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Sheer Audio HA-006+ (DynaLo) is a pure class A, high performance headphone amp/pre-amp that provides excellent performance, great sound, powerful presentation, crystal clear details and all done while making the music very enjoyable.



Dr. Kevin Gilmore's renowned Dynamic Headphone Amp (AKA: DynaLo) has long been regarded as one of the very best headphone amps around, and many custom builders and amp makers had made many high end products based on this design. However, most of them costs in excess of $500USD, and some even managed to blow past $1000USD. Does it have to cost that much to own and enjoy one of the most detailed, involving and enjoyable headphone amp around?


Well, with our Sheer Audio HA-006+ it is no longer the case, because we have worked very hard to provide the essence of DynaLo without the huge price tag. All important details and the essence of DynaLo is done properly and by the book, and Dr. Gilmore himself have listened to the original version and like the result a lot. The HA-006+ improves on the original version by finer tuning of the sound, with smoother sound, better soundstage and great decay.



NEWS!!!: All HA-006+ will now be upgraded to a toroidal transformer power supply to significantly lower the noise floor, at NO EXTRA CHARGE!!!

How's Sheer Audio HA-006+ Sounds Like?:

1. Neutral Sound Signature: HA-006+ is designed to taint sound as little as possible, it sounds very transparent and introduce minimal coloration to allows the music to speak for itself.
2. Effortless Drive: Powerful paralleled Bi-Polar transistor output stage makes music sound effortless and natural with even the most demanding headphones. No longer will you have to endure wobbling bass, piercing treble, muddy mids or other effects of improperly driven headphones.
3. Open Sound Stage: Open and free sounding sound stage, music will not sound congested or overly exaggerated sound stage.
4. Precise Instrument Imaging: Revel the finer details of sound, and clearly present each instrument and where they come from.
5. Highly Detailed Sound: All the details will be presented to you in a natural fashion, and you will be hearing a lot more of the details in your music that you have been missing.
6. Lively Bass: Excellent bass extension with vast amount of detail, and of course, the proper KA-BOOM that Dr. Gilmore demands. It won't be that muddy boom that you hear with other headphone amp.
7. Listenability: With the ability to extract all the details, we still keep HA-006+ very enjoyable with non-fatiguing sound. After all, it would not be fun to listen to something that will fatigue you out quickly.

What other qualities does Sheer Audio HA-006+ have?:

1. Easy Installation: Works just like any other headphone amp or pre-amp, just plug the power, signal and your headphone on and you will be ready to rock! It also work extremely well as pre-amp for your active speaker or power amp.
2. Built-in Power: HA-006+ is equipped with a very robust and powerful internal power supply, no longer will you have to put up with a wall wart power supply.
3. Highly Refined Design: While Dr. Gilmore's design is already excellent, we have developed many revisions using different parts to make HA-006+ sound great and affordable at the same time.
4. Quality Connectors: High quality locking headphone socket and quality gold plated copper RCA connector ensure excellent connection in and out.
5. Quality Components: Using precision parts throughout the entire headphone amp, fully shielded signal wires, carefully hand matched transistors, and a purely direct-coupled setup. All done in the quest for better sound.
6. Custom High Powered Transformer: We used a transformer with specs far exceeds the requirement of the circuit, providing plenty of clean power to HA-006+.
7. Compact & Stylish: Sturdy metal chassis that looks perfectly at home whether it is on your desk or on the stereo rack.

The back of HA-006+, 1 set of analog input and 1 set of pre-out (shown with silicon rubber cover on), input voltage select switch (115V and 230V).

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Sheer Audio HA-006+ Basic Specs:

1. Hand Matched Transistors: Matched to very close tolerance for better stability and performance
2. Pure Class A Operation: Pure Class A operation, with over 100mA per channel capability, easily drives most dynamic headphones.
3. Fully DC Coupled Circuit: No signal distorting capacitor or DC servo in the signal path, allowing better and more neutral frequency extension.
4. Dual Independent Power: Two independent regulator circuits, dedicated high current +/-15V analog power for the amp circuit.
5. Pre-amp Output: High quality variable output via RCA, can be easily used to drive active speaker or power amp. Performs perfectly as a high quality pre-amp.
6. International Voltage Compatibility: Simple flick of a switch will allow you to switch between 115V (usable for countries of 100 to 125V) and 230V (usable for countries of 200 to 250V).
7. Included Accessory: Computer grade power cable, will include the proper type for customer's region.
8. Dimensions: 145mm * 270mm * 80mm (Width * Depth * Height, excluding knobs and connectors).

Neat and tight interior, circuit and component layout are all highly optimized. You can see the new toroidal transformer as well as the quality locking headphone socket.

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Can't find the model with the function that you need? Are you unsure which product will fit you need? Please refer to the following table for the feature and difference between models. (Please click on the model name for direct link to the product that you are interested in.)

ModelFunction	USB Input	SPDIF Input	Analog Input	Headphone Amp	Isolation Transformer	Note
DA-151 Mk2	YES	No	No	No	No	16bit 32/44.1/48 KHz
DA-131 Mk2	No	YES	No	No	No	Up to 24bit @ 192 KHz
DA-152	YES	No	No	Yes	No	16bit 32/44.1/48 KHz (No analog input)
HA-171	No	No	Yes	Yes	No	Pure headphone amp/pre-amp, No DAC
HA-006+	No	No	Yes	Yes	No	Pure headphone amp/pre-amp, No DAC Pure Class A
HA-006++	No	No	Yes	Yes	No	Higher performance version of HA-006+
PT-111	No	No	No	No	YES	300W Balanced Isolation Transformer
DC-115	No	No	No	No	No	Dual Independent 12V/15V DC Power Supply Pure Linear Power
DC-115 5V	No	No	No	No	No	5V DC + 12/15V DC Power Supply Pure Linear Power

Warranty:

For KECES: All KECES products carries an 1 year parts and labor warranty.

For IeGO: All IeGO products carries a 5 year parts and labor warranty.

For Acoustic-Fun: All Acoustic-Fun products carries a 3 year parts and labor warranty, please keep your original shipping box as it will contain the serial number needed for the warranty.

For Sheer-Audio: All Sheer-Audio products carries a 2 year parts and labor warranty.

For All Products: Within warranty period, we will fix or replace it as quickly as possible at our discretion(usually under 3 days). User will be responsible for shipping it to us, and we will pay for the return shipping. For products out of warranty, we will charge a minimal repair/return shipping charge and process it quickly just like we do for warranty. Warranty will be voided if the product is modified, physically damaged(including but not limited to: impact/fall, moisture/water, fire, lighting or other force of nature/acts of God), or improperly used in ways that the product is not rated for.

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