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Resident Audio T4 4-Channel Thunderbolt Audio Interface 24-Bit 96-kHz (B-STOCK)

Resident Audio T4 4-Channel Thunderbolt Audio Interface 24-Bit 96-kHz (B-STOCK)

Condition: B-Stock


Out of stock



  • Input | 4 x Combo XLR mic / balanced ¼" TRS, line / instrument level
  • Output | 4 x balanced ¼” TRS line-level
  •  1 x stereo ¼" headphone output
  •  (optional second headphone output via Output 3)
  • MIDI |  Input / Output
  • Thunderbolt port |  1 (bus-powered)


  • Trim | 4 (1 per channel) with 0 to +35 dBu mic gain range
  • LED clip indicator |  5 (1 per channel and 1 for Input Mix)
  • Line / Instrument switch |  2 (Inputs 1 & 2 / 3 & 4)
  • Phantom Power |  On/Off +48V (global for all channels)
  • Input Mix |  Blends live input signal with computer output signal 
  • Big Knob | Controls headphone level and monitoring level (Stereo Mix mode only)



  • Connector | XLR Female
  • Input Impedance | 1.5k Ohm
  • Dynamic Range | > 92dB
  • Gain Range | +15dB ~ +60dB (45dB range)
  • Maximum Input at Minimum Gain | -1dBu
  • Equivalent Input Noise | -124dBu (Gain +60dB @150 ohm termination)
  • Total Harmonic Distortion + Noise | > 0.009% (@1kHz, -1dBFS)


  • Connector | TRS 1/4” Phone
  • Input Impedance | 9.2k Ohm
  • Dynamic Range | > 95dB
  • Gain Range | +0dB ~ +45dB
  • Maximum Input at Minimum Gain | +15dBu
  • Total Harmonic Distortion + Noise | > 0.008%


  • Connector | TS 1/4” Phone
  • Input Impedance | 1000k Ohm
  • Dynamic Range | > 91dB
  • Gain Range | +0dB ~ +45dB
  • Maximum Input at Minimum Gain | +15dBu
  • Total Harmonic Distortion + Noise | > 0.01%


  • Bit resolution | 24-bit
  • Sampling rates | 44.1, 48, 88.2, 96 kHz
  • Mac®- and Windows®-compatibility | Recommend Mac OS X 10.9 Mavericks or higher, Windows 8 or higher
  • Supports | ASIO, Core Audio, Windows Audio Session API (Windows 8)


  • Preamps |  2 per channel, mic / instrument
  • Chassis |  Aluminum/Acrylic 
  • A/D/A converters | More than 100dB dynamic range
  • Smart Monitoring | Stereo or Mono, selected by Line/Instrument switch
  • Stereo Mix mode | All inputs and outputs to Outputs 1 & 2 plus Output 3
  • Multichannel mode | 4 individual output channels  
  • Dimensions | 10.6 x 4.4 x 1.8 in.
  • Weight | 2.3 lbs

Manufacturer's Description

The world's first bus-powered four-channel Thunderbolt™ interface

The Resident Audio T4 is the first ever four-channel Thunderbolt™ audio interface which requires no external power—a breakthrough in the worlds of live performance and recording. It adds four channels of I/O to Thunderbolt-equipped Mac and Windows computers*, with support for high-resolution 24-bit/96kHz audio and near-zero latency for virtually instantaneous recording and playback.

The lightweight and portable T4 comes with all required software drivers and a ton of innovative features such as an auto-detecting Multichannel Output Mode and Smart Monitoring, which automatically switches between stereo and mono depending upon input configuration. Four combo XLR / ¼" input jacks allow you to plug in microphones, instruments and line-level devices— with phantom power for all inputs—and there are four balanced TRS outputs for connection to speakers and external mixers. MIDI connectors enable the T4 to be used as an ultra-stable MIDI interface, and there are even dual headphone outputs. Tilted tactile gain controls with three-color wraparound LEDs allow you to quickly set optimal levels, even in low-light onstage environments. 

Whether you’re in the studio, on the stage or in the DJ booth, the T4 provides the perfect interface between your computer and your performance.

Innovative Design

The T4 offers a number of features that make recording and live performance easy. These include a "Big Knob" master volume control; an Input Mix control for blending live signal with computer playback; Smart Monitoring, which allows you to easily switch between stereo and mono monitoring; and two different modes of operation: Stereo Mix mode, optimized for the studio, and Multichannel mode, perfect for live performance.

Great Sound

The T4 allows you to record and play back audio with awesome sound quality. Unlike USB devices (which can only carry a maximum of 2.5 watts of bus power), Thunderbolt allows for a full 10 watts of power to be carried over the same wire as the audio signal. This allows us to use higher quality components in the T4, such as custom designed analog preamps (the T4 has eight of them—two for each channel) and high-power A/D/A converters.

Everything Included

Setting up the T4 is fast and easy. It comes with everything you need: a Thunderbolt cable, a QuickStart guide, and a USB card preloaded with all required software and user manual. Simply plug it in, install the drivers, and you're good to go.

The T4's drivers have been programmed by some of the best engineers in the industry. They're specifically designed to ensure stable performance and minimal CPU overhead, allowing your computer to focus on tasks like effects processing and real-time graphic display. 

Built with both the studio and the road in mind, the T4 is mounted in a sturdy aluminum/acrylic chassis that can stand up to the wear and tear of an artist on the go. And because it doesn't need a power cable, it can easily be integrated into any live performance rig.

Inputs and Outputs

The T4 provides four combo XLR / ¼" inputs, switchable between Mic, Line or Instrument level, complete with phantom power. In addition, there's a dedicated stereo headphone output and four ¼" TRS balanced outputs, one of which can be used as a secondary stereo headphone output. Last but not least, MIDI in/out connectors allow you to use the T4 as a MIDI interface with an ultra-stable clock that keeps all your sequencers and drum machines perfectly locked to audio playback.

In live performance, the T4 effectively turns your computer into an instrument with multiple outputs—great for electronic musicians and DJs. In the studio, you can selectively route audio to different mixer channels and outboard signal processors to create complex effects.


Each T4 channel has a dedicated input gain knob and a three-color wraparound LED signal indicator, allowing you to easily set optimal levels even in low-light onstage environments. In addition, an Input Mix control (with its own three-color wraparound LED) enables you to set the perfect blend of input signal with the output signal coming from your computer, and a Big Knob volume control sets the level of connected headphones as well as the overall monitoring level.*

Each pair of T4 channels also has a dedicated INST/LINE switch. This is used to set the inputs to instrument-level or line-level and also determines the  Smart Monitoring setting.

Operating Modes

The T4 operates in one of two different modes, depending upon output configuration. 

Multichannel Mode

When a connection is made to Output jack 4, the T4 operates in Multichannel mode, with four discrete monophonic output signals from your computer routed to the corresponding four Output jacks. In Multichannel mode, live input signal is sent to the headphone jack only.

Stereo Mix Mode

When no connection is made to Output jack 4, the T4 operates in Stereo Mix mode. In this mode, all live input signal, along with all output signal from your computer, is internally mixed to stereo and is routed to Outputs 1 and 2. In Stereo Mix mode, you can use Output 3 as a second headphone jack.

Smart Monitoring

The T4's unique Smart Monitoring feature allows you to switch between stereo and mono monitoring, depending upon input configuration. Monophonic monitoring allows you to remove one set of cans and still hear the sound of everything in one ear—great for vocalists and DJs.

Our Mission

Our team of musicians fuses the spirit of the local guitar shop with the convenience of the web by creating a reliable and worry-free buying experience.

At Music Store Live, our goal is to revolutionize the way gear is bought online. It’s not just about videos and know how; it’s about the person on the other end of the line. Whether you are in Tokyo or Toledo, we invite you to experience the reality of a living online music store and help us shape the best buying experience possible. As you'll see in the video below, we're musicians just like you. We strive to offer the best gear, the best online experience, and the best personalized service in the industry. We invite you to get to know our team, and we would love the opportunity to get to know you too!

Free Shipping - No Hassle Returns - 30 Day Trial Period

At Music Store Live, we are proud to offer free shipping on just about everything we sell. We’ve also got one of the best return policies in the business giving you a full 30 day trial period that starts when you receive your order for all new* items. It's all part of our mission to bring the guitar shop to your living room. This policy allows you to get your gear hassle-free and try it with your own rig to be sure that it truly fits with your playing style and sound. If it doesn't work the way you had hoped, we’ll provide you with return authorization information to send it back for an exchange, a refund, or in-store credit. But no matter what, we’ve got your back and we are here to help make sure you end up with the right gear for you. You’ll never be stuck with something you aren’t happy with.

Return Policy Details

What if there’s something defective with the item I purchased or it arrived with shipping damage?

We’ve got some of the best guitar techs around to test out every instrument before it leaves our shop and give everything a full setup. We’re confident your order will arrive ready to rock right out of the box. Our awesome warehouse staff put time and care into packaging your order up to make sure it all arrives to you safely. But let’s be honest, once in a blue moon stuff happens that’s out of anyone’s control. If you received an item which you believe is faulty, shows signs of shipping damage, or in any way doesn’t meet your expectations based on the description in the listing, please do not hesitate to contact one of our Gear Experts. No matter what happens, we want to make it right! (note: If you believe there to be shipping damage, please do not discard the packaging that your order came in and please make sure to contact us within 24 hours of receiving your delivery)

What if I’m not liking it or it’s just not working out for me?

Is something you purchased from us just not doing it for you? We understand and we absolutely want you to be thrilled with any gear that you buy from Music Store Live. If you're not happy with your order, you can return it to us within 30 days of delivery*. You are welcome to return it for a refund, an exchange, or in-store credit.

  • Please allow 2-4 business days from the receiving date for returns to be processed.
  • If your purchase qualified for free shipping, we may withhold our outbound shipping costs from any refunds processed as part of the return.
  • Contact MSL at or call (866) 256-5725 to begin the return process. Anything sent back to us must have an RMA number and we may refuse returns that did not receive prior authorization.
  • Return the item(s) in its original packaging and in a way that will help ensure its safe arrival back to us.
  • Just as we’re responsible for getting your order to you safely, you are responsible for returning the item(s) to Music Store Live in its original condition. Please take care with packaging it back up and preparing it for the return shipping journey. We recommend you add insurance to higher value items when sending them back.
  • All returns will go through a technical inspection and are subject to a restocking fee if the item is not returned in its original condition. Restocking fee to be determined by MSL but is not to exceed 15% under typical circumstances.
  • * B-Stock, C-Stock, E-Stock, Open Box, and Used items are subject to a 7-day trial period.

Is there anything that you guys won’t take back or that does not apply to your return policy?

We definitely want to work with you and be as flexible as we can to earn your business and to make sure you’re happy with everything you purchase from us. Unfortunately, there are some things that we simply cannot take back once it’s sold. That includes:

  • Custom orders or instruments with modifications (pickup installs, straplock installs, tuner installs, etc)
  • Software or authorization keys
  • Guitar amp tubes or cabinet speakers
  • Pickups that have been installed
  • Strings that have been installed
  • Drum heads and cymbals that show signs of use
  • Personal items (earphones, harmonicas, instrument mouthpieces, etc.)
  • Turntable cartridges
  • Styli
  • Control vinyl

When sending back a return, please make sure that the return merchandise authorization number (RMA) provided by one of our Gear Experts is clearly written on the label of your return. To help avoid any restocking fees, please don’t write anything on the packaging. Please return all of the original packaging and its contents. We must receive the item/order back in a condition that allows us to resell it in the same condition it was originally in when we sent it out. 

Your return label should look something like this:
Music Store Live
300 W. 28th St, ste 102
National City, CA 91950

(Note: Purchases made through third party marketplaces such as eBay, Reverb, or Amazon have their own policies and criteria for returns. Please ask if you have any questions regarding that process.)

Shipping Policy Details

In most cases we ship new orders out within 1 business day of receiving payment. Here are some things to note:

  • An indirect signature will be required upon delivery for all transactions over $250. If you would like to require a signature on a transaction of less than $250, please request it when you place your order.
  • Your order must ship to the billing address associated with your credit card, PayPal, or other method of payment. If you need to use a shipping address that differs from your billing address, feel free to contact a Music Store Live Gear Expert and we can help you out.
  • If you want the shipment to be held at a shipping company hub it is your responsibility to make those arrangements directly with the shipping company. If you’d like it held at a local FedEx facility, for example, please provide us with the full address of that facility before your order is shipped. This works out better than trying to re-route it once it’s in transit.
  • We do not insure packages valued under $3,000. If you would like to add insurance for delivery please request it when requesting your order. Whether you choose to or not, we will still assume all of the responsibility in getting your item to you safely.
  • Orders shipped within California will be subject to 7.25% state sales tax.

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