Little Dot I+ Hybrid Tube Transistor Amp Amplifier!

The Little Dot I+ Hybrid Tube/Transistor Headphone Amplifier

The new Little Dot I+ is a hybrid transistor-vacuum tube headphone amplifier, which combines the smooth, musical sound of tubes with the high output current of transistors.  The vacuum tube stage is run in Class-A, the MC33078 operational amplifier (socketed) provides voltage amplification, and BD139/BD140 transistors serve as output buffers.  The Little Dot I+ is perfect for driving low impedance headphones that require gobs of current to perform to their full potential.  With two gain settings and DIP switches for vacuum tube rolling, the Little Dot I+ offers versatility and incredible sound quality in a tiny footprint!

The Little Dot I+ includes the following tube-rolling options (as well as their equivalents):

6JI, WE403A/B, GE5654, M8100, CV4010, EF95

EF92, CV131

WE408A

Little Dot I+ Technical Specifications:

• Input: Gold-Plated Unbalanced Phono (RCA) Jacks
• Output: 1/4" Gold-Plated Stereo Headphone out
• Tube Options:
• 6JI - standard
• Replace standard tubes with EF92 - additional $20 USD
• Replace standard tubes with WE408A - additional $50 USD
• Frequency Response: 10HZ - 50KHz (-3 dB)
• THD+N:
• 0.2%: 1Vrms @ 1000Hz
• 0.6%: 3Vrms @ 1000Hz
• 1.0%: 5Vrms @ 1000Hz
• Signal-to-Noise: 92dB
• Suitable Headphone Impedance: 8 - 600 ohms
• Input Impedance: 50K ohms
• Power Output:
• 150mW @ 300 ohms
• 300mW @ 120 ohms
• 800mW @ 32 ohms
• User variable gain settings: 6.5x or 3.25x
• Power Consumption: 15VA
• Measurements:
• Metric: 180mm (L) by 97mm (W) by 100mm (H)
• English: 7.08 inches (L) by 3.81 inches (W) by 3.93 inches (H)
• Weight: 1.5 kg or 3.3 lbs.
• Available in Black
• Available in either 120VAC or 220VAC

Power Cord Note: Little Dot amplifiers ships with a standard Type-B power cord (American 3-pin or U-ground) suitable for use in areas such as North America, Japan, Taiwan, etc. If your country's outlets use other power cord types (ex. Schuko) you will need to provide you own power cord. You likely have several spares around your home, as any standard power cord (like your computer's power cord) will work perfectly fine. We do apologize for any inconvenience!

Purchasing Instructions: 

At the time of purchase, please indicate the following information in your EBAY checkout notes section, PayPal payment notes section, or in a separate email/EBAY message:

• A contact telephone number for shipping purposes.  Global EMS requires the recipient's telephone number for international deliveries.
• The voltage specs of the country in which you reside (generally 120VAC or 220VAC)

Please monitor your PayPal email address for all correspondence, updates, and tracking information regarding your Little Dot order!

International Buyers – Please Note:

• Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer’s responsibility.
• Please check with your country’s customs office to determine what these additional costs will be prior to bidding/buying.

Warranty and Support:

Are you intrigued by our Little Dot amplifiers but worry about the process if, Heaven forbid, something were to go wrong?  Rest assured, our Little Dot products are backed by arguably the best, and most customer-friendly warranty policy in the business for your peace of mind!  Please do note however that our warranty and support only applies to Little Dot amplifiers sold through direct sales (i.e. this eBay listing) or our Authorized resellers.  We cannot provide any warranty or support for Little Dots acquired through unauthorized or gray market sellers (i.e. other sellers).

•  If on the chance a functional problem arises within the first 3 months (we've found that if issues occur, the vast majority crop up within the first month or two) of your warranty period and you send it back to us for repair, we will reimburse you the full return shipping amount once we receive it so there is absolutely no out-of-pocket cost to you!

•     From 3 months until the end of your warranty period, if a functional problem arises we will reimburse you for half of the return shipping cost once we receive it.

•     From warranty expiration to as long as you own your Little Dot, repair/labor/parts are always free - the only thing you are responsible for is shipping costs.

•     Vacuum tubes are not covered under warranty as they are a consumable item, however if there are functional issues with a tube, we can provide a free replacement(s) for just the cost of shipping.

As you can see, we stand behind our products and are fully committed to providing the best ownership experience we can provide.  Again, our warranty only applies to Little Dots sold through direct or authorized resellers as otherwise we cannot guarantee the initial quality and A-stock, new status of Little Dots sold through unauthorized or gray market sellers. 

For more information on Little Dot amplifiers, please visit our forum at: 

Little Dot Official Forum

Note: Please note that the photos shown are with the WE408A tubes.  The default tubes for the Little Dot I+ are the 6JI tubes.  Photos are for illustrative purposes only.  Please refer to the product description for the most explicit and up-to-date specifications, components, parts, tubes, accessories, etc.