Why Choose Crutchfield?
Great gear and expert advice
Our experts help you pick the ideal gear for your needs.Meet our advisors
Free tech support for the life of your gear.Read about our one-on-one expert help
You may return items that are complete and like new for any reason within 60 days.See the details of our return policy
Earn one point for every dollar you spend and use those points to save on future purchases.Get full details on Crutchfield Rewards
Deep discounts on car installation gear
We offer vehicle-specific installation instructions, dash kits, wiring harnesses, and speaker accessories at deeply discounted prices with car stereo and speaker purchases. Available for most vehicles.Learn more
Trusted since 1974
Our customers have trusted us with their business, and they’ve helped us win awards for our service.Check out our most recent awards
The manufacturer’s warranty always applies.See more details
Pro-Ject Head Box II
Headphone amplifier (Black)
Our take on the Pro-Ject Head Box II by Crutchfield's Dave Bar
Give your headphones the power they need to sound their best
Top-notch headphones are a great way to experience reference-quality sound for a fraction of the price of a high-end loudspeaker system. But if you're plugging your 'phones straight into the headphone jack on your stereo or PC, you could be missing out on the subtle differences that separate great recordings from the merely good ones. That's because a lot of manufacturers use low-cost, low-fi circuitry to drive their headphone jacks leaving you with uninvolving, one-dimensional sound. Pro-Ject's Head Box II headphone amp delivers the power you need to bring out the best in your headphones and your tunes. Connect it between your music source and your 'phones to experience richer, deeper bass, clearer highs, and gobs more detail. You'll also hear farther into your favorite recordings for that "you are there" feeling.
What's in the Box:
- Headphone amplifier
- AC power supply (with attached 5' DC cord)
- Instructions For Use
- low-distortion headphone amplifier
- recommended headphone impedance: >30 ohms
- THD: 0.005%
- frequency response: 30Hz to 20kHz at ±0.5dB (10Hz to 120kHz at -1dB)
- signal-to-noise ratio: 94dB (112dB-A weighted)
- gain: 11dB
- 1 pair line-level RCA stereo audio inputs
- 1 pair line-level RCA stereo audio outputs
- full-size 1/4" stereo headphone output
- oversized outboard power supply with 5' DC cord included
- weight: 20 ounces
- 4-1/16"W x 1-7/16"H x 6"D
- warranty: 1 year
- Our 60-day money-back guarantee
Pro-Ject Head Box II Reviews
Average Customer Review(s):
Thanks for submitting your review
Overview: The Pro-Ject Head Box II headphone amplifier is a compact audio amplifier designed particularly to drive headphones. The external headphone amplifier allows for higher possible volumes and greater audio clarity than the smaller, inexpensive integrated headphone amplifiers that are used in most of today's home receivers or audio players. The Pro-Ject headphone amplifier connects to a line-level (RCA-type) input & output of your AV receiver or directly to the line-level (RCA-type) output of your audio source.
Note: Available with a black or silver front-panel.
Construction: The Pro-Ject Head Box II headphone amplifier employs a metal case to shields the circuitry from vibration and electromagnetic interference.
RCA Input/Output: The Pro-Ject Head Box II headphone amplifier features gold-plated stereo input and output RCA phono jacks. The headphone amplifier's connects to your AV receiver's Tape monitor or CD-R/DVR inputs & outputs. It can also connect directly to your audio source's (CD player, Tape, Turntable) audio output.
Headphone Output: The Pro-Ject Head Box II headphone amplifier is equipped with a front-panel 1/4" headphone jack to plug in your headphones.
Volume Control: The Pro-Ject Head Box II headphone amplifier features a front-panel rotary volume knob to control the volume level of your connected headphones.
Power Requirements: The Pro-Ject Head Box II headphone amplifier operates off of standard household current using the included oversized outboard power supply.
Headphone Jack: 3-pole, 1/4"
Power Output: 330mV / 30-ohms, 60mV / 300-ohms
Input Impedance: 47 kOhms
Signal-to-Noise Ratio: 94 ref. full output (112dB-A weighted), 3W power consumption max.
Frequency Response: 30Hz-20kHz (+/-0.05dB), 10Hz-120kHz (-1dB)
Power Consumption: 16V / 120mA AC
Our Product Research Team
At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.