2Discrete Class-A Amplifier Active with DC Servo Technology for Decreased Distortion
3Dual Monaural Design that Eliminates Interference between Left and Right Channels
4MUSES8920 Op-Amps Chip-Sets for High-End Quality
5A Large Toroidal-Core Power Transformer
6Damping Factor Selector to Optimize Headphone Characteristics
7Total 2,800mA of Output Power Drives Your High Impedance Headphones
8Robust Aluminum Body with a Classy Appearance
9Well-Designed User Interface
10Professional-Grade Input/Output Connectors
11Switchable Output Mode for Flexibility
The black HA-501 Full Analog Dual-Monoaural Headphone Amplifier from Teac is a Class-A amplifier that delivers superior sound quality. Featuring a sleek and modern look with a rugged but compact design, the amplifier supplies regular headphone listeners with quality sound.
Pair it with your favorite headphones the same way you would a normal amplifier with favored speakers and take advantage of DC Servo Technology, Switchable Damping Factors, High Output Power, and a large Toroidal-Core Power Transformer, and relax to your favorite music or radio broadcast.
Discrete Class-A Amplifier Active with DC Servo Technology for Decreased Distortion
This amplifier utilizes Active DC Servo Technology in order to eliminate Offset Electrical Potential.
Dual Monaural Design that Eliminates Interference between Left and Right Channels
In regards to the circuit design, each channel is completely designed on an individual basis to avoid signal interface to/from another. This contribution eliminates cross-talk, crucial headphone listening.
MUSES8920 Op-Amps Chip-Sets for High-End Quality
MUSES8920 Op-Amp Chip-Sets are designed for high-end audio. Employed individually on the Left and Right channels, they help achieve superior sound. This op-amp performs superb IV-conversion.
A Large Toroidal-Core Power Transformer
An over-sized Toroidal-core power transformer is also employed to supply stable current to the every part of the circuit.
Damping Factor Selector to Optimize Headphone Characteristics
Each pair of headphones has its Damping Factor, a resisting force against non-intentional movement of the diaphragm, moving air forward and backward as sound. Since headphones' diaphragms are activated by a very small current, the damping factor increases, the sound is lean and crisp, and has a close relationship with headphones' impedance. Therefore, selecting the right Damping Factor is crucial in order for your headphones to perform at their peak potential. The HA-501 Amplifier provides 5 selectable Damping Factors, so users have the best suited signal for multiple headphones.
Total 2,800mA of Output Power Drives Your High Impedance Headphones
The HA-501 Amplifier achieves 1,400mW output power per channel at 32Ω impedance. The device delivers not only enough power to drive standard headphones with an impedance range from 80 to 250Ω, but also high-class 600Ω hi-fi headphones.
Robust Aluminum Body with a Classy Appearance
The HA-501 Amplifier has a small footprint and classy appearance, and is constructed with aluminum panels to create an authentic but modern looking hi-fi component. A robust metal construction helps eliminate vibrations that may affect the sound quality. The bottom and sidewalls are formed with a steel chassis, aluminum for the front panel and the rear panel out of steel. In order to ensure its rugged design, each panel is connected with a beam that runs through the center of the unit.
Well-Designed User Interface
Another feature of the HA-501 Amplifier is its user-friendly design. The firm-torqued volume control allows users to adjust the volume level with ease and precision while the toggle-type power switch assures On/Off operation at a glance. Auto-muting function protects your ears from unexpected loud sounds when switching between headphones with different levels of impedance.
Professional-Grade Input/Output Connectors
On the rear panel, a pair of Neutrik brand XLR input connectors allow users to connect high-end components or professional audio equipment, while wider-pitch RCA pin jacks allow user to connect large-shaft RCA pin cables from other markets. A detachable type 3-polar power inlet socket is also available. On the front, a 3.5mm stereo mini-jack allows users to connect a portable music player, such as an iPod, conveniently.
Switchable Output Mode for Flexibility
Line output level from the rear panel can be switched amongst Fixed Level, Variable Level (coupled with volume), and Off.
The amplifier features a full-metal jacket with aluminum panels for front top and sides. Small footprint fits your desktop. It also features precisely machined aluminum knobs (Volume, Input Selector, Damping Factor Selector).
Teac HA-501 Specs
Number of Headphone Channels
Recommended Headphone Impedance
16 to 600 Ohms
Headphone Output Power
1400 mW per Side into 32 Ohms (Max) 135 mW per Side into 600 Ohms (Max) 600 mW per Side into 32 Ohms (Rated) 34 mW per Side into 600 Ohms (Rated)
Analog Audio I/O
1 x 1/4" TRS Stereo Headphone Output 1 x 1/8" / 3.5 mm TRS Stereo Aux Input 2 x Stereo RCA Line Input 2 x XLR 3-Pin Balanced Input (1 Stereo Pair)
Outputs: 2 Hz to 100 kHz +0/-3 dB 10 Hz to 100 kHz ±3 dB
1/8" / 3.5 mm Aux Inputs: 13 Kilohms RCA Line Inputs: 10 Kilohms RCA Line Outputs: 100 Ohms XLR Inputs: 20 Kilohms
0.002% (32-Ohm Load) 0.01% (600 mW, 32-Ohm Load)
RCA Inputs: 110 dB (1 kHz, A-Weighted)
76 at 32 Ohms (High Setting) 98 at 64 Ohms (High Setting) 97 at 120 Ohms (Mid Setting) 115 at 300 Ohms (Mid Setting) 118 at 600 Ohms (Low Setting)