Drop O2 Headphone Amplifier
Drop O2 Headphone Amplifier
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30 Sold
Free shipping to USA
Product Description
In 2011, audio engineer NwAvGuy published a blog post titled “O2 Headphone Amp,” in which he outlined his philosophy on defining sound quality and detailed his ideal audiophile circuit design. Our version of NwAvGuy's famous O2 amplifier, the Objective 2 Desktop Edition features updates based on feedback from the community Read More
Baseline Perfect

In 2011, audio engineer NwAvGuy published a blog post titled “O2 Headphone Amp,” in which he outlined his philosophy on defining sound quality and detailed his ideal audiophile circuit design. Our version of NwAvGuy's famous O2 amplifier, the Objective 2 Desktop Edition features updates based on feedback from the community. It’s an ideal baseline reference amplifier, capable of powering everything from IEMs to HD 800s with linear ease. 

Note: Due to the popularity of this product, we’re having trouble keeping it in stock. Preorder now and we’ll reserve your spot in our next run, expected to ship July 31st. 

At checkout, choose the 120V or 240V adapter, as well as standard gain (2.5x low, 6.5x high) or medium gain (1.0x low, 3.3x high).

Community-Driven Design

The O2 was made for benchmark performance at an entry-level price, something the audiophile world had never seen before. But while NwAvGuy was satisfied with purist input, output, and power arrangements, the Drop community wanted more options. Following the initial launch of the Objective O2, the discussion lit up with more than 500 requests for changes to the input, output, and power configuration. Members asked for a quarter-inch headphone output, RCA inputs, and a rear-mounted power jack, and we were happy to oblige. Thus, the Desktop Edition was born.

Standard Gain vs. Medium Gain

We recommend the medium gain version if you plan to primarily use this amp with IEMs. If you don't plan to use IEMs, if your headphone has a 300-ohm or higher impedance, or if your source is weak (less than 2V output), opt for the standard gain version to ensure enough power.

Specs
  • Input: RCA 
  • Output: 6.35 mm 
  • Power: Battery (not included) or AC adapter (included, select 120V or 240V)
  • Gain: 2.5x and 6.5x / 1.0x and 3.3x (select your configuration)
  • Volume potentiometer taper: Alps 15A or 3B
  • Frequency response: +/-0.1 dB (20 Hz–20 kHz)
  • THD at 1 kHz, 150 ohms: 0.0016%
  • IMD CCIF at 15 ohms: 0.001%
  • IMD SMPTE: 0.002%
  • Noise (ref 400 mV): -105 dB
  • Max output (33 ohms): 613 mW
  • Max output (150 ohms): 355 mW
  • Max output (600 ohms): 88 mW
  • Output impedance: 0.54 ohms
  • Crosstalk (15 ohms): -65 dB
  • Channel balance (50% volume): 0.6 dB
  • Case dimensions: 4.12 x 3.87 x 1.12 in (10.46 x 9.82 x 2.85 cm)
  • Weight: 9 oz (255 g)
Included
  • 120V or 240V AC adapter (add plug adapter for your country’s outlet)
Shipping

Domestic (contiguous US) customers will have a choice of shipping options at checkout. The shipping days / arrive by date displayed represent the transit times from the estimated ship date for your order to be delivered.

Estimated ship date is July 31, 2020 PT.

Payment will be collected at checkout. After this product run ends, orders will be submitted to the vendor up front, making all orders final. Check the discussion for updates on your order.

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