Question 1

does it come with the extender cord? compatible with M-Audio fast track - cord from the existing headphone jack to amp?

Accepted Answer

To clarify further, it does NOT come with a cord as stated. What you would want to buy is a 1/4" 'TRS' cord to connect from the Fast Track's headphone jack to the input of this headphone amp. These are available on Amazon as well. If you use a regular 1/4" instrument cable, you lose stereo. TRS sends both right and left signals.

Question 2

is this just for volume control, or does it actually amplify bass, highs, lows, etc.

Accepted Answer

This is not a pre-amp for control of bass, treble, etc.  It doesn't change the tonal characteristics.   It merely amplifies the "line-level" output of a device, such as a TV, a CD player, or DVD, or other device, to the level it takes to drive a pair of stereo headphones.  If you just connected your headphones to the audio output of a CD player without the HA-400, for example, you'd barely be able to hear them.  The HA-400 will drive the headphones at any level, from soft to very loud.   It has four volume controls for four headphone listeners.   You don't have to use all four outputs, but it can drive multiple headphones simultaneously if you want.   I use it so that I can listen to a TV through headphones.  My TV only has a "line-level" output level, not adequate to properly drive headphones.  "Line-Level" refers to the audio output level from an audio source (such as a DVD, CD, VCR, Satellite Receiver, Cable Box, etc.) that needs to connect to an amplifier or other device, such as a TV.   It's normally around 1-Volt peak to peak, which isn't enough to drive a pair of headphones adequately.  The headphone amp will boost it enough to drive the headphones.

Question 3

How do I use this with my laptop? I got male extensions but it doesn't seem to be working.

Accepted Answer

Jay, probably the easiest way is to use the following two items: 1) a 3.5 mm (1/8") to 3.5 mm stereo cable. 2) a 3.5 mm (1/8") to 1/4" stereo headphone adapter.  Plug the 3.5 mm cable into your laptop, then use the adapter to plug into the headphone amp.  If this is basically what you are doing and it doesn't work then you have some issue I can't diagnose from afar.  Tommy

Question 4

Does this just split the audio, or does it actually "drive" headphones?  If so, how many Ohms can it handle?

Accepted Answer

It includes an amp for each channel. I don't know the ohms it can handle but I have plugged in light-weight "walkman" style headphones, good quality audiio headphones and earbuds and all are driven just fine, with plenty of volume.  FYI I use this with an optical-digital-to-RCA converter to convert my HDTV's optical audio out to a power sufficient to drive a pair of headphones through roughly 20 feet of thin "headphone extension cord" cable. In this setup, I use one channel of the Behringer with the pot at about 30% and use separate headphone volume controls to cut this down to comfort level.

ASIN	B000KIPT30
Amplifier Type	Solid State
Audio Output Mode	Stereo
Best Sellers Rank	#29,482 in Electronics ( See Top 100 in Electronics ) #57 in Headphone Amps
Brand	Behringer
Built-In Media	Stereo Headphone Amplifier
Color	Black
Compatible Devices	Music Production Equipment, Laptops, Desktops, Gaming Consoles, Tablets, Smartphones
Connector Type	TRS
Customer Reviews	4.5 out of 5 stars 9,320 Reviews
Enclosure Material	Composite
Item Dimensions D x W x H	4.1"D x 2.3"W x 1.8"H
Item Part Number	4033653010856
Item Type Name	MICROAMP HA400 Ultra-Compact 4-Channel Stereo Headphone Amplifier Black
Item Weight	0.82 Pounds
Manufacturer	Music Tribe US
Material	Composite
Mfr Part Number	P0386
Model Name	HA400
Model Number	HA400
Output Channel Quantity	4
Output Wattage	0.04 Watts
Power Source	DC power supply
Product Dimensions	4.1"D x 2.3"W x 1.8"H
UPC	689076149716
Unit Count	1 Count
Warranty Description	Please refer to http://www. Music-group. Com/warranty. Aspx.

Behringer MICROAMP HA400 Ultra-Compact 4 Channel Stereo Headphone Amplifier

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