbon w/ Ortofon Blue 2M through the onboard phono input in my marantz 2230. Digital music sounded big and full through the receiver's aux, so i figured it must be the phono input and I was right! The MoFi preamp provides much tighter and full low end and smooths out a lot of the high end harshness i was hearing previously. The soundstage was improved and i hear a new depth and excitement with records that previously felt flat to me. It's a subtle change, but very noticeable and appreciated by me. As other reviews state, this preamp's look and sound quality far outpace its price tag. Highly recommended.

Pros: Price. Build quality. Big full sound. Looks slick.

Cons: No on/off button, but not a huge deal.

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2 of 2 found this helpful

Mobile Fidelity StudioPhono

Brian from San Diego, CA on 1/16/2019

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Ordered the Mo-Fi and it arrived three days later. Good so far. Connected everything up, cued up an LP and? Nothing but a slight buzz. Re-checked all my connections but it still was dead. Called Crutchfield and spoke with tech services. We determined it must be a bad unit. Customer service dropped another one with UPS and paid to have the old one returned. This was on a Friday. Got the new one Tuesday, hooked it up and voila! Music. So far it sounds wonderful. Much better than my pre-amp's internal phono pre-amp. Altogether satisfied with Mo-Fi products and Crutchfield's super service.

Pros: Versatile and compact. Noticeable improvement over on board pre-amp it replaced.

Cons: none

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Mobile Fidelity StudioPhono

Crutchfield customer from San Juan, PR on 12/29/2018

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Perfect, if not mandatory compliment to the Mofi Studiodeck

Pros: Adjustability

Cons: None

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Mobile Fidelity StudioPhono

Crutchfield customer from Branford, CT on 11/18/2018

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The adjustable gain settings and the mono button are extremely convenient features. Fantastic sound, well manufactured, and far exceeded my expectations for the price point. If you buy it, you won't be disappointed.

Pros: Mono button

Cons:

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2 of 2 found this helpful

Buy one; you'll love it.

John V from Shaker Hts, OH on 10/9/2018

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This phono stage did wonders for my low output MM cartridge. Adjustable gain settings make it versatile. The Mono button is a nice touch, and very welcome for listening to old vinyl. Great product; greater value.

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This review was done by my husband he is the owner of the mo-fi phonop

Jls from San Juan, PR on 9/3/2018

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Excelent phono pre tone,presence,detail,musicality,resolution,body,excelent soundstage all that you need from an expensive unit in a less expensive one. And very compatible with my at 33 evo cartrige.FANTASTIC??

Pros: All

Cons: Nothing

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1 of 1 found this helpful

Excellent phono stage

James from Melbourne, FL on 8/10/2018

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This thing sounds great. I bought it to replace an integrated phono stage in my Emo XSP-1 preamp, and this definitely sounds better. It's got a very open natural sound with really good bass and clean extended treble. Running Ortofon 2m black on Technics SL-1200GR. The subsonic filter is really nice too, especially for warped discs. The build quality is very good as well. I see no need to ever upgrade from this.

Pros: Sounds great Relatively small Well built Nice features

Cons: None

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2 of 2 found this helpful

Excellent phono preamp

Michael from Ellisville, MS on 7/23/2018

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The MoFi StudioPhono is an excellent phono preamp. It blew away the built in phono stage in my preamp. Soundstage is very spacious and 3 dimensional. Imaging is also great and natural sounding. Bass is deep and tight. It just sounds great out of the box! Not much tweaking if you have a moving magnet cartridge, but dip switches on the bottom provide adjustments for any cartridge including moving coil. Definitely worth the price. Also made in USA .

Pros: Great sound and excellent build quality for the price.

Cons: None

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1 of 1 found this helpful

Best value in a phono pre-amp

Daniel from Tulsa, OK on 7/12/2018

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I've tried several different phono pre-amps in this price range and this unit far exceeds the value, look, and performance of all of them. You won't be disappointed.

Pros: -Attractive unit -Very well made -Detailed and very musical -Low background noise -Mono button is great feature

Cons: none

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Very impressed.

Nick from Trumbull, CT on 7/8/2018

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Big improvement compared to my receivers phono preamp. Best bang for the buck phono preamp around, especially because of the numerous cartridge loading and gain options it's gives you.

Pros:

Cons: None

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0 of 0 found this helpful

great deal.

PAUL from Philadelphia, PA on 7/2/2018

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Replaced a Grade PH1 with this, no regrets.a great simple product

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Mobile Fidelity Studio Phono

Crutchfield customer from Southfield, MI on 1/2/2018

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I purchased this to replace another phono stage that was giving me RFI issues. I like the sound of this phono stage a lot. Bass reproduction is good and the treble doesn't sound overly rolled off like some stages. Midrange is well done also, and the subsonic filter and mono button are useful. One glaring issue with this unit is that it was not stress tested with higher output MM/MI cartridges. If your cartridge has more than 4 to 5MV of output and you play some hotly cut records you will notice a graininess in the sound which seems to be one of the gain stages inside the StudioPhono becoming overloaded on the lowest gain setting (40 dB). Many phono stage manufacturers are guilty of not adequately stress testing their gear in this regard, but I expected more from a prestigious brand like this getting into the hardware game. It's something that should be tested for, since it is common for carts to have higher output than the manufacturer's spec. For example, the popular Ortofon 2M series are nominally spec'd with 5.5MV of output but can sometimes test with over 8MV of output. Carts like Goldring's 1000 and 2000 series (6.5MV) are also going to be a problem with this unit. Overall, it should've been tested more extensively before coming to market to avoid this problem. A more generous overload margin or a lower gain setting (35dB or so) would have mitigated these issues. As a result I can't recommend this 100%. If there was a way to have my unit modified for a lower gain setting without voiding the warranty I would consider it.

Pros: Subsonic Filter Mono Switch Adjustable Gain MM and MC compatible Pleasing Sound

Cons: Not enough resistive loading options. No capacitance loading options.

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4 of 5 found this helpful

Mobile Fidelity StudioPhono

ramon from Paterson, NJ on 10/24/2017

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Excellent phono pre amp, better than Cambridge audio

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9 of 11 found this helpful

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More details on the Mobile Fidelity StudioPhono™

Stacey B.

Product Research

Features

Phono Preamp (MM/MC): The MoFi StudioPhono is a phono preamp that has been engineered to work with a wide array of Moving Magnet (MM) and Moving Coil (MC) phono cartridges. The StudioPhono is factory set to operate with most high-output moving magnet (MM) and  moving coil (MC) phono cartridges. If you are using a low-output moving coil (MC) cartridge, you will need to adjust the phono preamplifier's settings for best results.

Adjustable Gain & Loading: With selectable gain and loading, you will be able to tailor the MoFi StudioPhono to match nearly any moving-magnet (MM) or moving-coil (MC) cartridge on the market. A readily accessible bank of toggle switches can be found on the unit's underside to quickly make adjustments without the need for any tools.

  • Gain: selectable gain of 40dB, 46dB, 60dB, and 66dB for MM or MC
  • Load Impedance: adjustable load impedance of 75, 100, 500, 1k, 10k, or 47k ohms for MM, MM is fixed at 47k ohms

Mono & Subsonic Filters: Two selectable toggle buttons on the top of the unit can engage a Mono or Subsonic filter mode. The Mono mode will improve image stability and generate a richer tone for mono-recorded vinyl. The Subsonic filter controls low frequencies below 20Hz preventing ultra low rumble.

Stereo RCA Input & Output: The MoFi StudioPhono is outfitted with a gold-plated stereo RCA input and output. The input connects to your turntable's output, while the output connects to an analog input on your AV receiver, stereo receiver, or integrated amplifier.

External Power Supply: The included external power supply will need to be plugged into an AC wall outlet, surge protector, or power conditioner.

Placement: The StudioPhono will operate at its best when properly installed in a location that's free from magnetic fields like those generated by equipment with power transformers (such as an amplifier), and within a reasonable distance between your turntable and audio component(s).

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Customer Q&A

Q
Crutchfield asked: Why did you buy this?
A
Curious to see if this enhances the sound from my turntable versus the built in pre-amp on my Yamaha RX-A870. [ Peter  Sep 28, 2018 ]
A
Recommendation from adviser, and the fact that it has the subsonic filter. [ Alexander  Dec 12, 2017 ]
A
Sparse reviews, but what I have seen so far very favorable so taking a shot on this one. [ Wayne  Sep 30, 2017 ]

1 question already asked

Q
Could I use a Ortofon Club Concorde Mk II Turntable Cartridge and Stylus with this pre-amp or do I need to use a different stylus?
[ Ryan  Jul 07, 2019 ]
2 answers
A
Yes. Reason I chose MoFi phono pre is that it has a variety of GAIN and IMPEDANCE loading choices via dip switches easily accessible on the bottom. This will allow me (and you) to set properly for your current Ortofon cartridge, as well as how anyone might upgrade in the future. When my current moving magnet cartridge needs replacing, I'm considering moving up to a moving coil type, which the MoFi phono pre can accommodate.
[ Glen  Jul 18, 2019 ]
A
Yes, that cartridge presents no problems. You have ample gain settings range for a good match to the 6mV output of the Ortofon. For DJ use, you will likely want to engage the subsonic filter. This phono preamp sounds far better than its price suggests. It coexists in my Hi-Fi systems with phono preamps costing $2-4K without losing credibility.
[ Phil  Jul 18, 2019 ]

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Mobile Fidelity UltraPhono™
Headphone amplifier and phono preamplifier for moving magnet and moving coil cartridges
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Add a high-quality headphone amplifier

The Mobile Fidelity UltraPhono™ offers these features:
  • built-in high performance class A headphone amplifier
  • 1.5 watts per channel
  • 31-step volume control
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